The cheapest credit card processing option depends on how much you process, your average transaction size, and whether customers pay in person or online. For many growing small businesses, Helcim is my top low-cost choice because it charges no monthly fee, uses interchange-plus pricing, and automatically lowers its markup as processing volume grows. Square is a better starting point for many new and low-volume businesses, while Stripe is a strong option for online payments, while Stax becomes more competitive at higher volumes.
There is no single processor that will be cheapest for every business. A processor with a higher advertised rate can cost less overall once monthly fees, per-transaction charges, card mix, and average ticket size are taken into account.
In this guide, I evaluated low-cost credit card processing companies based on pricing, features, support and reliability, user experience, and user reviews. Here are my picks for the cheapest credit card processing providers for 2026:
Cheapest credit card payment processing at a glance
Provider | Best for | Monthly fee starts at |
| Helcim | Cheapest overall | $0 |
| Stax | High-volume businesses | $99 |
| Adyen | Enterprise unified commerce | $0 |
| PayPal | Additional payment method | $0 |
| Square | New and small businesses | $0 |
| Stripe | Online businesses | $0 |
| CardX | Surcharging | $99 |
| PaymentCloud | High-risk businesses | $10 |
Methodology
At TechnologyAdvice, we evaluate credit card processors using a comprehensive, research-driven rubric designed to balance pricing transparency, product capability, reliability, and real-world usability. Our process combines vendor research, feature testing, competitor analysis, and first-hand experience through demos and trial accounts whenever available.
TechnologyAdvice writers often take advantage of free trials and demos to get a first-hand user experience of available solutions. We rely on an internal algorithm to calculate star ratings, which are based on many factors. For this list, we focused on mid- to large-sized businesses that process high transaction volumes and require scalable, reliable payment solutions
Below is a breakdown of the categories I used to grade each platform. Each category also includes my expert score, which contributes to its overall score.
- Pricing (20%): We analyzed each provider’s initial setup costs, fee structures, and ongoing costs, with higher scores given to those offering transparent, interchange-plus or subscription pricing, no setup or cancellation fees, and automated volume discounts. We also considered chargeback fees and the availability of predictable, low-cost options for businesses processing large volumes.
- Features (30%): Feature evaluation focused on the breadth of supported payment methods and the quality of built-in tools. We awarded points for capabilities such as in-person payments and hardware, ecommerce integration, virtual terminals, mobile payments, invoicing and recurring billing, surcharging, payment links or QR codes, deposit speed, and global or multi-currency support. Platforms with these features built in, rather than offered only via integrations or paid add-ons, received higher scores.
- Support and reliability (25%): Customer service and operational dependability are vital for payment continuity. We evaluated the availability of support (24/7, extended hours, or business hours), developer tools and customization, chargeback protection, and fraud detection or risk tools. We also considered security and PCI compliance standards and system reliability or uptime, giving top marks to processors with strong, automated protections and proven enterprise-grade stability.
- User experience (15%): This category reflects how easily a business can start, scale, and manage payments. We assessed the application and onboarding process, contract flexibility, ease of use, and overall scalability. Additional credit went to providers with unified dashboards that centralize in-person, online, and invoicing channels for true omnichannel management.
- User reviews (10%): To balance expert evaluation with customer sentiment, we factored in verified user reviews from Capterra, G2, and Software Advice. Each review source was normalized into a percentage score to maintain consistency across platforms. These insights ensure our rankings reflect both vendor performance and real-world user satisfaction.
Update notes
- July 6, 2026: Agatha Aviso introduced cost comparison tables and scenarios to help readers find the best solution based on their business needs. She also explained pricing models of processing providers.
- May 11, 2026: Andrea Herrera reviewed this article, fact-checked it to reflect the most updated data, and ensured provider scores accurately represent her evaluation. She also revamped the formatting of this guide for better readability.
- November 12, 2025: Andrea Herrera updated this article to reflect the latest credit card processor data and feature changes for mid- to large-sized businesses. The evaluation rubric was revised to include new criteria, such as payment links, multi-currency support, and fraud detection tools, and Adyen was added as a top-rated provider. Scores and “best for” categories were adjusted accordingly based on the updated 2025 methodology.
- January 7, 2025: Andrea Herrera reviewed the evaluation criteria and updated scores for each processor. She updated pricing and features and rewrote provider sections based on her latest findings.
Why you can trust TechnologyAdvice
I’ve written and reviewed more than 20 POS and payment software guides, covering dozens of providers across mobile payment apps, POS systems, and merchant services. I also bring over a decade of experience working with small businesses, especially ecommerce retailers, which shapes how I judge what actually works in day-to-day operations.
Cheap credit card processing compared
Provider | Our score out of 5 | Pricing model | Processing fee | Chargeback fee | Deposit speed |
| Helcim | 4.37 | Interchange-plus | Interchange + 0.15% + 6 cents to 0.50% + 25 cents | $15, refundable | 1-2 business days |
| Stax | 4.31 | Subscription | Interchange + cents-per-transaction fee | $25, nonrefundable | 1-2 business days; instant available for a fee |
| Adyen | 4.27 | Interchange++, pricing varies by payment method | For US Visa and Mastercard: $0.13 + Interchange++ + 0.80% | $25, nonrefundable | 1-2 business days |
| PayPal | 4.22 | Flat-rate | 2.29% + 9 cents to 3.49% + 49 cents | $20, nonrefundable | 1-2 business days; instant available for a fee |
| Square | 4.19 | Flat-rate | 2.4% + 15 cents to 3.5% + 15 cents, depending on plan/payment type | $0 | Next business day; instant available for a fee |
| Stripe | 4.10 | Flat-rate, custom pricing available | 2.7% + 5 cents to 3.4% + 30 cents | $15, nonrefundable | 1-2 business days; instant available for a fee |
| CardX | 3.99 | Surcharging | 0% merchant-paid credit card processing | $0 | Next business day |
| PaymentCloud | 3.89 | Quote-based, risk-based | 2% to 4.3% | $25, nonrefundable | 1-2 business days |
Update note: Adyen’s previous score was 4.41. I lowered its pricing score because its discounts are not automatically applied in the same way as Helcim’s published volume tiers, and lowered its hardware score because dedicated terminal pricing does not meet the rubric’s sub-$50 hardware threshold. Its revised overall score is 4.27.
Adyen currently lists US Visa and Mastercard pricing at $0.13 plus 0.80% plus Interchange++, while Helcim publishes automatic processing-volume tiers beginning at interchange + 0.40% + 8 cents in person and interchange + 0.50% + 25 cents online.
*Credit card processing pricing models compared
Pricing model | How it works | Usually cheapest for | Watch out for |
| Custom enterprise pricing | Rates are negotiated based on volume, geography, payment methods, and business model. | Large, global, multilocation, or platform businesses. | Harder to compare because pricing is quote-based and onboarding can take longer. |
| Interchange-plus | The processor passes through card network costs, then adds a stated markup. | Growing SMBs that want more transparent pricing and lower effective rates. | Costs vary by card type, transaction type, and sales mix. |
| Subscription | The merchant pays a monthly fee, then a low per-transaction markup over interchange. | High-volume businesses that can offset the monthly fee through lower transaction costs. | Not cost-effective if volume is too low. |
| Flat-rate | One predictable percentage plus cents per transaction. | New businesses, low-volume sellers, and businesses that want simple billing. | Can become expensive as volume rises, especially for larger average tickets. |
| Surcharging | Eligible credit card fees are passed to customers where legally permitted. | Businesses that want to reduce merchant-paid credit card fees. | Compliance rules, debit card limits, customer friction, and state restrictions. |
| Risk-based pricing | Rates are based on business risk, industry, chargeback history, and approval likelihood. | High-risk merchants that cannot qualify with standard providers. | Usually more expensive than mainstream processing for low-risk businesses. |
Related: Credit Card Processing Fees: Complete Guide
Cheapest credit card processor by monthly volume
The cheapest credit card processor is not always the provider with the lowest advertised rate. Monthly volume matters, but average ticket size and the number of transactions matter, too. A processor charging 10 cents per transaction affects a business selling $10 items very differently from one with a $200 average ticket.
Use these ranges as starting points rather than hard break-even rules:
| Monthly card volume | Cheapest fit | Why |
|---|---|---|
| Under $10,000 | Square Stripe | No monthly fee and simple flat-rate pricing often beat paid plans at low volume. |
| $10,000 to $40,000 | Helcim | Interchange-plus pricing, no monthly fee, and automatic volume discounts can lower total processing costs as sales grow. |
| $40,000 to $50,000+ | Stax | Subscription pricing can become cheaper once volume is high enough to offset the monthly fee. |
| $50,000 to $100,000+ | Helcim Stax | Helcim’s volume discounts and Stax’s low per-transaction markup both become more competitive at this range. |
| $250,000+ or multilocation | Adyen | Larger merchants can negotiate custom pricing and support more payment methods, countries, and sales channels. |
| Any volume, legal surcharging scenario | CardX | Surcharging can reduce merchant-paid credit card costs where permitted, but it requires compliance and clear disclosure. |
| Any volume, high-risk business | PaymentCloud | The cheapest practical option may be the provider most likely to approve and maintain the account. |
Why average transaction size changes which processor is cheapest
Two businesses can each process $20,000 per month and still pay very different fees. A business making 2,000 $10 sales is affected much more by a 15-cent or 30-cent transaction fee than a company processing 100 $200 payments.
For small-ticket sales, pay close attention to the fixed cents-per-transaction charge. For larger-ticket transactions, the percentage markup usually has a greater effect on the final processing bill.
This is also why I would not choose a processor based on monthly volume alone. Before switching providers, calculate your current:
- Monthly card volume
- Number of transactions
- Average ticket size
- Percentage of card-present versus card-not-present payments
- Card mix
- Monthly and account fees
Related: Payment Processing for Small Business: The Ultimate Guide
Helcim: Cheapest overall credit card processor
Pros
- Interchange-plus pricing model
- Automatic volume discount
- Surcharging option
Cons
- Higher cost for Amex transactions
- Only for businesses in US and Canada
Why I picked Helcim
Helcim is my top overall pick because its pricing addresses two of the biggest problems businesses encounter when looking for cheap processing: monthly fees and rising processing volume. There are no monthly processing fees, and its interchange-plus markup decreases automatically as card volume increases.
Its published in-person markup begins at interchange + 0.40% + 8 cents for businesses processing up to $50,000 per month and drops through several volume tiers. Keyed and online transactions begin at interchange + 0.50% + 25 cents. Unlike processors that require merchants to contact sales to negotiate better rates, Helcim recalculates the appropriate volume tier automatically using the merchant’s recent processing average.
I also like Helcim’s surcharging option for businesses that are legally able and willing to pass eligible credit card fees to customers.
Helcim will not automatically be the cheapest processor at every volume or average ticket. Low-volume merchants may find Square's flat rates easier to predict, while very high-volume businesses should compare Helcim against subscription pricing from Stax and negotiated pricing from other processors.
Related: 7 Best Credit Card Processing Companies
Pricing
| Monthly Transaction Volume | Online and Keyed-In Transaction Rates | In-Person Transaction Rates |
|---|---|---|
| $0-$50,000 | + 0.50% + $0.25 | + 0.40% + $0.08 |
| $50,001-$100,000 | + 0.45% + $0.20 | + 0.35% + $0.07 |
| $100,001-$500,000 | + 0.35% + $0.20 | + 0.25% + $0.07 |
| $500,001-$1,000,000 | + 0.25% + $0.15 | + 0.20% + $0.06 |
| $1,000,001 up | + 0.15% + $0.15 | + 0.15% + $0.06 |
- Hardware: $99-$329
Key features
- No monthly fees: No set-up, monthly, or cancellation fees, making it a cost-effective choice.
- Interchange plus pricing: Transparent pricing structure, often leading to lower costs than flat-rate or tiered pricing.
- Automatic volume discounts: Additional savings as your transaction volumes increase.
- Surcharging option: Ability to pass processing fees onto customers, reducing business expenses.
- Integrated payment solutions: Includes in-person, online, and mobile payment processing.
- Comprehensive reporting: Detailed transaction and financial reports to help manage your business.
- Customer management tools: Features like invoicing, recurring billing, and customer relationship management (CRM) tools.
- Security and compliance: PCI-DSS compliance and advanced security features to protect sensitive data.
- Gross payouts: Receive the full transaction amount upfront, with fees deducted later, simplifying reconciliation and cash flow management.
Gallery
Helcim has a card reader, a smart terminal, and other point-of-sale hardware for in-person credit card processing. Source: Helcim 
The Helcim dashboard allows users to view customers, products, integrations, and back-office tools. Source: Helcim 
Helcim’s virtual terminal is free to use for Helcim customers (keyed-in card processing fees apply). Source: Helcim 
Helcim’s chargeback dashboard allows businesses to easily see and manage all their chargebacks. Source: Helcim 
Helcim businesses can quickly view their sales when they login to their dashboard. Source: Helcim
Stax: Cheapest credit card processor for high-volume businesses
Pros
- Interchange-plus with no percentage markup
- 24/7 technical support
- Automatic updates for stored credit cards
Cons
- Monthly fee starts at $99
- Only for businesses in the US
- Some features require add-ons
Why I picked Stax
Stax is worth comparing once transaction volume is high enough that reducing percentage-based processor markup matters more than avoiding a monthly subscription. Instead of adding a percentage markup to interchange, Stax charges a subscription and cents-per-transaction fee.
I would not use a single monthly sales figure as a universal break-even point. Your actual savings depend on average ticket size, number of transactions, card mix, and the plan you qualify for. Businesses considering Stax should compare a recent processing statement against a Stax quote before switching.
Stax currently starts at $99 per month for businesses processing up to $150,000 annually, $139 per month for $150,000 to $250,000, and $199+ for more than $250,000.
Pricing
| Monthly Transaction Volume | Monthly Fee | Card-Present Transaction Fee | Card-Not-Present Transaction Fee |
|---|---|---|---|
| Up to $150,000 | $99 | Interchange + $0.08 | Interchange + $0.15 |
| $150,000-$250,000 | $139 | Interchange + $0.08 | Interchange + $0.15 |
| $250,000 and above | $199 | Interchange + $0.08 | Interchange + $0.15 |
- Hardware: $49–$1,799
Key features
- No percentage markup: Low interchange-plus transaction fees without any percentage markup, making it cost-effective for high-volume businesses.
- Transparent pricing: Clear and straightforward pricing model, helping businesses understand their costs easily.
- Robust analytics and reporting: Comprehensive tools for detailed financial and transaction reporting.
- Seamless POS integration: Compatibility with various POS systems for smooth and efficient operations.
- 24/7 customer support: Reliable and responsive customer service is available around the clock.
- Recurring billing and invoicing: Convenient features for managing subscription services and regular billing cycles.
- API access: Developer-friendly APIs for easy integration with existing business systems and applications.
- Automatic update to stored credit cards: Ensures stored customer credit card information is kept current, reducing transaction declines and improving customer experience.
Gallery
The Stax dashboard provides access to reports, invoices, payment links, disputes, and customers, among others. Source: Stax 
Stax offers a wide range of hardware options from SwipeSimple, Dejavoo, and Clover. Source: Stax
Adyen: Best enterprise unified commerce
Pros
- Global reach and unified commerce
- Advanced fraud and risk management
- Transparent interchange-plus pricing
Cons
- Longer onboarding process
- Higher complexity
- Chargeback fees apply
- Dedicated terminal pricing is less accessible for simple SMB cost comparisons
Why I picked Adyen
Adyen remains one of my strongest choices for large and international businesses, but I no longer rank it above Helcim for this particular guide. Its strength is less about being the cheapest plug-and-play processor and more about combining payments across countries, payment methods, and sales channels in one enterprise platform.
That distinction matters for this ranking. Adyen offers volume-based and negotiated commercial terms, but these are not the same as Helcim’s published automatic volume discounts. I therefore scored Adyen lower on the rubric’s volume-discount criterion. I also reduced its hardware score because dedicated terminal costs do not fit the rubric’s lower-cost hardware tier.
For enterprises with high processing volume, multiple countries, or complex omnichannel requirements, Adyen may still produce very competitive total costs. Smaller merchants primarily looking for the lowest processing expense will generally find Helcim easier to price and compare.
Pricing
Adyen uses a transparent interchange-plus pricing model, meaning businesses pay the actual card network interchange rate plus a small processing markup, typically around 0.6% + interchange. There are no setup or monthly fees, and volume discounts are applied automatically as your processing increases. Chargebacks incur a $25 non-refundable fee, and standard payout times are 1-2 business days, depending on the region and currency.
Here are some of the processing fees for Adyen merchants:
| Payment method | Payment method fee | Adyen processing fee |
|---|---|---|
| American Express (AMEX) | 3.3% + $0.10 | $0.13 |
| Discover | 3.95% | $0.13 |
| Mastercard | Interchange + 0.60% | $0.13 |
| Visa | Interchange + 0.60% | $0.13 |
- Hardware: Starts at $0 using Tap to Pay on iPhone and Android
Key features
- Interchange++ and payment-method-specific pricing
- Unified commerce: One platform for online, in-person, and mobile payments with a single dashboard.
- Global & multi-currency: Accept and settle in 100+ currencies with local payment methods.
- Virtual Terminal (MOTO): Keyed payments from the browser for phone and mail orders.
- Payment Links & QR codes: Shareable Pay by Link pages that can display scannable QR codes.
- Recurring billing & tokenization: Built-in subscriptions, saved cards, and customer vault.
- Advanced fraud protection: RevenueProtect (ML + rules), 3D Secure, and robust dispute tools.
- Developer-friendly stack: Mature APIs/SDKs, webhooks, sandbox, and extensive integrations.
- Omnichannel hardware options: Android-based countertop/mobile terminals and Tap to Pay support.
- Reporting & reconciliation: Real-time insights, payout reconciliation, and exportable reports.
Gallery
Adyen’s Shopper Origin dashboard shows foreign vs. domestic shopper trends, transaction volumes, and average values by country. (Source: Adyen) 
Adyen supports seamless in-person payments with contactless options, including Tap to Pay on mobile devices and Android-based terminals. (Source: Adyen) 
Adyen’s dashboard provides real-time insights into API performance, transaction success rates, and account activity for seamless payment management. (Source: Adyen)
PayPal: Cheap additional payment method
Pros
- Quick and easy sign-up and widely popular
- Flat-rate pricing with no monthly fees
- Easy integrations
- Accepts Venmo and PayPal Pay Later
Cons
- Complicated pricing structure
- Account stability issues
- Add-on fees for virtual terminal
Why I picked PayPal
I recommend PayPal primarily as an additional checkout option rather than the cheapest primary processor for most businesses. It has no required monthly fee for standard payment acceptance and is widely supported by ecommerce platforms, making it easy to add without replacing an existing processor.
PayPal is particularly useful when customers actively want to pay using a PayPal balance, Venmo, or Pay Later option.
Its downside for a cost-focused business is that fees vary considerably depending on how the payment is accepted. Compare the exact transaction types you expect to use rather than relying on one advertised rate.
Pricing
- Monthly fee: $0-$30
- PayPal Point of Sale in-person transaction fee: 2.29% + $0.09
- Online checkout transaction fee: 2.89% + $0.29
- Keyed-in transaction fee: 3.49% +$0.09
- Virtual terminal: 3.39% + $0.29
- Invoicing: 3.49% + $0.49
- QR code payments: 2.29% + $0.09
- Venmo payments: 3.49% + $0.49
- Hardware: $0-$269
Key features
- Global recognition: Trusted and widely used payment method, increasing customer confidence.
- Flat-rate pricing: Simple and predictable fees, making cost management straightforward.
- No setup or monthly fees: Cost-effective for businesses looking to add an additional payment option.
- Ease of integration: Seamlessly integrates with various ecommerce platforms and POS systems.
- Secure transactions: Advanced security measures and buyer protection policies to safeguard transactions.
- International payments: Supports multiple currencies, making it ideal for businesses with global customers.
- Customer convenience: Offers various payment methods, including credit cards, debit cards, PayPal balance, PayPal Credit, and Venmo.
Gallery
PayPal users may easily view all their transactions from their dashboard. Source: PayPal 
PayPal Business offers other tools for business such as PayPal Checkout for accepting payments on a website, subscription plans, and insights on shoppers. Source: PayPal 
PayPal Business users can easily integrate a PayPal button on their checkout page. Source: PayPal Business 
PayPal offers PayPal Zettle’s POS solutions for accepting in-store payments. Source: PayPal
Square: Best for small and new businesses
Pros
- No starting and ongoing fees
- Instant approval
- Free magstripe reader
Cons
- Account stability issues
- Flat-rate fees can cost more than interchange-plus pricing as volume increases
- Limited customer support hours
Why I picked Square
Square is one of my first recommendations for new and low-volume businesses because it removes many of the fixed costs that make traditional merchant accounts impractical at lower sales volumes. Square Free has no monthly subscription fee, and businesses can accept payments through POS, invoices, payment links, virtual terminal, and Tap to Pay without necessarily buying a dedicated terminal.
Its flat-rate pricing also makes monthly processing expenses easier to estimate.
I would not use $10,000 per month as a hard point where Square suddenly becomes expensive. Instead, compare Square against interchange-plus pricing as volume and average ticket size increase. Square also offers lower in-person rates on its paid plans, and businesses processing more than $250,000 annually can contact Square about custom processing rates.
Related: 6 Best Free Merchant Accounts 2026: No Fees, No Catch
Pricing
| Plan | Monthly Fee | In-person Transaction Fee | Keyed-in Transaction Fee | Online Transaction Fee Square Free Plan |
|---|---|---|---|---|
| Square Free Plan | $0 | 2.6% + $0.15 | 3.5% + $0.15 | 3.3% + $0.30 |
| Square Plus Plan | $49 | 2.5% + $0.15 | 3.5% + $0.15 | 2.9% + $0.30 |
| Square Premium Plan | $149 | 2.4% + $0.15 | 3.5% + $0.15 | 2.9% + $0.30 |
- Hardware: $0-$799
Key features
- Flat-rate pricing: Simple and predictable pricing structure, ideal for businesses with low transaction volumes.
- No monthly fees: No setup, monthly, or cancellation fees, providing flexibility without long-term commitments.
- Integrated POS systems: Comprehensive point-of-sale solutions for in-person transactions.
- Ecommerce capabilities: Website builder to easily set up and manage online stores.
- Invoicing: Convenient invoicing features for efficient billing and payment collection.
- Robust analytics and reporting: Detailed insights and reports to help businesses make informed decisions.
- Inventory management: Seamless integration to track and manage inventory in real-time.
- Customer relationship management: Tools to track customer interactions and build loyalty.
- Mobile payment options: Ability to accept payments on the go with mobile devices.
- User-friendly interface and quick approval: Intuitive design and easy sign-up process that allows businesses to get started immediately.
Gallery
Users can see their sales, inventory, upcoming deposits, and customers through the Square dashboard. Source: Square 
Users can see all their deposits through the Square dashboard. Source: Square 
Square does not have a chargeback fee and has a dispute dashboard to make it easy for businesses to manage chargebacks. Source: Square 
The Square Register and Square Terminal are Square’s all-in-one POS solutions. Source: Square 
Square card readers that can be used at the counter or on the go. Source: Square
Stripe: Best for online businesses
Pros
- Quick instant sign-up
- Robust developer tools and powerful APIs
- Transparent pricing with no monthly fees
Cons
- Requires integration for in-person payment processing
- Account freezes
Why I picked Stripe
Stripe is the best choice for small online businesses. It offers a powerful and flexible payment processing solution. Its competitive, transparent pricing model makes it easy for businesses to predict and manage their costs.
For a small online business processing relatively low monthly volume, Stripe's lack of a required monthly processing subscription can be more economical than paying for a subscription-based merchant account. As volume rises, however, compare Stripe’s flat-rate pricing with Helcim’s interchange-plus model and request custom pricing from Stripe if your volume justifies it.
Related: Best Online Payment Processors
Pricing
- Monthly fee: $0
- Card-present transaction fee: 2.7% + $0.05
- Online transaction fee: 2.9% + $0.30
- Recurring payments: additional 0.5% per transaction
- Invoicing: additional 0.4%-0.5% per transaction
- Hardware: $59-$249
Key features
- Transparent pricing: Competitive, straightforward pricing with no hidden fees.
- Developer-friendly tools: Extensive APIs and developer resources for custom payment solutions.
- Seamless integration: Easily integrates with various ecommerce platforms and business applications.
- Global payment support: Accepts a wide range of payment methods and currencies, ideal for international sales.
- Advanced security: PCI-DSS compliance and advanced security measures to protect transactions.
- 24/7 customer support: Reliable support to assist with any issues or questions.
Gallery
Stripe allows businesses to easily create and customize a one-page checkout page. Source: Stripe 
Stripe’s invoicing tool is easy to customize. Source: Stripe 
Stripe offers several hardware options for in-person payment processing. Source: Stripe
CardX: Best for reducing merchant-paid credit card fees
Pros
- Fully compliant automatic surcharging (where permitted)
- No-cost credit card processing
- Quick integration with ecommerce websites
Cons
- Limited hardware options
- Only available for businesses in specific locations
- Higher monthly fees at higher monthly transaction volume
Why I picked CardX
CardX is different from the other processors on this list because it focuses on surcharging rather than simply charging the merchant a lower processing rate. For businesses permitted to surcharge eligible credit card transactions, this can reduce the amount of processing cost absorbed by the business.
I would avoid calling this literally “free” credit card processing. The processing cost still exists, but eligible fees are shifted to the customer. Businesses also remain responsible for following card-brand and applicable legal requirements.
Pricing
- Starts at $99 per month
- Actual monthly fee will depend on the monthly transaction volume
- Hardware: $375-$540
Key features
- Zero-cost credit card processing: Eliminates credit card processing fees by passing costs to customers via surcharges.
- Fully compliant: Adheres to all state and federal regulations for surcharging in 48 states plus the District of Columbia.
- Transparent pricing: Clear and straightforward pricing model with no hidden fees.
- Ecommerce integration: Easy-to-generate payment button that allows you to link a checkout page to your website.
- Virtual terminal: Process credit card payments with zero cost through your virtual terminal.
- Billing and invoicing: Accept credit card payments with surcharging by creating and sending one-time or recurring invoices.
- Fraud protection: PCI-DSS compliance and robust security features to protect transactions.
Gallery
CardX allows you to add a Lightbox payment button to your website. Source: CardX 
CardX receipts clearly show the credit card fee passed on to the customer. Source: CardX 
CardX’s fraud protection tools allow businesses to set AVS and CVV settings. Source: CardX
PaymentCloud: Best for high-risk business
Pros
- Supports high-risk business
- Free card reader
- High approval rate
Cons
- Pricing is not publicly disclosed
- Longer application and approval process
- Higher fees for high-risk businesses
Why I picked PaymentCloud
For a high-risk business, the cheapest processor on paper may be irrelevant if it will not approve or retain the account. That is why PaymentCloud remains my pick for this use case.
Pricing is not readily available because actual rates depend on the merchant's industry, processing history, chargeback exposure, and underwriting profile.
Instead of comparing PaymentCloud directly with low-risk flat-rate processors, I would request a quote and compare total monthly costs with other high-risk merchant account providers. Pay particular attention to reserves, monthly fees, gateway fees, chargeback costs, contract terms, and early termination fees.
Related: Best High Risk Merchant Account Providers for 2026
Pricing
- Monthly fee: $10-$45
- Low-risk transaction fee: 2%-3.1%
- Mid-risk transaction fee: 2.3%-3.4%
- High-risk transaction fee: 2.7%-4.3%
- Virtual terminal fee: $15-$45 per month
- Hardware: $0-$2,068
Key features
- Specialized high-risk services: Tailored solutions for businesses in high-risk industries.
- Extensive experience: Proven track record in managing high-risk business accounts.
- Fraud prevention and chargeback management: Tools and support to mitigate risks and protect revenue.
- Competitive pricing: Wide range of rates but relatively cost-effective for high-risk businesses.
- High approval rate: Strong approval rates for various high-risk business types.
- Dedicated support team: Expert assistance to help navigate the complexities of high-risk payment processing.
- Seamless integration: Easy integration with various e-commerce platforms and business applications.
Gallery
PaymentCloud allows you to create a customized checkout page. Source: PaymentCloud 
PaymentCloud offers comprehensive chargeback management to help prevent and manage disputes. Source: PaymentCloud 
PaymentCloud’s dashboard allows businesses to quickly see their sales, activity, tools, and analytics. Source PaymentCloud
What is the cheapest credit card processor for a small business?
For many growing small businesses, Helcim is the cheapest processor to compare first because it combines a $0 monthly fee with interchange-plus pricing and automatic volume discounts. Square can be cheaper or simpler for new and low-volume merchants, particularly when avoiding fixed monthly fees matters more than reducing the percentage markup. Stripe is a strong alternative for online businesses.
For higher-volume merchants, compare Helcim with Stax and negotiated processing offers. Stax charges a monthly subscription instead of adding a percentage markup to interchange, so its pricing can become more attractive once transaction volume is high enough to justify the fixed monthly fee.
The cheapest provider for your business ultimately depends on total monthly cost, not one advertised percentage.
What cheap credit card processing really costs
To compare processors accurately, calculate your effective processing rate rather than looking at the headline transaction rate.
Effective processing rate = total processing costs ÷ total card sales × 100
Total processing costs can include transaction charges, monthly fees, PCI or gateway fees, chargebacks, hardware, payout fees, and other account charges.
Cost factor | Why it matters | What to check before choosing |
| Custom pricing | Quote-based pricing can be cheaper for large merchants, but harder to compare upfront. | Ask for an effective-rate estimate based on your volume, payment mix, and average ticket size. |
| Interchange and card mix | Rewards, corporate, international, and card-not-present transactions can cost more. | Ask whether published rates include interchange or sit on top of it. |
| Monthly fee | A $0 monthly plan can be cheaper at low volume, but a paid plan can be cheaper once sales increase. | Compare total monthly cost, not just the monthly software fee. |
| Card-present rate | In-person transactions usually cost less because the card is physically verified. | Separate in-person transactions from online, invoice, and keyed payments. |
| Card-not-present rate | Online, invoice, keyed, and virtual terminal payments usually carry higher risk and higher fees. | Estimate what share of payments will be keyed or online. |
| Average ticket size | Fixed transaction fees take a larger percentage of a small transaction. | Calculate costs using your actual average sale. |
| Chargebacks | Chargeback fees and lost processing fees can erase savings. | Check chargeback fees, dispute tools, and risk monitoring. |
| PCI, statement, gateway, or batch fees | Small recurring fees can raise the real cost of a “cheap” processor. | Confirm whether these fees are included, waived, or billed separately. |
| Hardware | Cheap processing can still require card readers, terminals, stands, or accessories. | Check upfront hardware costs and avoid long hardware leases. |
| Contracts and cancellation fees | A low advertised rate may be tied to a long contract. | Look for month-to-month terms and no early termination fees. |
| Funding speed | Faster deposits can cost extra or may vary by provider. | Check standard payout speed and instant payout fees. |
| Surcharging compliance | Surcharging is not the same as free processing. | Confirm state rules, card-brand rules, debit restrictions, and disclosure requirements. |
| Account holds | Low-cost aggregators may hold funds if transactions look unusual or risky. | High-risk or fast-growing businesses should prioritize account stability. |
How to lower credit card processing fees
Lowering processing costs involves more than choosing the provider advertising the lowest rate.
Negotiate with providers
If your processor does not lower rates automatically, ask whether you qualify for volume or custom pricing. Bring a recent processing statement so the provider can quote against your actual transaction mix rather than an estimated headline rate.
Square, for example, directs businesses processing more than $250,000 annually to discuss custom pricing, while Helcim automatically moves qualifying merchants through its published volume tiers.
Consider interchange-plus pricing
Interchange-plus pricing separates the underlying interchange cost from the processor’s markup, making the markup easier to identify.
This does not mean interchange-plus will always beat flat-rate pricing, especially at very low volume. But it becomes increasingly useful to compare as processing volume grows.
Reduce chargebacks
Aside from chargeback fees, businesses may lose the transaction amount and other associated costs when disputes are lost. Use fraud detection, clear billing descriptors, documented refund policies, and accurate transaction records to reduce avoidable disputes.
Use surcharging carefully
Businesses permitted to surcharge eligible credit card transactions may be able to reduce the processing expense they absorb.
Surcharging is not the same as eliminating processing fees. The cost is shifted to the cardholder, and businesses need to follow applicable card-network and legal requirements.
Review your processing costs regularly
Calculate your effective processing rate at least periodically, especially after a meaningful increase in monthly sales or average ticket size. A provider that was inexpensive at $5,000 per month may not remain your cheapest option at $50,000.
Encourage lower-cost payment methods
ACH and other bank payment methods can cost less than credit cards for some transactions, especially larger invoices. If the payment method works for both you and the customer, offering lower-cost alternatives can reduce your blended payment expense.
FAQs
What credit card processor has the lowest rates?
Helcim is one of the lowest-cost processors I recommend for growing businesses because it combines no monthly processing fee with interchange-plus pricing and automatic volume discounts. Stax can become competitive for high-volume businesses because it uses subscription pricing with no percentage markup on direct-cost interchange. The lowest-cost choice still depends on transaction volume, average ticket size, and payment channel.
Is Square the cheapest credit card processor?
Square can be one of the cheapest options for a new or low-volume business because Square Free has no monthly subscription fee and includes payment and POS tools. It is not automatically the cheapest at higher processing volumes, where interchange-plus pricing or negotiated rates may result in lower total costs.
What is the cheapest credit card processor with no monthly fee?
Helcim, Square, Stripe, PayPal, and Adyen can all be used without a standard monthly processing subscription for certain setups. Helcim is my overall pick for businesses that want no monthly fee plus interchange-plus pricing, while Square and Stripe are easier starting points for many low-volume in-person and online businesses, respectively.
Is interchange-plus cheaper than flat-rate processing?
It can be, particularly as card volume increases, because the processor discloses its markup separately from the card network's interchange cost. Flat-rate pricing can still be more practical for lower-volume businesses because there is less variation and often no monthly account fee.
What is the cheapest credit card processing for high-volume businesses?
How do I calculate my credit card processing rate?
Divide all processing-related fees for the period by your total card sales and multiply by 100. For example, $300 in total fees on $10,000 of credit card sales equals a 3% effective processing rate. Use total fees rather than the advertised transaction rate so monthly and account charges are included.
Can you process credit cards without a fee?
The processing cost itself does not disappear. Some businesses use compliant surcharging programs to pass eligible credit card fees to customers, while others encourage lower-cost payment methods such as ACH or cash. Rules vary by payment type and jurisdiction, so check the requirements that apply to your business before adding a surcharge.