Top 5 Cheapest Credit Card Processing Services [2026]

Processing fees might not seem like much, but if the margins are low, they add up to a lot. If you’re making six figures a year, a small percentage will make you hand over thousands of dollars.

Did you know? Most small businesses pay between 1.5% and 3.5% in credit card processing fees for every transaction.

With dozens of payment processors available, finding the most cost-effective option can be challenging. The lowest advertised rate is not always the cheapest in practice, so it’s important to evaluate the total cost alongside the features and support your business requires.

This guide breaks down the five cheapest credit card processing services in 2026, what they actually cost once you account for hidden fees, and which one fits your business based on volume and sales channel.

The 5 Cheapest Credit Card Processors at a Glance

Processor	Best For	In-Person Rate	Online Rate	Monthly Fee	Standout Feature
Square	Startups & small businesses	2.6% + $0.15	3.3% + $0.30 (2.9% + $0.30 on Plus/Premium)	$0 / $49 / $149	Free plan, free card reader
Helcim	Growing, cost-conscious businesses	Interchange + 0.40% + $0.08	Interchange + 0.50% + $0.25	$0	Automatic volume discounts
Stripe	eCommerce & developers	2.7% + $0.05	2.9% + $0.30	$0	135+ currencies, deep API
Payment Depot	Higher-volume merchants	Interchange + $0.07–$0.15	Interchange + $0.07–$0.15	$79–$199	Wholesale/membership pricing
PayPal (Zettle/POS)	Micro-businesses & side hustles	2.29% + $0.09	3.49% + $0.09 (keyed)	$0	$29 card reader, no contract

*Rates above reflect pricing at the time of writing. Always confirm current rates on the provider’s own pricing page before signing up.

How We Chose These Processors (Methodology)

We evaluated each processor on: real transaction costs across in-person, online, and keyed-in scenarios; contract terms and cancellation fees; hardware costs; customer support; integration with common eCommerce and WordPress setups; and hidden fees, if any.

We excluded processors that rely primarily on tiered pricing – a model that hides real costs behind categories. If a public pricing page doesn’t clearly disclose it’s tiered, that’s a red flag.

We’re not affiliated with any of the processors covered here, and the list isn’t ranked in any particular order.

How Credit Card Processing Fees Actually Work

Every card transaction stacks three layers of cost:

1. Interchange fees: Visa, Mastercard, and other card networks set these fees, and the customer’s issuing bank collects them. This rate remains non-negotiable and identical no matter which processor you use.
2. Assessment fees: The card networks themselves charge these small fees, which also remain non-negotiable.
3. Processor markup: This layer varies. The processor makes its money here, and shopping around pays off.

Processors package these three layers into one of a few pricing models:

• Flat-rate (Square, Stripe, PayPal): The processor charges one fixed rate no matter the card type. This model stays simple and predictable, but you often overpay on lower-cost debit transactions to subsidize higher-cost rewards cards.
• Interchange-plus (Helcim): The processor passes interchange and assessment fees through at cost and adds a small transparent markup on top. This model usually costs less at moderate-to-high volume, but the total varies transaction to transaction.
• Membership/subscription (Payment Depot): A flat monthly fee buys you interchange-plus pricing with a very small per-transaction markup instead of a percentage markup.
• Tiered: The processor bundles transactions into different buckets with different rates. Avoid this model.

Key Features to Look for in Cheapest Credit Card Processing Services

Most payment processing services entice you by concealing extra charges behind industry-specific jargon and complicated terminology. This section lists all the factors you should evaluate while choosing a merchant services provider.

• Transparent Pricing: Look for providers that offer clear, upfront pricing with no hidden fees. The industry typically uses three payment models: flat-rate, interchange-plus, or tiered pricing.
• Transaction Fees: Compare the per-transaction rates across different services. Cheaper options typically offer lower percentage rates and fixed fees.
• Monthly Fees: Ensure the provider charges minimal or no monthly fees and keeps you out of long-term contracts with pesky cancellation charges. Avoid services that force you to sign lengthy contracts.
• Security and Compliance: The processor must maintain PCI DSS compliance and offer security features like encryption, tokenization, and chargeback protection to safeguard sensitive customer data.
• Processing Speed: Fast fund transfers improve cash flow. Look for services with quick payout times, ideally within 1-2 business days.
• Hardware and Software Compatibility: Ensure the processor supports your existing point of sale (POS) system or offers cost-effective credit card terminal options. Compatibility with eCommerce platforms, such as Shopify and WooCommerce, also remains essential for online businesses.
• Customer Support: Reliable customer service with 24/7 availability proves crucial during technical issues or disputes.
• Scalability and Flexibility: Choose a service that grows with your business and offers additional features like recurring billing, virtual terminal access, and mobile payment options.

The 5 Cheapest Credit Card Processing Services

Let’s compare the five best and most popular credit card processing services and find out the best one. However, please note that the list below is not in order, and we are not affiliated with any service. 

#1: Square

Square remains one of the cheapest credit card processing services for businesses that are just getting off the ground.

It gives new business owners nearly everything they need to start selling in one account: a POS system, a free mobile card reader, marketing tools, appointment scheduling, invoicing, and even access to business loans through Square Capital.

Read more about Square: What is Square?

This all-in-one approach is what makes Square one of the cheapest credit card processing services for small and medium-sized businesses, since it replaces several paid tools with a single flat-rate account.

For example, Square’s free plan charges just 2.5% + $0.10 per transaction, with no monthly fee at all. Businesses that outgrow the free plan can move to the Plus plan ($29/month + processing) or a custom Premium plan with negotiated rates.

This makes Square credit card processing a strong pick for businesses that only want to pay when they actually make a sale.

Key Features:

• Free plan available: No monthly fee, pay only per transaction.
• All-in-one ecosystem: POS, invoicing, scheduling, and loans in one account.
• Free mobile card reader: Start accepting payments with minimal setup cost.
• Square Capital: Built-in access to business financing.
• Transparent flat-rate pricing: No hidden markups on standard transactions.

Pricing: 

Square’s free plan costs 2.5% + $0.10 per transaction. Paid plans start at $29/month plus processing for businesses that need more advanced tools.

Best for: 

Square is best for new and growing businesses that want a low-cost, all-in-one payment and business management solution.

#2: Zeetle by PayPal

PayPal backs Zettle, a POS service from one of the world’s largest digital payment providers, and it stands as one of the cheapest credit card processing services for businesses that want to avoid monthly fees entirely.

Like Square, Zettle charges no monthly subscription and instead runs on a simple per-transaction rate, which keeps costs predictable for smaller merchants who process lower volumes.

This makes Zettle an excellent choice for businesses testing new sales channels, since there’s no ongoing cost if transaction volume stays low.

For example, standard and QR code transactions start at 2.29% + $0.09, while keyed-in transactions run higher at 3.49% + $0.09. Invoicing costs more: 3.49% + $0.49 for PayPal payments and 2.99% + $0.49 for cards. The one-time POS hardware costs $29 + tax, with extra readers priced at $79 + tax each.

This makes Zettle a solid option for small businesses that mostly take standard card-present or QR payments.

Key Features:

• No monthly fees: Pure per-transaction pricing.
• Backed by PayPal: Access to a trusted global payments network.
• QR code payments: Same low rate as standard transactions.
• Affordable hardware: One-time POS cost with optional extra readers.
• Multi-location support: Add readers as the business expands.

Pricing:

Standard and QR transactions cost 2.29% + $0.09; keyed-in transactions cost 3.49% + $0.09; invoicing runs 3.49% + $0.49 (PayPal) or 2.99% + $0.49 (card). POS hardware costs $29 + tax, with extra readers at $79 + tax each.

Best for:

Zettle is best for small businesses and multi-location retailers that want low-cost, no-commitment card processing.

Also Read: Square vs PayPal: Which is Right for Your Business?

#3: Stripe

Stripe is one of the cheapest credit card processing services for online-first businesses, thanks to its flat, predictable per-transaction pricing and zero monthly fees.

It’s especially popular with eCommerce businesses because of its developer-friendly tools and native integrations with platforms like Shopify, WooCommerce, and custom-built websites.

This makes Stripe one of the cheapest credit card processing services for businesses that want to only pay for what they actually process, without paying for features they don’t use.

For example, Stripe charges a flat 2.9% + $0.30 per card transaction, with an added 1% fee for international cards. In-person transactions through its terminal cost 2.7% + $0.05, plus 1.5% for international cards or 1% for currency conversion. Wire transfers, however, run as high as $8 per payment.

This makes Stripe credit card processing one of the strongest choices for online businesses focused on keeping transaction costs low and predictable.

Key Features:

• No monthly fees: Flat per-transaction pricing only.
• Developer-friendly tools: Strong API and platform integrations.
• eCommerce-ready: Built for Shopify, WooCommerce, and custom sites.
• In-person terminal option: Competitive card-present rates.
• Global reach: Support for international cards and currencies.

Pricing: 

Online transactions cost 2.9% + $0.30 (plus 1% for international cards). In-person terminal transactions cost 2.7% + $0.05, and wire transfers cost up to $8 per payment.

Best for: 

Stripe is best for online and eCommerce businesses that want low, predictable per-transaction costs with no monthly fees.

#4: Helcim

Helcim is one of the cheapest credit card processing services for businesses that want transparent, interchange-plus pricing instead of a flat markup.

Its interchange-plus model often works out cheaper than flat-rate competitors, since businesses pay closer to the true cost of processing rather than a bundled margin, and there are no long-term contracts to worry about.

This makes Helcim one of the cheapest credit card processing services for small businesses that process a steady volume and want costs that scale down as volume grows.

For example, Helcim’s rates start at 1.92% + $0.08 for in-person payments and 2.38% + $0.25 for online transactions, with no monthly fees, setup charges, or cancellation penalties. Keyed transactions cost 2.51% + $0.25, ACH payments cost 0.5% + $0.25, and every transaction is capped at a maximum fee of $6.

This makes Helcim credit card processing an appealing option for small businesses that want low costs without sacrificing transparency.

Key Features:

• Interchange-plus pricing: Lower effective rates than flat-rate models.
• No contracts: No setup fees or cancellation penalties.
• Capped transaction fees: Maximum of $6 per transaction.
• ACH support: Low-cost bank transfer processing.
• Volume-based savings: Rates improve as processing volume grows.

Pricing: 

In-person rates start at 1.92% + $0.08 and online rates at 2.38% + $0.25. Keyed transactions cost 2.51% + $0.25, ACH payments cost 0.5% + $0.25, and hardware ranges from $109 (card reader) to $349 (Smart terminal).

Best for: 

Helcim is best for small businesses that want transparent, low-cost processing without long-term commitments.

#5: Payment Depot

Payment Depot is one of the cheapest credit card processing services for businesses with higher transaction volumes, thanks to its membership-based pricing model.

Instead of charging a percentage markup on every sale, Payment Depot charges direct interchange rates plus a small flat fee, which can add up to significant savings for businesses processing large transaction volumes.

This makes Payment Depot one of the cheapest credit card processing services for businesses that would otherwise pay steep percentage-based fees under a traditional flat-rate plan.

For example, the Starter plan costs $59/month + $0.15 per transaction and includes a free POS system, ACH processing, and an analytics dashboard. The Starter Plus plan costs $79/month + $0.10 per transaction and adds digital invoicing and QuickBooks integration. The Growth plan costs $99/month + $0.7 per transaction and adds deeper analytics and automatic card-expiration updates.

This makes Payment Depot credit card processing one of the best-value options for businesses with consistent, higher-volume sales.

Key Features:

• Membership pricing: Direct interchange rates with no markup.
• Tiered plans: Starter, Starter Plus, and Growth options.
• Free POS system: Included with the Starter plan.
• QuickBooks integration: Available on higher-tier plans.
• Detailed analytics dashboard: Upgrades with each plan tier.

Pricing: 

Starter costs $59/month + $0.15 per transaction; Starter Plus costs $79/month + $0.10 per transaction; Growth costs $99/month + $0.7 per transaction.

Best for: 

Payment Depot is best for higher-volume businesses that want to minimize per-transaction costs through a membership model.

Pricing Model Comparison: Which Saves You More?

• Flat-rate (Square, Stripe, PayPal): predictable, easiest to understand, best for low-to-moderate volume where simplicity outweighs marginal savings.
• Interchange-plus (Helcim): transparent and scales well as volume grows, since you’re not overpaying to subsidize a blended average rate.
• Membership/subscription (Payment Depot): usually the cheapest option once you’re consistently processing well above $20,000/month, but the fixed fee makes it a bad deal below that.
• Tiered: avoid the “qualified/non-qualified” bucketing to obscure your real rate, not simplify billing.

As a rough rule of thumb: at low volume, flat-rate wins on simplicity. Somewhere in the $10K–$20K/month range, interchange-plus processors like Helcim typically start beating flat-rate on cost. Past roughly $50K/month, a membership model like Payment Depot usually pulls ahead of both.

Final Verdict: Which Cheapest Credit Card Processing Service Should You Choose?

Choosing the right payment processor isn’t always easy, especially when several providers offer excellent value. The best choice ultimately depends on your business needs, sales volume, and preferred features.

• Choose Square if you want an easy-to-use, all-in-one payment solution with no monthly fees or long-term commitment.
• Choose Helcim if you value transparent interchange-plus pricing and want to maximize long-term savings as your business grows.
• Choose Stripe if you primarily sell online, especially to international customers, and need powerful APIs and developer-friendly tools.
• Choose Payment Depot if you process more than $20,000 per month and want to reduce costs by avoiding high percentage-based processing fees.
• Choose PayPal (Zettle) if you’re just getting started and want a familiar, trusted payment solution with minimal setup and no long-term commitment.

No matter which payment processor you choose, integrating it with your WordPress website proves simple and hassle-free.

With WP Easy Pay, connecting Square to your WordPress site remains quick and effortless. Start accepting secure online payments in minutes with a seamless integration that serves businesses of all sizes.

Frequently Asked Questions