Payment Processor Comparison

What is the difference between a payment processor and a payment gateway?

A payment gateway is the software that securely captures and encrypts card data at checkout (like Stripe or Braintree). A payment processor handles the actual movement of funds between the customer's bank and your merchant account (like First Data or TSYS). Many modern providers like Stripe and Square combine both into a single service.

How can I reduce my payment processing fees?

Key strategies: negotiate rates after reaching $50K+/month in volume, encourage debit card and ACH payments (lower interchange), implement address verification to qualify for lower rates, avoid keyed-in transactions when possible, and review your monthly statement for hidden fees like PCI non-compliance charges or batch processing fees.

Can I accept payments online without a website?

Yes. Payment links (Stripe, Square, PayPal) let you send a checkout URL via email or text. Invoice tools from most processors allow recurring billing. Social selling platforms like Instagram and Facebook Shops have built-in checkout. For the simplest setup, Square's payment links are free to create and charge standard processing fees.

Should my business accept ACH payments?

ACH costs 0.5-1% per transaction (often capped at $5-10), making it far cheaper than cards for large transactions. Settlement takes 3-5 business days vs. 1-2 for cards. It's ideal for B2B invoices, subscriptions, rent payments, and any recurring charges over $100. Stripe, Square, and most processors now support ACH alongside cards.

Why is my payment processor holding my funds?

Processors hold funds when they detect risk: sudden volume spikes, high-ticket transactions, new accounts with no processing history, or elevated chargeback rates. To minimize holds, gradually increase volume, maintain consistent processing patterns, keep chargeback rates below 0.5%, and proactively provide documentation when processing large or unusual transactions.

How do I accept international payments?

Most major processors (Stripe, PayPal, Adyen) support multi-currency checkout that converts automatically. Key considerations: cross-border fees add 1-2% per transaction, you'll need to handle VAT/GST for EU/AU customers, and some payment methods are region-specific (iDEAL in Netherlands, PIX in Brazil). Stripe supports 135+ currencies and 40+ local payment methods.

How does payment processing actually work?

When a customer swipes or taps their card, the transaction travels from the merchant's terminal to their acquiring bank, through the card network (Visa/Mastercard), to the customer's issuing bank for approval, then back. The whole process takes 1-3 seconds. Funds typically settle to your bank account within 1-2 business days.

What is flat-rate pricing for payment processing?

Flat-rate pricing charges one fixed percentage on every transaction regardless of card type — Stripe and Square use this model. It's simple and predictable but can be more expensive than interchange-plus for high-volume businesses. The simplicity is worth it for small businesses that prioritize ease over optimizing every basis point.

What are assessment fees in payment processing?

Assessment fees are charged by the card networks (Visa, Mastercard, Amex, Discover) directly to processors, who pass them to merchants. They're small — typically 0.13% to 0.15% — but unavoidable on every transaction. Unlike interchange, assessment fees are the same regardless of your processor and are included in flat-rate pricing but itemized on interchange-plus statements.

What is Shopify Payments?

Shopify Payments is Shopify's built-in processor, powered by Stripe behind the scenes. It eliminates the 0.5%-2% third-party transaction fee Shopify charges when using external processors. Rates start at 2.9% + $0.30 on Basic and drop to 2.4% + $0.30 on Advanced. It also enables Shop Pay accelerated checkout, which significantly boosts conversion rates.

Shopify Payments vs Stripe: what is the difference?

Shopify Payments IS Stripe under the hood, integrated directly into Shopify with seamless dashboard unification and no Shopify transaction fees. If you're on Shopify, Payments is almost always the better choice — same Stripe infrastructure without the 0.5%-2% extra transaction fee. Use Stripe directly only if you need features Shopify Payments doesn't expose.

What payment processors work with high-risk merchants?

Specialized high-risk processors include PaymentCloud, Durango Merchant Services, eMerchantBroker (EMB), and SMB Global. These work with industries that mainstream processors like Stripe decline. They typically require a longer application process, rolling reserves of 5-10% of monthly volume held for 6 months, and higher processing rates.

How do I accept international payments?

Use a processor with global currency support like Stripe, PayPal, or Adyen. Enable multi-currency checkout so customers see prices in their local currency. Consider VAT/GST collection requirements for digital goods, local payment method preferences (iDEAL in Netherlands, Boleto in Brazil), and currency conversion fees that reduce net revenue on cross-border sales.

What is the best payment processor for international sales?

Stripe leads for international e-commerce with support for 135+ currencies and 45+ countries. Adyen is preferred by larger enterprises processing in multiple regions. For Asia-Pacific markets, consider processors with native Alipay and WeChat Pay support. PayPal adds trust in markets where consumers are reluctant to enter card details with unfamiliar merchants.

Can I accept payments without a merchant account?

Yes — payment facilitators like Stripe, Square, and PayPal let you start accepting payments immediately without a traditional merchant account, operating under their master merchant ID. The tradeoffs are less account stability and slightly less favorable rates at high volume. For most small businesses, the simplicity and instant activation outweigh these considerations.

What is ACH payment processing?

ACH (Automated Clearing House) is the US electronic network for direct bank-to-bank transfers — the same network used for direct deposit and bill pay. For businesses, ACH lets you debit customer bank accounts directly at significantly lower cost than card processing (typically $0.25-$1.50 flat vs 2-3% for cards), though it takes 1-3 business days to settle.

When should I offer ACH payments to customers?

Offer ACH for large B2B transactions where card fees would be prohibitive, for recurring subscriptions where customers are willing to set up bank debit once, and for invoices over $500 where the fee savings are meaningful. ACH works best for trusted, repeat customers — new customers may be reluctant to share bank account details without an established relationship.

How should I handle failed subscription payments?

Use a smart retry schedule (not immediate retries, which often fail again), automated emails prompting customers to update their card, an easy self-service payment update link, and a grace period before suspending service. Stripe Billing's Smart Retries uses machine learning to pick optimal retry times and typically recovers significantly more revenue than fixed schedules.

What is a direct processor vs payment facilitator vs ISO?

A direct processor (First Data, Worldpay) processes payments through card networks with your own merchant ID. A payment facilitator (PayFac) like Stripe or Square aggregates merchants under one master ID — faster setup but with more account-termination risk. An ISO (Independent Sales Organization) resells processing from a direct processor with added services and dedicated support.

What does a payment processing statement show?

Your monthly statement shows total volume, transaction count, effective rate, interchange fees by card type, assessment fees, processor markup, monthly fees, and any chargebacks or adjustments. Reviewing statements helps you identify overcharges, determine whether interchange-plus would save money, and monitor whether your chargeback ratio is trending upward.

What is the difference between a payment gateway and payment processor?

A payment gateway captures and securely transmits card data from your checkout to the processor. A payment processor is the company that moves money between banks. Modern providers like Stripe combine both into one service. Legacy setups use a separate gateway (e.g., Authorize.net) plus a separate processor (your bank), adding cost and integration complexity.

What is tokenization in payment processing?

Tokenization replaces sensitive card data with a random token useless to hackers. When a customer saves their card for future purchases, the processor stores the real card data and returns a token. You store only the token — so a breach on your systems exposes nothing valuable. Tokenization is now the industry standard and a core PCI compliance mechanism.

What is a processor fund hold and why does it happen?

Processors place holds on your funds when they detect unusual activity: a sudden volume spike, rising chargeback rate, or products deemed high-risk. Holds can last 30-180 days. Square and PayPal are known for holds on newer accounts. To minimize risk, maintain consistent monthly volume, keep chargebacks low, and ensure your account description accurately reflects what you sell.

What are the best payment processors for small businesses in 2025?

Square is best for in-person retail and restaurants with no monthly fees. Stripe is best for online businesses and developers. PayPal adds value when your customers prefer PayPal checkout. Helcim offers interchange-plus pricing with no monthly fee, making it cost-effective for businesses processing $5,000+/month. The best choice depends on your sales channel, volume, and technical needs.

What is Level 2 and Level 3 payment processing data?

Level 2 data adds purchase order numbers and tax amounts to B2B transactions. Level 3 adds full line-item details: product codes, quantities, and unit prices. Submitting Level 2/3 data on corporate card transactions can reduce interchange by 0.5-1.5%, since card issuers provide better expense reporting to cardholders. This saves thousands monthly for businesses with high B2B card volume.

What is a payment processor reserve account?

A reserve account holds funds set aside by your processor — as a fixed amount, a rolling percentage of monthly volume, or a capped rolling reserve — to cover potential chargebacks, refunds, and fees. Processors use reserves with new businesses, high-risk industries, and merchants with prior fund holds. Reserve requirements should be clearly stated and negotiated in your merchant agreement.

How do I switch payment processors without disrupting my business?

Plan the switch carefully: migrate saved customer payment tokens to your new processor first, run both processors in parallel during transition, update your checkout integration, then cut over fully. Stripe and Braintree offer migration tools to transfer vaulted cards without requiring customers to re-enter details. Allow 4-6 weeks for a smooth migration to avoid revenue disruption.