Frequently Asked Questions

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.

Should I choose interchange-plus or flat-rate pricing?

Flat-rate pricing (like Square's 2.6% + 10¢) is simpler but often more expensive for businesses processing over $10K/month. Interchange-plus pricing passes through the actual card network fees plus a fixed markup — typically saving 0.3-0.5% on each transaction. Switch to interchange-plus once you're consistently processing $10K+ monthly.

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.

How do Stripe, Square, and PayPal compare for small businesses?

Stripe excels for online-first businesses with developer resources — its API is best-in-class. Square is ideal for retail/in-person sales with its free POS hardware and simple setup. PayPal offers the widest buyer recognition but charges higher fees (3.49% + 49¢ for standard checkout). Choose based on where most of your sales happen.

What is PCI compliance and do I need it?

PCI DSS is a security standard for businesses that handle card data. All merchants accepting card payments must comply. If you use a hosted checkout (Stripe Checkout, Square), most requirements are handled for you — you just fill out a Self-Assessment Questionnaire annually. Non-compliance can result in monthly fines of $5-100K from your processor.

How do I prevent chargebacks?

Use clear billing descriptors so customers recognize charges, send order confirmations and tracking numbers, respond to disputes within 24 hours, implement 3D Secure for online transactions, and keep refund policies visible. A chargeback rate above 1% can result in your merchant account being flagged or terminated by processors.

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 much does Square charge per transaction?

Square charges 2.6% + $0.10 for in-person card swipes, dips, and taps; 3.5% + $0.15 for manually keyed transactions; and 2.9% + $0.30 for online payments. There are no monthly fees on the free plan. Paid plans (Square Plus at $29/month) reduce rates for high-volume sellers in categories like restaurants.

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 happens when a customer swipes a card?

Swiping triggers an authorization request: your POS sends card data to your payment processor, which routes it through the card network to the issuing bank. The issuing bank checks available credit or balance and returns an approval or decline code. The actual money movement happens in a separate batch settlement process at end of day.

What is interchange and who sets it?

Interchange is the fee paid to the customer's card-issuing bank on every transaction. Visa and Mastercard set interchange rates, which vary by card type, transaction type, and merchant category. Rewards cards and business cards carry higher interchange than basic debit. Interchange is the largest cost component of processing and typically ranges from 0.5% to 2.7%.

What is interchange-plus pricing?

Interchange-plus passes the exact interchange rate through to you, plus a fixed markup from your processor (e.g., interchange + 0.3% + $0.10). This is the most transparent pricing model because you see exactly what Visa/Mastercard charges versus what your processor keeps. It's usually best for businesses processing over $10,000 per month.

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 is tiered pricing and should I avoid it?

Tiered pricing sorts transactions into "qualified," "mid-qualified," and "non-qualified" buckets with different rates. The processor decides which tier each transaction falls into, often pushing rewards cards into the most expensive tier. Most payment experts recommend avoiding tiered pricing because it lacks transparency and typically costs more than interchange-plus.

What does "2.9% + $0.30" actually mean?

On a $100 sale, you pay $2.90 (2.9%) plus $0.30 flat, keeping $96.80. The percentage covers interchange and processor margin; the fixed $0.30 covers authorization costs. The flat fee makes this proportionally expensive for small transactions — on a $5 sale you pay roughly 9% effective rate — so it favors higher average ticket businesses.

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.

Is Square good for restaurants?

Square for Restaurants offers tableside ordering, menu management, floor plan layout, and kitchen display integration. The free plan works for simple cafes; the $60/month plan adds multi-location support and advanced reporting. Toast is a stronger choice if you need complex modifier trees or deep kitchen workflow integration with dedicated restaurant support.

Is Square good for retail businesses?

Square for Retail includes inventory tracking with barcode support, purchase orders, vendor management, and customer loyalty — a solid all-in-one for brick-and-mortar retail. The free tier handles basic needs; the $60/month Plus plan adds advanced inventory management and cost-of-goods tracking essential for multi-SKU retailers.

Square vs Stripe: which is better for my business?

Square is designed for in-person businesses — free hardware, a complete POS app, and no monthly fees. Stripe is built for online and developer-driven businesses, with powerful APIs, subscription billing, and global payment support. If you primarily sell in person, Square wins on simplicity. If you're building an e-commerce site or SaaS, Stripe is the right platform.

What hardware does Square offer?

Square offers four main hardware options: the free magstripe reader, the $49 contactless reader (NFC + chip), the $149 Square Terminal (standalone device with receipt printer), and the $799 Square Register (full countertop system). Square also sells compatible accessories like cash drawers and kitchen printers that integrate directly with its POS software.

How does Stripe work for e-commerce?

Stripe is a developer-first payment platform for accepting payments on websites and apps. You integrate via API or pre-built tools like Stripe Checkout. It handles cards, Apple Pay, Google Pay, ACH, and 135+ local payment methods globally. Stripe's strength is flexibility — you can build virtually any payment flow, from one-click checkout to complex marketplace disbursements.

What is Stripe Connect and who should use it?

Stripe Connect lets platforms and marketplaces route payments to third-party sellers or service providers. If you're building a marketplace where vendors receive payouts, Connect handles split payments, seller onboarding, KYC, and compliance. It's complex to set up but extremely powerful — Lyft, Shopify, and DoorDash all use Stripe Connect.

Stripe vs Square for SaaS businesses?

Stripe is the clear choice for SaaS. It has native subscription billing, usage-based pricing, trial periods, proration, and a customer portal for self-service plan changes. Square has basic recurring payments but lacks the billing engine sophistication SaaS products need. Stripe also handles B2B invoicing and ACH bank debit natively.

What is Stripe Atlas?

Stripe Atlas helps founders incorporate a US company (Delaware C-Corp), get a US bank account, and set up Stripe payments — all from anywhere in the world. It costs $500 one-time and is popular with international founders seeking US company credibility. Atlas also provides legal document templates and access to AWS credits and other partner perks.

What is a PayPal business account?

A PayPal Business account lets you accept payments via PayPal, Venmo, credit cards, and debit cards under a business name. It includes invoicing, a virtual terminal for phone orders, and integration with major e-commerce platforms. Unlike personal accounts, business accounts support multiple users, custom permissions, and detailed business analytics.

How much does PayPal charge businesses?

PayPal charges 3.49% + $0.49 for standard checkout and 2.99% + $0.49 for PayPal/Venmo button transactions. In-person PayPal Zettle transactions cost 2.29% + $0.09. There are no monthly fees for standard accounts. PayPal adds value when customers prefer paying with their PayPal balance, especially internationally and for older demographics.

PayPal vs Stripe: which should I use for checkout?

Stripe generally wins on developer experience, pricing transparency, and checkout conversion — especially for new customers. PayPal wins when your audience includes existing PayPal users who prefer not to re-enter card details, or when selling internationally to markets with high PayPal trust. Many businesses use both as complementary options.

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 are Shopify transaction fees?

If you use Shopify Payments, there are no transaction fees — only the processing rate. If you use a third-party processor like Stripe or PayPal, Shopify charges 2% (Basic), 1% (Shopify), or 0.5% (Advanced) on top of your processor fees. On higher-volume stores, upgrading your Shopify plan to reduce the transaction fee often pays for itself.

What is a chargeback?

A chargeback occurs when a customer disputes a charge with their bank instead of contacting you for a refund. The bank reverses the transaction, pulling funds from your account, and you must submit evidence to contest it. Chargebacks carry a $15-$100 fee per incident and can result in account termination if your ratio exceeds network thresholds.

How do I fight a chargeback?

Submit a rebuttal letter with evidence: proof of delivery, signed receipts, customer communications, IP logs, and your refund policy. Most processors give 7-30 days to respond. Merchants win roughly 40% of contested chargebacks. Strong contemporaneous documentation — especially delivery confirmations and customer acceptance of terms — is your best defense.

What is a chargeback ratio and what happens if it is too high?

Your chargeback ratio is chargebacks divided by total transactions in a month. Visa and Mastercard set thresholds at 1% (Visa Early Warning triggers at 0.65%). Exceeding these thresholds puts you in a monitoring program with monthly fines of $25,000-$100,000. At 2%, processors can terminate your account entirely.

How can I prevent chargebacks?

Use clear billing descriptors customers recognize, send order confirmations and delivery notifications, make refunds easy to obtain, require signatures for high-value deliveries, and use AVS/CVV verification at checkout. Address customer service issues proactively — a quick refund usually costs less than a chargeback fee plus the time spent fighting it.

What is PCI DSS compliance?

PCI DSS (Payment Card Industry Data Security Standard) is a set of security requirements for any business that stores, processes, or transmits cardholder data. It covers network security, encryption, access controls, and regular security testing. Non-compliance can result in fines of $5,000-$100,000 per month and liability for all fraud losses in the event of a breach.

What does a small business need to do for PCI compliance?

Most small businesses qualify for the simplest path by never touching raw card data — using a hosted payment page or processor-managed terminals. This limits you to SAQ A (22 questions) or SAQ B (41 questions), plus an annual self-assessment and quarterly vulnerability scan. Using Stripe or Square's hosted checkout handles the majority of compliance requirements for you.

What are PCI SAQ types?

SAQ types depend on how you accept payments. SAQ A covers merchants using fully outsourced card processing via hosted checkout. SAQ B covers standalone terminals with no electronic card storage. SAQ C covers payment application systems connected to the internet. SAQ D is the most complex, for merchants who store cardholder data. Most small businesses using modern processors qualify for SAQ A.

What is the cost of PCI non-compliance?

Card networks can fine acquiring banks $5,000-$100,000 per month for non-compliant merchants, and those fines get passed to you. If a breach occurs during non-compliance, you're liable for fraud losses, forensic investigation costs, and card reissuance fees — potentially millions. Most processors also charge a monthly non-compliance fee of $20-$50 until you certify.

What makes a merchant high-risk?

Processors classify merchants as high-risk based on industry (adult content, travel, firearms, supplements, CBD), business model (subscription billing, high average ticket, card-not-present), geographic location, or owner credit history. High chargeback industries and regulated-product sellers are automatically high-risk regardless of their individual processing track record.

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.

What rates do high-risk merchants pay?

High-risk merchants typically pay 3.5%-5% plus $0.25-$0.50 per transaction, compared to 1.5%-3% for standard merchants. Processors also hold a rolling reserve of 5-10% of monthly volume for 6-12 months as a cushion against chargebacks. Setup fees and monthly minimums are also common. Rates improve over time as you build a clean processing history.

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 are currency conversion fees?

Currency conversion fees apply when a customer pays in a foreign currency and you receive funds in your home currency. Stripe charges 1.5% for conversion (2% if a cross-border fee also applies). PayPal charges 3-4% above the base exchange rate. These fees add up significantly on international sales, which is why some merchants open local-currency accounts in their top markets.

What are cross-border transaction fees?

Cross-border fees apply when the customer's card is issued in a different country than your processing location. Visa and Mastercard charge 0.4%-1.0% in additional interchange. Your processor may add a separate cross-border fee on top. A US merchant accepting a UK Visa card might pay an extra 1.8% between the two fees — important to factor into international pricing.

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.

Square vs Clover vs Toast vs Lightspeed: how do they compare?

Square excels for simplicity and low cost. Clover offers more hardware customization and a larger app marketplace. Toast is purpose-built for restaurants with the deepest kitchen workflow features. Lightspeed targets mid-size retail and restaurants needing advanced inventory and multi-location management. Your choice depends on industry, volume, and how much you value ecosystem depth over simplicity.

What is the difference between restaurant and retail POS systems?

Restaurant POS systems are built around table management, coursing, kitchen display integration, tip handling, and split-check functionality. Retail POS systems prioritize inventory management, barcode scanning, purchase orders, and loyalty programs. Using a retail system for a restaurant (or vice versa) creates significant workflow friction — choosing the right category matters most.

What is a cloud-based POS system?

A cloud-based POS stores all data on remote servers, allowing you to access sales reports, inventory, and customer data from any device with internet access. Updates happen automatically without on-site servers. The tradeoff is reliance on connectivity — most cloud POS systems include offline modes that queue transactions locally and sync when internet is restored.

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.

How do ACH fees compare to credit card fees?

ACH processing typically costs $0.20-$1.50 per transaction flat, making it far cheaper than card processing for large transactions. On a $5,000 B2B payment, ACH costs under $1 while a card would cost $145+. The tradeoffs: ACH takes 1-3 days to settle (vs instant card authorization), and returns (failed debits) can take days to discover.

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.

What is the difference between next-day and same-day ACH?

Standard ACH settles in 1-3 business days. Same-day ACH (available since 2016) settles the same business day if submitted before 2:45 PM ET, for a $0.052 per-transaction surcharge. Next-day ACH settles the following business day. For most businesses, standard ACH is fine — same-day is useful for urgent payroll or time-sensitive vendor payments.

What are subscription billing platforms?

Subscription billing platforms (Stripe Billing, Recurly, Chargebee, Zuora) manage recurring charges, plan upgrades and downgrades, proration, and customer self-service portals. They integrate with your processor to retry failed payments, send dunning emails, and manage revenue recognition. For SaaS businesses, a dedicated billing platform reduces significant engineering complexity.

What is dunning management?

Dunning management is the automated process of recovering failed subscription payments through smart retries and customer communications. A good dunning sequence retries the card at calculated intervals (e.g., days 3, 7, 14), sends email reminders to update payment info, and escalates to service suspension only as a last resort. Effective dunning recovers 20-40% of failed payments.

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.

How do I get a merchant account?

Apply through a payment processor or acquiring bank with your business license, EIN, bank account details, website, and product descriptions. Payment facilitators like Stripe approve most businesses instantly. Traditional merchant accounts take 2-7 days. High-risk businesses may face 2-4 weeks of underwriting and additional documentation requirements before approval.

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 a rolling reserve?

A rolling reserve is a percentage of your processing volume (typically 5-10%) held back by the processor for a set period (usually 6 months) as protection against chargebacks and fraud. Common for new businesses and high-risk merchants. After the reserve period, held funds release on a rolling basis as transactions age past the chargeback window.

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.

How long does it take to receive funds after a transaction?

Most processors deposit funds within 1-2 business days. Stripe deposits on a rolling 2-day basis; Square deposits next business day (or instantly for a 1.5% fee). New accounts may face a 7-day hold while processors assess risk. Once you establish a clean processing history, funding speed typically improves and holds become less common.

What is a virtual terminal?

A virtual terminal is a browser-based interface where you manually key in customer card details — useful for phone orders, mail orders, and in-person sales without hardware. Most processors include one at no extra cost. Virtual terminal transactions are card-not-present and carry higher rates (typically +0.5-1%) than swiped transactions due to elevated fraud risk.

What is 3D Secure and does it reduce chargebacks?

3D Secure (3DS) adds an authentication step — one-time password or biometric confirmation — for online purchases. It shifts chargeback liability for fraudulent disputes from you to the card issuer. 3DS2 (the current version) minimizes checkout friction by authenticating most transactions silently in the background, only prompting the customer when elevated risk is detected.

What is AVS and CVV verification?

AVS (Address Verification Service) checks whether the billing address entered at checkout matches the card issuer's records. CVV is the 3-4 digit security code on the card. Using both for card-not-present transactions significantly reduces fraud. Processors can automatically decline mismatches. Passing both checks doesn't guarantee legitimacy, but failing either dramatically increases fraud probability.

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.

What is Stripe Radar fraud detection?

Stripe Radar is machine learning fraud detection included free with all Stripe accounts. It analyzes transaction patterns across millions of Stripe merchants to score each payment's fraud risk in real time. You can set custom rules — blocking all transactions from specific countries or above certain amounts — to supplement Radar's automatic decisions. Radar+ adds enhanced custom scoring for $0.02 per screened transaction.