What are credit card processing fees
Credit card processing fees are what a business pays to accept a card payment, typically 1.5%–3.5% of the transaction plus a fixed per-item fee. They cover three separate charges: interchange to the issuing bank, assessments to the card network, and your processor's markup.
The range is wide because credit card processing fees aren't one charge. They're three, levied by three different parties, and only one is set by the company sending your statement.
Components of credit card processing fees
1. Interchange fees
Interchange is the largest share of credit card processing fees and goes to the bank that issued your customer's card. The network sets the rate, the issuer collects it. If a customer pays with a Chase Visa card, Visa publishes the rate and Chase receives the fee.
Interchange varies by card type, transaction method, and merchant category code. Visa and Mastercard update their schedules twice a year, typically Apr and Oct.
[Table:1]
Visa USA Interchange Reimbursement Fees, effective Apr 18, 2026. Mastercard 2026–2027 US Region Interchange Programs and Rates, effective Apr 17, 2026.
In 2025, merchants paid a weighted average of 2.36% on Visa and Mastercard credit card transactions, up from 2.35% in 2024.
Did you know: submitting Level 2 and Level 3 data qualifies commercial card transactions for lower interchange. That means purchase order numbers, tax amounts, and line-item detail on the transaction. On large B2B tickets this trick saves more credit card transaction fees than switching processors.
2. Assessment fees
Assessment fees go to the card network rather than the issuing bank. They're the smallest slice of credit card processing fees, and you can't negotiate them. Every processor pays the same rate on the same transaction.
No network publishes its assessment fees. They reach you through your processor's fee schedule, which is the only place you'll see the exact figures. Check your statement, and ask your processor if the line item isn't broken out.
Discover and American Express publish neither number. Both are the network and the issuer at once, so there's no separate interchange rate to look up. Discover's schedule is restricted to acquiring banks and isn't published to merchants. Your Amex rate is set by your processor under OptBlue rather than by Amex. For both networks, your own statement is the only source you have.
3. Payment processor markup
The markup is the only part of credit card processing fees you have leverage over. It comes in four models:
- Tiered pricing sorts transactions into rate categories. Costs are hard to forecast
- Flat-rate pricing charges a fixed percentage plus a per-item fee. Simple, and it suits lower-volume businesses
- Interchange-plus pricing passes through actual interchange plus a stated markup, so you see what you're paying
- Subscription pricing trades a monthly fee for lower transaction-level markups
Remember, the right model for your business is the one that matches your ticket size, volume, channel, and card mix, not the one with the lowest headline rate.
How to calculate your effective rate
Your advertised rate does not show your full monthly cost. Your effective rate is what you actually pay in credit card processing fees, and it's the only number worth tracking.
Effective rate = total monthly processing fees ÷ total monthly card sales
Say you ran USD $18,400 in card sales last month and your statement shows USD $532 in credit card processing fees. Divide 532 by 18,400: your effective rate is 2.89%.
Run it every six months, and after any month where your channel mix shifts. The number moves even when your contract doesn't, because it tracks the cards your customers happen to present. A quarter of premium rewards cards instead of debit lifts your credit card processing fees without a single line of your agreement changing.
On a flat-rate plan, run your numbers through our Stripe fee calculator first. Most businesses are surprised by the gap between the rate they were quoted and the rate they pay.
How to choose the best credit card processor
Two factors decide which provider gives you the lowest credit card processing fees.
1. Product stack. A coffee shop needs a POS and card reader. An online business may need a payment gateway, API, or recurring billing. A freelancer sending a few invoices needs invoicing software.
2. Pricing model. Fixed fees cost more on small transactions, percentage fees add up on larger ones. Match the model to your average ticket.
Here's how five common options compare on credit card processing fees:
[Table:2]
All credit card processing fees and G2 ratings are current as of Aug 14, 2026. Helcim and Stax ratings rest on fewer than 20 reviews each, so weigh them against the larger samples above.
1. Stripe
For businesses that want payments inside their product rather than bolted on: hosted checkout, embedded components, APIs, and payment links on one platform.
Pros
- Free standard payouts on a 2-day rolling schedule for new accounts
- ACH Direct Debit at 0.8% capped at USD $5, far cheaper than credit card processing fees on the same invoice
Cons
- Support is self-serve first, with email and chat rather than a phone line
- Add-ons priced separately, and instant payouts cost 1%
2. Square
Strongest when payments are one part of running a physical business. Inventory, scheduling, payroll, and loyalty sit in the same platform.
Pros
- No dispute fee at all, win or lose, where Stripe charges USD $15 and PayPal up to USD $30
- Free POS software, an entry-level reader, and next-business-day deposits
Cons
- Square may hold old funds or apply a reserve on your account under its risk review policies, and the terms are set at its discretion
- Flat pricing means a debit-heavy business subsidizes its own credit transactions
3. PayPal
Wins on payment method breadth. Customers with an existing account check out without typing card details, which lifts conversion on cross-border carts.
Pros
- Payouts land in 1–2 business days, and balance funds are usable immediately
- Invoicing and payment links work with zero technical setup
Cons
- The fixed fee is brutal on small tickets. On a USD $8 sale at 3.49% + USD $0.49 you pay USD $0.77, an effective rate of 9.6%
- Dispute fees run USD $15–USD $30, charged whether you win or lose
4. Helcim
Bundles invoicing, a virtual terminal, recurring payments, and inventory tools into interchange-plus credit card processing fees with no monthly fee.
Pros
- Level 2 and Level 3 data support included free, which unlocks lower commercial interchange on B2B transactions
- No monthly fee, no PCI fee, no contract, and fees refunded on disputes you win
Cons
- Underwriting is a real merchant account application, so approval takes longer than an instant signup
- Your effective rate moves month to month with the cards your customers present
5. Stax
Suits established businesses managing several payment channels, not businesses that just need a checkout.
Pros
- No percentage markup on interchange. On a USD $2500 invoice you pay interchange plus USD $0.15, against roughly USD $72.80 on a 2.9% + USD $0.30 flat rate
- Equipment-agnostic, reprogramming most existing terminals rather than forcing new hardware
Cons
- The subscription is the trap below volume. At USD $5000 a month in card sales, the USD $99 fee alone is 2% of your credit card processing fees before you've paid a cent of interchange
- Against interchange-plus pricing, the subscription and any additional Stax fees eat most of the saving until you're at higher volumes
How to reduce your credit card processing fees
You can't touch interchange or assessments. Everything below moves the two things you control, your markup and which interchange category your transactions land in:
- Move large B2B invoices to ACH, where pricing is flat or capped rather than percentage-based
- Submit Level 2 and Level 3 data on commercial card transactions
- Batch daily before your processor's cutoff, since late settlement downgrades transactions to higher rates
- Capture full address and CVV on keyed transactions to avoid downgrades
- Renegotiate your markup each time you cross a volume threshold, not at renewal.
- USDit your effective rate twice a year
What you can and can't pass on to customers
Three ways to push credit card processing fees onto customers get confused constantly, and the differences are legally material.
[Table:3]
Debit cards can never be surcharged, and several states prohibit or restrict surcharging outright. Confirm your own state's requirements before switching any of your credit card processing fees onto customers.
What's changing in 2026
On Jun 9, 2026, a federal judge granted preliminary approval to the revised Visa and Mastercard interchange settlement. If it holds, it ends 21 years of litigation and resets credit card processing fees for every US merchant.
It would cut the average effective US credit interchange rate by 10 basis points for five years, cap standard consumer credit interchange at 1.25%, end the "honor all cards" rule so merchants can decline some premium and commercial cards, and widen surcharging rights at the brand or product level.
Approval is preliminary. Analysts expect final approval late 2026 or early 2027, followed by appeals that could push implementation years out.
Don't switch processors over it, because the changes apply network-wide regardless of who processes your payments. Don't build surcharging or card-steering infrastructure until the final rules clarify what's permitted.
Getting paid is only half the cost
Your credit card transaction costs aren't fixed, and nothing on your statement tells you when they move. Pull last month's numbers, run the effective rate calculation, and check again in six months.
Then run the same USDit in the other direction. You've worked out your credit card processing fees. Most founders never work out what it costs to move and spend that money afterward.
That's where the leaks are. Aspire¹, a financial technology company, ties spend back to the vendor it belongs to. You get virtual corporate cards² per vendor, 1.5% uncapped cashback^ on eligible spend, and accounting sync to QuickBooks and Xero. The business account¹ costs USD $0 a month, with no charge for local ACH, wire, check, or real-time transfers.
Your processor sets what it costs to get paid. Everything after that is your decision.
Frequently asked questions
What is a typical credit card processing fee for a small business?
Most small businesses pay credit card processing fees of 1.5%–3.5% per transaction plus roughly USD $0.10–USD $0.30. Where you land depends on whether sales are in person or online, your average ticket, and the card types customers use.
How do I calculate my effective rate?
Divide your total monthly credit card processing fees by your total monthly card sales. USD $532 in fees on USD $18,400 in sales is a 2.89% effective rate. It's the only figure that lets you compare two processors honestly.
Are credit card processing fees tax deductible?
Yes, the IRS treats credit card processing fees as an ordinary and necessary business expense, deductible on Schedule C for sole proprietors or the equivalent line of a partnership or corporate return. Keep your monthly processor statements as substantiation.
Do debit cards cost less to accept?
Usually, debit issued by banks above the Durbin threshold is capped at 0.05% plus USD $0.22, far below credit interchange. Flat-rate pricing charges the same either way, which is why debit-heavy businesses do better on interchange-plus.
Why did my credit card processing fees go up when nothing changed?
Your card mix changed rather than your contract. More premium rewards cards, more online or keyed transactions, or more international customers all raise your effective rate at an unchanged published rate. Networks also update interchange twice a year, typically Apr and Oct.
How do I lower credit card processing fees on large B2B invoices?
Move them off cards. ACH pricing is flat or capped, so a USD $5000 invoice costing roughly USD $145 in credit card processing fees can cost USD $5–USD $6. An ACH merchant account accepts bank transfers without routing every transaction through card networks.
