Interchange Fee
- Interchange is what your processor pays the customer's bank. You can't negotiate it. Nobody can. What you negotiate is the markup on top
- It's the biggest single line in your bill. It's also smaller than the "70-80%" figure people repeat. On this site's blended card-present mix it runs about 0.89% + $0.158. That's roughly 60% of an interchange-plus bill, closer to 40% of a flat rate on a $50 ticket
- Rates vary by card type, channel, MCC and data quality. A $100 sale carries $0.27 of interchange on regulated debit. On a corporate purchasing card it carries $3.10
- Square Free card-present is 2.6% + 15c. Helcim's entry band is interchange + 0.40% + 8c. They tie when your interchange alone averages 2.06% + 5c, after the 0.14% + 2c of network assessments this site assumes. On a blended mix that's a $9.23 ticket
- Pull your last statement before you use any of these numbers. The card mix is yours, not ours
Interchange is what your bank pays the customer's bank on every card transaction. Yours is the acquirer, theirs is the issuer. The networks set the rate, and Visa, Mastercard, Amex and Discover publish the tables, updated twice a year in April and October.
You can't negotiate interchange. Same category, same card type, same rate for everybody. What you negotiate is the markup on top.
Why It Matters
Interchange is the largest single line in your processing cost, but the widely repeated "70-80%" overstates it for most SMBs. On this site's blended card-present mix, interchange runs about 0.89% + $0.158 per sale, which is $0.60 on a $50 ticket. Helcim's entry-band bill on that sale is $0.97, so interchange is roughly 60% of it. Square's Free plan charges $1.45 at 2.6% + 15c, so interchange is about 40% there. Verified 2026-08-02 at squareup.com/us/en/payments/our-fees.
The rest is the processor's markup plus network assessments. This site carries assessments at an assumed and unverified 0.14% + $0.02. Neither network publishes them.
A credit-heavy mix pushes that share up. A debit-heavy one pulls it down. Treat 60% as an anchor, not a fact about your business.
Understanding interchange tells you:
- Whether your processor's pricing is fair
- Why some transactions cost more than others
- Where you have room to optimize (and where you don't)
How It's Determined
Every transaction gets a rate. Several things decide which one:
| Factor | Impact |
|---|---|
| Card type | Debit cards cost less than credit. Rewards cards cost more than basic cards. Corporate cards cost the most. |
| Transaction type | Card-present (chip/tap) costs less than card-not-present (online). |
| MCC | Your merchant category code affects which rate table applies. Grocery and gas have lower rates than general retail. |
| Data quality | Sending complete transaction data (Level II/III for B2B) qualifies you for lower rates. |
| Authentication | 3D Secure authenticated transactions may qualify for lower interchange. |
Example Rates (US, Visa, card-present)
From Visa's US schedule published 18 April 2026, cross-checked against Mastercard's of 17 April 2026. Both verified 2 August 2026.
| Card Type | Card-present | Online (CNP) |
|---|---|---|
| Regulated debit (Durbin) | 0.05% + $0.22 | 0.05% + $0.22 |
| Exempt debit (small issuers) | 0.70-0.80% + $0.15 | 1.65% + $0.15 |
| Basic consumer credit (no rewards) | 1.51% + $0.10 | 1.89% + $0.10 |
| Standard rewards credit | 1.65% + $0.10 | 2.05% + $0.10 |
| Premium rewards (Signature Preferred) | 2.10% + $0.10 | 2.50% + $0.10 |
| Top consumer tier (Visa Infinite, MC World Elite) | 2.30% + $0.10 | 2.60% + $0.10 |
| Small business cards | around 2.10% + $0.10 | 2.79% + $0.10 |
| Commercial, corporate and purchasing | 2.50-3.00% + $0.10 | 2.50-3.00% + $0.10 |
| Non-qualified (failed qualification) | 3.15% + $0.10 | 3.15% + $0.10 |
The regulated debit figure is the $0.21 Durbin cap plus 0.05%. Add the $0.01 fraud-prevention adjustment most issuers qualify for. It's identical on both networks, because Regulation II sets it federally and neither network prices it.
The two networks converge at the bounds that matter. Top consumer tier is 2.30% + $0.10 card-present and 2.60% + $0.10 online on both. Non-qualified is 3.15% + $0.10 on both. Competitor pages present Visa and Mastercard as two separate lookups. For the numbers that bound your cost, it's one schedule. Two sets of program names.
The same $100 purchase costs $0.27 on a regulated debit card tapped in store and $3.10 on a corporate purchasing card. That's more than 10x on the same sale. No single row here is your rate. Your rate is the mix, which is why this site uses a blended 0.89% + $0.158 card-present rather than any line above.
Three Pricing Models
Your pricing model decides what you see:
| Model | How Interchange Appears | Best For |
|---|---|---|
| Flat rate | Hidden inside one rate (Square Free is 2.6% + 15c card present, 3.3% + 30c online) | Simplicity and predictability |
| Interchange plus | Interchange shown separately + published markup (Helcim is interchange + 0.40% + 8c card present at $0-50K/month, with a $0 monthly fee) | Anyone who wants to see the actual cost |
| Tiered | Bundled into "qualified/mid/non-qualified" buckets | Avoid this model if possible |
Rates verified 2026-08-02: squareup.com/us/en/payments/our-fees, helcim.com/pricing.
Flat-rate pricing (Square, Shopify Payments, Stripe) is simple, but it means you overpay on the cheap cards: debit, plus basic and standard-rewards credit at any normal ticket. You underpay on the expensive ones, meaning premium rewards and commercial. Interchange-plus means you pay the real interchange, the network assessments, and a published markup.
For a small in-person merchant on a debit-heavy mix, interchange-plus is the right default now that the monthly fee is gone. Tiered belongs in neither camp. Bundling interchange into "qualified" buckets is exactly what stops you doing this arithmetic at all.
Common Mistakes
- Trying to negotiate interchange. You can't. It's set by the networks. Negotiate your processor's markup instead.
- Assuming you need volume before interchange-plus makes sense. That used to be true. Interchange-plus carried a monthly fee back then. Helcim now publishes interchange + 0.40% + 8c card present from the first dollar. No monthly fee, no setup fee, no PCI fee, no statement fee (helcim.com/pricing, verified 2026-08-02). Once the monthly fee is zero, volume stops being the question. Card mix is.
- Not knowing your own break-even. Square Free card present is 2.6% + 15c. Helcim's entry band is interchange + 0.40% + 8c. On top of interchange you also pay network assessments, assumed here at 0.14% + 2c. The two prices tie when your interchange alone averages 2.06% + 5c. Interchange plus assessments together tie at 2.20% + 7c. Same rule, stated the other way. Check which basis a comparison uses before you trust it. Below the tie point, interchange-plus wins. Above it, flat rate wins. On this site's blended card mix the break-even is a $9.23 card-present ticket. It moves between $7.94 and $12.20 depending on which card the customer hands you. A debit-heavy retail mix sits far below 2.06%. That's why interchange-plus usually wins for small in-person merchants. A premium-rewards or commercial-heavy mix sits above it and never crosses. Pull your last statement and check.
- Ignoring downgrades. Miss the data requirements and the rate goes up. That's a downgrade. Missing CVV, missing AVS, late settlement. All of them cost you.
- Not checking your effective rate. Total fees divided by total volume. Above 3.0% on card-not-present, go looking. One exception: Square's Free plan prices online at 3.3% + 30c. On that plan you're above 3.0% by design. The fix is a different plan or processor, not an investigation.
How to Optimize
You can't change interchange rates. You can change which rate you qualify for:
- Settle transactions promptly. Capturing within 24 hours avoids downgrades.
- Send complete data. AVS, CVV and order details qualify you for the best rate.
- Enable debit routing. Durbin lets you route PIN debit through cheaper networks.
- Accept digital wallets. Apple Pay and Google Pay are tokenized. That often qualifies them for lower rates.
- Switch to interchange-plus. See the real cost per transaction. Stop overpaying on debit.
See Also
- Interchange Reference - Full interchange rate tables and qualification criteria
- Cost Model Assumptions - The blended interchange figure this site uses, its sources, and the sensitivity checks behind it
- Interchange Optimization - Tactics for qualifying for lower interchange rates
- Reading Statements - How to find interchange costs on your processor statements
- Processor Fees Guide - Understanding all the fees beyond interchange
- Debit Routing - Routing debit transactions to lower-cost networks
- MCC (Merchant Category Code) - How your business category affects interchange rates