The short answer
Your effective rate is total monthly fees divided by total monthly card volume, times 100. A business processing $68,000 with $2,318 in total fees has a 3.41% effective rate. It captures every fee — discount rate, per-item charges, monthly fees, assessments — which is exactly why providers prefer to talk about anything else.
Why the quoted rate is not your rate
A quoted rate applies to one interchange category. Rewards cards, business cards, keyed transactions and foreign cards all cost more, and monthly fees sit on top of everything. On most statements the quoted rate covers under a third of actual volume, which is how a 1.79% quote becomes a 3.41% bill.
What a competitive number looks like
Card-present retail runs 2.10%-2.45% when priced well. Restaurants 2.25%-2.60%. eCommerce 2.50%-2.95%. B2B with Level III data can go below 2.10%. Above 3.2% on in-person volume, something recoverable is almost always sitting in the fee schedule.
Track it over three months
Calculate the rate for three consecutive statements. A rate climbing 5-15 basis points a quarter with no change in your card mix is rate creep — margin quietly added to your account. It is rarely announced and almost never noticed.
Key takeaways
- Total fees ÷ total volume × 100 = effective rate
- Compare providers on effective rate only, never on quoted rate
- Three consecutive months reveals rate creep
Want this checked against your own statement?
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