Merchant guide

How to calculate your effective processing rate

Your effective rate summarizes what you paid to accept cards during a period. It is a useful comparison point, although it does not explain every cost by itself.

The basic formula

Example: if you processed $20,000 and paid $600 in related fees, your effective rate was 3%. Use figures from the same period and check whether any charges were debited separately.

What to include in total fees

Include processing, transaction, service, platform, and other recurring costs related to accepting cards. Check your bank account for separate debits that may not be included clearly on the statement.

Why the rate changes

The effective rate can vary with card type, transaction method, average ticket, refunds, chargebacks, and monthly fees. A higher rate does not automatically prove there is an error.

How to use it correctly

1. Calculate the rate for three consecutive months.
2. Compare months with similar volume and sales mix.
3. Identify which statement line explains each material change.
4. Require proposals to include all fees, not only a promotional rate.

When a result deserves review

There is no single correct rate for every business. The most useful signals are unexplained changes, costs growing faster than sales, or proposals that do not show how the total was calculated.