Also called: Minimum monthly service charge, Minimum processing fee
What a monthly minimum is
A monthly minimum sets the least amount of eligible processing fees your provider expects you to pay each month. When those fees fall below the floor, you pay the shortfall. It is different from a minimum sales volume: the calculation is based on fees that count under your contract, not simply your total card sales.
The provider sets the floor in your merchant agreement. There is no single required amount or standard calculation across providers, so the contract matters more than the fee label.
A low processing rate can still cost more if your eligible fees fall short of a monthly floor.
How the shortfall is calculated
For example, if your contract sets a $25 monthly minimum and you generate $11 in eligible fees, you owe another $14 to reach the floor. That $14 is the shortfall, not a second $25 charge. The figures are illustrative; your contract sets the amount and calculation.
On interchange-plus pricing, some contracts count only the processor markup toward the minimum. Interchange and network assessments still appear in your total processing cost, but they do not reduce the shortfall under that calculation. With bundled or tiered pricing, the qualifying portion can be harder to separate from the total rate.
Illustrative monthly shortfall
| Contract minimum | $25 |
|---|---|
| Eligible fees | $11 |
| Shortfall owed | $14 |
Illustrative figures only. Your contract determines the minimum and which fees count.
What it means for your costs
A monthly minimum adds cost when your eligible fees do not reach the floor. A new business with few transactions, a seasonal shop during its quiet months, or a business that pauses card acceptance can face a shortfall even when its regular processing rate looks low.
The fee does not go to a card network or issuing bank. It is revenue for the processor or acquirer. Compare the floor with your eligible monthly fees, not just your sales volume, before weighing a quoted rate against another offer.
Where it appears on your statement
Search your merchant statement for labels such as “Monthly Minimum,” “Minimum Processing Fee,” or “Minimum Monthly Service Charge.” Compare the amount billed with the monthly floor in your contract and the eligible fees for that same billing month.
If the statement lists a shortfall but does not show which fees counted, add up the eligible fee lines separately. On an interchange-plus statement, distinguish processor markup from interchange and network assessments before checking the calculation.
What you can actually change
- Find the floor. Locate the monthly minimum clause in your merchant agreement and note the amount, billing period, and fee categories included in the calculation.
- Recalculate the shortfall. For each billed month, total only the fees your contract says qualify, then subtract that total from the minimum. Compare the result with the statement charge.
- Negotiate it out. Ask for the minimum to be removed or reduced, especially if your volume is seasonal or your monthly eligible fees stay below the floor. Compare the revised terms with a quote that has no minimum.
Frequently asked questions
Is a monthly minimum an extra processing fee?
It is a shortfall charge when your eligible processing fees do not reach the contract floor. If you meet or exceed the floor, the minimum does not add a separate shortfall. The specific fees counted depend on your contract.
Do interchange fees count toward a monthly minimum?
Some contracts count only the processor markup, leaving interchange and network assessments out of the calculation. Read the minimum clause for the fee categories that qualify, then compare those categories with your statement.
Can I negotiate or remove a monthly minimum?
Yes. Ask the provider to remove or lower the floor, or compare an offer with no minimum. Use your actual eligible monthly fees and any shortfall charges to show how the current term affects your cost.