Why did my processing bill go up?
A processing bill can rise without your rate changing, and it can rise because your rate changed and nobody told you. Comparing two statements side by side will tell you which, usually in about ten minutes.
What this page settles.
Three questions, in the order most people ask them.
First, compare like with like
Put two statements side by side — the month that surprised you and a normal month before it. Calculate the effective rate for both: total fees divided by total card volume, times 100.
This matters because bigger bill and more expensive are different problems. A busy month costs more and should. Only the effective rate tells you whether anything actually changed.
If the effective rate is flat and only the dollar total moved, you processed more. Nothing is wrong. If the effective rate moved, keep reading.
The eight causes, in rough order of how often we see them
1. A quiet month. The commonest cause by a distance, and the one nobody expects. Monthly service, statement, PCI and gateway fees are fixed. In a slow month they are divided by a smaller volume, so the percentage rises while the dollar amount of those fees has not changed at all. January after December is the classic.
2. Your card mix shifted. More rewards cards, more corporate cards, more online or keyed sales, fewer debit transactions. Every one of those costs more at interchange, under any pricing model. A single large B2B customer paying by corporate card can move a whole month.
3. A rate review. Many merchant agreements allow periodic rate adjustments, with notice given as a line on a prior statement. If your bill stepped up and has stayed up, look at the fee detail on the two months before the increase for a notice you did not read.
4. The April and October interchange updates. Visa and Mastercard publish interchange changes on a roughly semi-annual schedule. These are genuine pass-through cost changes, they affect every processor equally, and they are the one cause on this list that is nobody’s fault.
5. PCI validation lapsed. A non-compliance fee started and nobody mentioned it. This one is both common and entirely reversible.
6. A free period ended. Gateway free for six months, monthly fee waived for the first year, equipment included for an introductory term. Introductory pricing ends on a schedule set at signing and announced nowhere.
7. More downgrades. On tiered pricing, a shift in the proportion of sales settling non-qualified raises the bill with no change to any quoted rate.
8. Something new was added. A gateway, a compliance program, a software charge, an equipment lease that began billing after an installation. Compare the list of line items between the two months, not just the amounts — a new row is easy to miss among familiar ones.
Finding which one it was
Work down this order:
- Did the effective rate change at all? No → volume. Done.
- Are there line items present this month that were absent last month? → Something was added.
- Did the fixed monthly fees stay the same in dollars while volume fell? → Cause one.
- Did the percentage rates themselves change? → A rate review, or an interchange update if it happened in April or October.
- Did the split between qualified and non-qualified move? → Card mix or downgrades.
- Is there a compliance or non-validation line? → PCI.
Keep the two statements open while you call. “My effective rate went from 2.8% to 3.4% between March and April and I want to know which line did that” gets a different conversation than “my bill seems high”.
What a reasonable answer sounds like
A processor should be able to tell you, specifically: which line changed, by how much, and why. “Interchange went up” is not an answer by itself — interchange changes are published, so they can name the change. “Your mix shifted” is a real answer when it comes with the percentages.
If you get a vague answer twice, the honest next step is to have someone mark the statement up independently. We do that free, including for businesses we conclude should stay exactly where they are — which happens, and we say so.
While we are on the subject
Can my processor raise my rates without telling me?
Most merchant agreements permit a rate change with notice, and that notice is often a line on a statement rather than a phone call. Check your agreement for the notice clause, and check the statement from the month before the increase for small print you skipped.
My volume went down but my bill went up as a percentage. Is that normal?
Yes, and it is the commonest version of this. Fixed monthly fees do not shrink with your volume, so a quiet month spreads the same fixed cost across fewer dollars and the effective rate rises even though nothing was changed.
Should I call and complain?
Call and ask, with the two statements in front of you and the specific line identified. A processor that will not explain a specific line item on a specific statement has told you what you need to know.