Free tools for merchants

Everything here is free, runs in your browser or lands in your inbox, and asks for nothing but an email when you want a specialist to follow up. No statements are uploaded anywhere on this site — ever.

Effective-rate calculator

Two numbers from any statement — total volume and total fees — and you get your true effective rate with a plain-English verdict, adjusted for your kind of business.

Run my numbers

Junk Fee Spotter

Tick the fee names you see on your statement and get an instant read on which lines are worth questioning — inflated, duplicated, or misbilled charges — right in your browser. Nothing you tick leaves your device.

Check my fee lines

Fee dictionary

What is a "NABU fee"? An "APF"? A plain-English glossary of the line items on card statements — which ones the card brands set, which ones your processor sets, and which ones deserve a question.

Look up a fee

Statement-readiness checklist

The one-page checklist of what to have ready before an audit — so the specialist call is short and useful. The checklist is free; the audit is free; neither obligates you to switch anything.

Get the checklist

Processor fee-change tracker

Announced pricing changes from the big processors — what changed, when it lands on statements, and what to check on yours. A fee-change notice is the best moment to look at your numbers.

See recent changes

Sample audit report

See exactly what a finished audit looks like — a fictional café, invented figures, real format — before you ever request one. The report is yours to keep whether you switch or not.

View a sample audit

Embed the calculator

Run a bookkeeping, consulting, or small-business site? Embed the free calculator for your readers with one snippet. It is a calculator, not an ad — and Processing Signal is not a processor.

Get the embed

The free audit itself

Start with just your email. A specialist works from your actual statement — sent by you directly through a secure channel, never through this website — and shows your true effective rate in plain English.

Request my free audit

Paying too much to accept cards?Get the free audit