Tools

Estimate card fees or prepare a refund trace request. Check each tool’s sources and limits before using its results.

Estimate a costFree to embed
Credit Card Processing Fee Calculator
Work out the real cost of accepting a card payment
Average transaction · Transactions per month · International cards · Needs currency conversion
$100 × 500 · 20% intl · 20% FX →3.70%
Published rates from 6 providers · as of 2026-09-09 Open calculator
Look up a code
ARN Refund Trace Assistant
Check a reference format and prepare a refund trace message. No live refund lookup.
Refund reference (optional) · Cardholder or merchant · Refund situation
23-digit reference →ARN-like
Format rules and provider sources · live status not checked Open ARN tool

Know what each tool can tell you

Runs in your browser — no account needed.
Fee estimates use published rates; reference checks do not verify a refund.
Embedding is available only for tools marked “Free to embed”.

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