Choose
Start with the record and rule
Choose the official source and date your invoice, policy, accountant, client, or reviewer expects.
Exchange-rate evidence
Keep clear evidence of the exchange rate used in a business record
FXProof turns an official exchange rate into a signed proof you can keep, verify, and share. Save the source, selected date, rate context, document id, payload hash, and verification details with the invoice, expense, accounting entry, tax file, or review that used the rate.
Not sure whether you need a bank rate or an official reference rate? Understand the difference
Choose, keep, and verify exchange-rate evidence
Open
Keep the proof with the record
Open a ready proof bundle and save the signed proof with the business file that used the rate.
Verify
Let another person check it
An accountant, auditor, client, or reviewer can check the document id and payload hash without your account.
What you keep
More useful than a copied rate or disappearing link
A number alone does not explain where it came from. A ready proof bundle keeps the source, selected date, signed proof, and verification details together for the person who checks the record later.
Source attribution
The official source remains visible and separate from the FXProof proof layer.
Signed proof document
The FXProof PDF records the selected dataset and date in a format that can stay with the business file.
Document id
The document id gives reviewers a stable reference for later checks.
Payload hash
The hash identifies the recorded proof payload and supports public verification.
Common workflows
Start with the business record in front of you
Start with the task in front of you. Each guide shows where an exchange-rate proof fits and what a reviewer can check later.
Accounting close
When an accounting entry, reconciliation, or close file depends on an exchange rate, keep the evidence beside the calculation. FXProof packages the official source, selected date, rate context, and verification details in a signed proof that an accountant or later reviewer can check.
Open use caseTax reporting
When a tax workpaper or schedule uses an official reference rate, keep the source, selected date, rate context, and signed proof with that record. FXProof makes the chosen evidence easier to share and check later; it does not choose the tax treatment or guarantee acceptance.
Open use caseAudit workpapers
When a workpaper depends on an exchange rate, give the reviewer more than a copied number or link. Keep a signed proof with the source, selected date, rate context, and verification details so the reviewer can inspect the evidence without rebuilding the trail or signing in to your account.
Open use case
Before you choose
What belongs in a useful exchange-rate record?
The right evidence depends on the question the record must answer. These are the points most people need to settle before they choose a source, date, or plan.
What should I keep with an exchange-rate calculation?
Keep the invoice, expense, accounting entry, or other business record, plus the official source, selected date, rate context, and signed proof used to support the calculation.
Is a source link enough?
A link identifies where data came from, but the page can change. A signed proof keeps the selected source data and verification details with the record that used them.
Can another person verify the proof?
Yes. The signed PDF shows a document id and payload hash that a recipient can check on the public verification page without access to your account.
Does this show the rate charged by my bank?
No. A bank or payment-provider record shows the rate applied to a transaction. FXProof documents supported official reference rates used for a separate business calculation.
Can I use it for a historical date?
Yes, when the selected dataset and historical date have a ready proof bundle. A published rate and a ready signed proof are separate availability checks.
Is it practical for a small business?
Yes. You can use FXProof for one invoice, expense, payment, or year-end file. You do not need an accounting department or a recurring workflow.
Use FXProof once or make it part of regular work
Keep one important record complete
A freelancer or one-person business may need a proof only for an invoice, expense, payment, or year-end file. Search first, inspect a sample, and open a ready proof only when a real record needs it.
See the small business use caseUse the same evidence pattern every time
Accounting, tax, audit, and control teams can keep the same source, date, proof, and verification fields across repeated records instead of explaining each calculation from scratch.
Explore regular-use options
Supported sources
Supported official sources
Active source integrations are loaded from the FXProof source catalog. Source institutions do not endorse FXProof.
boc
Bank of Canada
ecb
European Central Bank
fed
Federal Reserve System
hmrc
His Majesty's Revenue and Customs
nbk
National Bank of Kazakhstan
See whether the proof fits your record
Inspect a public sample first. If the format answers the question your accountant, client, or reviewer may ask later, create an account and find a ready proof.