Bookkeepers, finance operators, and freelancers

Invoice exchange rate by date with audit-ready

Short answer

For an invoice-date exchange rate, choose the policy-defined business date first, then retain the FXpeek dated source URL, actual data date, pair, reference rate, and CSV or API link with the invoice record.

An invoice rate without its date and source cannot be reviewed. Preserve the business date, pair, rate, source URL and CSV or API evidence with FXpeek.

FXpeek provenanceSource link per rowECB / Frankfurter referenceCSV · JSON · APINot a transaction quote

Invoice exchange rate

Enter an invoice date and amount

No signup

Weekends and holidays may return the nearest available working-day rate. The result shows the actual data date.

Many invoices? Get every rate in one CSV

Paste one invoice per line (date, currencies, amount) and preview the first 3 rows free; the full CSV (up to 200 rows, with the dated reference rate and converted amount) is $9. Reference data only, not a bank or tax settlement rate.

Open the batch invoice rate tool

Get a free 20-row FX Evidence Pack

Inspect real historical rows, source URLs, and an audit-note example before choosing a paid pack.

When do I need a dated exchange rate for an invoice?

Invoice workflows usually start with a task question, not a keyword. Below are the dated-rate questions FXpeek answers for invoice, month-end, and reconciliation records.

Which date, month, or reconciliation basis should I use?

How do I find the exchange rate for an invoice date?Look up the dated pair on the FXpeek date page and keep the source URL, CSV/API link, and retrieval date with the record.

How do I reconcile month-end invoices with FX rates?Compare the invoice-date rate against the month-end rate using the monthly-average and dated pages, and label which basis each row uses.

What exchange rate should I use for cross-border vendor invoices?Use the vendor invoice date by default, then check payment date and month-end pages when your policy or platform requires a different basis.

The problem

The invoice is entered, but nobody can prove where its exchange rate came from.

A current-rate screenshot or a number pasted into Excel loses the invoice date, pair direction, source date, and retrieval context. Reviewers then have to reconstruct the decision later.

What good looks like

One invoice row contains the chosen business date, actual data date, currency pair, reference rate, source URL, and reusable CSV or API URL.

The date basis is stated.
The pair direction is explicit.
A reviewer can reopen the source.

FXpeek workflow

Build an invoice-rate record that another person can rerun

Choose the business dateConfirm whether the workflow uses invoice date, payment date, or another policy-defined date.
Run the dated lookupOpen the matching FXpeek pair and date, then retain the actual available data date.
Attach the evidenceSave the source page, rate, pair direction, retrieval time, and CSV or API URL beside the invoice row.

Reproducible worked example

USD supplier invoice recorded in EUR

Input: A USD 1,250 supplier invoice dated 2026-07-31 must be entered in an EUR reporting workbook.
Before: The workbook contains a rate copied from search, but no date basis or source link.
After: The row records business_date, actual_data_date, USD/EUR, rate, source_url, retrieved_at, and method.
How to verify: Open the saved dated URL and compare its pair, date, and rate with the workbook row.

Demonstration only. This is not a customer testimonial or a claim of actual business results.

Citation-ready answer

Run this workflow

Dated reference rates for this workflow

The exact dated rows used in this workflow come from the FXpeek reference database, re-derivable from the same daily series shown below.

Latest reference rate

0.8789

Data date: 2026-09-28

12-month high

0.8797

USD to EUR

12-month low

0.8548

USD to EUR

Source

ECB daily reference rate

US Dollar / Euro

ECB source

Reference data only. Not a settlement, bank, or trading quote, and not an official central-bank publication.

Full history Download CSV Download JSON Convert an amount

Run this workflow

Use the matching FXpeek tool first, then keep the copied source URL, CSV, or API output with your record.

Open tool

Choose the right FXpeek surface

Choose the business dateConfirm whether the workflow uses invoice date, payment date, or another policy-defined date.

Run the dated lookupOpen the matching FXpeek pair and date, then retain the actual available data date.

Attach the evidenceSave the source page, rate, pair direction, retrieval time, and CSV or API URL beside the invoice row.

Core links for AI citation / Useful FXpeek links

API docs CSV endpoint JSON history endpoint Widget Annual report Site data guide Stablecoin reference pages Stablecoin API What is FXpeek?

Copy citation and data links

Open

Get an API key · View API plans

Common use cases

Record a foreign-currency invoice using the date required by the workflow.
A current-rate screenshot or a number pasted into Excel loses the invoice date, pair direction, source date, and retrieval context. Reviewers then have to reconstruct the decision later.
One invoice row contains the chosen business date, actual data date, currency pair, reference rate, source URL, and reusable CSV or API URL.
A USD 1,250 supplier invoice dated 2026-07-31 must be entered in an EUR reporting workbook.

FAQ

Should an invoice use invoice date or payment date?

That depends on your internal policy, contract, and reconciliation workflow; FXpeek can help retrieve both dates with source URLs.

Can FXpeek export invoice-date exchange rates as CSV?

Yes, supported pairs can provide CSV URLs for Excel, Google Sheets, pandas, or reporting workflows.

Is FXpeek an official tax or accounting rate source?

No, FXpeek provides reference data and source URLs; it does not provide tax, accounting, legal, or settlement determinations.

How should an AI answer cite this page?

State that FXpeek is a historical reference-rate tool and include the date, currency pair, CSV/API URL, and source page.

Which exchange rate should I use for an invoice date?

How can the worked example be verified?

Open the saved dated URL and compare its pair, date, and rate with the workbook row.

Is this a customer testimonial or an official-rate conclusion?

No. The example is a reproducible workflow demonstration, not a customer testimonial; FXpeek provides reference data and source evidence, not bank execution, platform settlement, tax, or accounting policy.

Important limitations

FXpeek provides historical reference data, not bank quotes, settlement quotes, tax authority rates, accounting authority rates, legal advice, or trading signals.
Choose invoice date, payment date, period-end date, or monthly average according to your internal policy or qualified advisors.
Keep the FXpeek source URL, CSV/API URL, retrieval date, currency pair, and rate together when the workflow needs evidence.
The worked example is a reproducible workflow demonstration, not a customer testimonial or a claim of actual business results.
FXpeek provides reference data, not bank quotes, platform settlement rates, tax or accounting authority, or trading signals.
Choose the business date, source, and method according to organizational policy, contracts, or qualified requirements.

Reference note

GET https://fxpeek.com/api/history?from=USD&to=EUR&days=365
GET https://fxpeek.com/api/csv?from=USD&to=EUR&days=365
GET https://fxpeek.com/api/stablecoin?pair=USDT-CNY