When you issue or receive invoices in a foreign currency, VAT and tax reporting require you to convert those amounts using an official exchange rate, not an arbitrary market or app rate. Using the wrong rate can create discrepancies in your VAT return and problems in an audit.
This article is general information, not tax advice. Always check the specific rules that apply in your jurisdiction.
Which exchange rate should you use for VAT?
The exact rule depends on the country, but the common principle is that you must use an official, published rate and apply it consistently across the reporting period. Two sources are typically accepted:
- The central bank rate: for example the European Central Bank (ECB) reference rate. Under the EU VAT Directive, businesses may use the latest ECB rate published at the time the VAT becomes due.
- The tax authority’s own published rate: for example HM Revenue & Customs (HMRC), which publishes monthly exchange rates for VAT and customs that UK businesses may use instead of the ECB rate.
Whichever you choose, most authorities require the method to be applied consistently to all foreign-currency transactions in the return period. Rules differ by country, so confirm your local requirements.
Why official rates matter, and market rates don’t
Market or midpoint rates from a generic currency API fluctuate every second and are not the figures a tax authority publishes. For VAT, customs, and statutory reporting you need the official rate for the relevant day or month, from the central bank or tax authority: the same figure an auditor will check against.
How to get official rates for VAT reporting
Global Exchange Rates provides official exchange rates from central banks and tax authorities worldwide, including the ECB and HMRC, through a single API. It is already trusted by VAT-compliance specialists and finance teams, and makes it straightforward to:
- Convert foreign-currency invoices using the correct official rate, automatically.
- Keep an auditable, consistent source of rates across all entities and periods.
You can pull the rates directly via the API, or use the native connectors for accounting and ERP systems: SAP (S/4HANA and ECC), Microsoft Dynamics 365 Finance & Operations, Business Central, QuickBooks and Salesforce. The official rate then flows straight into your VAT workflow.
Frequently asked questions
Which exchange rate should I use for VAT?
An official published rate, typically the central bank rate (e.g. the ECB) or your tax authority’s published rate (e.g. HMRC), applied consistently across the return period. Check the specific rule for your country.
Is a market or midpoint rate acceptable for VAT?
Generally no. Tax reporting expects the official published rate, not a live market or midpoint rate. That is the core difference between an official-rate source and a generic currency API.
Conclusions
For VAT and tax reporting you need official, auditable exchange rates, and a consistent, automated source of them saves time and reduces risk at audit. Global Exchange Rates delivers official rates from central banks and tax authorities worldwide, via API or directly inside your accounting and ERP systems.
Get your API key to start, and see the full list of supported central banks and tax authorities.
