Multi-Currency Invoices & Exchange Rates

AI Finance Team supports invoices in any currency published by the European Central Bank. When an invoice is in a different currency from the workspace's base currency, the platform automatically fetches the exchange rate and shows both the original amount and the converted equivalent side by side.

The Workspace Base Currency

Every workspace has a single base currency, set when the workspace is created. All converted amounts throughout the platform — invoice totals, line items, monthly summaries — are expressed in this currency.

The base currency is fixed per workspace and cannot be changed after creation.

How Exchange Rates Are Sourced

Exchange rates come from the European Central Bank (ECB) reference rate feed, which publishes one official rate per currency per business day.

Which date is used?

For invoices, the rate date is the delivery date (Hungarian: teljesítés dátuma) of the invoice — the date the goods or services were delivered. If the invoice has no delivery date, the issue date is used as a fallback.

This follows EU VAT rules: the exchange rate for reporting purposes is the rate on the date of performance, not the invoice date or the payment date.

Weekends and public holidays

The ECB does not publish rates on weekends or public holidays. If an invoice's rate date falls on a non-trading day, the platform uses the most recent available rate from the preceding business days (up to a 5-day lookback).

The Rate caption on the invoice detail page shows the exact date the rate was sourced from, so you can verify it matches what your accounting system expects.

The Invoice List

In the invoice list, the Amount column shows the original invoice currency total. If a base-currency equivalent exists, it appears directly below in smaller, muted text.

If the conversion is not yet available, a status badge appears instead of the converted amount:

Invoices with FX pending or FX failed are still fully usable — extraction is complete and all other fields are available for review and editing.

The Invoice Detail Page

On the invoice detail page, the Amounts & Dates section displays a two-column table when the invoice currency differs from the base currency:

• The left column shows amounts in the invoice currency (net, VAT, gross)
• The right column shows amounts in the base currency, labelled with the currency code

Below the table, a rate caption shows the exact rate used:

Rate: 0.002500 EUR/HUF · 2026-04-17

If the rate was calculated as a cross-rate (neither the invoice currency nor the base currency is EUR), the caption includes an additional note:

Rate: 370.370000 HUF/USD · 2026-04-17 · cross via EUR

Cross-rates are computed from the two ECB reference rates on the same calendar date — EUR/source and EUR/target — so both legs always reflect the same trading day.

Per-VAT-Bucket Conversion

For invoices with multiple VAT rates (for example, a Hungarian invoice with lines at 27%, 18%, 5%, and 0%), conversion is applied at the VAT bucket level rather than to the total. This avoids accumulated rounding error: the gross amount for each bucket is converted first, and the net and VAT are back-derived proportionally.

The line items table shows the converted amounts for each individual line.

What Triggers a Rate Re-Fetch

The platform re-fetches the exchange rate automatically whenever the delivery date or issue date is changed on an invoice. The invoice will show FX pending briefly while the new rate is being retrieved.

Editing amounts (net, VAT, gross) or line item values does not trigger a new rate fetch. Instead, the base-currency amounts are recomputed immediately using the already-stored rate — no external call is made.

Unsupported Currencies

The ECB publishes rates for approximately 30 currencies, covering most major trading currencies in the EU. If you upload an invoice in a currency that is not on the ECB list (for example, Kazakhstani tenge), the invoice will be marked with an FX unsupported badge and flagged for review.

In this case, you can manually correct the base-currency amounts and the exchange rate in the invoice editor if you have the correct rate from another source. The unsupported badge will clear once the base amounts are populated.

Tips

• Delivery date drives the rate. If an invoice shows an unexpected rate, check that the delivery date is correct — it takes priority over the issue date for the rate lookup.
• Pending clears automatically. Invoices marked FX pending are processed in the background. There is no need to manually trigger anything; the rate will appear within minutes.
• The rate caption is your audit trail. The date shown in the rate caption is the ECB source date, which you can cross-reference with your accounting system's currency table.
• Cross-rate invoices need both legs. For a USD invoice in a HUF workspace, the platform requires ECB data for both EUR/USD and EUR/HUF on the same date. If either leg is unavailable, the invoice stays pending until both are available.