# Invoice in another currency

> Invoice in a currency other than AED; Alya Books fills in the UAE Central Bank exchange rate for the date of supply.

Source: /help/en/invoices/other-currencies

You can invoice in any enabled currency. When it is not AED, the invoice also states the exchange rate, VAT in AED and the total in AED. Alya Books fills in the rate from the UAE Central Bank.

## Invoice in another currency

1. In the invoice editor, choose the **Currency** in the meta block, for example USD.
2. The field **Exchange rate (AED per 1 USD)** appears next to it. Alya Books fills it in with the UAE Central Bank rate ("Exchange rates against UAE Dirham for VAT related obligations") for the date of supply: the tax point date if set, else the delivery date, else the issue date.
3. The note under the field names the rate's date, for example "UAE Central Bank rate of 25 Sep 2026, the last published on or before 27 Sep 2026".
4. To use your own rate, type it into the field. It is then typed by hand and Alya Books no longer changes it. The note shows the Central Bank rate with a **Use it** link to switch back.

The totals box then shows the rate, VAT in AED and the total incl. VAT in AED (IBT-111 and BTAE-20 of the e-invoice). Paid in advance and rounding do not change these two: they reduce only the **Amount due**, which the e-invoice states in the document currency. When they differ, the totals box adds **Amount due in AED** for information. The PDF prints "Exchange rate (UAE Central Bank, date)" under the totals, and the e-invoice carries the rate and the AED amounts.

## Good to know

- The Central Bank publishes on working days, around 6 pm UAE time. On weekends and public holidays, and in the morning before today's rate is out, Alya Books uses the last rate published before the date.
- The Central Bank publishes rates for 76 currencies. Only those (plus AED) are switched on by default under **Settings → Codes & regions**; every other ISO currency can be switched on there and is marked **No Central Bank rate: entered by hand**. Switch off the currencies you never bill in to keep the picker short.
- For a currency the Central Bank does not publish, the note says so as soon as you pick it, and a second field asks for the **source of the rate** (for example "Bloomberg, 6 Oct 2026"). Alya Books keeps that note with the invoice for your records; the e-invoice carries the rate and the AED amounts as usual. The VAT law asks for the Central Bank rate where one exists; which source to use otherwise is a question for your tax adviser.
- When the Central Bank does publish the currency but has no rate yet for the days before your date of supply, the note says that instead, and you can enter a rate or try again later.
- Changing the currency clears the rate and looks it up again.
- Issued invoices are locked and never change their rate.
- The rate takes up to 6 decimals. A USD rate far from the 3.6725 peg gives a warning: you probably entered it the wrong way round.
- Quotes and order confirmations have no exchange rate field; they are not e-invoices.
- Through the API, an invoice in another currency without `exchangeRate` gets the Central Bank rate.
- Totals across documents (the **Dashboard**, the summary cards on **Invoices**, **Incoming Invoices** and **Proformas**, **Analytics** and **Projects**) are in AED: each document counts at its own rate, else the Central Bank rate of its date. A document with no rate at all is left out, and the card says how many were not converted.

## Related

- [Central Bank exchange rates](/help/en/vat/exchange-rates)
- [Payment methods and other currencies](/help/en/invoices/payment-methods-and-currencies)
- [Understand validation errors](/help/en/invoices/validation-errors)
- [VAT 201 worksheet](/help/en/vat/vat-201-worksheet)