Each bill in Light carries its own currency, independent of the company entity's functional currency or the bank account the payment is made from. Light handles FX conversion in the background based o...
Last updated Jul 22, 2026 · 2 min read
When a bill is paid:
The FX conversion happens automatically when the payment is executed — there is no manual FX rate override in the payment entry dialog. For accounting conversions (and when a bill is marked as paid manually without an executed payment), Light applies its exchange rate for the payment date: ECB reference rates by default, with any company- or entity-level exchange rate overrides taking precedence.
The Bills list shows the bill amount in its native currency. Filters and totals can be applied across currencies; multi-currency totals reflect each currency separately.
Each company bank account is denominated in a specific currency (see Settings → Bank accounts). To pay vendors in a particular currency without FX conversion, set up a bank account in that currency and select it as the From account on bills in that currency.
When a bill in one currency is paid from a bank account in another currency, the difference between the bill's posted value and its value on the payment date creates a realized FX gain or loss. This is posted automatically by Light's accounting engine when the payment clears the bill, to the system FX gain and FX loss accounts.
For period-end FX revaluation across open AP balances, see the FX revaluation tools in the accounting module.
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