FX gain and loss: how it is calculated and posted
Understand how foreign exchange gains and losses arise and where they appear in your accounting.
What is FX gain and loss?
When you work with invoices, bills, or account balances in foreign currencies, you face exchange rate risk. The value of your foreign holdings in your home currency changes as exchange rates fluctuate. This difference between the original and current rate is called a foreign exchange (FX) gain (when the rate moves in your favour) or FX loss (when it moves against you).
Why it matters
FX gains and losses are real accounting events. They affect your profit and loss, your account balances, and your financial reporting. By understanding how Usystems calculates and records these, you can accurately report foreign currency positions and make informed currency management decisions.
How it works in Usystems
When you receive an invoice in a foreign currency or hold a vendor balance in USD, that amount is recorded at the exchange rate on the transaction date. Later, if the exchange rate changes, the value of that balance shifts. Usystems tracks this difference:
- Realized FX gains/losses occur when you settle a foreign-currency transaction (e.g., pay an invoice in USD after the rate has moved). The gain or loss is calculated as the difference between the rate on the original date and the rate on the payment date.
- Unrealized FX gains/losses occur when you hold a foreign-currency balance but have not yet settled it. Usystems calculates these when you revalue your foreign accounts.
Both types are posted to your FX Gain/Loss account (a designated revenue or expense account in your chart of accounts), so they appear in your profit and loss statement.
Where you see it
- On transaction reports — when you settle a foreign-currency invoice or bill, the FX gain/loss line item is visible on the payment or settlement entry.
- In the Balance Sheet — unrealized FX gains/losses on outstanding foreign balances appear as part of your account equity (posted to the FX revaluation account).
- In Financial Reports — profit and loss statements and ledger reports show FX gains and losses as separate line items.
For more detail on how to initiate a revaluation and see these adjustments, see Revaluing foreign balances.
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