The exchange rate changes after goods are purchased, making the supplier payment more expensive in riyals. Should the warehouse units receive the same cost increase? In a straightforward credit purchase without hedging or special arrangements, inventory and the supplier payable are not translated identically. One is a non-monetary asset measured at historical cost; the other is a monetary foreign-currency liability.
IAS 21 distinguishes these categories. Separate three moments: initial recognition, a reporting date while the debt remains unpaid, and settlement. The following example assumes the riyal is the business's functional currency and purchase-recognition conditions are satisfied on the first date. Exchange rates are illustrative, not historical or current quotations.
One invoice, three supplier amounts
The business buys goods on credit for EUR 10,000. At recognition, the rate is SAR 4 per euro, producing inventory and a payable of SAR 40,000. Taxes and other purchasing costs are excluded from the example.
At period end, the full invoice remains unpaid and the closing rate is SAR 4.10 per euro. The liability translates to SAR 41,000, with a SAR 1,000 exchange loss in this simplified case. Inventory's historical cost is not increased to SAR 41,000 merely because the debt is retranslated.
In a later period, the business pays the full amount at SAR 4.05 per euro, using SAR 40,500 without bank charges. Compared with the carried-forward payable of SAR 41,000, settlement produces a SAR 500 exchange gain. Across both periods, the net exchange loss is SAR 500: the difference between the initial equivalent and the cash paid.
| Stage | Liability in EUR | Equivalent in SAR |
|---|---|---|
| Purchase recognition | 10,000 | 40,000 |
| Closing before settlement | 10,000 | 41,000 |
| Amount settled | 10,000 | 40,500 |
If the goods are sold during this interval, the purchase date or original unit cost should not be reopened merely because treasury paid at another rate. Management may analyse the import decision's overall economics, but that analysis should distinguish inventory measurement from exchange differences.
Where operational errors hide
The first error is losing the original foreign-currency amount. Retaining only the riyal equivalent makes it difficult to explain an unpaid balance or settlement difference. Keep the currency, original amount, conversion rate, date and rate source, alongside the remaining balance after each payment.
The second is confusing a bank fee with an exchange difference. A bank debit of SAR 40,650 might include a SAR 150 transfer charge. Do not call the entire difference a currency movement. Separate pricing from the banking service, then classify each component according to its nature and the applicable policy. A detailed bank document is more informative than comparing the total debit with the invoice alone.
The third is applying the closing adjustment twice: once in retranslation and again on payment as though the payable still had its original amount. Settlement must start from the actual carrying amount, with an understanding of whether the software reverses or retains the earlier valuation entry.
Limits that should not be overlooked
Advances, hedging, measurement other than historical cost and special circumstances require additional analysis. Do not automatically copy these entries into those cases. Inventory impairment assessment also remains necessary: retaining the historical-cost exchange rate does not mean ignoring net realisable value when saleability deteriorates.
For monthly reconciliation, start with the supplier's statement in its original currency, matching invoices, payments and credit notes before reviewing the riyal translation. If the foreign amount agrees but the functional-currency equivalent differs, examine rates and related entries. If the foreign amount itself differs, the underlying problem is not an exchange difference but a movement or document requiring investigation.
Sources & further reading
Visit the original source to explore the concept and its wider context.
General educational content. Appropriate treatment depends on your business and accounting policies; consult your accounting professional when applying it to business records.
