There is no single exchange-rate date that fits every accounting situation. First identify the applicable accounting policy, contract or tax rule, then select the transaction, payment, settlement, posting or period-end date. The critical requirements are consistency, traceability and retention of the actual provider date.
What the common dates represent
The transaction date is when the economic event occurs. The payment date is when funds are sent. The settlement date is when the transaction clears. The posting date is when the account records it. A period-end date may be used to remeasure foreign-currency monetary items. Exchange differences can arise between these dates.
Policy before data
Internal policy, contracts, reimbursement rules and local regulations may prescribe the rate source and date. A general historical reference value can support review and estimation, but it does not replace mandatory accounting standards, tax notices or organizational rules.
Use a consistent record template
Record the source amount, currency, business date, selected rate date, actual provider date, rate, converted amount, source and reason for the selection. If the transaction and settlement dates differ, retain both and calculate any difference required by the policy.
The historical rate tool can provide a dated reference.
Period-end remeasurement and exchange differences
Foreign-currency cash, bank balances, receivables and payables may require remeasurement at period end. The treatment of the difference between the period-end value and the original carrying amount depends on the applicable policy. Do not replace the original basis with an arbitrary later date.
Review and audit preparation
Retain the data page, CSV, internal approval and calculation worksheet. For many transactions, standardize currency codes and decimal precision and assign a reviewer. If a weekend request returns the previous business day, document that actual provider date rather than treating the request date as the data date.
See the historical-rate guide for the underlying concepts.
Sources, scope and review date
This article is general educational information and is not financial, investment, tax or accounting advice. For a specific payment, filing or bookkeeping decision, use the terms supplied by your bank or payment provider and the rules that apply to you.
Data and method note: when CurrencyFlow displays conversions or historical rates, it uses reference data with an actual provider date. Last reviewed: 2026-08-03.
Frequently asked questions
What if the transaction and payment dates differ?
Record both dates and rates under the applicable policy and calculate any required exchange difference.
Can a website rate replace a rate prescribed by accounting rules?
Not automatically. Follow the organization’s policy, accounting standards and tax requirements first.
What if period end falls on a weekend?
Use the method required by the applicable policy, such as the most recent valid date, and document the actual date and rationale.
How this guide is maintained
This guide is maintained by CurrencyFlow. Automated checks cover structure, duplication and basic consistency; they are not a claim of human expert endorsement. Dated public reference data is used as a comparison benchmark, while banks, cards, ATMs and transfer providers may add spreads, fees or use another processing date.
- Maintained by
- CurrencyFlow
- Last updated
- 2026-08-22