Exchange Rates on 31 December 2025 and 31 March 2026 for Hong Kong: HKAS 21 Closing Rates

Year-end revaluation needs one number per currency and a source the auditor can check. This page gives the Hong Kong dollar rates for the two most common Hong Kong year-ends, 31 December 2025 and 31 March 2026, from the Hong Kong Monetary Authority (HKMA) daily series, and sets out what HKAS 21 asks for.

The rates

Hong Kong dollars per one unit of foreign currency (yen per 100), from the HKMA daily figures released with the Monthly Statistical Bulletin.

The US dollar column is the Linked Exchange Rate System at work: since 17 October 1983 the Hong Kong dollar has been kept within a band of HK$7.75 to 7.85 to one US dollar. If a US dollar closing rate in your ledger falls outside that band, the mapping is wrong.

What HKAS 21 requires

HKAS 21, The Effects of Changes in Foreign Exchange Rates, is the Hong Kong equivalent of IAS 21; the HKICPA states there are no major textual differences between the two.

• On initial recognition: a foreign currency transaction is recorded at the spot exchange rate between the functional currency and the foreign currency at the date of the transaction.
• At period end: foreign currency monetary items are translated at the closing rate, defined as the spot exchange rate at the end of the reporting period.
• Averages: a rate that approximates the actual rate is often used for practical reasons, for example an average for a week or a month. If exchange rates fluctuate significantly, an average for the period is inappropriate.
• Translation to a presentation currency: assets and liabilities at the closing rate, income and expenses at transaction-date rates or a period average as an approximation.

The standard does not name a rate source. That choice is an accounting policy: pick one official series, document it and apply it every period.

Which Hong Kong series to use

Pull the figures yourself

# the HKMA table for a closing date
curl "https://allratestoday.com/api/v1/central-bank/hkma/2025-12-31" \
  -H "Authorization: Bearer YOUR_API_KEY"

# a quarter of daily USD figures as CSV, for an average
curl "https://allratestoday.com/api/v1/central-bank/hkma/history?symbol=USD&from=2026-01-01&to=2026-03-31&format=csv" \
  -H "Authorization: Bearer YOUR_API_KEY"

# this morning's HKAB table
curl "https://allratestoday.com/api/open/central-bank/hkab"

The dated response carries requested_date and rate_date. When a year-end falls on a day without a table, rate_date shows the earlier table that was returned, so the working paper records the fallback. Dated tables and history are on paid plans; add ?format=csv, xml or xlsx to any table endpoint.

Averages for the income statement

Averaging the HKMA daily series gives these Hong Kong dollar rates:

These are simple averages of the daily figures. The Inland Revenue Department posts its own average rates for tax returns, which can differ slightly; see the profits tax guide.

The HKAS 21 wording above was read from the HKICPA handbook copy revised in September 2018. Confirm against the current handbook before quoting it in a policy document.

FAQ

What was the USD/HKD rate on 31 December 2025?

The HKMA daily series shows 7.7840 Hong Kong dollars per US dollar on 31 December 2025.

What was the USD/HKD rate on 31 March 2026?

The HKMA daily series shows 7.8390 Hong Kong dollars per US dollar on 31 March 2026.

Which rate does HKAS 21 require at the year-end?

Foreign currency monetary items are translated at the closing rate, the spot exchange rate at the end of the reporting period. HKAS 21 does not name a rate source.

Can I use an average rate under HKAS 21?

A rate that approximates the actual rate at the date of the transaction, such as an average for a week or a month, is often used for practical reasons. If rates fluctuate significantly an average is inappropriate.