Foreign currency transactions are increasingly common for Australian small businesses — purchasing software subscriptions from US companies, selling digital products to international customers, paying overseas contractors, or holding foreign currency balances. Each of these creates bookkeeping complexity that doesn't arise with purely domestic transactions.
This guide covers the key areas: how to translate foreign currency amounts to AUD, GST treatment of international transactions, and how to record foreign exchange gains and losses.
The translation requirement: all amounts must be in AUD
Australian tax law and accounting standards require that all financial transactions be recorded in Australian dollars (AUD). Foreign currency transactions must be translated to AUD at the exchange rate applicable at the time of the transaction.
The ATO accepts two translation methods:
Method 1: Actual exchange rate on the transaction date. Use the exchange rate on the date the transaction actually occurred. The ATO provides a public currency exchange rate tool (accessible via ato.gov.au) that can be used for this purpose. Most banks and currency services also publish daily rates.
Method 2: ATO average annual rate. For simplicity, the ATO allows use of the average exchange rate for the relevant income year. This is a flat rate applied to all transactions in that foreign currency for the entire year. Less accurate for volatile currencies, but administratively simpler.
Consistency is required within a tax year — you cannot switch between methods mid-year for the same type of transaction. Confirm with the tax agent which method the client is using.
GST on international transactions
The GST treatment of international transactions depends on whether the supply is made by an Australian business to an overseas customer, or by an overseas supplier to an Australian business.
Australian business selling to overseas customers
Export of goods: Goods physically exported from Australia are GST-free (zero-rated). The sale is recorded at the AUD equivalent of the foreign currency amount, with FRE as the GST code.
Export of services: Services supplied to a non-resident entity for use offshore are generally GST-free. The conditions are: the recipient is a non-resident, is not in Australia when the supply is made, and the supply is not connected to real property in Australia. Code as FRE.
Digital services to overseas consumers: If an Australian business supplies digital products (software, subscriptions, ebooks) to non-business consumers overseas, the supply is generally GST-free if the customer is outside Australia. However, GST may apply if there is Australian nexus.
Australian business buying from overseas suppliers
Imported goods: Goods imported into Australia with a customs value over $1,000 attract customs duty and GST collected by Australian Border Force at the border. The GST paid at the border is claimable as an ITC by GST-registered importers. Code the ITC as a capital acquisition (CAP) if it's a business asset, or GST for ordinary business inputs.
Goods under $1,000: Most overseas online purchases under $1,000 now attract GST at the point of sale, collected by the overseas vendor under Australia's Low Value Imported Goods (LVIG) legislation (in effect since July 2018). Many overseas vendors (Amazon, Adobe, Shopify) are registered for Australian GST and include it in their prices. An overseas vendor must show their ABN on the invoice for the ITC to be claimed — check the invoice before claiming.
Services from overseas providers (reverse charge): Business-to-business supply of intangible services from overseas (cloud software, consulting, professional services) may be subject to the GST "reverse charge" mechanism. The Australian recipient is treated as if they made a taxable supply to themselves. In practice, the reverse charge mainly applies to larger businesses and financial institutions. Most small businesses using overseas software don't need to worry about this.
Practical coding for overseas software subscriptions (e.g., Slack, Dropbox, AWS):
- If the invoice shows an Australian ABN and GST amount: code as GST, claim ITC
- If no ABN or GST listed: code as N-T (no ITC available)
Foreign exchange gains and losses
When a business pays an overseas invoice in foreign currency, the amount actually paid in AUD may differ from the amount originally recorded in AUD (because exchange rates fluctuate between invoice date and payment date). This difference is a foreign exchange gain or loss.
Example:
Client receives an invoice from a US supplier on 1 March for USD $5,000. At that date, the AUD/USD exchange rate is 0.65, so the liability is recorded as AUD $7,692.
The client pays on 15 March when the exchange rate is 0.62. The actual AUD cost of USD $5,000 at 0.62 = AUD $8,065.
The client spent $8,065 AUD but had recorded a liability of $7,692. The difference of $373 is a foreign exchange loss — it cost more AUD than anticipated to settle the USD liability.
If the rate had moved the other way (e.g., to 0.68), the client would have paid AUD $7,353 against a recorded liability of $7,692 — a foreign exchange gain of $339.
How to record FX gains and losses in bookkeeping:
- Record the initial transaction at the ATO-approved exchange rate on the transaction date
- When the payment is made at a different rate, record the payment at the actual AUD paid
- The difference between the two amounts posts to a Foreign Exchange Gains/Losses account (income or expense depending on direction)
FX gains are assessable income; FX losses are generally deductible (subject to the taxpayer's overall FX tax election position). The tax treatment of FX differences is complex for businesses with large foreign currency exposures — refer to the tax agent.
Maintaining foreign currency balances
Some clients maintain bank accounts or PayPal balances in foreign currencies. At year-end, these balances must be translated to AUD at the exchange rate on 30 June (or the business's year-end date) for balance sheet purposes.
The translation adjustment — the difference between the year-opening balance in AUD and the year-closing balance in AUD for the same number of foreign currency units — is an unrealised FX gain or loss. Treatment:
- For most small businesses on a simplified tax basis: unrealised FX gains and losses are not recognised until the balance is realised (withdrawn or converted)
- For businesses on the standard accruals tax basis: unrealised FX is recognised annually as assessable income or deductible loss
This is another area where the tax agent's guidance on which FX election the client is on determines the bookkeeping.
Practical tips for managing foreign currency bookkeeping
Capture exchange rates at the time of transaction. Do not try to apply an exchange rate 3 months after the fact. Set up a process where all foreign currency invoices are converted to AUD at the transaction date rate when they are received.
Request ABN invoices from Australian-registered overseas suppliers. If an overseas supplier is registered for Australian GST, their invoices should include an ABN. Without it, you cannot claim the ITC. Email the supplier and request an updated invoice if the ABN is missing.
Separate FX gains and losses in the Chart of Accounts. Use dedicated income and expense accounts for FX gains and losses — do not mix them into general income or general expenses. The tax agent and the business owner both need to see FX impacts clearly.
Use accounting software FX features where available. Xero, MYOB, and most modern accounting platforms have multi-currency modules that automate translation and track unrealised FX differences. These reduce manual calculation errors significantly.
This article was last reviewed on 27 May 2026. GST treatment of international transactions and FX tax elections are complex. Always confirm with a registered tax agent. This is general guidance, not specific tax or legal advice.