Currency Exchange and FIRPTA: Calculating Gains in Foreign Currency
DVC contracts are priced and sold in US dollars. For international sellers, the need to convert between currencies adds a layer of complexity to both the US and home-country tax calculations. Here is how it works.
For US Tax Purposes: All in USD
Your Form 1040-NR is filed in US dollars. Your purchase price, sale price, and gain are all reported in USD. You do not need to convert anything for US tax purposes. The US only cares about the dollar amounts on the transaction.
This is actually simpler than it sounds. If you paid $20,000 USD for a DVC contract five years ago and sold it for $26,000 USD, your US gain is $6,000 USD. Regardless of how many British pounds, Canadian dollars, or Australian dollars that represents, the US tax is 15% of $6,000 USD = $900 USD.
For Home-Country Tax Purposes: Conversion Required
Most countries tax their residents on worldwide income and require all amounts to be reported in the local currency. This is where currency movements matter enormously.
You must convert both the purchase price and the sale price to your home currency using the exchange rate on each transaction date. The gain you report to your home tax authority is calculated from those converted figures, not simply by converting the USD gain to local currency.
Why This Creates a Different Gain Than Expected
Say a UK seller purchased a DVC contract for $24,000 USD in 2019 when the rate was £1 = $1.30. Their GBP cost basis was £18,462. In 2026, they sell for $32,000 USD when the rate is £1 = $1.25. Their GBP proceeds are £25,600. Their GBP gain is £7,138 — even though their USD gain was only $8,000. The weaker pound in 2026 means each US dollar is worth more in GBP terms, inflating the UK-side gain.
Use the Central Bank Rate
Most tax authorities require you to use the central bank exchange rate on each transaction date. Bank of Canada for Canadians, Reserve Bank of Australia for Australians, HMRC published rates for UK filers. Do not use an average annual rate or your personal bank's posted rate. Always use the daily rate from the authorized source on the exact date of each transaction.
