Exchange rates for income declaration in France
Strictly speaking, you are meant to use the Banque de France exchange rate on the day the money was received by yourself
It is often found to be more convenient to use an average rate for the year, which is permitted
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Income declaration season is approaching (the website opened on April 9), and with it the question of what exchange rate to use if you received income in foreign currencies in 2025.
Strictly speaking, you should use the Banque de France exchange rate on the day you received the money. You can find these at banque-france.fr by searching for parités quotidiennes.
However, where people have regular income, it is often more convenient to use an average rate for the year, which is permitted.
Officials at the central tax authority DGFiP have told The Connexion that the following method is acceptable: take the Banque de France rates at the end of December of the tax year in question (2025) and for December of the previous year (2024). Next, find a 2025 average rate by adding these together and dividing by two.
You need end-of-December figures for this calculation, so search on the bank’s website for tables of taux de change fin de mois to bring up the data you need (do not use tables of average rates for each month, which also exist).
The two relevant rates added and then divided by two give the average rate from the euro to the other currency.
This can then be converted to a foreign-currency-to-euro rate by dividing the number 1 by the rate.
By using this method, for the year 2025 we obtain the following average rates for some common currencies received by readers:
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£1 = €1.175
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$1US = €0.903
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$1AUS = €0.582
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$1CAN = €0.644
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$1NZ = €0.514
