I'm Dutch, working in the US — what taxes apply when I move back to the Netherlands?
Short answer: A Dutch professional returning from the US becomes a Dutch resident taxpayer on worldwide income and assets. US brokerage accounts and most savings fall into Box 3, taxed on a deemed or actual return each year. A 401(k) is generally treated as a pension under the US–Netherlands treaty, and RSUs that vested for US work are allocated between the two countries.
Written and reviewed by Anthony Walsh, Selanis. Last reviewed 2026-10-06.
Why it works this way
The Netherlands taxes savings and investments through Box 3, which looks at the value of your assets on 1 January rather than what you actually sold. Since the Supreme Court rulings from 2021 onwards, the system has moved toward taxing actual returns, and the transition rules change year by year. For someone arriving with a large US portfolio, that means the portfolio is taxed whether or not you sell anything.
US retirement accounts are usually treated as pension rights under the treaty rather than Box 3 assets, so growth is not taxed annually and withdrawals are taxed in the country of residence when paid. The details — especially for Roth accounts and lump sums — need checking against the treaty text and the Belastingdienst's current position.
Returning Dutch nationals generally cannot use the 30% ruling, because it requires that you were recruited from abroad and lived more than 150 km from the Dutch border for most of the 24 months before starting work. Years in the US can satisfy the distance test, so it is worth checking rather than assuming you are excluded.
The expensive mistake: Arriving with a large taxable US portfolio on 1 January
Box 3 is measured on 1 January. Arriving in December with a large US brokerage account means a full year of Box 3 on it immediately. Timing the move date, and deciding beforehand what to sell while US capital gains rates still apply, changes the first-year bill.
What to do
- Check whether the 30% ruling is open to you — Count the months you lived more than 150 km from the Dutch border before your new Dutch job starts, and make sure the employer applies within four months of your start date.
- Separate pension assets from Box 3 assets — List what is a 401(k), IRA or Roth (likely treaty pension treatment) and what is a taxable brokerage account (Box 3).
- Decide what to sell before 1 January — Model realising gains while still US resident against carrying the positions into Box 3.