Property in the United Kingdom
A house, flat or land in the United Kingdom counts in your Box 3 wealth at its value on 1 January. Under the treaty the United Kingdom may tax that property, and the Netherlands exempts the share of Box 3 tax that falls on it.
So you usually pay no Dutch tax on it, but you still have to declare it. It also counts when the tax-free allowance is spread over your assets, so your other wealth can be taxed slightly more.
Bank accounts and investments in the United Kingdom
Savings, deposits, shares and funds in the United Kingdom stay taxable in Dutch Box 3, just like assets here. The Netherlands is your country of residence and keeps the right to tax them.
If the United Kingdom withheld tax on interest or dividends, it's credited against the Dutch tax on that slice, up to that Dutch tax and the rate the treaty allows.
Converting and declaring
Convert amounts to euros at the exchange rate on 1 January of the tax year. Keep a year-end statement from the bank or broker and a valuation of any property.
Many countries automatically share account information with the Belastingdienst. If you left foreign assets out in earlier years, correcting it voluntarily usually means a lower fine than if the Belastingdienst finds it first.
Money from family in the United Kingdom
Gifts from parents or relatives living in the United Kingdom are not subject to Dutch gift tax, unless the giver is a Dutch national who left the Netherlands less than 10 years ago. From the next 1 January the money does count in your Box 3.
What the United Kingdom itself taxes
- Council tax stays payable on a UK home, and rent from it is taxed in the UK. Register with HMRC under the Non-Resident Landlord Scheme; otherwise the letting agent (or a tenant paying more than £100 a week) has to withhold basic-rate tax from the rent.
- Since 2015 non-residents pay UK capital gains tax on selling UK residential property, and it has to be reported to HMRC within 60 days of completion.
Your accounts and products in the United Kingdom
- Premium Bonds, cash ISAs and easy-access accounts count as savings in Box 3; a stocks-and-shares ISA or general investment account counts as investments.
- A workplace pension or SIPP is usually treated as a pension right, not Box 3 wealth, but drawing a lump sum while living here is taxed in the Netherlands. Get advice before taking money out.
Common situations
- Inheriting from parents who lived in the United Kingdom: there is no Dutch inheritance tax when the person who died lived abroad (unless they were a Dutch national who left the Netherlands less than 10 years before). What you inherit counts in your Box 3 from the next 1 January.
- Kept your UK home and let it out? Declare it in Box 3 (relief applies) and the rent in your UK return, not in the Dutch one.
Worked example (2026)
You live in the Netherlands, single, with € 25.000 in a Dutch savings account. In the United Kingdom you own a home in Manchester worth € 280.000 and € 30.000 in a cash ISA.
The home still raises the tax a little: it counts when the tax-free allowance is spread over everything you own. The tax the United Kingdom levies on the home itself comes on top. Sources: belastingdienst.nl, gov.uk (HMRC).
Specific to the United Kingdom
- ISAs are not tax-free in the Netherlands. Once you live here, the value of a cash or stocks-and-shares ISA counts in Box 3 like any other savings or investments.
- UK banks pay interest without withholding tax, so there is usually no UK tax to credit on savings. The Dutch Box 3 tax on them is due in full.
- UK property is exempt from Box 3 tax under the treaty; rent from it is taxed in the UK.
Keep calculating
General information based on Dutch treaty practice for Box 3. Your own situation may differ; have foreign assets checked by an adviser if in doubt.