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Double Taxation Treaties and Foreign Assets: In Depth

How the Netherlands avoids taxing your foreign assets and income twice: why treaties matter, which country may tax what, the exemption and credit methods and how the relief is calculated, a worked Box 3 example with a foreign apartment, the 56 countries the calculator covers, countries without a treaty, US citizens, and what to document.

← Tax GuideExpats and international12 min readUpdated 18 Oct 2026
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1Treaties in a nutshell

Infographic: how Dutch treaty relief works for foreign assets

2Which country may tax what?

Usually taxed byDutch relief
Real estate abroadThe country where it isExemption
Foreign bank accountsThe Netherlands (residence country)Credit for any foreign tax withheld
Foreign shares and fundsThe NetherlandsCredit for dividend tax withheld abroad
Salary for work done abroadOften the country where you workExemption, with progression
Foreign pensionDepends on the treaty and type of pensionVaries

3Exemption or credit

Exemption method (vrijstellingsmethode)
The part of the Dutch Box 3 tax that belongs to the foreign assets is removed entirely.
Credit method (verrekeningsmethode)
The foreign assets stay in the Dutch tax base, but Dutch tax is reduced by the foreign tax paid, at most the Dutch tax on those assets.
  1. 1Total Box 3 taxon all assets
  2. 2Foreign sharenotional yield abroad ÷ total yield
  3. 3Reliefthat share of the tax
  4. 4Tax duewhat is left

4Worked example: an apartment abroad

Savings in the Netherlands
€100,000
Apartment abroad
€200,000
Box 3 tax before relief
€3,835
Relief for the apartment (exemption)
− €3,465
Box 3 tax after relief
€370

5The countries the calculator covers

All 56 listed countries
Real estate: exemption. Bank accounts, shares and other investments: credit for tax withheld abroad.
Which countries
Argentina, Australia, Austria, Belgium, Bosnia and Herzegovina, Brazil, Bulgaria, Canada, China, Croatia, Czech Republic, Denmark, Egypt, Ethiopia, Finland, France, Germany, Ghana, Greece, Hong Kong, Hungary, India, Indonesia, Ireland, Israel, Italy, Japan, Latvia, Lithuania, Mexico, Morocco, New Zealand, Nigeria, North Macedonia, Norway, Pakistan, Philippines, Poland, Portugal, Romania, Serbia, Slovakia, South Africa, South Korea, Spain, Sri Lanka, Sweden, Switzerland, Thailand, Tunisia, Turkey, Ukraine, United Kingdom, United States, Venezuela and Vietnam: each has a treaty in force and at least 5,000 residents in the Netherlands.
Any other country
Choose "Other": real estate is still exempt under the Dutch unilateral decree (Bvdb 2001).

6Special cases

US citizens

The same Dutch relief applies, but the US also taxes its citizens on worldwide income wherever they live. See the US-Dutch double tax calculator.

No treaty

The unilateral decree (Besluit voorkoming dubbele belasting 2001) gives exemption for real estate and credit for other income, much like a treaty.

Renting out a foreign home

The rent is taxed where the home is; in the Netherlands the home stays in Box 3 with exemption.

7Documentation you need

Keep for at least seven years0 of 5 done

8Common questions

Do I declare a foreign property I do not rent out?

Yes, at its value on 1 January; the relief then removes the Dutch tax on it.

Which exchange rate do I use?

The rate on the reference date (1 January) for Box 3, from a reliable source such as the ECB.

Is a foreign mortgage deductible?

In Box 3 it counts as a debt against your assets above the debt threshold; it is not deductible in Box 1.

What about my first year?

See your first year as an expat.

Sources

This article is based on these official pages. If anything here differs from them, the official page is right.

Ready to run your own numbers?

Full tax calculator with treaty relief
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