US Pensions in the Netherlands: How Are 401(k)s, IRAs and Roth Accounts Taxed?

You built up retirement savings in the United States, and now you live in the Netherlands, or you are about to move. You may have a 401(k) from a former employer, a traditional or rollover IRA, a Roth account or a US government pension. The question that comes with them: does the Netherlands tax this every year, or only when you start receiving money?

For a US pension in the Netherlands, the label on the account does not decide that on its own. What matters is how the arrangement is classified under Dutch law and the tax treaty. That classification decides whether your entitlement stays outside Box 3, with tax deferred until benefits are paid, or whether you report its value every year as an asset.

This article is for individuals moving to or from the Netherlands, or already living here, who hold pension entitlements built up abroad, and US retirement accounts in particular.

The short answer:   – Pre-tax employer plans: a traditional 401(k) and the pre-tax portion of a 403(b) will often qualify for deferred pension treatment. The entitlement is then generally outside Box 3, and distributions are assessed in Box 1 when you receive them, subject to the treaty. – Traditional and rollover IRAs: may also qualify for deferred retirement treatment. A tax-neutral US rollover does not, by itself, guarantee tax neutrality in the Netherlands. – Roth accounts and inherited accounts: need a separate assessment. Roth IRAs are often reported in Box 3 in Dutch practice, but that is not a universal conclusion. – US Social Security: generally taxable exclusively in the United States under the treaty. You still include it in your Dutch return where required, and then claim treaty relief. – US government pensions: as a general rule taxable exclusively in the United States, with an exception for residents who are also Dutch nationals. – Brokerage, savings and checking accounts: generally Box 3.

Start with the quick scan: is your foreign pension comparable to a Dutch pension?

In practice, we start with what we call a “quick scan”. It does not replace a full legal analysis, but it gives a useful first indication of how the Netherlands may treat your foreign pension for income tax purposes. The quick scan asks two questions.

1 Was the build-up tax-facilitated?

Dutch pension schemes work with the so-called omkeerregeling: qualifying contributions are not taxed when they are made, and benefits are taxed when they are paid out. So if your contributions were funded pre-tax, or you received a deduction for them in the country of origin, those are important indicators.

The fact that your employer paid a contribution is not enough by itself. The actual tax treatment and your contribution history must be established.

2 What is the arrangement for, and can you get to the money?

Dutch pension rules generally restrict access before retirement and limit surrender. Foreign withdrawal rules may differ, including possibilities for early access subject to tax or penalties. Those differences need to be examined, but they do not automatically disqualify a foreign arrangement. The relevant statutory category, the foreign tax treatment and the applicable treaty must be considered together.

What the quick scan tells you, and what it does not

Dutch law specifically recognises certain foreign pension arrangements under Article 1.7 of the Income Tax Act 2001. Distributions from such arrangements may be taxable in Box 1 under Article 3.82. If you can substantiate that your pension rights were previously subject to a comparable income tax, the extent of Box 1 taxation needs further analysis. After-tax funding, access restrictions and any specific exemption should be assessed together, not used as automatic labels for Box 1 or Box 3. [1]

Together, these two questions give a practical starting point. They are not an exhaustive legal test: a foreign arrangement does not need to reproduce every feature of a Dutch pension. Where deferred pension treatment applies, your entitlement generally stays outside Box 3, and taxation is considered when you receive benefits. For more on Box 3, read our articles on the Dutch Box 3 wealth tax and recent developments and the Box 3 actual-return procedure.

How does the Netherlands–US tax treaty apply to pensions?

As a tax resident of the Netherlands, your pension income is part of the worldwide income in your Dutch tax return. Benefits from a qualifying foreign pension are generally assessed in Box 1 as income from former employment when you receive them. That is subject to the treatment of any previously taxed contributions and to the treaty.

This domestic starting point does not automatically mean the Netherlands can ultimately tax every payment. The Netherlands-US treaty distinguishes between private pensions, social security benefits and government pensions. The form of a payment matters too: whether it is a periodic benefit or a lump sum can affect who may tax it.

Private US pensions

Under Article 19(1), private pensions paid in respect of former employment are in principle taxable in the recipient’s state of residence. As a Dutch treaty resident, you will therefore generally be subject to Dutch tax on a private US pension.

However, Article 19(2) can also permit US taxation of certain non-periodic payments connected with employment there, if you were US-resident within the preceding five years. If you are a US citizen, the US saving clause can also be relevant. [2]

Lump sums and the reverse tax credit

Where a lump-sum payment falls within Article 19(2), Article 25(7) provides for a “reverse tax credit”. The former state of residence grants credit for tax imposed on that payment by the current state of residence, subject to the treaty’s credit limit. If you live in the Netherlands and receive a qualifying US pension lump sum, this generally means the United States grants credit for the Dutch tax, rather than the Netherlands granting credit for the US tax.

US Social Security benefits

US Social Security benefits are an important exception. Under Article 19(4), they are generally taxable exclusively in the United States. You still include them in your Dutch return where domestic law requires it, and then claim treaty relief. Keep in mind that the income tax exemption does not automatically settle the separate position for Dutch social security contributions or the income-related healthcare contribution. [2]

If you are a US citizen living in the Netherlands

If the United States also taxes a private pension distribution because you are a US citizen, that does not automatically entitle you to a Dutch credit for the US tax. The treaty’s saving clause and double tax relief provisions must be applied together, and relief may need to be claimed in the United States, including through the relevant credit and source rules. A different analysis can apply where the treaty itself also permits source-state taxation, such as for certain lump sums. [2]

Why a US pension needs extra care

Pension systems differ significantly across countries, and especially in the United States. US pension arrangements often combine features that resemble Dutch pensions with elements that do not exist under Dutch law. So the Dutch tax treatment of your US pension needs an assessment under Dutch law, and a careful application of the tax treaty between the Netherlands and the United States, including the rules on who may tax and how double taxation is avoided.

How are different US retirement accounts taxed?

Traditional 401(k)

Employer-sponsored plans such as a traditional pre-tax 401(k) generally align closely with the Dutch pension concept. Contributions are typically made from pre-tax income, and access to the pension capital is restricted, subject to exceptions and additional tax for certain early withdrawals. As a result, these plans will often qualify for deferred pension treatment. In that case, the entitlement itself is generally outside Box 3, and distributions are assessed in Box 1 when you receive them, subject to the treaty.

403(b)

A similar analysis generally applies to the pre-tax portion of a 403(b) plan, commonly used by employees of non-profit organisations, educational institutions and hospitals. Although less familiar outside the United States, its fiscal and legal characteristics are broadly comparable to those of a traditional 401(k). From a Dutch tax perspective, a qualifying 403(b) plan will therefore generally receive deferred pension treatment: no Box 3 taxation during accumulation, and Box 1 taxation on distribution. Any designated Roth portion should be assessed separately.

Traditional IRA

Traditional Individual Retirement Accounts (IRAs) may also qualify for deferred retirement treatment under Dutch tax law. They are individual rather than employer-based arrangements, but they generally benefit from tax deferral during the build-up phase and impose tax consequences on certain early withdrawals. For you as a Dutch tax resident, a qualifying arrangement generally means exclusion from Box 3 during accumulation and Box 1 taxation on distribution.

What to check: the account’s origin and any non-deductible contributions.

Rollover IRA

This treatment may extend to rollover IRAs. If you transfer capital from a 401(k) or similar plan to an IRA, the Dutch treatment depends on the receiving arrangement as well as the original entitlement. A tax-neutral US rollover does not, by itself, guarantee tax neutrality in the Netherlands. The Belastingdienst has confirmed that a transfer between qualifying foreign pension arrangements can be tax-neutral where it is also tax-neutral under the relevant foreign law. [1]

What to check: the conditions, before you make the transfer.

Roth IRA, Roth 401(k) and Roth 403(b)

Roth arrangements, including Roth IRAs and designated Roth accounts in 401(k) or 403(b) plans, need a separate assessment. They are generally funded from after-tax income, and qualifying withdrawals can be exempt from US federal income tax. Roth IRAs are often reported in Box 3 in Dutch practice, but that is not a universal conclusion for every Roth arrangement. The potential relevance of domestic pension exemptions and Articles 19(7) and 19(11) of the treaty must be considered. And a favourable individual agreement for another account holder does not establish an exemption for you. We will discuss these issues in a separate article on Roth IRAs and Box 3. [3]

Inherited US retirement accounts

Inherited US retirement accounts also need their own review. The original account’s character is relevant, but so are your entitlement as beneficiary, the contribution history, and the form and timing of distributions. An inherited IRA should not automatically be given the same Dutch tax treatment as the deceased person’s account, and an inherited Roth account should not be classified solely by its name.

US government pensions in the Netherlands: a separate treaty rule

US government pensions form a distinct category under the treaty between the Netherlands and the United States. They relate to services rendered to a government or a government body, and a specific treaty provision applies that deviates from the general rule for private pensions.

They may include pensions connected with federal, state or local government service, including civilian or military employment. Article 20(2) concerns pensions paid by, or out of funds created by, a government or qualifying public authority in respect of services rendered to that body. Both the origin of your entitlement and the treaty’s payment conditions should be examined. Having worked for a public-sector organisation does not automatically settle the classification. [2]

As a general rule, a pension within Article 20(2) is taxable exclusively in the government’s state. If you live in the Netherlands and receive a qualifying US government pension, this generally means the United States has the taxing right and the Netherlands grants the appropriate treaty relief. The income may still be relevant to progression or contribution calculations, depending on your circumstances.

There is an exception. Article 20(2)(b) applies where the recipient is a resident and national of the other state, so if you are a Dutch national living in the Netherlands, your position can differ. Dual nationality and the saving clause need particular care, and pensions connected with a business carried on by a government can fall under the ordinary pension rules. A careful analysis of your employment history and the treaty provisions remains necessary. [2]

And Box 3? The accrued value of a qualifying government pension will generally stay outside Box 3 under the applicable domestic classification. The treaty separately determines who may tax the benefits. These are related questions, but the fact that the United States taxes a payment is not, by itself, the legal basis for keeping an entitlement out of Box 3.

What happens to US investment accounts and savings?

If you are relocating from the United States, you probably also hold financial products that do not qualify as pensions under Dutch tax law. These are assessed separately and are frequently subject to Box 3.

• Investment accounts holding mutual funds, brokerage assets or money market funds are generally treated as regular investment assets, in Box 3 for an ordinary Dutch resident taxpayer.
• Savings and checking accounts with US financial institutions also generally fall within Box 3.
• Health Savings Accounts (HSAs) should be reviewed separately. US healthcare-related tax relief does not automatically create a Dutch exemption.
• Life insurance policies need a more detailed look at their terms, any surrender value and possible exemptions or transitional rules. A policy with an investment component can have a Box 3 value, while pure risk cover may be treated differently. The right treatment should be established for your specific contract.

Common mistakes when reporting US retirement accounts

The Dutch taxation of foreign pensions is driven by substance, not labels. These are the assumptions we see cause trouble:

• “It is called a pension, so it is a pension here.” The foreign label alone does not decide the Dutch treatment.
• “The rollover was tax-neutral in the US.” That does not, by itself, make it tax-neutral in the Netherlands.
• “A Roth is a Roth.” Roth IRAs are often reported in Box 3, but that is not a universal conclusion for every Roth arrangement.
• “An inherited IRA keeps its old treatment.” Not automatically. The beneficiary’s entitlement and the distributions matter too.
• “My Social Security is exempt, so that is the end of it.” The income tax exemption does not automatically settle Dutch social security contributions or the income-related healthcare contribution.
• “I paid US tax, so I get a Dutch credit.” For US citizens, not automatically. Relief may need to be claimed in the United States.

Getting the qualification wrong can result in double taxation or incorrect Box 3 reporting. Pension savings are long-term and usually significant, so a careful and timely assessment pays off, ideally before you move.

How Dutchtaxadvice can help

We look at your accounts. Which US pensions and accounts you hold, how they were funded, what the plan rules allow, and what you have withdrawn or plan to transfer.

We tell you where you stand. Account by account: pension or Box 3, who may tax the payments under the treaty, and where relief needs to be claimed. If an account needs more than the quick scan, we tell you that too.

We arrange it. Your Dutch tax return reports each account correctly, with treaty relief claimed where it applies.

We keep it running. When you start drawing benefits, plan a rollover or inherit an account, we look at it again. You will hear from us before you have to ask.

Moving to the Netherlands with US retirement savings?

We go through your US accounts with you and tell you how each one should be treated in your Dutch tax return, before you file. Start through the Expat Hub or book a tax consult, and tell us which accounts you hold.

Sources

• wetten.overheid.nl: Dutch Income Tax Act 2001 (Wet inkomstenbelasting 2001), Articles 1.7, 2.14 and 3.82. See also Belastingdienst position KG:041:2024:1 on transfers between qualifying foreign pension arrangements.
• IRS: Netherlands-US tax treaty documents and official technical explanations. See Articles 19, 20, 24 and 25.
• IRS: 2004 Protocol and official explanation, Article 19(7) and (11), and the Belastingdienst: competent authority agreement on Article 35.

Information checked on 22 October 2026. This article gives a general overview. The treatment of a particular account or payment depends on its terms, contribution history, the relevant law and your circumstances.

Frequently asked questions about US Pensions in the Netherlands