Double taxation and tax treaties: freelancing in the Netherlands with clients or income abroad

If you live in the Netherlands, you declare your world income here: the rent from your flat in Lisbon, the dividend from your American broker, and the salary you earned back home in January. That does not mean you pay twice on everything. What a tax treaty actually does, how the relief for double taxation works in your Dutch return, and when to stop guessing and hire an adviser.

As a resident you declare your world income

The Dutch Tax Administration puts it in one line: you declare your Dutch and your foreign income, and together that is your world income. If you live in the Netherlands, that is your starting point. Not your nationality, not where your clients are, not where your bank is: where you live.

Living here is not a checkbox. The tax administration looks at where the centre of your life is: where you sleep, where your family is, where you are insured, where you work. If you are registered in the Personal Records Database and you live and work here, you are almost certainly a resident for tax purposes.

So all of this lands in your Dutch return: the rent from a flat abroad, a savings account back home, dividends from a foreign portfolio, and salary you earned before you moved. Declaring is not the same as paying. The rest of this article is about that difference.

What a tax treaty does, and does not do

The Netherlands has a tax treaty with a large number of countries. A treaty does not impose tax. It divides taxing rights: per type of income it says which country may tax it, and which country has to step back.

Roughly:

• Real estate is taxed where the property sits. Your flat in Lisbon is taxed by Portugal, even though you live in Utrecht.
• Employment income is usually taxed where you physically do the work.
• Business profit belongs to the country where your business is, unless you have a permanent establishment in the other country: a fixed place of business from which you carry on (part of) your work.
• Dividends, interest and royalties can often be taxed in both countries, with the source country allowed to withhold up to a capped rate.

Which agreements apply to your country is listed in the Verdragsstaten ingezetenen overview on belastingdienst.nl. If there is no treaty with that country, separate Dutch rules apply to limit double taxation, and that is one of the cases where you want someone to look over your shoulder.

The relief for double taxation in your return

When the treaty gives the taxing right to the other country, that income still counts in the Netherlands when your tax is calculated, but you get relief for it. The Tax Administration's own wording: you may be entitled to relief for double taxation if, under a tax treaty, you have to pay tax in the country the income comes from.

The relief is calculated in one of two ways, depending on the type of income.

The exemption method. The Netherlands works out the tax on your whole income and then deducts the share attributable to the foreign part. The ratio does the work. The Tax Administration's own example: if your taxable box 1 income is € 25,000, of which € 15,000 comes from Germany, and the calculated income tax is € 1,250, then the relief is € 15,000 / € 25,000 x € 1,250 = € 750. This method usually applies to wages, and for real estate in box 3 it always applies.

The credit method. Here the foreign tax you actually paid is credited against your Dutch tax. There is a ceiling, the proportionality limit: never more than the share of your Dutch tax attributable to that income. This method applies to dividends, interest and royalties.

There is a safety net underneath. If your relief in a year is larger than the tax you owe, the remainder carries forward to a later year. You do not have to ask for that; the Tax Administration applies it automatically.

One thing to be clear about: the relief does not appear by itself once you type in an amount. In your return you separately state which part of your income comes from which country and how much tax you paid there. So keep your foreign assessments and dividend statements. Without paper there is nothing to credit.

The year you arrived: the M-form

If you moved to the Netherlands part way through a year, you file an M return for that year: one return combining the months outside the Netherlands and the months inside it. Your foreign income from before the move belongs in it, with the relief applied. How that works is in the M-form. In later years you file the ordinary income tax return for freelancers.

Clients abroad: two separate questions

Working from the Netherlands for a client in Berlin, New York or Singapore raises two questions that get tangled together and have nothing to do with each other.

The VAT question. Do you charge VAT, or do you reverse charge it? That depends on where your client is and whether they are a business. See invoicing abroad. If you invoice in another currency, the exchange rate matters too: see invoicing in a foreign currency.

The income tax question. This one is almost always boring: you work from the Netherlands, so your profit is Dutch profit. A foreign client changes nothing about that. Only when you acquire a permanent establishment in the other country, a fixed place from which you carry on (part of) your business, can that country start taxing a share of your profit. A laptop on an Airbnb table is not that. A rented office where you work for months can become it.

If a foreign client or platform does withhold tax on your invoice, do not let it slide. Ask for proof of withholding and check whether the treaty even allows it. There is often a reduced rate or an exemption you have to claim in advance, and reclaiming afterwards is slow work.

Income from your home country

Three situations come up constantly among internationals.

• A rented-out property. In the Netherlands it sits in box 3, and the country where the house stands may tax it. You declare the property and the mortgage in your return and get the exemption method. Often that means no net Dutch tax on that part, but it does affect your box 3 calculation.
• Employment income. If you were still on a payroll back home for part of the year, that country usually gets to tax it, and you declare it here with the exemption method.
• Dividends and interest. Foreign securities and savings belong in box 3. The withholding tax the other country takes is credited in your return, up to the maximum in the treaty. If the bank withholds more than the treaty allows, you do not recover the excess in the Netherlands but from that country itself.

Watch the other side too: pension accrual, annuities and capital gains can have their own treaty articles, and those genuinely differ per country. Do not go by feel here.

If you are American, you always file twice

The United States taxes its citizens on the basis of nationality. Live in the Netherlands with a US passport or a green card, and you remain obliged to file a US return on your worldwide income, however long you have been here. The IRS grants people living abroad an automatic two-month extension, to 15 June.

On top of that there are reporting duties for your foreign accounts: the FBAR and the FATCA report on Form 8938, each with its own thresholds and its own penalties. They are named here so you know they exist. What they mean in your case is a question for someone who does American returns for a living. The treaty between the Netherlands and the US keeps you from paying twice on the same income, which is not the same as being spared filing twice.

When you need an adviser

The ordinary return of a freelancer who lives here and works here is fine to do yourself. Bring someone in as soon as:

• you are in your year of arrival or departure and there is also a business in the return;
• you own property, a pension pot or a substantial shareholding abroad;
• a foreign client withholds tax and you are not sure they are allowed to;
• you physically work in another country for more than a few weeks a year;
• you are a US citizen.

Getting it right once is usually enough. In the years after, the same pattern repeats and you can handle it yourself.

How Finq helps

Finq runs your Dutch administration: revenue, expenses, hours and your VAT return, entirely in English if you want. Invoices in dollars, pounds or Swiss francs are converted to euros automatically, so the revenue in your reports and your VAT return is right.

What Finq does not do is work out your foreign income or fill in your relief for double taxation. What it does do is have the Dutch part of your return, the profit from your business, ready as a yearly overview you can hand straight to your adviser. See the accounting software.

This is general information, not personal tax advice. Sources, checked on 6 September 2026: belastingdienst.nl on living in the Netherlands with foreign income, on the relief for double taxation (exemption and credit method) and the Verdragsstaten ingezetenen overview; irs.gov on the filing obligation of US citizens abroad. Check your own situation on belastingdienst.nl or with an adviser.