Tax in Denmark: high, but predictable

There is no misunderstanding about the Danish tax burden: it is high. What does surprise Dutch people is how clear the system is — and on which side of the border their pension remains taxed.

The structure: first 8%, then the rest

Every krone of earned income starts with 8% AM-bidrag, the labour-market contribution that is withheld before all other taxes. On what remains you pay state tax — a base rate of roughly 12%, with extra brackets for higher incomes — plus municipal tax of some 25% on average, differing per municipality. Church tax you pay only as a member. All in all, the burden on a middle income is noticeably above the Dutch one; against that, no separate healthcare or national insurance contributions come on top — healthcare is included.

The forskudsopgørelse: the advance assessment that decides everything

The system revolves around the forskudsopgørelse, your preliminary assessment. It determines your withholding percentage and goes automatically to your employer via the digital skattekort. If the advance assessment is right, your monthly salary is right and the annual settlement (årsopgørelse) is a formality — pre-filled, checked in minutes. If it's wrong, you pay too much or too little for months. So check it on arrival and every year in November, and adjust it at every change: different salary, mortgage, second job.

Two things for newcomers. Without a tax card your employer withholds the emergency rate: 8% plus 55% — reclaimable, but painful in the first months. And Denmark wants your foreign pension schemes reported on settling; that's a form, not a choice.

The treaty: the Netherlands keeps taxing

For pensioners and everyone with Dutch pension accrual this is the core. The tax treaty of 1996 tipped with the protocol of 2018: since then source-state taxation applies — the Netherlands taxes AOW (the Dutch state pension), occupational pension and annuity that come from the Netherlands. The residence-state taxation older Dutch guides write about now applies only to whoever already lived in Denmark and already received a pension before 9 May 2018.

Denmark meanwhile taxes your worldwide income and prevents double taxation via the treaty. How exactly those two systems interlock — and what it means for the municipal tax on your total income — is tailored work. Whoever leaves with a substantial pension plans one conversation before the move with a tax adviser who knows the treaty. That conversation costs a few hundred euros and prevents the most expensive category of surprises there is: the ones that come back every year.

Assets that stay behind in the Netherlands

Three rules from the same treaty for whoever keeps a house, shares or savings. A rented-out house in the Netherlands remains fully taxed in the Netherlands — income from immovable property belongs to the country where it lies (article 6). On dividends from a Dutch company the Netherlands as source state may withhold 15%; only for companies with a holding of at least 10% does an exemption apply (article 10). And interest is taxable exclusively in your state of residence — on Dutch savings interest only Denmark taxes (article 11). Denmark meanwhile counts all of this in the worldwide income on which the municipal tax is calculated.

What you concretely do

Apply for your tax card as soon as your contract is signed (it can be done a month ahead). Check the forskudsopgørelse in your first month. Report your Dutch pension schemes. And keep your Dutch annual statements — the M return for your year of emigration needs them, and it only comes the year after.