Americans in Denmark: the money questions
Americans in Denmark run into one structural problem more than any other: Denmark taxes most investment funds annually on unrealised gains (lagerbeskatning), while the US taxes on realisation and almost always treats the same non-US fund as a PFIC. Add the researcher tax scheme's flat rate, the 401(k)/IRA treaty position, and boafgift with no US estate tax treaty behind it, and the Danish chapter needs its own plan, not a generic expat checklist.
- Lagerbeskatning — most Danish and foreign funds are taxed annually on unrealised, mark-to-market gains, which usually stacks on top of PFIC exposure rather than replacing it.
- The aktiesparekonto — a Danish wrapper with no US recognition; the funds typically held inside it are PFICs regardless of the flat Danish rate.
- The researcher tax scheme — a flat 32.84% on gross salary for up to 7 years that can shift more of the overall tax burden onto the IRS by reducing the foreign tax credit.
- Boafgift — Danish inheritance tax at 15%, plus a 25% supplement for non-close relatives, with no comprehensive US–Denmark estate tax treaty to coordinate it against US estate tax.
Danish investment tax and PFICs
Lagerbeskatning, the aktiesparekonto, and why Danish funds are almost always PFICs.
- What is lagerbeskatning and how does it affect Americans in Denmark? — Lagerbeskatning is Denmark's mark-to-market tax principle: most investment funds and the Danish aktiesparekonto are taxed annually on the change in value over the year, whether or not anything was sold. For a US citizen this generally stacks on top of — rather than replaces — PFIC exposure on the same non-US fund, producing two separate layers of annual tax on unrealised gains.
- What is the aktiesparekonto and should Americans in Denmark use one? — The aktiesparekonto is a Danish account for listed shares and equity funds, taxed annually on a mark-to-market basis at a flat rate, with an annual deposit cap set each year. For most Americans it is not worth using: the holdings inside are generally PFICs for US purposes, the account gives no US tax shelter, and the Danish flat rate saving is often clawed back by the PFIC or foreign tax credit mechanics on the US side.
- Are Danish investment funds PFICs for US tax purposes? — Yes, in almost every case. A Danish investeringsforening, ETF or pooled fund is a foreign corporation earning passive income, which is the definition of a Passive Foreign Investment Company under US tax law. That means annual Form 8621 reporting per holding, and — without a timely election — a default tax regime that can tax gains and certain distributions more heavily than ordinary US capital gains rates.
Danish tax regimes and residence
The researcher tax scheme, double taxation, and when Danish residence starts.
- What is the Danish researcher tax scheme and can Americans use it? — Denmark's researcher tax scheme (forskerordningen, Kildeskatteloven §§48 E-F) lets qualifying researchers and highly paid key employees recruited from abroad pay a flat 32.84% on gross salary — 27% plus 8% labour market contribution — for up to 7 years, instead of ordinary progressive Danish income tax. Americans can use it if they meet the role, salary and recent-residence conditions, but a lower Danish tax bill can shift more of the tax burden to the IRS.
- Do I pay tax twice as an American living in Denmark? — Not usually on the same income taxed the same way, thanks to the US–Denmark tax treaty and the US foreign tax credit, but genuine double cost is common where the two countries tax different things at different times — lagerbeskatning on unrealised fund gains, PFIC rules, and the researcher scheme's reduced Danish rate are the usual sources.
- When do I become Danish tax resident as an American? — Danish full tax liability generally begins when you take up residence by acquiring a home available to you in Denmark and start actually staying there, or, failing that, once a continuous stay in Denmark exceeds a set period. It is a facts-and-circumstances test, not something your visa, employment contract or intention alone decides.
Retirement accounts and pensions
What happens to the 401(k), IRA and Roth, and how Danish pensions are treated.
- How is my 401(k) or IRA taxed if I live in Denmark? — A 401(k) or traditional IRA can generally stay invested while you are Danish tax resident, with Denmark typically taxing distributions as income when taken rather than taxing the account annually, provided the account is recognised as a qualifying pension arrangement. Roth IRA treatment is less settled, and the underlying investments inside a self-directed IRA brokerage account need checking for PFIC exposure just like any other holding.
- How does Denmark tax my Danish ratepension, livrente or company pension? — Danish workplace and private pensions — ratepension (fixed-term payout) and livrente (lifetime annuity) — generally receive favourable Danish tax treatment on contributions and growth, with tax due as payments are received. For a US citizen, the US–Denmark treaty generally supports similar deferral treatment for qualifying plans, but the position must be claimed, and underlying fund holdings inside the pension still need checking for PFIC exposure.
Property and what passes on
US property, ejendomsværdiskat, and Danish inheritance tax (boafgift).
- How is my US rental property or home taxed once I'm Danish resident? — Once you are Danish tax resident, Denmark generally taxes your worldwide income, which includes net rental income from a US property you kept, with a credit intended to prevent double taxation on the same income. A home purchased in Denmark separately enters the ejendomsskatteloven system, under which Danish homeowners pay an annual ejendomsværdiskat based on the property's assessed value.
- Do my heirs pay Danish inheritance tax (boafgift)? — Denmark charges boafgift at 15% on the value of an estate above an annually adjusted tax-free allowance, with spouses exempt entirely, and a supplementary 25% charge applying on top for beneficiaries outside the close family group. There is no comprehensive US–Denmark estate tax treaty, so Danish boafgift and US estate tax can both apply to the same assets with limited coordination.