Are Danish investment funds PFICs for US tax purposes?
Short answer: 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.
Written and reviewed by Anthony Walsh, Selanis. Last reviewed 2026-10-09.
Why it works this way
US tax law classifies a foreign entity as a PFIC if most of its income is passive (interest, dividends, capital gains) or most of its assets produce passive income. Pooled investment funds are built almost entirely out of passive income, so Danish funds, UCITS funds sold across the EU, and most pension-adjacent fund wrappers all qualify.
The default PFIC regime, absent an election, taxes 'excess distributions' and gains on sale by spreading them over the holding period and applying the highest marginal rates to amounts allocated to earlier years, plus an interest charge for the deemed deferral. This routinely produces a far worse result than ordinary long-term capital gains treatment.
A qualified electing fund (QEF) election or a mark-to-market election can convert this into a more ordinary-feeling tax result, but both require timely, specific paperwork — a QEF election needs annual compliance information from the fund that most Danish fund managers do not provide, which often leaves the mark-to-market election as the only practical route.
This is why Danish lagerbeskatning and US PFIC rules can stack: Denmark taxing the fund on unrealised gains does not exempt it from a separate US PFIC computation on the same holding.
The expensive mistake: Not realising a 'low-cost index fund' from a Danish bank is a PFIC
Danish banks default clients into Danish or Luxembourg-domiciled index trackers that look identical to a US S&P 500 fund. For a US citizen they are not equivalent — the US-domiciled version has none of this exposure, while the Danish or Luxembourg version does.
What to do
- Audit every fund-type holding opened since arriving in Denmark — Bank-recommended funds, pension-linked funds and the aktiesparekonto contents are the common offenders.
- File Form 8621 for any PFIC already held — The form is required annually per fund once reporting thresholds are met, independent of whether tax is owed.
- Replace with US-domiciled funds at a custodian that accepts a Danish address — This removes the PFIC question for new investment going forward.