Skatturinn, CFC Rules & Your US LLC — Iceland Tax Guide 2026

Disclaimer: this article is general information for Icelandic founders and does not constitute personal tax advice. Confirm your specific structure with a Skatturinn-registered adviser before filing.

Iceland taxes its residents on worldwide income, which means any distribution or profit attributable to your US LLC must be reflected on your annual Icelandic tax return. This guide explains the exact rules, how the IRS treats your entity (disregarded), how Skatturinn treats it (transparent), and what to actually enter on your skattframtal.

Step 1 — how the IRS treats your LLC

A single-member Wyoming LLC owned by an Icelandic tax resident with no US trade or business is a disregarded entity for US federal tax purposes. The LLC itself files no US income tax return. The only required filing is Form 5472 + pro-forma Form 1120 as an information return. Missing this triggers a USD 25,000 penalty — our FULL plan handles it automatically.

Because you are non-resident and (typically) not engaged in US trade or business (ETBUS), US federal income tax is zero. This is not a loophole — it is the deliberate design of Subchapter K for foreign owners.

Step 2 — how Skatturinn treats your LLC

Skatturinn generally looks through the US LLC as a transparent structure and taxes you personally on the underlying profit. There is no formal "check the box" mechanism, but the practical effect is similar: LLC profits accrue to you, and you declare them as foreign business income on your annual return.

The applicable Icelandic rate depends on how the income is characterized:

• Business/trade income — taxed at the ordinary personal rate (up to ~46% for high earners), less any foreign-tax credit (which is zero since the US charged nothing).
• Capital gains / dividends — 22% flat rate.

Most consultants, SaaS founders and freelancers fall into the business/trade income bucket. Speak to your adviser about whether structuring some receipts as dividends from the ehf. holding the LLC can lower the effective rate.

Step 3 — CFC rules (Controlled Foreign Company)

Iceland implemented ATAD-aligned CFC rules that can attribute passive income from a low-tax foreign entity to an Icelandic resident even before distribution. Key triggers:

• You control (directly or indirectly) more than 50% of the entity.
• The entity is resident in a jurisdiction with a corporate tax rate below two-thirds of Iceland's (i.e. below ~13.3%).
• More than one-third of the entity's income is passive (dividends, interest, royalties, capital gains).

A single-member Wyoming LLC with a non-resident owner is a disregarded entity — arguably it is not a "company" for CFC purposes at all, and the transparency treatment means all income already flows to you. In practice most Icelandic advisers do not apply CFC to single-member disregarded LLCs of active operators. It is safer, however, to disclose the structure clearly and let Skatturinn make the determination.

Step 4 — what to actually file

On your annual skattframtal (typically due 31 March):

• Report LLC profits as foreign business/trade income.
• Disclose ownership of the foreign entity (name, jurisdiction, ownership percentage).
• Report the Mercury/Relay bank account.
• If distributions were transferred to your Icelandic personal account, they will already be visible via bank reporting — reconcile them.

Step 5 — social security (tryggingagjald)

Active business income earned by an Icelandic resident is generally subject to tryggingagjald (social insurance contribution) at ~6.35%. Your adviser will handle whether the LLC income is treated as self-employment earnings or as a distribution from a foreign holding.

Interaction with your Icelandic ehf.

Some founders park the Wyoming LLC inside their Icelandic ehf. This creates a cleaner corporate structure but changes the CFC analysis and the reporting flow. Discuss with your adviser before choosing between:

• Direct personal ownership — simplest, transparent, taxed on your personal return.
• ehf. holds the LLC — corporate layer, 20% Icelandic corporate tax, then 22% dividend tax on distribution.

Common questions from Icelandic clients

Do I need to translate US documents into Icelandic?

Only if Skatturinn specifically requests them. In practice, English filings are accepted for verification purposes.

What if I move to another country?

Icelandic tax residency ends when you deregister with Þjóðskrá and establish tax residence elsewhere. The LLC continues to exist and simply becomes subject to your new country's rules.

Can I still use the ehf. for local invoices?

Yes. Most operators run both entities in parallel — see the setup patterns in our Iceland complete guide.

Does the LLC affect my kennitala or personal credit?

No. The LLC is a separate US legal entity and has no reporting link to your kennitala or Icelandic personal credit file.

Next steps

Read our Iceland banking guide to understand the Mercury flow, or start your LLC formation on the Iceland service page. We include the annual Form 5472 filing in our FULL package so US-side compliance is a solved problem.