Icelandic taxes are a withholding system first and a spring correction second. Get the personal tax credit right when work starts, then treat the annual assessment on skattur.is as a review, not a blank exam.
What do you do when work starts?
Your kennitala is the key Skatturinn uses for everything. Finish Get a kennitala and open local banking before payroll expects an Icelandic IBAN: Open a bank account. People with legal domicile who are 16 or older get a monthly personal tax credit that lowers the tax withdrawn from salary. Physical paper tax cards were abolished; employers pull credit and bracket data electronically. Log in at skattur.is with electronic ID or an RSK password (veflykill) to view “staðgreiðsla” statements and tell a second employer how to share unused credit.
Work in Iceland reminds newcomers that net pay also deducts mandatory union and pension contributions, not only income tax. Foreign experts may qualify for a separate tax discount track for a limited period; check Skatturinn and Work in Iceland before you budget on gross figures alone: How expensive is Iceland.
How do annual returns and short stays work?
The tax year is the calendar year. Residents file and review assessment digitally; final assessment typically lands toward the end of May the following year, with refunds or balances adjusted on the published Skatturinn rules. Keep domicile registration accurate so municipal tax and credit entitlement stay aligned: Register your address.
Individuals with limited tax liability who leave Iceland must usually file form RSK 1.13 with the local tax office at least one week before departure, including foreign TIN and a foreign address or Icelandic representative. If you miss that window, Skatturinn still expects filing as soon as possible and no later than March of the following year. Sequence this inside the wider paperwork stack so health and residence steps do not stall while payroll starts.
Common misconceptions
Assuming a kennitala alone sets the correct withholding fails. You still need domicile for full personal tax credit rights and a working login to check what employers reported.
Assuming you can ignore Skatturinn until April also fails for leavers. Limited-liability exits use RSK 1.13 on a departure clock, not the resident spring calendar alone.
Summary
Point your employer at Skatturinn withholding and personal tax credit, log in with rafræn skilríki, then review the annual assessment. If you leave on a limited-liability stay, file RSK 1.13 before you fly out.
Sources
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