📄 Contractor Tax Return in Iceland (2026)
Annual tax return is mandatory for all contractors. It consists of two parts: the personal return (RSK 3.01) and the business report (RSK 4.11). This guide explains what is needed, when, and how.
📅 Best time to read this:
January–March (tax return season) 🎯
TL;DR
Contractors must file RSK 3.01 (personal) and RSK 4.11 (business) in March each year. FreelancePay provides a year-end summary ready to fill into RSK 4.11.
1) What is Skattframtal?
Skattframtal is the annual reconciliation where you declare all income and deductions. It adjusts your monthly withholding payments and determines whether you receive a refund or owe additional tax.
2) Key Deadlines
January
Return opens at skatturinn.is
January–February
Skatturinn sends partial return with known information
Around mid-March
Deadline to file tax return
June
Skatturinn issues final assessment and refund (if applicable)
3) RSK 4.11 — Step by Step
| Field | What to enter | FreelancePay |
|---|---|---|
| 1017–1060 | Total business revenue | ✅ In year-end summary |
| 3080 | Calculated remuneration | ✅ Calculated automatically |
| 3170 | Pension contribution (employer) | ✅ In year-end summary |
| 3160 | Social security (tryggingagjald) | ✅ In year-end summary |
| 4010–4099 | Business expenses | ✅ Need to add manually |
| RSK 4.03 | Vehicle expenses (separate form) | ⚠️ Fill out yourself |
| Result | Revenue − Expenses = Profit or loss | ✅ Calculated in summary |
4) What Can You Deduct?
- All direct business expenses — software, equipment, travel, phone/internet
- Pension contributions (both employer and employee portions)
- Social security (tryggingagjald)
- FreelancePay service fee
- Vehicle expenses (percentage of business use) — RSK 4.03
- Office or coworking space rent
- Courses and professional development
- Optional extra pension savings (up to 500,000 ISK/year)
5) Common Mistakes
Forgetting to report all income
All payments from clients are reported to Skatturinn — you cannot hide them.
Wrong job category for calculated remuneration
Skatturinn can reassess and charge back taxes with interest.
Missing deductible expenses
You pay tax on a higher amount than necessary. Expense deductions can save tens of thousands.
Filing late
Late fee and potential additional penalties.
Forgetting vehicle expense documents (RSK 4.03)
You could miss a significant deduction.
6) FreelancePay — Year-End Summary Ready to Use
FreelancePay gives you a summary of all revenue, calculated remuneration, tax payments, and pension payments each year — all ready to use in RSK 4.11. You just need to add your business expenses.
Revenue summary
Tax payments
Pension payments
Calculated remuneration