Three separate charges, and none of them behave like a bracket
Norwegian income tax is assembled from three parts rather than one table. Base tax at 22% applies to alminnelig inntekt — your income after the standard minstefradrag deduction and a personal allowance. Trinnskatt — the bracket tax — is layered on top at rates from 1.7% up to 17.8%. And trygdeavgift, national insurance, takes 7.6%. On a salary of NOK 600,000 the three together leave NOK 455,817. You can see the split in the salary calculator.
Because the three parts start at different income levels and one of them phases in, the marginal burden does not rise smoothly. It rises, falls, and then rises again.
The 25% band that most Norwegians pass through without noticing
Trygdeavgift is not simply 7.6% of everything. It is charged as the lower of 7.6% of your income or 25% of the amount above NOK 99,650. Below that threshold you pay nothing. Just above it, the 25% calculation is the smaller of the two — so for a stretch of income, the marginal national insurance rate is 25%, not 7.6%. The two formulas cross at about NOK 143,000, and from there the flat 7.6% takes over.
| Gross salary | Total marginal burden | Of which trygdeavgift |
|---|---|---|
| NOK 90,000 | 0.00% | 0.0% |
| NOK 110,000 | 25.00% | 25.0% |
| NOK 140,000 | 25.00% | 25.0% |
| NOK 150,000 | 7.60% | 7.6% |
| NOK 250,000 | 31.30% | 7.6% |
| NOK 400,000 | 33.60% | 7.6% |
| NOK 1,000,000 | 46.40% | 7.6% |
Read the middle of that table again. Someone earning NOK 130,000 keeps 75 øre of their next krone. Someone earning NOK 150,000 keeps 92 øre. The lower earner faces more than three times the marginal rate — and it happens precisely in the income range occupied by part-time work, students and people returning to employment. Above NOK 150,000 the burden climbs again as base tax and then trinnskatt engage, reaching 46.40% at a million.
The practical consequence: taking on extra hours that lift you from NOK 100,000 to NOK 140,000 is taxed unusually hard, while the step from NOK 145,000 to NOK 185,000 is unusually light. Neither is obvious from any published rate table.
Why base tax starts so late
Two deductions push the start of base tax well up the income scale. The minstefradrag is 46% of your salary, capped — so at lower incomes nearly half your income is deducted automatically. On top of that comes a personal allowance. The result is that alminnelig inntekt only becomes positive some way into a normal salary, which is why the 22% base rate contributes nothing at all at NOK 150,000 and why Norway's effective rates at low income are far below its headline rates.
What the calculator covers — and what it doesn't
- Standard deductions only — the minstefradrag and personal allowance. Actual expenses, if higher, can be claimed instead.
- Class 1 (single). Norway abolished the old class 2 for couples, but children and single-parent status still affect other benefits.
- No mortgage interest deduction, which is unusually valuable in Norway and reduces alminnelig inntekt directly.
- No wealth tax (formuesskatt), which Norway levies on net assets above a threshold — a real cost for asset-holders that salary calculators never show.
- The Finnmark and Nord-Troms special rate is not applied; residents there pay a reduced base rate.
- Pension contributions to occupational schemes are not deducted.
Rates come from Skatteetaten for 2026. If a figure looks wrong, please tell us — our methodology explains how each calculator is checked before publication.