Tax Tool

Tax and salary · 2026

Overtime tool for Norway

Enter your agreed hourly wage, the overtime hours, and the supplement in your contract or collective agreement. The result is the gross pay for those hours: the ordinary hourly wage plus the supplement.

Quick math0

Use this for quick arithmetic, percentages, or to check figures while filling in the main tool, without leaving the page.

Your figures

Estimate

3,920 NOK for these overtime hours

Overtime pay
3,920 NOK
Ordinary pay for the hours
2,800 NOK
Supplement
1,120 NOK

How this breaks down

hourly wage
280 NOK
Hours
10.0
Supplement
40%

The Working Environment Act sets a minimum supplement of 40%. Collective agreements often use 50% or 100%. This figure is before income tax.

How to use this tool

  1. Use Overtime Tool for the question described above, and check that the inputs match your records and time period.
  2. Enter hourly wage.
  3. Enter overtime hours.
  4. Enter supplement (40% is the statutory minimum. Many agreements pay 50% or 100%.).
  5. Change hourly wage, overtime hours, supplement to compare scenarios, then check the units in the result.

Worked example with the prefilled values

This example shows how Overtime Tool uses its starting values. Change the calculator inputs to estimate your own situation.

Hourly wage
280 NOK
Overtime hours
10
Supplement
40 %

3,920 NOK for these overtime hours

  • Overtime pay3,920 NOK
  • Ordinary pay for the hours2,800 NOK
  • Supplement1,120 NOK

The Working Environment Act sets a minimum supplement of 40%. Collective agreements often use 50% or 100%. This figure is before income tax.

Formula and calculation logic

Base overtime pay = hourly wage × overtime hours

Supplement = base overtime pay × supplement rate; total = base + supplement

Total pay equals hours times the hourly wage, plus the same amount times the supplement. A 40% supplement on 500 NOK an hour is 200 NOK extra per hour, so the hour pays 700 NOK before tax.

The Working Environment Act requires a supplement of at least 40% for overtime. Workplaces often agree 50% or 100% instead.

Ordinary full-time hours are often 37.5 a week even though the Act's overtime line is drawn at 40 hours or 9 hours in a day. Follow the limit in your agreement when you count the hours.

Assumptions

  • The hourly wage is the wage used for overtime in your contract, not a salary divided by a guessed number of hours, unless that is how your contract defines it.
  • The result is before tax. Overtime pay is normally taxable and is part of the holiday-pay basis.
  • Time off in lieu, if you agree to it, replaces the ordinary hourly pay but not the supplement. This page does not model time off.

Published sources

Further reading for checking current rules and information. These links are not live inputs to the tool.

Questions about this tool

What supplement should I use if I am unsure?

Use 40% only as the legal floor. Check the collective agreement or the employment contract before you rely on the number.

Does this include the ordinary hourly pay?

Yes. The total includes both the base pay for the hours and the supplement. The breakdown shows them apart.

Are overtime hours capped?

The Act limits how much overtime can be worked. This tool prices the hours you enter. It does not check those limits.