Model for calculating the taxable value of residential property
The Norwegian Parliament, Stortinget, has adopted an updated model for calculating the taxable value of residential property. The model uses information about sold properties from smaller geographic areas instead of entire municipalities, and will apply from the 2026 income year.
The purpose of this change is to calculate a more accurate market value for residential property.
The Tax Administration calculates a market value for your property based on data from Statistics Norway (SSB) about sold properties. The calculation takes into account the property’s location, size, year of construction, and type of property.
The tax deduction card for 2026
In your 2026 tax deduction card, the market value of your property is calculated using the updated model.
We start with information about your property from your 2024 tax assessment. For the 2026 income year, we’ll use the updated model for calculating taxable value. This updated model uses information about sold properties from smaller geographic areas instead of entire municipalities. The taxable value your property would have had under the updated model for 2024 is the basis for your 2026 tax deduction card.
We also take expected price growth into account. We estimate that property prices will increase by an average of 9.8 percent from the end of 2024 to the end of 2026.
If you believe the calculated market value and taxable value are wrong, you can change and order a new tax deduction card.
You must enter the market value you believe is correct. The taxable value is calculated automatically. Read more about the taxable value of residential property.
The tax return for 2025
The calculated market value at the end of 2025 will be used in your tax return. The updated model will not be used in the 2025 tax return.
If the calculated market value and taxable value are too high, you can request that your property be valued based on proven market value.
Specific information if you
To address cases where the taxable value of residential property was too high due to municipal mergers, a transitional rule was introduced from the 2020 income year.
This transitional rule will be discontinued from the 2026 income year.
In the 2026 tax deduction card, properties are valued using the updated model.
You can read more about the updated model on Statistics Norway’s (SSB) website.