Denmark car tax calculator (grøn ejerafgift)
Denmark's green ownership tax is based on fuel efficiency in km per litre — thirstier cars pay much more.
Worked example: with Brændstoføkonomi of 18, this model computes Årlig afgift of 800 DKK. See the full breakdown.
⚠ Illustrative rates Updated for 2026 · sources checked 2026-08-02
How grøn ejerafgift in Denmark is calculated
Denmark's recurring car tax (gron ejerafgift) rewards efficiency: it is based on how many kilometres the car does per litre, so an economical car pays little and a thirsty one pays a lot.
Diesels carry an equalisation surcharge, and cars registered from mid-2021 use a CO2-based scale. Illustrative rates. Estimate, not tax advice.
Worked example
| Brændstoføkonomi (km/l) | 18 |
|---|---|
| Årlig afgift ✓ | 800 |
Every row is computed by the engine from the inputs above. Rows marked ✓ are additionally pinned by a published self-test vector.
Frequently asked questions
How much for a car doing 18 km/l?
Around 800 DKK per half-year band in the illustrative table; a car doing 12 km/l pays roughly double.
Do diesels pay more?
Yes — a diesel equalisation surcharge is added.
Is it based on emissions?
On fuel efficiency for older cars, and a CO2 scale for cars registered from mid-2021.
Sources
- Motorstyrelsen · checked 2026-08-02
Estimate. Not tax advice. The rates in this calculator are illustrative: they reproduce the shape of the charge through 2 self-test cases, but they are not the official schedule, so the amount shown will not match your bill. Use the official source above for that.
Check the arithmetic yourself: how this calculator is verified — the formula behind every derived value, the 2 test cases the engine reproduces, and what the badge does and does not claim. Also available as machine-readable JSON.
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