City car 1.0 (999 cm³)
Fiscal horsepower
6 fiscal hp
- Annual road tax (Brussels / Wallonia, combustion)
- €193.91
Free calculator · Regional taxes · 2026
Fiscal horsepower (CV fiscaux) calculator
Fiscal horsepower is not DIN horsepower: it depends on displacement and sets the road tax and part of the registration tax. Enter the displacement, the result is immediate.
Your parameters
Examples:
cm³
Box P.1 of the registration certificate. An electric car has no displacement: its fiscal horsepower follows the kW.
Result
Fiscal horsepower
8 fiscal hp
- Annual road tax (Brussels / Wallonia, combustion)2026-2027 rates, surcharges included.
- €313.24
Displacement → fiscal horsepower conversion table
| Fiscal hp | Displacement |
|---|---|
| 4 fiscal hp | up to 750 cm³ |
| 5 fiscal hp | up to 950 cm³ |
| 6 fiscal hp | up to 1150 cm³ |
| 7 fiscal hp | up to 1350 cm³ |
| 8 fiscal hp | up to 1550 cm³ |
| 9 fiscal hp | up to 1750 cm³ |
| 10 fiscal hp | up to 1950 cm³ |
| 11 fiscal hp | up to 2150 cm³ |
| 12 fiscal hp | up to 2350 cm³ |
| 13 fiscal hp | up to 2550 cm³ |
| 14 fiscal hp | up to 2750 cm³ |
| 15 fiscal hp | up to 3050 cm³ |
| 16 fiscal hp | up to 3250 cm³ |
| 17 fiscal hp | up to 3450 cm³ |
| 18 fiscal hp | up to 3650 cm³ |
| 19 fiscal hp | up to 3950 cm³ |
| 20 fiscal hp | up to 4150 cm³ |
| 21 fiscal hp | above 4150 cm³ (+1 hp per 400 cm³) |
Calculate the full true cost
Registration tax, road tax, energy, depreciation, taxation: the true monthly cost calculated under the 2026 Belgian rules, free, no account needed.
Worked examples 2026
Calculated by the same engine as the full true cost calculation, never estimated by an AI.
Compact 1.5 TSI (1,498 cm³)
Fiscal horsepower
8 fiscal hp
- Annual road tax (Brussels / Wallonia, combustion)
- €313.24
Saloon 2.0 diesel (1,995 cm³)
Fiscal horsepower
11 fiscal hp
- Annual road tax (Brussels / Wallonia, combustion)
- €561.00
How it is calculated
Fiscal hp = displacement bracket (art. 23 of the Code of taxes assimilated to income taxes) ≤ 750 cm³ → 4 hp; ≤ 950 → 5; ≤ 1,150 → 6; ≤ 1,350 → 7; ≤ 1,550 → 8; … > 4,150 cm³ → 20 hp + 1 hp per 400 cm³ bracket started
Belgian fiscal horsepower is defined by article 23 of the Code of taxes assimilated to income taxes: each displacement bracket corresponds to a number of fiscal horsepower. It has nothing to do with actual power (kW or DIN horsepower).
This figure appears on the registration certificate and serves as the base for the annual road tax (Brussels and Wallonia) and for the registration tax at the federal rate. For an electric vehicle, fiscal horsepower is derived from the power in kW.
The calculator applies exactly the same table as AutoCalcul’s TCO engine: when a vehicle’s data sheet does not state its fiscal horsepower, this function estimates it.
Frequently asked questions
What is the difference between fiscal horsepower and DIN horsepower?
DIN horsepower measures the engine’s actual power (1 kW = 1.36 DIN hp). Fiscal horsepower is an administrative unit calculated from displacement: a 150 DIN hp Golf 1.5 TSI has 8 fiscal hp.
Where can I find my car’s fiscal horsepower?
On the registration certificate (box P.1 for displacement). Fiscal horsepower is also shown on the road tax assessment notice.
How many fiscal horsepower does an electric car have?
An electric car has no displacement: its fiscal horsepower is determined from the power in kW. In practice, the road tax of an electric car is the minimum rate in Brussels and Wallonia, and a reduced flat rate in Flanders for registrations since 2026.
Does fiscal horsepower change the registration tax?
Yes for the federal rate (Brussels and vehicles on renting): the registration tax is set there by bracket of fiscal hp or kW, whichever is higher. In Wallonia, the base amount also depends on this bracket before the CO2 and mass correction; in Flanders, the BIV no longer depends on fiscal hp.