My neighbour is an architect. Self-employed sole proprietor, two building sites a day between Ixelles and Wavre — 35,000 km a year. His accountant ran the numbers in January: €3,200 in non-deductible car expenses per year with his diesel. With an EV, that figure drops to zero. He's been driving a Model 3 since March.
A self-employed Belgian who orders an EV in 2026 deducts 100% of car expenses on the professional-use share. It's the last year at full rate — here's how to make the most of it.
How does a self-employed sole proprietor deduct an EV in Belgium in 2026?
The mechanics differ from companies. As a self-employed sole proprietor (personne physique), you declare actual professional expenses on your personal income tax (IPP). Car expenses form a separate category, with a deductibility rate that depends on the vehicle type.
For an EV in 2026: 100% deductibility, applied to your professional-use percentage. If you drive 75% for work, you deduct 75% of all costs (leasing, insurance, energy, maintenance, repairs, parking) at the 100% rate.
For a diesel: deductibility depends on CO2 emissions and rarely exceeds 75% of the amount — on the same professional share. Over 4 years, the gap is substantial.
| Order year | EV deductibility (IPP) | Diesel (120 g CO2) |
|---|---|---|
| 2026 | 100% | ~75% |
| 2027 | 95% | ~75% |
| 2028 | 90% | ~75% |
| 2029 | 82.5% | ~75% |
Source: SPF Finances, CIR 1992 — art. 66. Diesel rate depends on individual CO2 formula.
Last year at full rate — SPF Finances
Common threshold accepted by Belgian tax authority with logbook
Self-employed consultant, 25,000 km/year, EV vs diesel
What percentage of professional use can you declare?
The Belgian tax authority doesn't set a universal percentage — it evaluates case by case. In practice, three thresholds come up in audits:
50%: defensible minimum if you have a fixed office and a few client visits per week. This is the usual floor.
75%: standard for professions with frequent travel — architects, consultants, sales reps, home nurses. Most accountants recommend this threshold.
90%+: reserved for itinerant professions with very little private use. Requires a detailed year-round logbook.
A logbook is your best ally. Apps like Driwe or TripLog record every trip automatically by GPS. One month of data per quarter is enough to establish a credible pattern if audited.
Lease or buy: which option for a self-employed professional?
| Criterion | Outright purchase | Financial leasing | Renting (operational leasing) |
|---|---|---|---|
| Capital tied up | Yes (full price) | No | No |
| VAT recoverable | Yes (pro share) | Yes (pro share) | Yes (pro share) |
| Depreciation | 4–5 years on balance sheet | On balance sheet | Off balance sheet |
| EV deductibility | Depreciation at 100% | Payments + interest at 100% | Payments at 100% |
| Services included | No | No | Maintenance, tyres, assistance |
In practice, renting is the option I recommend to most self-employed professionals. A fixed monthly payment, all-inclusive, deductible as an expense — no accounting surprises. Expect €450–650/month for a Skoda Enyaq or Tesla Model 3 on a 48-month/80,000 km contract in Belgium.
Buying outright only makes sense if you have the cash flow and plan to keep the vehicle beyond 5 years. EV residual values hold better than three years ago: according to Autovista, the Tesla Model 3 retains 58% of its value after 4 years in Belgium.
Does home charging count as a professional expense?
Yes, on one condition: proof. Electricity consumed for charging is 100% deductible on the professional-use share. The wallbox installation can be depreciated as a professional investment over 3–5 years.
The tax authority may ask how you separate car consumption from the rest of the household. Two practical solutions:
- Smart charger (Easee, Wallbox Pulsar, Smappee): logs every session in kWh. Monthly CSV export for your bookkeeping.
- Separate meter: a more radical solution, but bulletproof.
At €0.30/kWh (average Belgian residential rate 2026, CREG data), charging an EV that consumes 17 kWh/100 km over 25,000 km costs about €1,275/year — of which €956 is deductible at 75% professional use. Versus €3,125 in diesel at the same mileage, where only €1,758 would be deductible.
Which EV model for which self-employed profile?
The choice depends on two variables: annual mileage and your city-to-motorway ratio.
| Profile | Key need | Suitable models | Renting budget/month |
|---|---|---|---|
| Consultant / sales rep | Motorway range | Tesla Model 3, Hyundai Ioniq 6 | €550–650 |
| Architect / tradesperson | Boot space + versatility | Skoda Enyaq, VW ID.4 | €500–600 |
| Liberal profession | Image + comfort | BMW iX1, Audi Q4 e-tron | €600–750 |
| Tight budget | Entry price | BYD Dolphin, Peugeot e-208 | €350–450 |
Estimates for 48-month renting, 20,000 km/year, insurance included — indicative Belgian market rates, May 2026.
| Modèle | Prix | Autonomie réelle | Batterie | Recharge DC |
|---|---|---|---|---|
| Tesla Model 3Recommandé | 42 990 € | 380 km | 60 kWh | 170 kW |
| Škoda Enyaq iV 80 | 43 990 € | 410 km | 82 kWh | 135 kW |
| Hyundai IONIQ 5 | 41 990 € | 390 km | 77.4 kWh | 233 kW |
| BYD Dolphin | 29 990 € | 328 km | 60.4 kWh | 88 kW |
How much does a self-employed person save by going electric? 4-year calculation
Concrete case: self-employed consultant (sole proprietor) in Brussels, 25,000 km/year, 75% professional use.
| Item | EV (Tesla Model 3) | Diesel (VW Passat 130 g) |
|---|---|---|
| Monthly renting (48 months) | €590 → €28,320 | €520 → €24,960 |
| Energy (25,000 km/year, 4 years) | €5,100 | €12,500 |
| Maintenance (4 years) | €1,200 | €3,600 |
| Gross total (4 years) | €34,620 | €41,060 |
| Tax deduction (75% pro × 100% EV vs ~75% diesel, 50% bracket) | −€12,982 | −€7,649 |
| Registration + road tax (Brussels, 4 years) | €412 | €3,200 |
| Net cost after tax | €22,050 | €36,611 |
Net savings over 4 years: €14,561 in favour of the EV. Renting costs €70 more per month, but 100% deductibility, energy costs divided by three and near-zero maintenance flip the equation.
A self-employed calculation isn't a company calculation. No benefit-in-kind, no CO2 contribution — but 100% deductibility on the 50% marginal tax bracket turns every euro of EV expense into 50 cents less tax. Over 4 years, that pays for half the car.
Le verdict de Christophe F.
For a self-employed sole proprietor in Belgium, ordering an EV in 2026 represents a closing fiscal window. Full deductibility on personal income tax, combined with energy and maintenance costs divided by three, creates a net advantage of €12,000–15,000 over 4 years compared to an equivalent diesel. Renting simplifies bookkeeping, a smart home charger closes the case on the proof front. Christophe's advice: sign the contract before 31 December 2026. Not for the planet — for your cash flow.