Electric car or plug-in hybrid in Belgium: how to choose in 2026

Last year, a colleague asked my advice about his company car. He was torn between a Kia Sportage PHEV and a Kia EV6. "The hybrid gives you the best of both worlds, doesn't it?" In practice, the answer has become far more nuanced — especially in Belgium, where the 2026 tax rules have completely reshuffled the deck.

Here's the comparison I wish I'd found before switching to electric myself.

What's the real difference between a BEV and a PHEV?

A fully electric vehicle (BEV) has a single electric motor and a 40 to 100 kWh battery. No exhaust, no oil changes, no fuel tank.

A plug-in hybrid (PHEV) combines a combustion engine with a small electric motor and an 8 to 20 kWh battery. It can drive 40 to 80 km on electric power, then the petrol engine takes over.

On paper, the PHEV sounds ideal. In practice, the data tells a different story.

What is the real-world fuel consumption of a PHEV in Belgium?

Manufacturers claim 1.2 to 2 L/100 km for PHEVs. The ICCT — the organisation that exposed the Dieselgate scandal — analysed nearly one million vehicles produced between 2021 and 2023. The verdict:

Why such a gap? Many PHEV drivers — especially on company leases — don't charge the battery. The vehicle then runs permanently in combustion mode, carrying the dead weight of its dual system (battery plus electric motor), which pushes consumption even higher. Transport & Environment confirms: PHEVs are not delivering on their decarbonisation promise under real-world conditions.

A BEV, by contrast, uses 15 to 22 kWh/100 km depending on the model and conditions. On the E411 in winter at 120 km/h, my Ioniq 5 reads 20 kWh/100 km. Around Brussels, closer to 14 kWh.

How do Belgium's 2026 tax rules settle the debate?

This is where Belgium stands out. Since 1 January 2026, the reform is binary for companies.

Deductibility for companies (SA, SRL, SC)

The maths is unforgiving. A company BEV at €45,000 generates roughly €860 in annual tax for the employee (50% bracket), versus €1,400 for a PHEV and €1,900 for a diesel. Over a 4-year contract, the BEV driver saves between €2,200 and €4,200 in personal tax compared to the PHEV.

The 100% deductibility also means the company recovers all costs (leasing, insurance, maintenance, electricity) against its taxable base. A PHEV ordered in 2026? Zero deduction.

In 2026, a company PHEV is no longer a compromise. It's a costly choice: 0% deductibility, higher ATN, doubled CO2 contribution.

What about self-employed individuals (natural persons)?

This is the only case where the PHEV retains a tax edge. A self-employed individual can still deduct a PHEV emitting under 50 g CO2/km, using the formula:

Deductibility = 120% – (0.5% × g CO2/km)

A PHEV at 30 g CO2 → 105% deductibility, capped at 100%. But beware: this only applies to the professional portion, and fuel costs (petrol) are only 50% deductible. The BEV offers 100% deductibility on all costs, including electricity.

For private buyers?

No direct deductibility, but concrete tax differences:

• Registration tax (TMC): minimal for BEVs (~€61.50 in Flanders, near zero in Wallonia/Brussels). PHEVs pay more depending on their fiscal horsepower.
• Annual road tax: ~€103/year for a BEV. PHEVs are taxed on their combustion power — often €300 to €600/year.

What's the real 5-year TCO in Belgium?

Let's compare two similar vehicles — a Kia EV6 (BEV) and a Kia Sportage PHEV — over 5 years and 20,000 km/year.

Difference over 5 years: ~€7,300 in the BEV's favour, before even factoring in professional deductibility. The purchase price gap (~€3,000) is erased by the third year.

In company leasing, the calculation is even more favourable for the BEV thanks to 100% deductibility.

When does a PHEV still make sense in 2026?

Let's be honest: there are still a few profiles where the PHEV can be justified.

A PHEV may suit you if:

• You're a self-employed individual driving under 12,000 km/year — the maintenance premium is limited and you still get partial deductibility
• You regularly drive over 500 km non-stop without reliable access to fast charging
• You have absolutely no way to charge (no home, no workplace, no nearby public charger)

A BEV makes more sense if:

• You drive a company car (SA, SRL, SC) — the 2026 tax rules leave no room for debate
• You have access to home or workplace charging — 80% of charges happen there
• You drive more than 15,000 km/year — the BEV's TCO advantage accelerates with mileage
• You want simpler maintenance: one motor, no oil changes, regenerative braking

What real-world range can you expect from a BEV vs a PHEV on Belgian roads?

On the E411 between Brussels and Arlon, typical Belgian winter conditions (2°C, rain, 120 km/h) reduce range by roughly 25% compared to WLTP.

In practice, a PHEV switches to petrol after 45 to 65 km. For a Brussels–Liège trip (97 km) or Brussels–Ghent (56 km), the PHEV invariably ends up on petrol. The BEV does the round trip without a thought.

What's the real environmental impact?

Official PHEV figures (20 to 40 g CO2/km WLTP) are misleading. In real conditions, Transport & Environment estimates PHEV emissions at 100 to 160 g CO2/km — barely better than a modern combustion car.

A BEV charged on the Belgian grid (2026 energy mix) emits roughly 20 to 40 g CO2/km in a well-to-wheel analysis. With solar panels: nearly zero.