Car insurance premium increase in Belgium: every cause, in euros

Your premium went up and your insurer blames inflation. On a 620 € annual premium, the tax rise of 1 July 2026 weighs 1.99 €, the annual repricing 25 to 37 €, one at-fault claim 179 € in year one, and simply never having compared in five years up to 959 €. Here is the ranking, line by line.

The causes ranked, most expensive first

The table below prices every cause of increase on one single contract: this site's reference profile, a 35-year-old driver, VW Golf 1.5 TSI, living in Flemish Brabant, no claims for five years, around 15,000 km a year, third-party liability plus mini-omnium at 620 € a year. Sources and caveats for each line come further down.

Two lines out of six depend on the market. The other four depend on your file or on your inertia, and those are precisely the heavy ones. The ratio between the first line and the last is 1 to 482.

One at-fault claim costs 265 times the tax rise everybody is talking about.

Why does my premium rise with no accident and no change?

Three mechanisms reach you without your file having moved, and they stack.

The first is your insurer's annual repricing. It tracks claims costs rather than the consumer price index, and that distinction explains most of the rise since 2023: between 2018 and 2023 the average cost of a Belgian third-party motor claim grew by 17.3 %, including 21.3 % for garage labour rates alone, 15.6 % for spare parts and 16.2 % for new vehicle prices, while the health cost of road accidents rose only 3.5 %. The average motor premium followed, from 454 € in 2019 to 507 € in 2024, up 11.7 % in five years according to Assuralia figures compiled in the HelloSafe barometer.

The second is fiscal. The Belgian tax on non-life insurance premiums moved from 9.25 % to 9.6 % on 1 July 2026.

The third is regulatory: the revised European directive 2021/2118 raises the minimum compulsory third-party motor cover, and the Belgian sector puts its effect at 2 to 5 % on the liability portion of the premium alone.

The 9.6 % tax rate is worth 1.99 € a year

The tax applies to the net premium, not to the amount you pay. On a contract billed at 620 €, the net premium is therefore 567.51 € and the tax 52.49 €.

The whole difference fits on a two-euro coin. If your bill gained 40 € or 60 €, the tax explains less than 5 % of it, and the rest comes from your insurer or from your file. The full breakdown, including policy fees and the cost of paying monthly, is in our article on the Belgian insurance premium tax.

One at-fault claim: 179 € in year one, 528 € over five

The reference profile has five claim-free years behind it, which places it at degree 6 on the Belgian 23-degree bonus-malus scale, at 66 % of the base premium. An at-fault accident adds five degrees at once and moves it to degree 11, at 85 %.

The calculation runs like this. With a net premium of 567.51 € corresponding to 66 %, the base premium at 100 % is 859.86 €. At degree 11 the net premium climbs to 730.88 €, which is 163.37 € more, or 179 € once the 9.6 % tax is applied. One degree then comes back per claim-free year, so the surcharge burns out over five financial years: 179 €, then 141 €, then 104 €, then 66 €, then 38 €. Total 528 €.

Set that against the 1.99 € of the tax rise and you get the 1-to-265 ratio. The practical conclusion lies in the break-even point: below a certain repair bill, paying the garage yourself costs less than claiming. We priced that threshold degree by degree in report a claim or pay out of pocket, and the full mechanics of the 0-to-22 scale are set out in our bonus-malus guide.

Moving from Leuven to Brussels costs 357 € a year

Belgian insurers price the postcode using local accident, theft and vandalism statistics. The size of the gap, though, is rarely put in figures.

The most complete survey remains the CallMePower one published on 5 April 2023 and reported by Business AM: a comprehensive policy on a Citroën C3, quoted at six insurers, in every provincial capital and in Brussels.

A driver from Flemish Brabant moving to Brussels therefore sees the premium go from 963.96 € to 1,320.96 €, which is 357 € more a year and a 37 % rise, with vehicle, age and claims record rigorously unchanged. No market repricing comes anywhere near that.

The same survey gives a second, still more useful figure: between the dearest and the cheapest contract in the panel, the gap reaches 958.92 € a year. In Brussels alone it climbs to 545.40 €. Staying with the same insurer out of habit therefore costs structurally more than every market increase combined, and it is the one line in the ranking you can settle in an afternoon. Our ranking of the best car insurers and the comparison tool exist for that.

Which changes move the premium, and which leave it alone?

Belgian insurers recalculate the premium on a limited set of parameters. Here are the levers that matter, and those whose effect is overestimated.

• The postcode. The heaviest non-behavioural factor, up to 37 % between Flemish Brabant and Brussels. It updates as soon as you report the move, which you are contractually obliged to do.
• The bonus-malus degree. Five degrees per at-fault claim, one degree back per clean year. Shared liability on an accident statement usually counts as an at-fault claim.
• The vehicle. Power in kW, list value and repair cost. Changing car replays the whole tariff, which explains premium jumps that feel unexplained after a purchase.
• The declared main driver. Adding a young driver to the policy changes the risk being priced. Leaving one off exposes you to proportional reduction of the payout after a claim.
• The declared annual mileage. Decisive with pay-per-kilometre insurers, secondary elsewhere. Our article on pay-per-kilometre cover prices the switching point.
• The optional cover taken. Roadside assistance, legal expenses, driver protection and a replacement vehicle sit on top of the base rate and can be renegotiated separately.

Two beliefs hold up less well. Vehicle colour appears in no Belgian tariff. And a non-fault claim, with an identified party at fault, leaves your bonus-malus degree untouched, even though some insurers run a separate scale for the material damage cover of a full comprehensive policy.

Is the increase legal, and can it be refused?

It is legal, and no, it cannot be refused. It can be left behind.

Your insurer may adjust its rate at the annual renewal date provided it informs you beforehand. The counterpart has been strengthened in Belgium: since 1 October 2024, an amendment to the Insurance Act of 4 April 2014 allows a car policy to be cancelled at any time from the second year onwards, with notice cut from three months to two. A registered letter is no longer compulsory, an electronic signature or an online form will do, and the renewal notice must now remind you of the right.

Timing matters. Two months' notice means the decision gets made while reading the renewal notice, not while discovering the direct debit. Our guide on switching car insurer covers the procedure and the traps of the overlap period.

If the disagreement is about something other than price, the Insurance Ombudsman handles disputes between Belgian policyholders and companies free of charge, and the FSMA supervises intermediaries. A driver who can no longer find any third-party cover at all may apply to the Tariff Bureau, a last-resort mechanism provided for by law.

Method, reference profile and sources

Every figure in this article applies to this site's reference profile: a 35-year-old driver, VW Golf 1.5 TSI, living in Flemish Brabant, no claims for five years, around 15,000 km a year, third-party liability plus mini-omnium.

The 620 € starting premium is the midpoint of the Belgian market range for a mini-omnium recorded in 2026, namely 410 to 950 € a year. That range is attributed to no particular insurer and is not a personal quote: it serves as a scale to make the gaps legible. The ratios between the lines of the ranking do transfer to any premium, since bonus-malus, repricing and tax are all proportional.

Regional premiums come from the CallMePower survey of 5 April 2023, reported by Business AM and consulted on 30/08/2026: comprehensive cover on a Citroën C3, six insurers, provincial capitals and Brussels. That survey's profile differs from ours in vehicle and formula, so only the gaps and ratios between cities are reused here, never the absolute amounts.

The average premium trend (454 € in 2019, 507 € in 2024) and the breakdown of claims costs come from Assuralia, the FPS Economy and the FPS Employment, compiled in the HelloSafe motor barometer, consulted on 30/08/2026. Rates for the tax on non-life insurance premiums fall under the FPS Finance; the move from 9.25 % to 9.6 % on 1 July 2026 was confirmed by several Belgian market participants, and the breakdown in euros is an in-house calculation. The 23-degree scale and the five-year surcharge calculation are also in-house, detailed in the linked articles. The cancellation rules rest on the amendment to the Act of 4 April 2014 that took effect on 1 October 2024.

This site compares and calculates. It does not sell insurance, is not an intermediary within the meaning of Belgian law and issues no individual recommendation: for a contract, go to the insurer or to a broker registered with the FSMA. Ethias, for instance, publishes its own note on premium variation. No insurer pays for its presence in this article, and no link on this page is affiliated.

In short

A rising premium rarely has a single cause, and almost never the one people assume. The tax weighs 1.99 € a year on a 620 € contract, the repricing 25 to 37 €, the higher liability minimums 6 to 16 €. One at-fault claim weighs 179 € in year one and 528 € over five. A move to Brussels weighs 357 € a year. And never having compared weighs up to 959 €, every year, silently. Price your actual situation with the simulator, put the offers side by side in the comparison tool, and the ranking of the best car insurers will give you the detail company by company. You have two months' notice: the window opens the day the renewal notice lands.