Reduced VAT 20262026

6% VAT on your windows in 2026 — conditions and real savings

In Belgium, replacing windows and exterior doors in a home over 10 years old qualifies for the reduced VAT rate of 6% instead of 21%. On a 6-window project, that means between €400 and €900 in savings — combinable with regional grants. This page details the conditions, the savings and the procedure.

Calculate my VAT savings → See the conditions

6% instead of 21% VAT on supply and installation

15 VAT points saved on every euro of work

combinable with Wallonia / Brussels regional grants

Benchmarks 2026 · indicative savings

6 windows (typical project)3-façade house · PVC or aluminium ≈ 400– 600 €par châssis 10 windows (mid-size project)complete 4-façade house ≈ 650– 1 000 €par châssis 15 windows (large project)high-end house or apartment building ≈ 1 000– 1 500 €par châssis

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Indicative savings on VAT alone, for a home over 10 years old. Combinable with the regional grant.

VAT savings 2026

6% VAT savings by project size

The gap between 21% VAT and 6% VAT represents 15% of the pre-VAT amount of the work. The table below illustrates the real savings for three common project sizes, by material.

Prices verified in January 2026 · VAT calculated on supply and installation

Project size	PVC windows standard material	Aluminium windows mid-range	Wood-aluminium windows premium
6 windowstypical project	≈ 400– 500 € saved	≈ 480– 600 € saved	≈ 560– 700 € saved
10 windowsmid-size project	≈ 650– 800 € saved	≈ 800– 1 000 € saved	≈ 950– 1 200 € saved
15 windowslarge project	≈ 1 000– 1 200 € saved	≈ 1 200– 1 500 € saved	≈ 1 400– 1 800 € saved

Indicative savings based on 2026 price ranges. The actual saving depends on the pre-VAT quote. Check our price ranges to estimate with your own project.

Application conditions

Three conditions to qualify for 6% VAT

The reduced 6% rate is governed by Belgian law. It applies automatically as soon as three conditions are met. wendows checks them systematically before every quote.

Home over 10 years old
The building must have been delivered (first occupancy) at least ten years ago. This is the main condition. A new build, or a heavy renovation treated as a new build, remains subject to 21%.
Private dwelling — residential use
The work must concern a private dwelling used mainly for residential purposes. Commercial premises, offices and mixed-use spaces with a dominant professional use remain at 21%.
VAT-registered contractor
The invoice must be issued by a contractor registered for VAT in Belgium. A certificate from the client declaring the age of the home and its use is given to the installer and kept with the invoice.
Check my home’s eligibility →
Client certificate
The client must give the installer a certificate confirming that the home is over 10 years old and is used mainly as a private dwelling. wendows provides this certificate and has it signed when the order is placed.
Supply and installation included
The 6% VAT rate applies to the whole invoice: supply of the windows, glazing, hardware and installation. Finishing work (plastering, painting, patching) carried out at the same time also benefits from the reduced rate.
6% VAT + regional grant combined
The 6% VAT rate is fully combinable with regional grants (Wallonia, Brussels, Flanders). Together, the two advantages can cover 25 to 35% of the pre-VAT amount of the work.
See the regional grants →

VAT + regional grants

Combining 6% VAT and a regional grant

The reduced VAT rate applies regardless of region. It combines with the Wallonia Prime Habitation, the Brussels Renolution grant or the Flemish Mijn VerbouwPremie to maximise your savings.

Wallonia

6% VAT + Prime Habitation

25– 35 % of the pre-VAT amount covered between VAT and grant

In Wallonia, the Prime Habitation and the 6% VAT rate can be combined. For a low-income household, the grant alone can reach €240/m²; added to the VAT saving, the remaining out-of-pocket cost can fall below 65% of the gross amount.

VAT saving: 15% of the pre-VAT amount (automatic, home over 10 years old)
Prime Habitation: €40 to €240/m² depending on income
Prior home audit for the higher rates
Glazing Ug ≤ 1.1 W/m²K required for the grant

Wallonia grants detail →

Brussels-Capital

6% VAT + Renolution grants

25– 40 % of the pre-VAT amount covered depending on income category

The Brussels Region’s Renolution grants combine fully with the 6% VAT rate. A low-income household can recover up to 40% of the overall cost of its window replacement project.

VAT saving: 15% of the pre-VAT amount (automatic)
Renolution grant: up to €3 000 depending on income category
Home over 10 years old in the Brussels Region
Application submitted within 12 months of the final invoice

Brussels grants detail →

VAT calculated automatically

Your quote shows the 6% VAT rate directly

wendows is a VAT-registered contractor. Every quote shows the applicable rate (6% or 21%) and the saving achieved, with no steps required on your side.

Demander mon devis → 0800 00 000

How 6% VAT works in practice

We check eligibility
Age of the building, residential use, address: every parameter is checked during the technical visit or based on the building permit.
We prepare the certificate
A standard document is prepared and signed with you when the order is placed. It states the year of construction and the residential use of the building.
The quote shows 6% straight away
As soon as eligibility is confirmed, the quote drawn up by wendows automatically applies the reduced 6% rate. No later claim, no refund to wait for.
The invoice is compliant
The final invoice states the VAT rate applied, the reference to the certificate and the pre-VAT/VAT-inclusive amount. It serves as your supporting document in the event of an audit.

6% VAT applied directly on the invoice Combinable with the 2026 regional grants Certificate prepared and kept by wendows

Are you in Flanders? The 6% VAT rate applies in the same way for any home over 10 years old. It combines with the Mijn VerbouwPremie. Contact us to check your home’s eligibility.

VAT simulator

Calculate your VAT savings in 10 seconds

Select the material and the number of windows to get an indicative VAT savings range. The free quote remains the only precise estimate.

1 Project size

2 Number of windows (standard window)

Estimated VAT saving · range

2 400 – 3 600 €

home over 10 years old, residential use, 6 reference windows

Indicative VAT saving: −540 € depending on material and exact dimensions

Affiner avec un conseiller →

Indicative 2026 estimate based on a standard window. The actual saving depends on the pre-VAT amount of the quote.

Worked example

What 6% VAT changes on a real project

A concrete case to show the direct impact of the reduced VAT rate and its combination with the regional grant on a typical project in Wallonia.

4-façade house in Namur (Wallonia)10 openings · PVC windows · double glazing Ug 1.0 W/m²K · home built in 1992

PVC tilt-and-turn window6 × standard window ≈ 1.0 × 1.2 m 3 600 €

Large fixed PVC window2 × ≈ 1.4 × 1.4 m 1 600 €

PVC front door1 × glazed door with transom 1 400 €

PVC French door1 × double leaf 1 400 €

Removal & disposalold windows + recycling 700 €

Total work excl. VAT8 700 €

VAT 21% (without reduction)+ 1 827 €

VAT 6% (home over 10 years old)+ 522 €

VAT saving− 1 305 €

Wallonia Prime Habitation (standard cat.)− 800 €

Remaining out-of-pocket ≈ 8 422 € incl. VAT

Indicative 2026 example, VAT and grant calculated on average ranges. Request your quote for a precise estimate including actual VAT and grant.

Go further

FAQ 6% VAT

Your questions about reduced VAT for windows

What are the exact conditions to qualify for 6% VAT?

Three cumulative conditions: (1) the home must have been delivered at least 10 years ago (date of first occupancy), (2) it must be used mainly as a private dwelling, (3) the work must be invoiced by a contractor registered for VAT in Belgium. A certificate signed by the client is given to the installer.

Does the 6% VAT rate also apply to the materials supplied?

Yes, as long as supply and installation are carried out by the same contractor and invoiced together, the 6% VAT rate applies to the entire invoice: windows, glazing, hardware and labour. If you buy the materials separately from a merchant, those remain subject to 21%.

Can the 6% VAT rate be combined with regional grants?

Yes, fully. The 6% VAT rate and the regional grants (Wallonia Prime Habitation, Brussels Renolution grants, Flanders Mijn VerbouwPremie) are two distinct advantages that can be combined. Together, they can represent 25 to 35% of the pre-VAT amount of the work.

What happens if my home is less than 10 years old?

For a home less than 10 years old, the applicable VAT is 21% on the supply and installation of windows. There is no exception to this age criterion. New builds and renovations treated as new builds are fully subject to the standard rate.

Do I have to provide documents to prove the age of my home?

You must sign a certificate stating the year of first occupancy of the building and its main use as a dwelling. This certificate is kept by wendows with the invoice. If there is doubt about the age, an extract from the building permit or the land register may be requested.

Does the 6% VAT rate also apply to finishing work (plastering, painting)?

Yes, provided that this work is invoiced by the same contractor as part of the same renovation operation. Patching, painting the reveals and finishes related to the window replacement benefit from the reduced rate. A separate quote for such ancillary work could be assessed differently by the tax authorities.

Get your quote with 6% VAT applied

We check your home’s eligibility, apply the right VAT rate directly and combine your regional grant. You see the final net price right from the quote.

Free quote with no obligation
6% VAT applied directly if eligible
VAT + regional grant combination calculated automatically

Recevoir mon devis chiffré → 0800 00 000