Up to €111 per m² subsidy on windows
The ISDE scheme (Investment Subsidy Sustainable Energy) makes new windows with insulating glass much more affordable. Budget 2026: over €500 million.
Subsidy amounts 2026
The amount of subsidy depends on the type of glass you choose.
HR++ glass
U-value glass: ≤ 1,2 W/m²K
Window replacement not required
Triple glass in new windows
U-value glass: ≤ 0,7 W/m²K
Window replacement required
Bonus: Combining two or more insulation measures within 24 months? The subsidy amount per measure is doubled!
How much subsidy do you get back?
Examples with triple glass (€111/m²).
Terraced house (8 windows)
~12 m² · Triple glas
€1.332
Corner house (12 windows)
~18 m² · Triple glas
€1.998
Semi-detached (15 windows)
~24 m² · Triple glas
€2.664
Detached (20 windows)
~35 m² · Triple glas
€3.885
Apply for subsidy in 4 steps
Choose your windows
Configure your windows with triple glass via our tool.
Have them installed by a certified company
Filplast arranges installation by certified technicians.
Take before and after photos
Document the old and new situation.
Submit application to RVO
Within 24 months after installation. We help with the required documents.
Conditions
Comfortable living with lower energy costs
Combine subsidy and financing?
Via the National Heat Fund you can finance your windows from 0% interest. Pay monthly and receive your ISDE subsidy at the same time.
More about financingWant to know more about subsidy?
Our subsidy experts calculate without obligation how much you can get back for your situation.
Mon-Fri 9:00-18:00 · Average response: 2 hours
Calculate your price including subsidy
Use our configurator to see directly what your new windows cost — and how much you get back.