Heat pump subsidy: how to apply for ISDE
Updated on 5 min read
ISDE for an air-to-water heat pump: who can apply, which documents you need and how to fill in eLoket after installation.
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For an air-to-water heat pump (hybrid or all-electric) you can apply for ISDE as an owner-occupier. Have it installed first by a building-installation firm, then file in eLoket with DigiD, within 24 months. An air conditioner that blows warm air is out.
What is ISDE for a heat pump?
Heat pumpThe ISDE (Dutch) is the national fund that pays back part of the cost of an air-to-water heat pump. Hybrid and all-electric both qualify, as long as the unit heats your home or hot water. You already heat your home. This fund can bring the purchase down.
The same fund also covers other measures, such as insulation or a solar water heater. We do not spell those routes out here; the current list is on the homeowner page (Dutch). A home battery is not on it. That is covered under home battery subsidies.
What you get back this year is in our ISDE year guide for heat pumps. This page is the steps: who can apply, what you fill in, which papers you keep.
Who can apply?
ISDE for homes is for owner-occupiers (Dutch): you own the home and you live in it. Renting does not qualify. Business premises have a separate desk, with different conditions.
The unit is new. Second-hand does not count. You use it for space heating or domestic hot water, not a tumble dryer. New units on the notification-code list (Dutch) have at least label A++. The home was built before 1 January 2019 (Dutch), or you show that the environmental permit was applied for before 1 July 2018.
Not sure whether your home and unit fit? The ISDE check gives a first indication. Not a decision, just a direction.
Air-to-water yes, air-to-air no
The notification-code list covers air-to-water, ground-to-water and water-to-water. Air-to-air heat pumps are excluded (Dutch). An air conditioner that blows warm air into one room is therefore outside the fund, even if the brochure calls it a heat pump. We put the difference side by side in air-to-air versus air-to-water.
Hybrid or all-electric barely changes the application itself: both routes can qualify. What fits your insulation is in insulation for a heat pump and in the comparison of hybrid versus all-electric.
How do you apply?
You apply after installation, not before. A building-installation firm (Dutch) does the full job; DIY does not count. You then have 24 months (Dutch) to file. You log in with the DigiD app or DigiD plus SMS. In My RVO (Dutch) you choose New application.
Five steps to the application
Check the conditions
Find the notification code
Buy the unit
Have it installed
Apply in eLoket
After sending you get a confirmation with a reference number. A decision or reply follows within 8 weeks (Dutch). If that slips, you get a note about extra time. We do not file ISDE for you. The notification code is on page 5 of the quote.
Which papers do you keep?
With the application you supply at least: the notification code (Dutch) (or the product description plus technical documents if there is no code yet), brand and type number, invoice and proof of payment, the installation date, and contact details for the installer. At SolarFast the notification code is on page 5 of the heat pump quote.
Keep the signed quote or order confirmation and the bank statement. Those two together are purchase and payment. Without them you cannot finish the form.
Notification code: on the list or not
The notification-code list (Dutch) is an overview of units already assessed. If your type is on it, you enter that code. If it is not, you may still apply with product documents. That is not an automatic refusal. The desk then checks whether the unit meets the rules. You cannot derive rights from that list.
In the ISDE check you search by brand or type in our list for this month. If it is not on there, that does not mean you get no subsidy. It means: bring the papers, and in the quote we check the type with you.
What SolarFast prepares for you
The heat pump page shows how we choose hybrid or all-electric. The notification code is on page 5 of the quote. You file in eLoket (Dutch) with your own DigiD. Want us to look with you?
Solar panels are still a smart investment in 2026. A few things matter if you want the most from your own power.
Your energy use
Planning to drive, cook or heat electrically? Factor that into how many panels you install now.
Spread the yield
Spread panels across roof faces so you generate through the day and use more of your own energy.
Your data
Choose a system with its own 4G connection and data storage in Europe so your information stays secure.
Boost your energy
A smart home battery stores today's power for later, so you use more of your own electricity after sunset.
We install your heat pump
Usually within a few weeks. Our installers fit the heat pump and calmly explain how it works.
- Use structurally less gas
- Comfort all year round
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Frequently asked questions
After installation, not before. You have 24 months from the fitting date. DIY does not count: a building-installation firm has to do the work.
Usually within 8 weeks of sending. If it takes longer, you get a message. Until then you keep the reference number from the confirmation email.
No. Air-to-air is outside the fund. For an air-to-water heat pump, hybrid or all-electric, you can apply. The difference is in air-to-air versus air-to-water.
Helpful, not required. If it is on the list, you enter the code. If it is not, you send product documents with the application. That is not a refusal in advance.
Each type has its own notification code. In the ISDE check you pick brand and type. In the quote the code is on page 5, in the subsidy information sheet.
No. You file in eLoket (Dutch) with DigiD. The notification code is on page 5 of the quote, or you search the type in the ISDE check.
Not through the homeowner desk. That is for people who own the home and live in it. The landlord may have a different route.
Yes. The home was built before 1 January 2019, or the environmental permit was applied for before 1 July 2018. Newer than that falls outside this scheme for homeowners.
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