How to apply for the ISDE subsidy: step by step

Apply for the ISDE subsidy for your heat pump in 5 steps (conditions, notification code, purchase, installation and applying with DigiD), as set out by RVO.

Updated on 17 October 2026

RVO (the Netherlands Enterprise Agency) sets out the ISDE application for homeowners in five steps [1]. Here they are, focused on a heat pump.

Step 1: Check the conditions

You must own the home and live in it yourself, the heat pump must be new and installed by a building installation company, and the home must have been built before 1 January 2019 (or the environmental permit applied for before 1 July 2018) [1][2]. For amounts and exceptions, see ISDE heat pump subsidy 2026.

Step 2: Find the notification code (meldcode)

Before you buy, check that the heat pump is on RVO's notification code list (meldcodelijst) [1]. See How to look up a heat pump's meldcode. You can also search for your meldcode directly in our heat pump list.

Step 3: Buy the heat pump

Ask the installer to put the meldcode on both the quote and the invoice.
Keep your proof of purchase (for example a signed quote or an order confirmation by email) and your proof of payment, such as a bank statement [1].

Step 4: Have the heat pump installed

Install first, then apply. You are not allowed to install it yourself [1]. Make sure the eligible components are itemised separately on the invoice [1].

Step 5: Apply for the subsidy

What you need [1][2]:

The DigiD app or DigiD with SMS verification. Sort this out in good time: it can take a few working days.
The meldcode, or if there is none, the product description and technical documentation.
A description with the model number and brand or manufacturer.
Invoice and proof of payment showing the purchase date, amount and payment date(s).
The installation date.
Your address and the installation company's details (address, contact person, phone number).

Submit your application no later than 24 months after installation. RVO recommends using a computer or tablet; once logged in, the form is under 'Nieuwe aanvraag' (New application) [1].

After you apply

You get an acknowledgement by email with a reference number [1].
RVO aims to decide within 8 weeks. If it cannot, you will receive a letter about an extension after about 7 weeks [1].
Changes (such as your bank account number) or withdrawing your application are done via 'Mijn aanvragen' (My applications) [1].
You can authorise someone to apply on your behalf using RVO's authorisation form; you keep that form yourself [1].

Sources

RVO, ISDE: Subsidie voor verduurzaming van uw woning (checked by RVO on 15 October 2026, accessed 17-10-2026): https://www.rvo.nl/subsidies-financiering/isde/woningeigenaren
RVO, ISDE: Warmtepomp woningeigenaren (accessed 17-10-2026): https://www.rvo.nl/subsidies-financiering/isde/woningeigenaren/warmtepomp

This guide was written with the help of AI and checked against its sources.

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