Wet modernisering servicekosten: how to explain the new rules before the complaints start

The first email might already be sitting in your inbox. A tenant has read something about new rules for servicekosten (service charges) and wants to know if their advance payment is going down. Your colleague at the service desk looks it up and finds two dates: a news article about 1 July 2026 and another about 1 January 2027. The question lands on your desk, with the comment "do you know how this works?"

That confusion makes sense, and you'll run into it more often over the coming months. The Wet modernisering servicekosten (service charge modernisation act) was originally due to take effect on 1 July 2026, but Rijksoverheid confirmed on 1 April 2026 that the act now comes into force on 1 January 2027. Aedes itself lobbied for that postponement, because otherwise landlords would have had to run two settlement systems side by side for the 2026 financial year. Good news for your administration, but it also means tenants will keep coming across messages with different dates for months to come.

What the Wet modernisering servicekosten actually changes

The core of the act is an exhaustive list: eight precisely defined categories of servicekosten that you as a landlord are allowed to pass on. Right now, open standards and case law determine what counts as reasonable, and that is exactly what many disputes at the Huurcommissie (rent tribunal) are about. Soon it will be written down in black and white which items do and don't belong in the advance payment. Some familiar categories merge in the process: waste, caretaking and communal areas fall together under supervision, security and waste. Utilities with an individual meter will also fall under servicekosten from now on.

On top of that, the Huurcommissie gets broader powers. It will soon be able to review every item in an advance payment, and smaller groups of tenants will find it easier to file a collective request. So expect tenants who have doubts about their statement to find a formal route faster than they do today.

Caps and deadlines your administration needs to align with

According to Aedes's overview, concrete caps are coming. For insurance and maintenance funds, a maximum of 6 euros per month applies, and the reserve in such a fund may not exceed three times the annual contribution. Administration costs are capped at 2 percent for utilities and 5 percent for other items, within a range of 7.50 to 75 euros per home per year.

More important for your process: the annual statement must reach the tenant by 1 July at the latest. If you don't deliver it, the Huurcommissie applies standard amounts. A forgotten statement is then no longer just an oversight, it's something that can cost you money directly.

Two regimes side by side, and why that becomes your job to explain

The new rules apply to tenancy agreements signed on or after 1 January 2027. Existing contracts keep the current system, unless you and the tenant agree together to switch. That sounds like a calm transition, but in practice it means you'll be managing two regimes side by side for years. Two neighbours in the same building could end up with differently structured servicekosten statements, and that comparison between neighbours is exactly where questions and complaints start.

On top of that, tenants' search for information has already begun. Anyone searching for the new rules now finds news articles with the old start date of 1 July 2026 next to articles about 1 January 2027. If your team doesn't have one clear answer ready, every individual question will start to take on a life of its own.

Start with a standard answer, not a system overhaul

You don't have to convert your administration until 1 January 2027, but your communication can't wait. A practical order to follow:

Write a standard half-page answer for your service desk first: what's changing, from when, and who it does and doesn't apply to. Explicitly include that the start date has shifted from 1 July 2026 to 1 January 2027, because that's the confusion you're already receiving.

Then go through your current rental offers. Every contract starting on or after 1 January 2027 falls under the new rules, so you'll want to build up those advance payments according to the eight new categories from the start.

Finally, make a deliberate decision about whether you want to voluntarily harmonise existing contracts. One system across your whole portfolio saves years of duplicate explaining, but it requires each tenant's consent. Even if you decide not to, that's a decision you want to be able to explain, because the first tenant to ask about it is probably already on the phone.