Amsterdam detached home: raise €3,719 rent or prioritise a reliable tenant?

I have a one-bedroom detached home in Amsterdam currently rented for about €3,719 per month. Comparable asking rents appear to be around €4,117, but the tenant pays reliably and looks after the property.

The full difference is €398 a month. I am considering a smaller adjustment rather than pushing straight to the apparent market level, because a departure could mean vacancy, refurbishment and reletting costs. How would others structure a fair rent discussion while complying with the applicable local notice and increase rules? I would particularly value ways to account for payment reliability and maintenance history without simply guessing at a discount.

Start with the permitted increase, not the advertised figure. Whether and when you can adjust the rent may depend on the tenancy terms and how the home is classified under Dutch rules. Asking rent is also not proof that comparable homes actually let for €4,117. Once those points are clear, a modest increase with proper notice seems more defensible than demanding the entire gap.

What makes the comparables genuinely comparable: detached, one bedroom, similar condition, location and included services? Also, how long has this tenant been paying €3,719, and have previous increases or substantial maintenance been deferred? Those facts affect whether this is a routine annual adjustment or a bigger attempt to catch up.

Purely on the arithmetic, the maximum apparent gain is €398 monthly, or €4,776 over a year. One vacant month at the €4,117 asking level would consume most of that first-year gain before advertising, cleaning or refurbishment. That strongly favours retention—but I would not promise a permanently discounted rent. Explain the evidence, propose a permitted staged adjustment, and set a future review date.

I disagree slightly with treating one month’s vacancy as the deciding calculation. Keeping the rent materially behind the market can compound over several years, and a good tenant may accept a properly explained increase. The stronger case for moderation is that asking prices can be optimistic. I would compare several truly similar listings, remove obvious outliers, then discuss a figure below the apparent €4,117 ceiling.

Before sending anything, make a short file containing the lease terms, previous rent changes, maintenance record and comparable listings. Confirm the allowed timing, notice and amount for this particular tenancy with someone familiar with current Amsterdam and Dutch requirements.

Then approach the tenant early and separately from any maintenance discussion. If they might leave, ask about likely timing so you can estimate vacancy realistically. Also keep deposit handling distinct from turnover refurbishment: document the condition carefully and follow the tenancy terms and local rules rather than assuming the deposit covers ordinary wear.