An income-dependent rent increase is calculated based on your combined rental income, as determined by the Dutch Tax and Customs Administration (Belastingdienst). The landlord uses income data from two years prior (e.g., 2022 for an increase in 2024). The formula is: maximum increase = rent price × (income-dependent percentage × income index). For 2024, the percentage in the unregulated sector is 5.3% for incomes above €47,699, and lower for lesser incomes.
Step 1: Request your income statement via [Mijn Belastingdienst](https://www.belastingdienst.nl).
Step 2: Verify whether your property falls under the scheme (rent price limit of €808.06 for the unregulated sector in 2024).
Step 3: Compare the proposed increase with the statutory maximum. If exceeded, you may lodge an objection with the [Rent Tribunal (Huurcommissie)](https://www.huurcommissie.nl). Note: Only the net rent increase counts; service charges do not apply. Landlords must submit the proposal before 1 May. If your income decreases, you may apply for an exemption. This calculation protects middle incomes but requires vigilance regarding errors in income data.