See what hypotheekrenteaftrek is actually worth to you. On a €65,000 salary with a €450,000 WOZ value home and €8,000 of annual mortgage interest, the deduction is worth about € 2.413/year (€ 201/month), applied at 37.56%. Enter your own numbers below.
Deduction cap
37.56%
2026, even in top band
EWF rate
0.35%
of WOZ value, standard bracket
Applies to
Primary residence
eigen woning only
Box
Box 1
employment income
Primary residence (eigen woning) only. Deduction is capped at 37.56% in 2026, even if your marginal rate is higher.
Estimated annual tax saved
€ 2.413
€ 201/month, applied at 37.56%
Breakdown
| Eigenwoningforfait (notional rental value, added to income) | € 1.575 |
| Mortgage interest paid (annual) | € 8.000 |
| Net deductible amount | € 6.425 |
| Your marginal Box 1 rate | 37.56% |
| Rate applied to this calculation | 37.56% |
| Tax saved | € 2.413 |
The eigenwoningforfait (a notional rental value based on your home's WOZ value, 0.35% for the €75,000–€1,350,000 bracket in 2026) is always added to your Box 1 income. If your mortgage interest exceeds it, the difference is deductible, capped at 37.56% even if your marginal rate is the top 49.50% band. If your interest is lower than the forfait (common on a small or nearly paid-off mortgage), the shortfall is added to your taxable income instead, at your real marginal rate, with no cap. This calculator estimates your marginal rate from salary alone and doesn't model Wet Hillen (a partial relief for long-time low-or-no-mortgage owners). Confirm your exact figures with the Belastingdienst or a tax adviser.
Owning your home in the Netherlands cuts both ways in Box 1. Every homeowner has a notional rental value, the eigenwoningforfait, added to their taxable income, based on the WOZ value the municipality assigns the property. Against that, mortgage interest paid on the loan used to buy, build, or improve that same home is deductible. What actually lands in your pocket is the net of those two: interest minus forfait.
The government has steadily eroded how valuable that deduction is for higher earners. Since 2014 the deductible rate has been capped below the top marginal tax rate, and in 2026 that cap sits at 37.56%, the same as the second Box 1 band. Someone whose income already sits in the top 49.50% band still only gets the deduction at 37.56%, not their real marginal rate, on the interest portion. The forfait addition, by contrast, is always taxed at your real marginal rate, uncapped.
This means the deduction is most valuable for people with a large mortgage relative to a modest home value and moderate income, and least valuable, sometimes even negative, for someone with a small remaining mortgage on an expensive home, where the forfait can outweigh the interest entirely.
Keep your numbers current
Tax rates and allowances change every year
Get an email when we update this calculator for new rates, so you're never planning from stale numbers.
Hypotheekrenteaftrek is the Dutch mortgage interest deduction: interest paid on a mortgage for your primary residence (eigen woning) can be deducted from your Box 1 taxable income, lowering the income tax you owe. It applies only to a loan used to buy, build, or improve the home you actually live in, not to a second home or investment property.
Since 2014 the Dutch government has gradually reduced the rate at which mortgage interest can be deducted for higher earners, so that the tax benefit doesn't scale all the way up to the top 49.50% Box 1 rate. In 2026 the deduction is capped at 37.56%, matching the second Box 1 band rate. If your marginal rate is 35.75% (the first band), you deduct at your own 35.75% rate since that's already below the cap.
The eigenwoningforfait (EWF) is a notional rental value added to your taxable income for owning your home, based on its WOZ value (the municipal valuation). For 2026 it's 0.35% of WOZ value for homes valued between €75,000 and €1,350,000. You only get a net tax benefit if your deductible mortgage interest is higher than this forfait; if your mortgage is small or nearly paid off, the forfait can exceed your interest and add to your taxable income instead.
Your municipality (gemeente) sends an annual WOZ-beschikking (valuation notice), usually in February, and you can also look it up for any Dutch address via the WOZ-waardeloket. Use the most recently issued value for the year you're filing.
No. Hypotheekrenteaftrek only applies to your own primary residence, taxed under Box 1. A second home or a property you rent out to others is taxed under Box 3 (savings and investments) under different rules entirely, which this calculator doesn't cover.
It uses the confirmed 2026 Box 1 bands, the 37.56% mortgage interest deduction cap, and the 0.35% eigenwoningforfait rate for the standard WOZ bracket. It estimates your marginal rate from salary alone rather than re-running the full Box 1 calculation with the eigen-woning adjustment applied, and it doesn't model Wet Hillen, a partial relief for owners with a very small or fully paid-off mortgage. Confirm your own figures with the Belastingdienst or a tax adviser before filing.
Related reading
Check your full Netherlands take-home pay or the 30% ruling.
What to check next
Start with a clear view of the salary and market conditions behind your plan.