Do I also get a tax advantage on reserveringsruimte?

Yes, exactly the same as with your regular jaarruimte. You deduct the contribution from your taxable income in box 1 under 'uitgaven voor inkomensvoorzieningen'.

You deduct at your box 1 bracket rate, up to 49.50% in 2026. In 2026 you may declare a maximum of €42,753 in reserveringsruimte. Calculate with the reserveringsruimte calculator.