Dutch tax glossary
What is Box 3?
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Definition
Box 3 is the Dutch wealth box that taxes a notional return on savings and investments above an exemption, using rules that can change by tax year.
Dutch term: Box 3
For 2026 planning, the Belastingdienst publishes a provisional Box 3 method. Our Box 3 calculator follows that provisional approach and is not a substitute for your return.
Coverage gap
We do not calculate every asset class nuance or actual-return litigation outcomes. Check the current Belastingdienst pages before filing.
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FAQ
What is Box 3 in simple terms?
Box 3 is the Dutch wealth box that taxes a notional return on savings and investments above an exemption, using rules that can change by tax year.
Is this personal tax advice?
No. These pages are educational estimates. Use your payslip, assessment, employer, Belastingdienst guidance, or a qualified adviser for personal decisions.
Educational definitions only. Read our methodology or report a correction.