New Box 3 regime introducing capital-gains and capital-growth tax
Following successive Supreme Court rulings finding the current Box 3 deemed-return regime unlawful, the government committed to a new Box 3 system from 2027. The new regime taxes actual capital growth on savings and actual capital gains on investments annually, replacing the fictitious-return basis used since 2001. Interim measures under the Restoration of Rights Act continue to apply until 2027.
Who it affects: All Dutch tax residents with savings or investments above the tax-free allowance.
Ministerie van Financiën ↗ · Government of the Netherlands ↗ · Belastingdienst (Dutch Tax Authority) ↗ · verified 2026-04-19