Tools

Tax Calculators

Free tools for European investors. All calculations run in your browser — no data is sent to any server.

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Dutch Box 3 Estimator

2025 tax year

Estimate your Box 3 wealth tax based on savings, investments, and property. Applies the 2025 notional return rates and €57,684 threshold.

NetherlandsWealth TaxBox 3

Open calculator →Read the guide

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Vorabpauschale Calculator

2026 base rate: 3.20%

Calculate your Vorabpauschale (advance lump-sum tax) for ETF holdings held in a German depot. Applies Teilfreistellung by fund type and your Freistellungsauftrag.

GermanyETF TaxVorabpauschale

Open calculator →Read the guide

Disclaimer: These calculators provide estimates only. Tax rules change annually and individual circumstances vary. Always consult a qualified tax adviser before making decisions. Boursee is not a regulated tax or financial adviser.