Portfolio Simulator
Add your positions, see the impact on your exemption and simulate sales to optimise your tax position.
What is the capital gains tax?
From 1 January 2026, Belgium taxes profits on the sale of financial assets (stocks, ETFs, funds, crypto, etc.) held by private individuals. The tax only applies to gains — if you sell at a loss, you owe nothing on that sale.
How does this simulator work?
Add your investment positions, enter purchase prices and current values, and the tool calculates your estimated tax. Use the simulation tab to model 'what if I sell X units?' scenarios. Everything is calculated locally in your browser — no data leaves your device.
Who does this apply to?
All Belgian tax residents (natural persons) who hold financial investments. Companies and non-residents are not subject to this tax. The tax applies regardless of how long you've held the investment.
These insights are based on the data entered and do not constitute advice.
No positions
Add your first position to calculate your capital gains tax and simulate sales.
See the simulator in action with example positions
This is an educational simulation tool and does not constitute tax, legal, or investment advice. Calculations are simplified and based on legislation in force from 1 January 2026. Your actual tax position may differ due to individual circumstances. Always consult a qualified tax adviser before making decisions about your portfolio.