Compound Interest Calculator — Portugal

See how your investments grow after 28% mais-valias tax. Free compound interest calculator for Portuguese investors.

Considerações fiscais para investidores portugueses

Imposto sobre Mais-Valias

Flat 28% tax on capital gains from financial assets.

No Annual Exemption

Portugal does not offer a tax-free allowance for capital gains from stocks and ETFs.

Engagement Option

You can opt to aggregate gains with other income if your marginal rate is lower than 28%.

Disclaimer: This is a simplified calculation. Actual taxes depend on your personal situation, annual exemptions, and when gains are realized. Consult a tax advisor for accurate advice.

Frequently Asked Questions

What return rate should I use?

Historical global stock market returns average 7-10% per year. Use 7% for a conservative estimate that accounts for inflation.

Does this calculator account for inflation?

No, results are shown in nominal terms. Subtract 2-3% from your return rate for a rough inflation-adjusted estimate.

How accurate is this calculation?

This is a simplified estimate. Actual taxes depend on your personal situation, holding period, and local regulations. Consult a tax advisor for precise numbers.

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