See how long to reach one million with compound interest.
Reaching one million reais is a common financial milestone in Brazil. This tool shows how compound interest accelerates the path — a consistent monthly contribution at a reasonable return rate gets there faster than most people expect.
The calculation uses monthly compounding. It splits the final balance into the total you invested and the interest earned, so you can see how much of the million is your money versus the market doing the work.
The return rate is an assumption — real returns fluctuate year to year. Use a conservative estimate (below the current CDI rate) to avoid overestimating how quickly you will get there.
A = P × (1 + r)^n + C × ((1 + r)^n − 1) / r, solving for n when A = target.
No. Everything runs locally in JavaScript on your device — nothing is transmitted or stored.
No. This is an educational tool for estimates only. Real financial decisions depend on fees, taxes and personal circumstances — consult a qualified professional.
The tool uses the latest publicly available rates and tables. You can verify the values against the official sources linked on the page.
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