What this calculator does

Projects how your Tax-Free Savings Account (TFSA) will grow using monthly compound interest, and compares it to an equivalent taxable investment account. It also tracks your contributions against the SARS R46,000 annual limit and R500,000 lifetime limit.

How to interpret your results

Your projected TFSA value reflects monthly compounding with contributions made at the start of each month. The taxable-equivalent value shows what the same contributions would grow to in a taxable account at your marginal tax rate, so you can see the rand value of investing tax-free.

Assumptions applied

• Returns compound monthly, with contributions made at the start of each month.
• Contributions are automatically capped once your lifetime contributions reach R500,000 — additional amounts are not invested in this projection.
• Tax comparison uses a simplified model — all investment returns are treated as ordinary income taxed at your marginal rate. Actual tax treatment varies by asset class (interest, dividends, capital gains).
• The R46,000 annual limit and R500,000 lifetime limit are based on the SARS 2026/27 tax year rules.
• Expected annual return is held constant for the full investment horizon — real returns vary year to year.

What this calculator doesn't account for

• Does not apply the 40% SARS penalty tax on excess contributions — it only flags when you would exceed a limit.
• Does not account for contributions to other TFSA accounts you may hold with different providers — enter your combined lifetime contributions to date for an accurate result.
• Does not adjust for inflation — projected values are in today's rand terms at the entered return rate.
• Does not account for fees charged by your TFSA provider, which reduce your effective return.