Why a contribution costs less than it looks
Contributions to a pension fund, provident fund or retirement annuity are deducted from your income before PAYE is worked out. So every rand you contribute lowers your tax by your marginal rate: at 31%, a R1,000 contribution saves R310 of PAYE and really costs R690.
The limits
For 2026/27 you can deduct up to 27.5% of the greater of your remuneration or taxable income, and no more than R430,000 a year, up from R350,000. Anything above the limit gets no relief this year but carries forward to later years and to retirement.
What this calculator leaves out
It takes your own contributions only. Employer contributions are taxed as a fringe benefit and then treated as yours for the deduction; the guide explains how.