Retirement calculator
Will it last?
Project your savings to retirement, see the income they could sustain in today’s money, and the monthly top-up needed to reach your target.
Projection — balance in today’s money and nominal
How it’s calculated
Monthly rate i = (1 + annual return)1/12 − 1. Each month: balance = balance × (1 + i) + contribution, with contributions stepping up each year by the escalation rate.
Today’s money = nominal ÷ (1 + inflation)years. Real monthly rate r = ((1 + post-retirement return) ÷ (1 + inflation))1/12 − 1.
Sustainable income = balance (today’s money) ÷ annuity factor, where annuity factor = (1 − (1 + r)−n) ÷ r over the months to the plan age. Required capital = target income × annuity factor.
Extra monthly top-up = shortfall at retirement ÷ future value of R1/month (with escalation). Returns are assumed net of fees and tax.
Today’s money = nominal ÷ (1 + inflation)years. Real monthly rate r = ((1 + post-retirement return) ÷ (1 + inflation))1/12 − 1.
Sustainable income = balance (today’s money) ÷ annuity factor, where annuity factor = (1 − (1 + r)−n) ÷ r over the months to the plan age. Required capital = target income × annuity factor.
Extra monthly top-up = shortfall at retirement ÷ future value of R1/month (with escalation). Returns are assumed net of fees and tax.
Information, not advice. Illustrative estimate based on the assumptions shown.