SWP Calculator
How long your corpus lasts under monthly withdrawals with inflation step-up - plus the largest withdrawal that survives the full term.
An SWP calculator shows how long a mutual fund corpus lasts when you withdraw a fixed amount every month; Richlify also shows the exact month the corpus runs out and the largest withdrawal that survives the full term.
Your SWP inputs
CORPUS AT WITHDRAWAL START
₹0
Grown through the hold period
MAX SAFE MONTHLY SWP
₹0/mo
Survives the full term
TOTAL WITHDRAWAL
₹0
Over the whole plan
CLOSING BALANCE
₹0
At the end of the term
How this is calculated
The calculator runs a month-by-month simulation rather than applying a single formula, because a withdrawal plan behaves differently depending on the order in which growth and withdrawals happen.
Your lump sum first grows untouched through the hold period. Invest ₹25 lakh at 10% and defer withdrawals for five years, and the corpus compounds to ₹40,26,275 before the first rupee comes out. That figure is shown as corpus at withdrawal start, and it is the real base your plan runs on — not the amount you originally invested.
From the first withdrawal month onward every month follows the same three steps: the balance earns one month of growth, the scheduled withdrawal is removed, and the remainder carries forward. Growth uses an effective monthly rate — (1 + annual return) raised to the power of one twelfth, minus one — rather than dividing the annual rate by twelve. On a 10% return that is 0.797% a month, not 0.833%. Across 240 months the difference compounds, and it is why two calculators can disagree by more than a lakh on identical inputs.
With the inflation step-up switched on, the withdrawal stays constant for twelve months and then rises by the inflation rate. A ₹15,000 first withdrawal growing at 7% reaches ₹54,248 in the twentieth year. Most SWP calculators omit this entirely, and it is the single biggest reason a plan that looks comfortable elsewhere runs dry here.
Two outputs deserve explanation. Maximum safe SWP is the largest first withdrawal whose schedule ends at exactly zero across your full term, including every annual step-up. It is solved in closed form rather than by trial and error, so it recalculates instantly as you change inputs. Withdraw less and you leave a balance behind; withdraw more and you deplete early.
Depletion point is the exact month the balance can no longer fund the scheduled withdrawal. Each withdrawal is capped at the available balance, so the corpus settles at zero rather than turning negative — the schedule shows you precisely when the plan stops working instead of quietly producing an impossible number.
Tax figures are indicative and are deliberately not deducted from the balance, because capital gains tax is settled through your income-tax return rather than at the point of withdrawal.