In this article
Building a corpus is half the job. The other half is turning it into a monthly income without running out. A systematic withdrawal plan (SWP) does that by selling a fixed amount from your investment each month. How long the money lasts depends on three things: the amount you take, the return the rest earns, and how fast you raise your withdrawal.
How an SWP works
You hold a lump sum in an investment, usually a mutual fund. Every month an amount you choose is sold and sent to your bank. The units that remain keep earning. If the return on the balance is higher than your withdrawals, the corpus grows. If not, it shrinks.
The trap: a flat withdrawal feels safe
A flat ₹50,000 looks sustainable because it is smaller than the monthly growth. But prices rise. ₹50,000 today buys much less in 15 years. To keep your lifestyle you must raise the withdrawal, and the SWP then has to carry bigger and bigger amounts.
Each line rises at first because returns exceed withdrawals, then bends down as the yearly rise in the withdrawal catches up. Higher starting amounts bend down sooner.
How long does it last?
Adding just ₹10,000 to the starting withdrawal can cut years from the plan. At ₹30,000 the corpus runs for 44 years.
The three levers
| Return | Rise 0% | Rise 3% | Rise 6% | Rise 8% |
|---|---|---|---|---|
| 6% | 89 yrs | 24 yrs | 17 yrs | 15 yrs |
| 8% | Never ends | 37 yrs | 21 yrs | 18 yrs |
| 10% | Never ends | Never ends | 30 yrs | 22 yrs |
The ringed cell is our example. A flat withdrawal at a 6% return, which is exactly the withdrawal rate, drains very slowly (89 years). A higher return or a lower rise buys many extra years.
Note that the table is a simplified model with a smooth return and fixed yearly rises. It shows direction, not forecast.
Sequence risk: the order of returns matters
A smooth 8% every year is easy to calculate and impossible to find. In real markets, returns come in uneven years. If the early years are bad while you are also withdrawing, you sell more units at low prices, and those units are not there to recover later. This is called sequence risk.
- You withdraw while the balance is low
- More units sold at cheap prices
- Less left to recover when markets rise
- Balance grows early, giving a cushion
- Fewer units sold per rupee withdrawn
- Later falls hurt less
This is why many planners suggest keeping 1 to 2 years of withdrawals in a safer place such as a short-term debt fund or FD, so you do not have to sell in a crash.
A rough withdrawal-rate check
A quick rule is the withdrawal rate: yearly withdrawal ÷ corpus. In our example ₹6 lakh ÷ ₹1 crore is 6%. The old “4% rule” comes from studies on long retirements and is a starting point, not a law, and was built on a different market and currency. See the 25x rule for how it links to your target corpus.
For a retirement that may last 30 years or more, many planners prefer to start near the low end and adjust each year.
SWP versus fixed deposit interest
- SWP sells units, so some of each payout is your own capital. Tax is usually on the gain portion only, but the rules change, so check the current treatment.
- FD interest is fully taxable each year at your slab, even if you reinvest it. Compare after-tax numbers with our FD after tax and inflation guide.
- SWP returns are not guaranteed. An FD’s rate is fixed. An SWP from an equity fund can go up or down.
- You can change an SWP any time. You can raise, cut or stop the payout, which helps in a bad year.
Questions people ask
What is a systematic withdrawal plan?
An SWP is an instruction to sell a fixed amount from your investment every month and send it to your bank, while the rest stays invested.
How long will ₹1 crore last with ₹50,000 a month?
At 8% a year with a flat withdrawal it does not run out. If the withdrawal rises 6% a year, it lasts about 21 years in this model.
What is a safe withdrawal rate?
Many planners start near 3% to 4% for long retirements, but there is no single safe figure. It depends on returns, inflation and how long you need the money.
Is SWP better than FD interest?
It depends on tax, risk and flexibility. An SWP from a market-linked fund can grow and is flexible but not guaranteed. An FD gives a fixed rate that is taxed each year.
What is sequence of returns risk?
It is the risk that poor returns early in your withdrawal period shrink the corpus more than the same returns later, because you sell more units while prices are low.