SWP Calculator

Whether Your Money Lasts Depends on a Race

An SWP is a race between your withdrawal rate and your corpus's growth rate. If your fund's returns consistently outpace what you withdraw each month, your balance can actually grow even while you're taking money out. If withdrawals consistently exceed returns, the corpus shrinks and eventually runs out — the further your monthly withdrawal is above what your assumed return alone would generate, the sooner that happens.

This calculator applies your assumed annual return evenly across every month and subtracts your fixed withdrawal each month, compounding what remains. It's a useful way to sanity-check whether a withdrawal rate is broadly sustainable, but it assumes a perfectly smooth return every single month — real markets don't behave that way, which is the single biggest limitation of any SWP projection.

Worked Example

₹20,00,000 lumpsum, ₹15,000 monthly withdrawal, 8% p.a. assumed return, 15-year horizon:

Even after withdrawing more than the original corpus in total (₹27 lakh withdrawn from a ₹20 lakh starting balance), over ₹14 lakh remains — because the 8% return on the remaining balance outpaced the withdrawal rate for most of the period. This only holds because the calculator assumes a steady 8% every month; a sequence with a few sharply negative early years, even with the same average return, could deplete the corpus considerably faster.

How the Withdrawal Rate Changes the Outcome

Keeping the same ₹20,00,000 corpus, 8% p.a. assumed return, and 15-year horizon, only changing the monthly withdrawal amount shows how sensitive the outcome is to that one number:

A relatively modest step-up in monthly withdrawal — from ₹10,000 to ₹15,000, a 50% increase — cuts the projected final balance by more than half under the same assumed return. Push the withdrawal higher still, to say ₹20,000 a month on this same corpus and assumed return, and the corpus would run out entirely before completing the 15-year term rather than leaving anything behind — the exact month this happens depends on how the shortfall compounds, which is best checked by running that figure through the calculator above rather than estimating by hand.

Sequence-of-Returns Risk: Why the Order of Returns Matters

Two SWPs with the identical average annual return over the same period can end with very different final balances, depending purely on the order the good and bad years arrive in. If a market downturn hits early in your withdrawal period, you're forced to sell more units at depressed prices just to fund the same fixed monthly withdrawal, permanently reducing the units available to benefit from the eventual recovery. The same downturn arriving late in the period, after years of growth have built a larger cushion, does comparatively less damage.

This is called sequence-of-returns risk, and it's most dangerous in the first few years of a withdrawal phase — precisely when many people begin an SWP for retirement income. This calculator's constant-rate assumption cannot show this risk at all; it's worth mentally stress-testing your plan against a scenario where the first two or three years underperform your assumed average.

SWP vs SIP

SIP and SWP are mirror images of each other. A SIP is a series of regular investments building a corpus over time, buying more units when prices are low and fewer when prices are high. An SWP is a series of regular withdrawals drawing down a corpus, which has the reverse effect — a fixed rupee withdrawal redeems more units when the NAV is low and fewer units when the NAV is high, meaning a downturn during your withdrawal phase erodes your unit count faster than the same downturn would during an accumulation phase.

Tax on SWP Withdrawals

Each SWP withdrawal from a mutual fund is treated as a partial redemption, triggering capital gains tax on the gain portion of that specific withdrawal — not on the whole withdrawal amount. For equity-oriented funds, gains from units held over 12 months are long-term, taxed at 12.5% above the ₹1.25 lakh per-year exemption; units held 12 months or less are short-term, taxed at the applicable short-term rate.

This makes SWP generally more tax-efficient than an equivalent interest payout from a fixed deposit, where the entire interest is taxable at your slab rate with no exemption threshold — with an SWP, only the gain portion of each withdrawal is taxed, and a meaningful part of every withdrawal is simply a return of your own principal, which isn't taxed again.

SWP vs an Annuity or Pension Product

Unlike an SWP, an annuity or pension product typically contracts to pay a fixed amount for life (or a fixed term) in exchange for handing over the lumpsum upfront — trading the flexibility and potential upside of an SWP for a payout that doesn't depend on market performance or run the risk of the corpus running out early. The trade-off is usually a lower headline payout rate and the loss of control over the underlying corpus, since it's no longer yours to redeem, adjust, or leave to your heirs the way an SWP's remaining balance is.

Choosing a Withdrawal Rate

A common starting point discussed in retirement planning is keeping your annual withdrawal rate meaningfully below your corpus's expected long-term return, leaving a buffer for years when actual returns fall short of the assumption — but the specific rate that's sustainable for you depends on your corpus size, time horizon, other income sources, and risk tolerance. There's no single number that fits every situation; treat any rule-of-thumb withdrawal percentage as a starting point for discussion, not a fixed formula.

What This Calculator Doesn't Model

Besides assuming a constant monthly return, this tool doesn't factor in inflation eroding the purchasing power of a fixed monthly withdrawal over a long horizon, nor does it account for exit loads on early redemptions or the tax deducted from each withdrawal (mutual funds don't deduct TDS on redemptions the way banks do on FD interest, but you still owe tax on the gain when filing your return). Treat the final balance and total-withdrawn figures as an illustration of the mechanics, not a complete retirement income plan.

SWP as Part of a Broader Retirement Income Plan

In practice, most people relying on SWP income don't draw purely from one fund at one assumed rate — they combine it with other sources such as pension income, rental income, or a fixed-rate instrument like an SCSS or FD, precisely because those give a more predictable floor of income to fall back on if the market-linked portion underperforms in a given year. Treating an SWP as the sole source of retirement income concentrates you fully in sequence-of-returns risk; blending it with a fixed-rate component gives you flexibility to draw less from the market-linked portion during a downturn, letting it recover before you resume larger withdrawals.

A related practical approach some retirees use is holding one or two years' worth of planned withdrawals in a liquid or short-term debt fund, topped up periodically from the main corpus during good years — this way, a downturn in the equity portion doesn't force you to redeem units at depressed prices to fund that month's withdrawal, addressing the sequence-of-returns problem described above without needing to change your long-term asset allocation.