SWP Calculator

What Is an SWP Calculator?

An SWP calculator tells you how much money you can withdraw every month from your mutual fund investment, and how long your corpus will last at that withdrawal rate. You enter your starting investment, expected rate of return, and the amount you want withdrawn each month, and the calculator does the rest.

A Systematic Withdrawal Plan (SWP) is the reverse of a SIP. Instead of putting money in every month, you take a fixed amount out every month while the rest of your money stays invested and keeps earning returns.

Why Investors Use SWPs

Retirees and anyone who wants a regular monthly income from a lump sum use SWPs instead of parking money in a savings account or a Post Office MIS. The core appeal is that your uninvested balance keeps growing, so a well-planned SWP can pay you for years without fully draining your capital.

It also has a tax edge over interest income. When you redeem mutual fund units under an SWP, only the gain portion of each withdrawal is taxed, not the full amount, unlike interest from an FD or Post Office scheme, which is taxed in full every year.

How the SWP Calculation Works

Each month, two things happen to your corpus:

• It grows by that month’s rate of return (your expected annual return divided by 12).
• It shrinks by the fixed amount you withdraw.

This repeats until either your chosen tenure ends or the corpus runs out, whichever comes first. Because the growth and withdrawal happen every month, the math needs to be run month by month rather than solved in one formula, which is exactly what an online calculator automates.

Here A is your starting corpus, W is the monthly withdrawal, i is the monthly rate (annual return divided by 12) and n is the number of months. This calculator assumes the withdrawal is taken at the end of each month.

Worked Example

Say you invest ₹25 lakh in a mutual fund expected to grow at 10% a year, and withdraw ₹15,000 every month.

At a 10% expected return against a ₹1.8 lakh annual withdrawal, which is 7.2% of the initial corpus, the corpus does not merely survive — it grows, because the return outpaces the withdrawal. Push the withdrawal to ₹25,000 a month, or 12% of corpus annually, and the balance declines steadily and is exhausted in about 15 years. This is why the withdrawal rate relative to the expected return matters far more than the starting amount.

The Safe Withdrawal Number

There is one figure worth knowing before you set up an SWP: the monthly return your corpus earns on its own, which is corpus multiplied by the monthly rate. Withdraw less than that and your capital is never touched. Withdraw more and the balance starts eroding, slowly at first and then faster. The calculator shows this figure as your safe monthly withdrawal.

Tax Treatment of SWP Withdrawals

Each SWP withdrawal is treated as a partial redemption of units, so it attracts capital gains tax, not income tax:

• Equity funds: units held over 12 months are taxed at 12.5% LTCG on gains above ₹1.25 lakh a year; units held under 12 months attract 20% STCG.
• Debt funds: gains are added to your income and taxed at your slab rate, regardless of how long you held the units, following the 2023 amendment that removed indexation benefits for debt funds.

Because only the gain component is taxed, and older units usually have a lower gain-to-cost ratio in the early years, the effective tax rate on an SWP is often lower than tax on FD or Post Office interest.

SWP vs Dividend Option vs FD Monthly Income

Key Takeaways

• An SWP calculator estimates your monthly payout and how long your investment will last, based on your corpus, expected return, and withdrawal amount.
• The withdrawal rate relative to expected returns decides whether your corpus grows, stays flat, or depletes.
• Only the gain portion of each withdrawal is taxed as capital gains, not the full withdrawal amount.
• Equity fund SWPs are taxed at 12.5% LTCG above ₹1.25 lakh a year, or 20% STCG; debt fund SWPs are taxed at your income slab rate.