What is the SWP calculator?
A Systematic Withdrawal Plan (SWP) is a mutual fund facility that allows you to withdraw a fixed sum of money at regular intervals (usually monthly) from your existing investment corpus. While you make withdrawals, the remaining balance continues to compound in the fund. This SWP calculator estimates how long your retirement or dividend corpus might sustain these monthly payouts.
Think of an SWP as the exact opposite of a SIP. In a SIP, you buy units of a fund month-by-month to accumulate wealth. In an SWP, you redeem a fraction of your units month-by-month to generate a steady paycheck. It is highly popular among retirees, freelancers, and anyone seeking a tax-efficient cash flow from their accumulated capital.
You enter your total starting investment, monthly withdrawal amount, expected annual return rate, and withdrawal period. The tool calculates your total cash withdrawn, the estimated final value of your remaining corpus, and the sustainability of your payouts.
How do SWP calculators work?
Each month, the calculator applies the effective monthly return to your remaining corpus, and then deducts your fixed withdrawal amount. This simulation runs month-by-month until the tenure ends or the corpus is fully depleted.
Just like our SIP engine, we do not divide the annual interest rate by 12. Dividing a 12% annual rate to get a simple 1% monthly return inflates your compound projections. This calculator enforces geometric rate conversion to align with the actual NAV calculations used by asset management companies.
Cm = Cm-1 × (1 + i) − W
Where –
| Cm | Remaining corpus at the end of month m |
|---|---|
| Cm-1 | Corpus at the end of the previous month |
| i | Effective monthly return rate: (1 + annual return)^(1/12) − 1 |
| W | Fixed monthly withdrawal amount |
If the monthly withdrawal plus fees exceeds the capital growth and previous balance, the remaining corpus falls to zero.
Worked example: An SWP depletion scenario
Let's trace a ₹10,00,000 corpus with a ₹10,000 monthly withdrawal for 10 years at a 10% expected annual return. First, we convert the annual return to an effective monthly rate geometrically: i = (1.10)^(1/12) − 1 ≈ 0.7974%. In month one, your ₹10,00,000 earns interest of ₹7,974, bringing the balance to ₹10,07,974.
Next, your ₹10,000 withdrawal is deducted, leaving a remaining corpus of ₹9,97,974. In month two, this new balance earns interest of ₹7,958 and is then reduced by another ₹10,000 withdrawal, leaving ₹9,95,932. This process repeats every month for 120 months.
Over 10 years, you withdraw a total of ₹12,00,000 in monthly installments. Despite withdrawing more than your original principal, the remaining corpus grows to ₹10,91,332 because the compounding growth on the undistributed balance outpaces your withdrawals. This demonstrates how a controlled withdrawal rate preserves capital.
The Friction Section: Taxes, Loads, and Depletion Traps
An SWP calculator assumes a clean, steady withdrawal path. In the real world, several friction points can disrupt your cash flows.
First, consider the exit load. Many mutual funds charge a 1% exit load on units redeemed within 12 months of purchase. In an SWP, because you redeem units monthly, the withdrawals made during the first year of your investment will trigger exit load charges. Choose funds with zero exit loads or set up your SWP to start 12 months after your initial lumpsum deposit.
Second, consider capital gains tax. Each SWP withdrawal is treated as a redemption and is taxable. If you withdraw equity mutual fund units within 12 months, gains are taxed at 20% (STCG). After 12 months, gains are taxed at 12.5% (LTCG) on profits exceeding ₹1.25 Lakh per year. For debt funds, withdrawals are taxed at your marginal slab rate.
Third, beware of the depletion trap. If your withdrawal rate (e.g. 12% annually) exceeds the fund's actual return rate (e.g. 8% during a market correction), your corpus will shrink rapidly. Once your principal shrinks, it generates less compounding interest, accelerating your path to zero.
Our Take: Why Sequence of Returns is the Ultimate SWP Threat
In our experience, sequence of returns risk is the single greatest threat to a retirement SWP. If the stock market crashes in the early years of your retirement, you will be forced to redeem more mutual fund units to meet your fixed monthly withdrawal. This locks in paper losses and permanently reduces your principal, making it impossible for the portfolio to recover even if the market rebounds later.
We recommend keeping a safe withdrawal rate of 4% to 6% annually. Additionally, implement a bucket strategy: keep 3 years of expenses in a liquid debt fund for your immediate SWP payouts, and invest the rest in equity funds to grow. This shields your retirement paycheck from short-term equity market corrections.
How to use this SWP calculator
Enter your starting investment, monthly withdrawal amount, expected annual return (p.a.), and time period in years. Adjust sliders or values to see the remaining balance.
To plan how to build your initial investment corpus, use the SIP calculator. For one-time investment estimates without systematic withdrawals, use the lumpsum calculator.
Frequently asked questions
How is SWP different from mutual fund dividends?
Dividends are paid at the discretion of the fund house and vary based on profits. An SWP gives you full control, allowing you to withdraw a fixed amount of your choice on a specific date every month.
Can my SWP corpus run out completely?
Yes. If your monthly withdrawal rate plus fund management fees exceeds the compounding rate of the fund, your principal will shrink. If the market faces a prolonged downturn, the corpus will eventually fall to zero.
Is SWP tax-efficient compared to bank FD interest?
Yes. Bank FD interest is taxed fully every year at your income slab rate. In contrast, SWP withdrawals are only taxed on the capital gains component of the redeemed units (not the principal), which is generally lower.