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Advanced Two-Way SWP Calculator

SWP Calculator: How Long Could Your Corpus Last—or How Much Could You Need?

The FinEdge SWP Calculator works in both directions. Start with the corpus you have and estimate how long scheduled monthly withdrawals could continue, or start with the monthly amount you need and estimate the corpus mathematically required for a chosen withdrawal period. Every calculation is placed alongside a lower and a higher return assumption.

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Two ways to use the SWP Calculator

Choose the direction that matches your question. The calculator then asks one question at a time and shows the answer across a lower, your selected and a higher return assumption.

More than a standard SWP calculator

Most SWP calculations begin with a corpus and a monthly withdrawal. The FinEdge SWP Calculator works in both directions.

Start with the corpus you have to estimate how long scheduled withdrawals could continue across different return assumptions. Or start with the monthly amount you need and calculate the corpus mathematically required for a chosen withdrawal period across return scenarios.

You can also model withdrawals that increase every year and compare lower, selected and higher return assumptions to see how materially the result can change.

Why return assumptions change the answer

A withdrawal calculation is sensitive to the return assumed on the remaining corpus. Instead of showing only one number, the calculator places your selected assumption alongside a lower and higher return scenario so you can see how the mathematics changes.

These are illustrations, not forecasts. Actual investment returns do not arrive at a constant rate.

How the calculation works

  • Withdrawals are taken at the beginning of each month; the remaining corpus then earns the assumed return for that month.
  • The annual return you enter is converted into an effective monthly return, so twelve months compound back to the annual figure you selected.
  • When an annual withdrawal increase is selected, the first increase applies only after 12 completed withdrawals, and after each subsequent set of 12.
  • In Forward mode, a month counts only when the full scheduled withdrawal can be met. Modelling stops at the first withdrawal that cannot be met in full and is capped at 60 years.
  • In Reverse mode, the required corpus is the present value of the complete scheduled withdrawal series, ending at a zero balance.

What this calculation does not tell you

The calculator shows the mathematics of a withdrawal schedule. It does not establish that a withdrawal is suitable or sustainable in real markets. Actual outcomes can differ because returns vary over time and because taxation, investment costs, portfolio structure and future changes in withdrawals can affect the result.

What should you do with this number?

An SWP calculation can show you the mathematics of a withdrawal schedule. The next question is how that number fits into your retirement requirement, your existing portfolio and the way future investment decisions will be made.

  • Planning for retirement?

    A monthly withdrawal is only one part of retirement planning. Your retirement requirement also depends on the income you need, the resources already available, how long the money may need to support you and how the remaining corpus is structured over time.

    Explore Retirement Planning

  • Will your existing portfolio support the withdrawals?

    The calculation does not tell you whether your current investments are appropriately structured for the withdrawals, your liquidity needs, the risk required by your goals or the other objectives the portfolio still needs to support.

    Get Your Portfolio Reviewed

  • The maths is only one part of the decision

    FinEdge's bionic model combines a dedicated Investment Manager with structured process, proprietary technology and AI-enabled systems to bring context, continuity and human judgement to investment decisions.

    Explore FinEdge's Bionic Model

SWP Calculator: frequently asked questions

Where to go next

FinEdge is an AMFI-registered Mutual Fund & SIF Distributor (ARN 83676). This calculator is a mathematical decision-support tool, not investment advice or a recommendation of any scheme. Mutual fund investments are subject to market risks; read all scheme related documents carefully.