SamCalculator

SWP Calculator

Calculate your Systematic Withdrawal Plan (SWP), estimate monthly retirement income, remaining investment value, and portfolio sustainability.

Investment Details

Currency:
$

Your lump-sum corpus at the start of the plan

%

Long-run portfolio return before inflation

per month
$

Amount withdrawn each period

How often you take money out

yrs

How long the plan runs

What Is a Systematic Withdrawal Plan (SWP)?

A Systematic Withdrawal Plan (SWP) is a strategy for turning a lump-sum investment into a regular, predictable income. Instead of selling your whole portfolio at once, you withdraw a fixed amount at set intervals — monthly, quarterly, half-yearly, or yearly — while the money that stays invested continues to earn returns. It is the mirror image of a SIP: a SIP builds wealth by investing regularly, while an SWP draws that wealth down in a controlled, sustainable way.

This SWP calculator runs a full period-by-period simulation of your plan. Pair it with our SIP calculator, retirement calculator, investment calculator, compound interest calculator, and inflation calculator to build a complete plan.

How SWP Works

Invest a lump sum

You start with a corpus — savings, a maturing investment, a retirement payout, or an inheritance — invested in a fund or portfolio expected to earn a return over time.

Withdraw on a schedule

On a fixed schedule, a set amount is redeemed and paid to you. The rest of the corpus stays invested and keeps compounding between withdrawals.

Growth offsets the drawdown

If your returns exceed your withdrawals, the corpus can keep growing. If withdrawals exceed growth, the balance gradually shrinks toward zero.

The balance evolves each period

Every period the corpus grows, then a withdrawal is subtracted. Repeat that across the plan and you get the full path of your remaining corpus and total income.

Four Ways to Use This SWP Calculator

1

Plan Retirement Income

Find out how much monthly income your corpus can safely support and how long that income will last across your retirement.

2

Test Sustainability

See whether your portfolio survives your full horizon or depletes early, and watch the remaining-corpus timeline year by year.

3

Account for Inflation & Tax

Add an annual withdrawal step-up, an inflation rate, and tax to see your real, after-tax income instead of just headline numbers.

4

Stress-Test Scenarios

Compare conservative, expected, and optimistic returns and run what-if changes to withdrawals, returns, and horizon side by side.

SWP vs SIP vs Dividend Plans

SWP vs SIP

A SIP (Systematic Investment Plan) puts money in at regular intervals to accumulate wealth; an SWP takes money out at regular intervals to generate income. SIP is the accumulation phase, SWP is the distribution phase. Many investors run a SIP for decades, then switch the same corpus into an SWP at retirement.

SWP vs Dividend Plans

Dividend (or income-distribution) plans pay out whatever the fund declares, which is irregular and not in your control. An SWP lets you choose exactly how much and how often you withdraw, regardless of distributions — giving you a steady, predictable paycheck from your investments.

SWP vs Lump-Sum Withdrawal

Pulling out the entire corpus at once exposes you to bad timing and removes future growth. An SWP keeps most of the money invested and growing while spreading withdrawals over time, which usually produces more total income.

SWP vs Fixed Deposits

A fixed deposit pays a guaranteed but typically lower rate and locks your money. An SWP from a balanced or equity portfolio targets higher long-term returns and full liquidity, at the cost of market risk and variable outcomes.

Benefits of an SWP & Who Should Use One

An SWP gives you a steady, self-directed income stream while keeping the bulk of your money invested and working. Because you choose the amount and the frequency, you stay in control of your cash flow — and because only part of the corpus is sold each period, the rest continues to compound. Done well, an SWP can deliver decades of income and still leave a meaningful balance behind.

SWPs suit retirees who need a regular paycheck from accumulated savings, near-retirees converting a maturing corpus into income, and anyone who wants predictable distributions without timing the market. They are most powerful when paired with a realistic return assumption, a sustainable withdrawal rate, and periodic reviews as markets and personal needs change.

Understanding Withdrawal Rates, Returns & Inflation

Your withdrawal rate — annual withdrawals divided by your starting corpus — is the single most important lever for sustainability. The widely-cited 4% guideline (from the Trinity Study) suggests that withdrawing about 4% of a balanced portfolio in year one, then adjusting for inflation, has historically lasted 30 years with high confidence. Higher rates generate more income now but raise the odds of running out.

Investment returns determine whether growth can keep up with your withdrawals. When your return comfortably exceeds your withdrawal rate, the corpus can grow indefinitely; when withdrawals outpace returns, depletion is only a matter of time. Because returns are uncertain, this calculator lets you stress-test conservative and optimistic cases side by side.

Inflation erodes the purchasing power of a fixed withdrawal. A $1,000 monthly withdrawal buys noticeably less after 20 years of rising prices, which is why the calculator reports real (today's-dollar) figures and offers an annual withdrawal step-up to help your income keep pace.

How SWP Is Calculated — the Core Formulas

Every result here comes from a period-by-period simulation, but it rests on a few simple formulas worth knowing.

Periodic Return

rₚ = (1 + Annual Return)^(1 / n) − 1

Converts the annual return into the rate earned each period, where n is withdrawals per year.

Balance Update

Closing = Opening × (1 + rₚ) − Withdrawal

Each period the corpus compounds, then the systematic withdrawal is subtracted.

Withdrawal Rate

Rate = (Withdrawal × n) ÷ Initial Corpus

First-year annual withdrawals as a share of your starting investment — the key sustainability gauge.

Taxation of SWP Withdrawals

How SWP withdrawals are taxed depends on the account and your jurisdiction. In a taxable investment account, only the gain portion of each withdrawal is usually taxed — the part that represents your original capital is returned tax-free. This calculator models that with a proportional (average-cost) method, applying your capital-gains rate only to the gain embedded in each redemption.

Withdrawals from pre-tax retirement accounts are often taxed as ordinary income on the full amount, which the income-tax field models. Either way, taxes are paid out of the cash you withdraw, so they reduce your net income rather than the corpus itself. Tax rules vary widely — confirm the treatment that applies to you with a qualified professional.

Common SWP Mistakes

  1. 1

    Withdrawing too much too soon

    A withdrawal rate well above 4–6% drains the corpus quickly, especially if markets disappoint early. Start conservative and increase only if your plan proves it can handle it.

  2. 2

    Ignoring inflation

    A fixed withdrawal feels comfortable today but loses purchasing power every year. Build in an annual step-up or plan for it explicitly so your real income holds up.

  3. 3

    Assuming returns that are too high

    Optimistic return assumptions make any plan look sustainable on paper. Use a conservative figure and treat extra returns as a bonus, not a foundation.

  4. 4

    Forgetting sequence-of-returns risk

    A market downturn in the first few years of withdrawals does far more damage than the same drop later, because you're selling more units at low prices. Keep a cash buffer for early downturns.

  5. 5

    Never reviewing the plan

    Markets, inflation, and your own needs change. Revisit your SWP at least once a year and adjust withdrawals so the plan stays on track.

Built for retirees, near-retirees, and anyone converting savings into sustainable income.

SWP methodology, the 4% withdrawal guideline, and compound-growth formulas are drawn from public references including the Trinity Study, the SEC's Investor.gov resources, and standard finance literature. See our methodology and editorial policy. Educational only — not financial advice.

Frequently Asked Questions

An SWP calculator estimates the outcomes of a Systematic Withdrawal Plan: how much income you can draw from a lump-sum investment, how your remaining corpus changes over time, and how long the money will last. You enter your initial investment, expected return, withdrawal amount and frequency, and duration, and it simulates the plan period by period to project your portfolio value, total withdrawals, investment growth, and sustainability.

You invest a lump sum and then withdraw a fixed amount at regular intervals — monthly, quarterly, half-yearly, or yearly. Between withdrawals the remaining corpus stays invested and earns returns. Each period the balance grows and then the withdrawal is subtracted. If returns exceed withdrawals the corpus can keep growing; if withdrawals exceed returns the balance gradually declines toward zero.

A common guideline is to keep first-year withdrawals around 4% of your corpus (the 4% rule from the Trinity Study), then adjust for inflation. Rates of 4–6% are often considered moderately sustainable depending on returns and time horizon, while rates above 6–7% materially raise the risk of depleting your corpus. Lower rates make the plan last longer and leave a larger balance behind.

Yes. If your withdrawals consistently exceed the growth your portfolio earns, the corpus will shrink and can eventually reach zero. This calculator shows your projected portfolio longevity — the approximate number of years before depletion — and flags whether your plan survives your full horizon or may run out early so you can adjust before it happens.

Inflation erodes the purchasing power of a fixed withdrawal — the same amount buys less every year. The calculator reports your remaining corpus and income in both nominal and real (today's-dollar) terms, and offers an annual withdrawal step-up so your income can rise over time to keep pace with rising prices.

It depends on your goals and risk tolerance. Fixed deposits offer guaranteed but typically lower returns with little market risk. An SWP from a balanced or equity portfolio targets higher long-term returns and full liquidity but carries market risk, so outcomes vary. Many people blend both — keeping near-term income needs in safe assets and drawing longer-term income from an SWP.

It depends on the account and your jurisdiction. In a taxable investment account, usually only the gain portion of each withdrawal is taxed, while the return of your original capital is not. Withdrawals from pre-tax retirement accounts are often taxed as ordinary income on the full amount. This calculator can apply a capital-gains rate to the gain portion or a flat income-tax rate to the whole withdrawal; confirm the exact treatment with a tax professional.

Yes. An SWP is flexible — most platforms let you increase, decrease, pause, or stop withdrawals whenever you like. Reviewing and adjusting your withdrawal amount periodically is good practice, especially after strong or weak market years, and the annual withdrawal-increase option here lets you model a planned step-up in advance.

It is an accurate model of standard SWP mathematics, but its output is only as good as your assumptions. It assumes a constant return, whereas real markets are volatile and the order of returns matters — especially early in a withdrawal plan. Treat the results as a well-grounded estimate and planning guide, run several scenarios, and revisit them as conditions change, rather than as a guarantee.

An SWP is one of the most popular ways to generate retirement income because it provides a predictable, self-directed paycheck while keeping the rest of your savings invested and growing. Its suitability depends on a sustainable withdrawal rate, a sensible return assumption, and an appropriate asset mix. Used carefully — and reviewed regularly — it can fund decades of retirement income.

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