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How much do I need to retire, and am I on track?

Enter your current age, retirement age, life expectancy, current savings, monthly contribution, expected returns, inflation and the income you want in today’s money into AnyTool Retirement Calculator, and it instantly shows the corpus you are projected to have and the corpus you actually need — with a clear surplus or shortfall. The accumulation phase grows your savings and contributions at the pre-retirement return; your desired income is inflated to your first retirement year; and the corpus needed is sized either by a real-return drawdown that funds an inflation-growing income for your remaining years, or by the 4% rule (25× your first-year expense). When you are short, it solves the extra monthly saving that closes the gap, draws an accumulation chart and a drawdown projection, and flags if your money would run out early. Everything is calculated in your browser, so nothing is uploaded.

  • Projected corpus vs corpus needed → a clear surplus or shortfall
  • Desired income in today’s money, inflated to your first retirement year
  • Corpus sized by real-return drawdown or the 4% rule (25× expenses) — both shown
  • Solves the extra monthly saving needed to close a shortfall
  • 100% in your browser — no upload, no signup, works offline

What is

Retirement Corpus

A retirement corpus is the total pot of savings and investments you need at retirement to fund your living expenses for the rest of your life. It is sized from your desired annual income, the number of years it must last and the rates of return and inflation you expect. Two common methods size it: a real-return drawdown, which is the present value at retirement of an inflation-growing income paid out while the residual balance keeps earning a return; and the 4% rule, which sets the corpus at 25× the first-year annual expense (the inverse of a 4% safe withdrawal rate). Because returns, inflation and longevity are uncertain, any corpus figure is a planning estimate, not a guarantee.

Calculators

Related terms

4% ruleSafe withdrawal rateInflation adjustmentCompound growthDrawdown

Frequently Asked Questions

A quick estimate is 25 times your desired first-year annual expense — the 4% rule — but a real-return drawdown that allows for inflation and how long you will live is more precise.

There are two common ways to size a retirement corpus. The 4% rule says you need about 25 times your first-year annual spending — for example, $40,000 a year implies a $1,000,000 corpus — assuming you withdraw 4% in year one and adjust for inflation after. A more precise drawdown method inflates your desired income to your first retirement year, then takes the present value of that inflation-growing income stream over your remaining years while the unspent balance keeps earning a post-retirement return. AnyTool Retirement Calculator shows both numbers, compares them with the corpus you are projected to actually have, and tells you the surplus or the shortfall.

The 4% rule says you can withdraw 4% of your corpus in the first year and adjust it for inflation each year after, so the corpus you need is 25 times your first-year expense.

The 4% rule comes from a 1990s study suggesting a retiree could withdraw 4% of their portfolio in the first year of a roughly 30-year retirement, then increase that amount with inflation each year, with a low chance of running out. Reversed, it means your target corpus is 25 times your first-year annual spending (1 ÷ 0.04 = 25). It is a useful rule of thumb but assumes a diversified stock-and-bond portfolio and a fixed horizon; it can be too aggressive in poor markets or too cautious in good ones. AnyTool shows the 4% figure alongside an inflation-aware drawdown so you can compare them.

Enter your goal income and the calculator solves the monthly saving that grows your current savings to the corpus you need by your retirement age, on top of what you already save.

The monthly amount depends on how far you are from retirement, what you have saved already and your expected return. AnyTool Retirement Calculator works it out for you: it projects what your current savings and contribution will grow to, compares that with the corpus you need, and if there is a shortfall it solves — by a precise numerical search — the additional monthly saving that would close the gap by your retirement age. A common starting point is to save 10–15% of income, but the calculator gives you a figure tailored to your own goal and assumptions.

They are estimates only — returns, inflation and lifespan are uncertain — and this is not financial advice; everything is calculated in your browser, so nothing is uploaded.

A retirement projection is only as good as its assumptions, and you cannot know future investment returns, inflation or how long you will live — living longer than planned is the single biggest risk to a corpus. This calculator assumes a constant return before and after retirement and a constant inflation rate, and it ignores taxes, fees, pensions, Social Security and one-off costs like healthcare, so treat it as a planning illustration and review it regularly; it is not financial advice. AnyTool Retirement Calculator runs entirely in your browser, so your ages, savings and income goals are never sent to a server and the page works offline.

Detailed Explanation

Methodology

How the Retirement Calculator Works

AnyTool Retirement Calculator ties together the two halves of a retirement plan in the browser. In the accumulation phase it grows your current savings plus a monthly contribution at the expected pre-retirement return until your retirement age, using the same reusable, unit-tested investment engine as the SIP and compound-interest tools, and returns a year-by-year schedule and the projected corpus. To size the corpus you need, it inflates your desired annual income (entered in today’s money) to your first year of retirement, then values it two ways: a real-return drawdown that takes the present value at retirement of an inflation-growing income paid for (life expectancy − retirement age) years while the residual balance keeps earning the post-retirement return, and the 4% rule, which sets the corpus at 25× the first-year expense. The gap is projected minus needed — a surplus or a shortfall — and when short, the calculator solves the extra monthly saving that closes it by a monotonic numerical search. All arithmetic is pure client-side JavaScript.

  • Accumulation: current savings + monthly contribution compounded monthly at the pre-retirement return
  • Desired income entered in today’s money, then inflated to the first retirement year
  • Corpus needed = present value of an inflation-growing income (drawdown) OR 25× first-year expense (4% rule)
  • Gap = projected corpus − corpus needed → surplus or shortfall
  • Extra monthly saving to close a shortfall is solved by bisection on the accumulation engine
Use Cases

Corpus Gap, Charts and Year-by-Year Schedules

The result leads with the projected corpus, then a bold surplus or shortfall against the corpus needed, with both the drawdown and 4%-rule figures shown side by side and the active method highlighted. A pure-SVG accumulation chart stacks cumulative contributions and growth so compounding is visible without any chart library, and a separate drawdown chart traces the residual balance running down through retirement, flagging the age at which it would be exhausted if that comes before life expectancy. Two collapsible tables list the accumulation year by year (age, amount added, growth, corpus) and the drawdown year by year (age, withdrawal, growth, balance). A currency selector (₹ default, then $, € and £) controls display only; the engine is currency-agnostic.

  • Headline surplus / shortfall with corpus-needed shown for both methods
  • Pure-SVG accumulation chart: cumulative contributions and growth by age
  • Pure-SVG drawdown chart: residual balance over retirement, flags early depletion
  • Year-by-year accumulation and drawdown tables
  • Currency display in ₹ / $ / € / £ — display only, engine is currency-agnostic
Limitations

Assumptions Are Uncertain — Not Financial Advice

The calculator assumes a single constant return before retirement, a single constant return after retirement and a constant inflation rate, so it is an illustration of how a plan could play out rather than a forecast. Real investment returns vary year to year and can be negative, inflation drifts, and longevity is uncertain — outliving your corpus is the single biggest retirement risk, which is why the life-expectancy input matters. The figures are nominal at the assumed rates and ignore taxes, account fees, pensions, Social Security or other income, and one-off costs such as healthcare. The 4% rule is a rule of thumb from one historical US study and is not guaranteed in other markets or periods. The page states these limits plainly, recommends conservative assumptions and regular review, and is explicit that the output is not financial advice.

  • Assumes constant pre- and post-retirement returns and constant inflation
  • Longevity risk — outliving the corpus — is the biggest uncertainty
  • Ignores taxes, fees, pensions, Social Security and one-off costs
  • The 4% rule is a historical rule of thumb, not a guarantee
  • Output is a planning illustration, explicitly not financial advice
Privacy & Security

Privacy and Offline Use

Because all computation runs in the browser, your ages, current savings, contribution, expected returns, inflation and income goal are never sent to a server, there is no account or tracking, and the page works offline after first load. The currency selector only changes how numbers are displayed; the engine works in plain numbers. The Retirement Calculator is built on the same shared, unit-tested investment engine as the compound-interest and SIP tools, so its accumulation math is consistent across the calculator category.

Retirement calculator: in-browser (AnyTool) vs typical online calculators
CapabilityAnyToolTypical online calculators
ProcessingRuns in your browserOften server-side
Corpus neededDrawdown AND 4% rule, both shownUsually one method only
Inflation handlingIncome inflated to retirement, real-return drawdownOften nominal or hidden
Surplus / shortfallExplicit gap vs the corpus you needFrequently just a projection
Required savingSolves the extra monthly saving to close a shortfallOften missing
Drawdown projectionPure-SVG chart that flags early depletionRarely shown
Currencies₹ / $ / € / £ displayUsually one currency
Honest limitsStates return / inflation / longevity uncertainty; not adviceOften omitted
Cost / signupFree, no signup, works offlineOften ad-heavy or gated

AnyTool computes the corpus, gap, charts and schedules locally and uploads nothing.