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Target Corpus Calculator

Work out target corpus instantly with clear inputs, formula shown and shareable results.

About Target Corpus Calculator

The corpus you need is the inflated annual expense divided by the rate you can safely withdraw. A 4% withdrawal rate implies 25 times expenses, and every point of inflation over a long horizon raises that requirement sharply.

Formula

Target corpus

Corpus = Expense × (1+inflation)^years / withdrawal rate

Worked example

With the default values below, Target Corpus Calculator returns Target Corpus Required of $48,107,032. Change any input above and every figure here is recalculated in your browser.

Inputs used

Annual Expense Todayminimum 0
600,000
Inflation Rateaccepts 0–100 %
6 %
Years Until You Need Itaccepts 1–50
20
Safe Withdrawal Rateaccepts 1–12 %
4 %

Results

Target Corpus Required
$48,107,032
Annual Expense At That Time
$1,924,281.28
Corpus As A Multiple Of Annual Expense
25.00
Corpus Needed If You Retired Today
$15,000,000

Step by step

  1. 1Values used
  2. 2Target corpus
  3. 3Target Corpus Required= 48,107,032
  4. 4Annual Expense At That Time= 1,924,281.28
  5. 5Corpus As A Multiple Of Annual Expense= 25.00
  6. 6Corpus Needed If You Retired Today= 15,000,000

Assumptions and limits

  • The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take tax into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Figures are estimates for planning only. Market returns are not guaranteed, and rates, limits and tax rules change. This is not financial or tax advice — speak to a qualified adviser before acting.
  • This is an estimate for general information and not professional financial, tax or legal advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Figures are estimates for planning only. Market returns are not guaranteed, and rates, limits and tax rules change. This is not financial or tax advice — speak to a qualified adviser before acting.

Frequently Asked Questions

Why divide by the withdrawal rate?

Because the corpus must fund spending indefinitely. The reciprocal of the safe rate is the multiple of expenses required.

Is 4% still appropriate?

It came from US historical data over 30 years. Longer retirements or lower expected returns argue for 3-3.5%.

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