Finance & Investing

FIRE Number Calculator: How Much Corpus Do You Need to Retire Early?

Published July 4, 2026 · 6 min read · apps2help.com
Home › Blog › FIRE Number & Retirement Corpus

FIRE — Financial Independence, Retire Early — starts with one number: how much you need saved before your investments alone can cover your living expenses, indefinitely. Without a target number, "save more" has no finish line.

This guide explains how to estimate your retirement corpus from your monthly expenses, current age, target retirement age, and inflation.

Quick answer: Enter your monthly expenses, current age, retirement age and expected inflation into the free Apps2Help FIRE Calculator to get your estimated FIRE number instantly.

The Building Blocks of a FIRE Number

Your FIRE number depends on a handful of inputs, each of which meaningfully changes the final target.

💰

Monthly Expenses

Your baseline cost of living today.

🎂

Current & Target Age

How many years you have to build the corpus.

📈

Inflation Rate

How expenses grow between now and retirement.

🏦

Withdrawal Rate

The safe percentage you draw down each year.

Step-by-Step: Estimate Your FIRE Number

  1. Open the FIRE Calculator
  2. Enter your current monthly expenses
  3. Enter your current age and target retirement age
  4. Enter your expected annual inflation rate
  5. Click Calculate to see your estimated retirement corpus

Try the FIRE Calculator — Free

Plan your financial independence number privately, right in your browser.

Calculate My FIRE Number →

What Is a Safe Withdrawal Rate?

A safe withdrawal rate is the percentage of your retirement corpus you can draw down each year without running out of money over a long retirement. A commonly cited starting point is around 3-4% annually, though the right number for you depends on your investment mix, expected returns, and how long your retirement needs to last.

Building a Retirement Corpus in India

For an Indian investor, factoring in inflation is especially important, since prices for everyday expenses tend to rise faster in higher-inflation years. Running your numbers with a realistic inflation assumption, rather than today's expenses alone, gives a far more accurate picture of what you'll actually need by the time you retire.

Is This Calculator Financial Advice?

No. The FIRE Calculator is an informational planning tool that estimates a corpus based on the numbers you enter. It does not account for your specific investments, taxes, or risk tolerance, and is not a substitute for advice from a qualified financial professional.

Frequently Asked Questions

What is a FIRE number?+
Your FIRE number is the total corpus you'd need for your investments to sustainably cover your living expenses without relying on active income.
How does inflation affect my retirement corpus?+
Inflation increases your future expenses, so a higher inflation assumption results in a larger required corpus by your target retirement age.
What is a safe withdrawal rate?+
It's the percentage of your corpus you withdraw annually in retirement, commonly estimated around 3-4%, though this varies by individual circumstances.
Is my financial data stored anywhere?+
No, the calculation happens entirely in your browser and your inputs are not transmitted or stored.
Is this tool a substitute for financial advice?+
No, it's for informational purposes only. Consult a qualified financial professional for advice specific to your situation.

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