Financial Independence Calculator

Calculate your FI number and years to financial independence at different savings rates.

By Konstantin Iakovlev · Updated April 2026 · Source: IRS

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FI Number (25x expenses)

$1,250,000.00

Years to FI

14.0

Current Progress

4.0%

Financial Independence Plan

Annual Expenses$50,000.00
FI Number (4% Rule)$1,250,000.00
Current Savings$50,000.00
Still Needed$1,200,000.00
Savings Rate50.0%
Annual Savings$50,000.00
Monthly Savings$4,166.67
Years to FI14.0

Years to FI at Different Savings Rates

10% savings rate ($833.33/mo)30.0 years
20% savings rate ($1,666.67/mo)23.0 years
30% savings rate ($2,500.00/mo)19.0 years
40% savings rate ($3,333.33/mo)16.0 years
50% savings rate ($4,166.67/mo)14.0 years
60% savings rate ($5,000.00/mo)13.0 years
70% savings rate ($5,833.33/mo)12.0 years

Use the Financial Independence Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.

Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.

How It Works

At the heart of early-retirement planning sits a single target: your 'FI Number', the sum that, once invested, can cover your living expenses indefinitely without a paycheck. This tool estimates that number from your current savings and the lifestyle you want to fund, then maps a path toward it that accounts for inflation and the market returns expected in 2026 and beyond.

The estimate leans on the 4% Rule, a widely used guideline holding that you can withdraw 4% of your portfolio each year without exhausting the principal. Your FI Number equals annual desired expenses divided by that safe withdrawal rate, so $50,000 of spending divided by 0.04 implies a $1,250,000 target. The projected years to reach it then flow from your current savings, your monthly savings rate, and an assumed 7% average annual return, a defensible long-run figure for a diversified portfolio given historical trends and the 2026 market outlook.

Every figure here is an estimate, and market swings or surprise expenses can stretch the timeline either way. People most often understate what their future life will cost, so it pays to be generous when you enter desired annual spending. Revisit both the FI Number and the savings plan from time to time, since life circumstances and the wider economy rarely stand still.

Example: Sarah's Path to FI

  1. 1 Sarah is 30 years old, has $50,000 saved, and wants to live on $60,000 per year in retirement. She currently saves $1,500 per month.
  2. 2 Using the 4% rule, her FI number is $60,000 / 0.04 = $1,500,000. With her current savings and monthly contributions, assuming a 7% annual return, the calculator projects her years to FI.
  3. 3 Sarah's FI Number: $1,500,000. Years to Financial Independence: Approximately 26 years.
  4. 4 This means Sarah could potentially retire at age 56. To accelerate this, she could increase her monthly savings or explore ways to boost her investment returns, perhaps through higher-risk but potentially higher-reward investment strategies, though this would also introduce more volatility.

Source: IRS · Last updated: April 2026

Frequently Asked Questions

How do I calculate my FI number?
Multiply your annual expenses by 25 (based on the 4% safe withdrawal rule). If you spend $50,000 per year, your FI number is $1.25 million. This is the portfolio size that can sustainably fund your lifestyle indefinitely in most historical scenarios.
What savings rate do I need to retire early?
At a 50% savings rate, you can reach FI in roughly 17 years. At 25%, it takes about 32 years. At 75%, just 7 years. The savings rate matters far more than investment returns because it simultaneously builds your portfolio and reduces the amount you need.
Is the 4% rule still valid in 2026? (detailed)
The 4% rule remains a reasonable starting point, though some researchers now suggest 3.5-3.7% for extra safety given current valuations and lower projected returns. Flexibility to reduce spending during downturns significantly improves success rates.

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