GLOBAL WEALTH COMPOUNDING

Compound Interest & FIRE Nest Egg Calculator

Calculate the power of compound interest with recurring monthly contributions. Project long-term stock portfolio values and visualize your journey to Financial Independence.

Rule of 72

72 ÷ Return % = Years

Doubling Time Formula

Historical S&P 500

~10% Nominal

Average Annual Return

4% Safe Withdrawal

25x Annual Expense

FIRE Target Milestone

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Beginner Grant Offer

Claim 10,000 WLD and test this compounding portfolio risk-free!

No credit card required. Free simulated trading portfolio + daily central bank dividends.

Popular Compounding & FIRE Scenarios

8% APR

$500/Month for 20 Years at 8% Return

How investing $500 monthly into an S&P 500 index fund compounds over 20 years with historical average returns.

$500/mo • 20 yrs

10% APR

$1,000/Month for 30 Years at 10% (Become a 401k Millionaire)

Starting in your 20s or 30s with $1,000 monthly contributions can turn into over $2.2 million via long-term index compounding.

$1000/mo • 30 yrs

7% APR

$10,000 Lump Sum for 10 Years at 7% (No Additions)

Shows the Rule of 72 in action: a single $10,000 investment doubles in approximately 10 years at a 7% real compound rate.

$0/mo • 10 yrs

9% APR

$200/Month for 15 Years at 9% (College Fund / Starter)

Start small with just $200 per month to build a substantial $80,000 savings pool for children’s education or home down payment.

$200/mo • 15 yrs

9.5% APR

FIRE Number: How to Reach $1,000,000 in 15 Years

Calculate the monthly savings required to hit Financial Independence and Retire Early (FIRE) with $40,000 annual safe withdrawal.

$2500/mo • 15 yrs