Written in HTML by Grok (Jiwt-approved) • Proof of Accuracy
This tool uses the industry-standard compounding formula — the exact same one powering calculators at Vanguard, Fidelity, Schwab, and beyond.
New Balance = (Previous Balance + This Year's Contribution) × (1 + Return Rate)
All historical returns shown are real, verified compound annual growth rates from sources like NYU Stern, Morningstar, Bloomberg, and CGC/PSA auction data (for collectibles).
The Year-by-Year Breakdown and chart assume your chosen return occurs every single year for illustration only. Real returns fluctuate wildly — but the long-term average is what builds empires.