ROI Calculator — Return on Investment & Annualized Return

ROI stands for Return on Investment. It is a percentage that expresses how much profit or loss an investment generated relative to its original cost. The formula is: ROI (%) = Net Profit ÷ Initial Investment × 100. A 35% ROI means you made 35 cents for every dollar invested after all costs. ROI is the universal language of investing because it normalizes scale — a $3,500 profit on a $10,000 trade has the same ROI as a $350,000 profit on a $1,000,000 property deal. Without ROI, absolute dollar figures obscure how efficiently your capital is working.

Annualized ROI (also called CAGR — Compound Annual Growth Rate) converts a total return over any time period into an equivalent annual rate. The formula is: Annualized ROI = (1 + ROI/100)^(365 / holding days) − 1, expressed as a percentage. For example, a 35% total gain held for 365 days gives 35% annualized. The same 35% gain held for only 180 days annualizes to approximately 77.6% — because if that pace continued, compounding would push the annual return much higher. Annualized ROI is the only fair way to compare investments held for different durations.

ROI (Return on Investment) assumes a single lump-sum investment at the start and a single exit at the end. It does not account for the timing of intermediate cash flows. IRR (Internal Rate of Return) is a more sophisticated metric that finds the discount rate at which the net present value of all cash flows (including periodic dividends, withdrawals, or additional contributions) equals zero. For simple buy-and-hold trades with no intermediate cash flows, ROI and IRR give identical results. For complex investments with multiple cash flow dates — such as rental property, a business project, or a bond with coupon payments — IRR is more accurate. This calculator approximates IRR by adding dividends to the final period, which is suitable for most trading and investment use cases.

The right benchmark depends on the asset class, time horizon, and risk profile. As reference points: the S&P 500 has historically returned approximately 7–10% annualized after inflation. Investment-grade bonds return roughly 3–5% annually. Real estate (excluding leverage) has averaged 4–8% annualized. For active stock traders and forex traders, a consistent 20–40% annualized ROI net of fees is considered strong. Crypto bull cycles have produced 3× to 10× returns, but with extreme volatility and drawdowns. The most useful benchmark is not a fixed number but whether your risk-adjusted return beats the best no-effort alternative available to you — typically a low-cost index fund.

Fees reduce ROI directly through two mechanisms: they reduce net profit (the numerator) and they increase the break-even threshold. On a $10,000 investment returning $13,500 with $50 in fees, the ROI drops from 35% to 34.5% — a small impact. But fees compound over time and across many trades. A trader making 100 round-trips per year paying $20 per trade loses $2,000 annually to commissions alone. That is equivalent to a 20% drag on a $10,000 account. High-frequency traders and leveraged crypto traders can lose the majority of their gross profit to fees. Always enter fees in the calculator to see their true impact, and use it to compare brokers or strategies by their net-of-fees ROI.