ROI Calculator
Measure return on investment with annualization, inflation adjustment, and side-by-side comparison across multiple assets.
Interactive ROI Calculator
Result
Use this free ROI calculator to measure return on investment for any asset — stocks, real estate, business projects, marketing campaigns, or home improvements. Returns simple ROI, annualized return, and inflation-adjusted figures for accurate comparison.
How to use this ROI calculator
Enter the initial investment, the current or final value, and the holding period in years. The calculator returns total dollar gain, simple ROI, and annualized return (CAGR). Open the advanced settings to add contributions, income received, fees, and inflation.
Worked example: $10,000 stock investment over 5 years
You bought $10,000 of an index fund. After 5 years, the position is worth $16,500 and you received $1,200 in dividends.
- Total return: $7,700 (the gain plus dividends)
- Simple ROI: 77%
- Annualized return (CAGR): 12.1% — comparable to long-term stock market averages
- With 3% inflation: 9.1% real annual return
That 77% looks impressive until you annualize it. The same 77% over 30 years would be a 1.86% annual return — barely above inflation.
Worked example: rental property
A rental property purchase:
- Down payment: $40,000
- Closing costs: $5,000
- Total cash invested: $45,000
- Annual cash flow (rent minus expenses): $4,200
- Annual mortgage paydown (equity build): $3,800
- Property appreciation per year: $6,000
Total annual return: $14,000 on $45,000 invested = 31% total return or ~12% when annualized for typical leverage. Cash-on-cash return alone is $4,200 / $45,000 = 9.3%.
The time-horizon trap
A friend brags about a 50% return on a 2-year investment. Another friend quietly earned 12% per year for 10 years. Which performed better?
- 50% over 2 years = ~22.5% annualized
- 12% over 10 years = 12% annualized
The first investment, despite the higher headline number, was actually 1.9x better annualized. Without the time-horizon adjustment, the comparison is meaningless. The calculator’s annualized return mode prevents this confusion.
Inflation’s quiet cost
A 10% nominal return with 3% inflation is a 7% real return. Over 30 years:
- $10,000 at 10% nominal: $174,494
- $10,000 at 7% real: $76,123 in today’s dollars
The headline 10% suggests your money grew 17x. In purchasing power, it grew 7.6x. The calculator’s inflation-adjusted output makes this gap explicit.
Tips for accurate ROI measurement
- Include fees. A 1% annual fee on a $100,000 portfolio costs $1,000/year, which compounds to six figures over 30 years. Always subtract fees before calculating ROI.
- Include taxes for taxable accounts. Capital gains, dividend, and income taxes reduce effective return. For tax-advantaged accounts, gross return is the right number.
- Annualize for comparison. Simple ROI is misleading across different holding periods. Always look at CAGR when comparing investments.
- Adjust for risk. A 20% annualized return with huge volatility is not equivalent to a steady 12%. Risk-adjusted return (Sharpe ratio) is the next layer of analysis beyond raw ROI.
- Account for cash flow timing. IRR captures the timing of intermediate cash flows; ROI does not. For investments with irregular income, IRR is more accurate.
Common pitfalls
- Cherry-picking start and end dates. ROI is sensitive to the dates chosen. A 5-year return that includes a recent bull market looks great; the 10-year return is more representative.
- Ignoring opportunity cost. Capital tied up in one investment cannot be in another. ROI above a risk-free benchmark is the right comparison; absolute ROI ignores what you could have earned.
- Survivorship bias in benchmarks. Past S&P 500 returns exclude companies that failed. Real future returns may be lower.
- Confusing gross and net of fees. A fund reporting 12% gross with 2% in fees delivered 10% net to investors.
Related Tools
- Compound Interest Calculator – Project investment growth with contributions and inflation adjustment.
- Mortgage Calculator – Estimate monthly mortgage payments including taxes and insurance.
- Percentage Calculator – Quick percentage math for percentage change and growth.
- Inflation Calculator – Convert historical dollars to today’s purchasing power.
- Loan Calculator – Calculate monthly payments for any fixed-rate loan.
| Category | Typical ROI | Time horizon | Notes |
|---|---|---|---|
| S&P 500 (long-term) | ~10% annualized | 10+ years | Nominal, before inflation |
| Rental property | 8-15% total return | 5-10 years | Includes appreciation + cash flow |
| Kitchen remodel | 60-80% at resale | At sale | Higher in mid-range homes |
| Bathroom remodel | 50-70% at resale | At sale | Mid-range projects return more |
| Marketing campaign | 5:1 ROAS is good | Campaign duration | Highly industry dependent |
| Solar installation | 4-7 years payback | 10-25 years | Then 15+ years of net positive |
Compare your options
Two methods, three minutes. The honest trade-off table.
This ROI calculator
- + Annualized return and CAGR support.
- + Inflation adjustment shows real vs. nominal return.
- + Side-by-side comparison of multiple investments.
- − Does not model variable cash flows mid-period.
Personal Capital / Empower
- + Automatic portfolio tracking and ROI analysis.
- + Asset allocation and fee analysis built in.
- − Requires linking all investment accounts.
- − Upsells to wealth management services.
Excel spreadsheet
- + Maximum flexibility for unusual cash flow patterns.
- + Can model IRR and NPV with full precision.
- − Manual upkeep and formula complexity.
- − Not practical for quick comparisons.
Who actually uses ROI Calculator?
Five concrete situations pulled from real sessions, with the exact inputs people paste in.
Compare two investments with different time horizons and contribution patterns.
Enter each holding's purchase price, current value, dividends received, and holding period. The tool returns simple ROI, annualized return, and total dollar gain — comparable across assets regardless of duration.
Cash-on-cash return and total ROI on a rental.
Enter down payment, closing costs, monthly rent, expenses, and current value. The tool returns cash flow, cash-on-cash return, and total return including appreciation.
Quantify the return on ad spend.
Enter the campaign cost and the revenue it generated. The tool returns ROI percentage, return on ad spend (ROAS), and the break-even point.
Estimate the ROI timeline for a capital expenditure.
Enter the equipment cost, expected monthly revenue lift, and operating costs. The tool returns monthly net benefit, payback period in months, and 5-year ROI.
Estimate ROI for renovations at resale.
Enter renovation cost and the expected value add at sale. The tool returns the percentage return and the break-even holding period if the work improves daily life instead.
An ROI calculator that supports the comparisons you actually make
Most ROI tools handle one investment at a time and ignore time horizon, inflation, and cash flow timing. This tool handles all three — and lets you compare multiple investments side by side. Whether you are evaluating a stock, a rental property, a marketing campaign, or a renovation, the calculator returns comparable figures that reflect the actual time value of money.
Annualized return, not just total
A 50% return over 3 years is 14.5% annualized. The calculator returns both, so you can compare a 3-year investment against a 10-year one without being misled by the duration.
Real return in today's dollars
Toggle inflation to see real purchasing power change. Without this, multi-decade returns overstate wealth accumulation by 2-3x.
Side-by-side comparison
Add two or more investments and the tool returns a comparison table showing which delivered better annualized return after fees and inflation.
Stocks, real estate, business, marketing
The same formula handles vastly different investments. Whether the inputs are share prices and dividends or down payment and rent, the output is comparable ROI.
What you only get here: an ROI calculator with annualization, inflation adjustment, and multi-investment comparison — without an account, without linking your brokerage, and without ads.