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ROI

ROI (Return on Investment) is a percentage that measures profit relative to the cost of an investment. It answers 'how much did I make for every dollar I put in?'

Updated April 2026 · 4 min read
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Definition

ROI (Return on Investment) is a percentage that measures profit relative to the cost of an investment. It answers 'how much did I make for every dollar I put in?'

What it means

ROI is the most common shorthand for investment performance — in business, finance, real estate, and marketing. It's calculated as (Gain − Cost) / Cost, expressed as a percentage. A $10,000 investment that returns $13,000 has a 30% ROI; the same investment returning $9,000 has a −10% ROI. ROI is beloved because it's simple to calculate and easy to communicate, but it has blind spots: it ignores time, risk, and alternative uses of capital. A 30% ROI in one year is totally different from a 30% ROI over ten years, but the raw ROI number doesn't distinguish.

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Formula

ROI = (Net Gain / Cost) × 100%

Why it matters

ROI is useful for quick sanity checks — does this marketing campaign, software purchase, or business initiative pay back more than it costs? For longer-horizon decisions, prefer annualized ROI (CAGR) or NPV (net present value), which account for time. For comparing two investments of equal duration, ROI is perfectly fine.

Example

A $50,000 website redesign generates $85,000 of additional net revenue in its first year. ROI = ($85,000 − $50,000) / $50,000 × 100% = 70%. Same redesign, $95,000 of revenue over three years = 90% ROI total, but only ~24% annualized — a much less impressive picture.

Related free tools

Free toolROI CalculatorCalculate return on investment (ROI) as a percentage or dollar amount. Enter cost, return, and time period — done.Open tool →Free toolBreak-Even CalculatorFind how many units you need to sell to cover fixed and variable costs. Critical for new products and pricing decisions.Open tool →

Frequently asked questions

What counts as a good ROI?

Depends entirely on the asset class. Public stocks average ~7-10% annual ROI historically; real estate 8-12%; small-business investments can exceed 20%; Treasury bonds 3-5%. The right ROI is whichever beats your cost of capital.

What's ROI vs IRR?

ROI is a single-point percentage; IRR (Internal Rate of Return) is the annualized rate that accounts for when each cash flow hits. For multi-year investments, IRR is more accurate.

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