ROI Calculator

How to use this calculator

This calculator has three modes: Standard ROI, Marketing ROI, and Real Estate ROI. Pick the one that fits your situation.

Standard ROI covers any investment where you put money in and get money back.

• Investment Cost is what you paid upfront. Include the full purchase price.
• Final Value is what the investment is worth now, or what you sold it for.
• Additional Costs (optional) covers ongoing fees, maintenance, taxes, or anything else you paid after the initial purchase. These reduce your ROI.
• Holding Period (optional, in years) enables the annualized ROI calculation. Without it, you only get total ROI.
• Inflation Rate (optional) converts your nominal ROI into a real ROI that accounts for purchasing power.

Marketing ROI mode focuses on ad campaign profitability:

• Ad Spend is your total spend on the campaign.
• Revenue Generated is the total revenue you can attribute to that campaign.
• COGS % is what percentage of that revenue went to the cost of goods. This is essential: using gross revenue without subtracting COGS dramatically overstates marketing returns.

Real Estate ROI mode handles rental properties:

• Purchase Price, Annual Rental Income, Annual Expenses (property tax, insurance, maintenance), Sale Price, and Years Held together give you both cash-on-cash return and total ROI including appreciation.

What ROI actually is

ROI measures how much you got back relative to what you put in. It’s intentionally broad: the same formula works for a stock trade, a marketing campaign, a rental property, or a piece of factory equipment.

ROI answers the question: "For every dollar I spent, how many dollars did I get back in profit?"

That flexibility is ROI’s biggest strength and its most common source of confusion. A 30% ROI means completely different things depending on whether it happened over one year or ten. It also means something different depending on what costs you decided to include. The formula is simple; applying it honestly is where people go wrong.

ROI is not the same as rate of return, though the two overlap. Rate of return is typically used in finance and investing contexts, often on an annualized basis. ROI is broader: it’s the preferred metric for business decisions, marketing analysis, and real estate, where “return” includes things like rental income, gross profit margins, and campaign-attributed revenue. This calculator handles all three contexts with the appropriate formulas for each.

The formulas and the calculations

Simple ROI:

Annualized ROI (CAGR):

Marketing ROI:

ROAS (Return on Ad Spend):

Real Estate Total ROI:

ROI vs. other return metrics: what makes ROI different

ROI is the broadest return metric. It’s designed to work across business contexts where other measures don’t apply cleanly.

Rate of return (or total return) typically assumes you put money into a financial asset and wait for it to grow. ROI generalizes this: you can include ongoing cash flows (like rental income), subtract operating costs, and apply it to non-financial assets like equipment or marketing spend.

Marketing ROI works the same way. If you spent $5,000 on ads and generated $20,000 in revenue with 60% COGS, your gross profit is $8,000. Marketing ROI = ($8,000 - $5,000) / $5,000 × 100 = 60%. If you’d used revenue instead of gross profit, you’d get ($20,000 - $5,000) / $5,000 = 300%, a number that looks great but tells you nothing about actual profitability.

ROI vs IRR: when simple ROI isn’t enough

Simple ROI handles single investments with a clear entry and exit point well. It struggles with two scenarios: uneven cash flows, and projects that generate income along the way.

If you invest $50,000 in a business and receive $10,000 in year 1, $20,000 in year 2, and $30,000 in year 3, what’s the ROI? The total cash received is $60,000 on a $50,000 investment, so total ROI is 20%. But the annualized ROI formula assumes the full $50,000 was tied up for all 3 years and returned as a single lump sum at the end. That’s not what happened. You got money back progressively, which means the later cash flows had shorter exposure periods.

For investments with uneven interim cash flows, use IRR (Internal Rate of Return) instead. IRR calculates the annualized return that makes the present value of all cash flows equal to zero, properly accounting for when each cash flow arrives.

Use simple ROI for one-shot decisions where the return arrives at the end. Use IRR for multi-period projects with varying cash flows. Use this ROI calculator’s annualized figure as a reasonable approximation when the cash flows are roughly even.

ROI benchmarks by context

“Good” ROI depends entirely on what you’re measuring and over what time period.

The stock market benchmark matters because it’s your opportunity cost. If a business investment returns 8% annualized and you could have just bought an index fund for 10%, the investment destroyed value even though it had a positive ROI.

Real-world examples

Example 1: E-commerce product line investment

A small business invests $30,000 to develop and launch a new product line: $20,000 in inventory, $5,000 in design and photography, $5,000 in initial paid ads. After 18 months, they’ve sold $65,000 in revenue. COGS on the product is 45%.

Example 2: Digital ad campaign

An online retailer runs a Google Shopping campaign for 30 days. Ad spend: $8,000. Attributed revenue: $42,000. Average gross margin: 35%.

Common mistakes

Ignoring time. A 100% total return sounds incredible. But if it took 20 years, that’s 3.5% annualized, which barely beats inflation. Always annualize when comparing investments of different durations.

Using revenue instead of gross profit in marketing ROI. This is the most common marketing math error. Revenue includes the cost of the product you sold. If your margins are 30%, then $100 in revenue is only $30 in gross profit. Calculating marketing ROI on revenue overstates your return by a factor of 3 or more.

Leaving out costs. For a business investment, the cost isn’t just the check you wrote on day one. It includes ongoing maintenance, management time (priced at opportunity cost), taxes, fees, and anything else that came out of your pocket. Undercount costs and your ROI looks better than it is.

Comparing different holding periods without annualizing. “This deal returned 60%, that one returned 40%, obviously pick the 60%” misses the point entirely if the first took 10 years and the second took 18 months.

Confusing nominal and real ROI. A 9% annualized return during a 4% inflation period is only a 5% real return. For long-term investments, the inflation adjustment matters.

Attributing all revenue to the campaign. In marketing ROI analysis, not every sale that happened during the campaign was caused by the campaign. Over-attribution inflates your marketing ROI and leads to over-spending on channels that aren’t actually driving results.

The bottom line

ROI is the most versatile return metric you have, but it’s only as accurate as the numbers you feed it. Always include all costs, always annualize when comparing across time periods, and always use gross profit (not revenue) in marketing analysis. A good ROI calculation tells you whether a decision actually made financial sense. A sloppy one just confirms what you wanted to hear.