π ROI Calculator
Total return on investment plus the annualized rate for fair comparisons.
Return on Investment
Estimates for planning only, not financial advice.
What Is ROI, Really?
Return on investment measures profit relative to cost: ROI = (gain - cost) / cost x 100. Invest $10,000, get back $14,000, and your ROI is 40 percent. But that 40 percent is meaningless without a clock. Earned over 3 years it is 11.87 percent a year, a strong return. Earned over 10 years it is 3.42 percent a year, worse than a savings account. The calculator above gives you both the total ROI and the annualized ROI, and the annualized number is the one you should use for every comparison you ever make.
How to Use This Calculator
Enter what you put in, what you got back, any extra income the investment paid along the way, and how long you held it. The calculator returns the total ROI, the net profit in dollars, and the annualized ROI, which is the number to use when comparing investments with different holding periods.
Enter the Amount Invested: the full cost basis, including purchase price plus any fees or commissions you paid to get in.
Enter the Amount Returned: the sale proceeds or current value, net of any selling costs. Add dividends, interest, or rental income in the Extra Income field.
Enter the Years Held, using decimals for partial years (6 months = 0.5). The annualized ROI needs this to convert the total gain into a yearly rate.
Compare the annualized ROI against your alternatives: the stock market's long-term average, your mortgage rate, or a safe savings APY at similar risk.
The ROI Formulas
Total ROI is simple division: profit over cost. Annualized ROI is the compound annual growth rate (CAGR) of the investment: the constant yearly rate that would grow the invested amount into the final amount over the holding period. The exponent 1/years is what spreads the gain evenly across time. Note that annualization assumes the gain compounded smoothly, which is a modeling convenience, not a claim about how the returns actually arrived.
There is a handy reverse formula too. If you want a specific ROI, the final value you need is: required final value = investment x (1 + desired ROI / 100). Want a 50 percent total ROI on $10,000? You need to walk away with $15,000. It sounds obvious written out, but writing the target down before you invest is what separates a plan from a wish.
Worked Example
Invest $10,000, sell three years later for $14,000, with no extra income. Net profit = $14,000 - $10,000 = $4,000. ROI = $4,000 / $10,000 = 40 percent. Annualized ROI = 1.40^(1/3) - 1 = 11.87 percent per year. Now add $900 of dividends over the three years: profit becomes $4,900, ROI becomes 49 percent, and annualized ROI becomes 1.49^(1/3) - 1 = 14.22 percent. The dividends added 9 points of total ROI but only about 2.4 points annualized, which shows why the annualized figure is the honest one for comparing against, say, a 7 percent market return.
The Same 40 Percent at Different Speeds
A 40 percent total ROI sounds identical in every pitch deck. Annualized, it tells four different stories:
| Holding period | Total ROI | Annualized ROI |
|---|---|---|
| 1 year | 40% | 40.00% |
| 3 years | 40% | 11.87% |
| 5 years | 40% | 6.96% |
| 10 years | 40% | 3.42% |
The 1-year version doubles your money roughly every 2 years if repeated. The 10-year version barely beats inflation. This is my pet peeve with investment marketing: anyone can quote a big total return by stretching the holding period long enough. Always ask "per year," and if the answer is vague, run the numbers yourself. The annualized column is the only one that lets you compare a stock, a rental property, and a business project on equal footing.
ROI vs ROAS: Do Not Mix Them Up
In marketing you will hear ROAS, return on ad spend, which is simply revenue divided by ad spend. Spend $1,000 on ads, generate $5,000 in revenue, and your ROAS is 5x. ROI is stricter: (revenue minus ALL costs, including the ad spend, staff, and tools) divided by the cost. That same campaign might have a 400 percent ROAS-style headline but a much lower true ROI once every cost is in the denominator. ROAS tells you whether the ads work. ROI tells you whether the business works. When someone quotes you a marketing ROI, ask which costs they left out, because the answer is usually "several."
Nominal vs Real ROI
ROI in nominal dollars can flatter an investment during inflationary years. The real return, what your purchasing power actually gained, is (1 + nominal) / (1 + inflation) - 1. A 10 percent nominal ROI with 3 percent inflation is really 6.80 percent. For multi-year investments this distinction matters more than most people think: a 40 percent total ROI over 10 years at 3 percent annual inflation is barely positive in real terms. If you are comparing investments across different eras, always convert to real returns first.
Using ROI in Real Decisions
Business owners use ROI to rank projects: a marketing campaign, new equipment, or a hire each get an expected ROI, and capital goes to the highest risk-adjusted number. Real estate investors compute ROI on the down payment (cash-on-cash return) rather than the purchase price, because borrowing against the property magnifies it. Just remember the formula's blind spots: it says nothing about risk, nothing about when the cash arrived, and everything about which costs you remembered to include. Put every cost in the denominator, including your time if it was significant, or the ROI will flatter the investment.
Related Tools
Go deeper: our IRR calculator handles uneven cash flows that ROI cannot, the payback period calculator tells you how fast you get your money back, the average return calculator smooths bumpy yearly returns, and the mutual fund calculator models fee drag on fund returns.
Estimates for planning only, not financial advice.
Frequently Asked Questions
What is ROI?
Return on investment measures profit relative to cost: ROI = (gain - cost) / cost x 100. Invest $10,000, get back $14,000, and your ROI is 40 percent. It is the universal yardstick for comparing investments of different sizes, because a $4,000 profit means something very different on a $10,000 investment than on a $1 million one.
What is the difference between ROI and annualized ROI?
Total ROI ignores time, so 40 percent over 3 years and 40 percent over 10 years look identical. Annualized ROI converts the gain into an equivalent yearly compound rate, which makes different holding periods comparable. The 3-year investment annualizes to 11.87 percent per year, while the 10-year one annualizes to just 3.42 percent. Always annualize before comparing.
What is a good ROI?
It depends on the risk. A 7 to 10 percent annualized ROI is the long-term historical range of the US stock market, so beating that consistently is genuinely hard. A savings account at 4 percent is a good ROI for zero-risk money. For a small business project, many owners want 15 to 20 percent annualized to justify the risk and effort. Compare against what the money would earn elsewhere at similar risk.
Should dividends or rental income count in ROI?
Yes, absolutely. Total return includes every dollar the investment pays you plus the change in its value. A stock that rose 5 percent but paid a 3 percent dividend earned an 8 percent total return. Enter that extra income in the additional income field so the calculator measures the complete picture, not just the price change.
What are the limits of ROI?
ROI ignores when cash flows happen within the holding period, ignores risk entirely, and can be gamed by leaving costs out of the denominator. Two investments with the same ROI can have very different risk profiles and very different timing. For projects with uneven cash flows across years, IRR is the better tool because it accounts for timing explicitly.
Can ROI be negative?
Yes, and it often is. Lose money and the formula gives a negative percentage: invest $10,000, get back $8,000, and ROI is -20 percent. Annualized ROI handles losses the same way, as long as the final value is positive. If you lose everything, ROI is -100 percent and annualization is meaningless, because no positive rate compounds to zero.
What is the difference between ROI and ROAS?
ROAS (return on ad spend) is revenue divided by ad spend: spend $1,000 on ads, earn $5,000 in revenue, and ROAS is 5x. ROI is stricter: (revenue minus all costs, including the ad spend, staff, and tools) divided by the cost. ROAS tells you whether the ads work; ROI tells you whether the whole undertaking is profitable. Never compare one person's ROAS with another person's ROI.
How do fees and expenses change ROI?
Fees shrink ROI twice: they reduce the final value directly, and recurring fees reduce the amount that keeps compounding year after year. A 1 percent annual fee on an investment earning 7 percent does not just cost 1 percent of the gain; over 30 years it can erase roughly a quarter of the final balance. Always compute ROI on the after-fee numbers, using the actual dollars that land in your account.
Nominal vs real ROI: how does inflation change the answer?
Nominal ROI uses current dollars; real ROI adjusts for inflation. The conversion is (1 + nominal) / (1 + inflation) - 1. A 10 percent nominal ROI with 3 percent inflation is really 6.80 percent. Over long holding periods the gap compounds: a 40 percent total ROI across 10 years of 3 percent inflation is barely positive in real terms. Compare investments across different eras in real terms only.
What final value do I need for a target ROI?
Multiply your investment by one plus the desired ROI as a decimal: required final value = investment x (1 + desired ROI / 100). Want a 50 percent total ROI on $10,000? You need to walk away with $15,000. The formula sets the target; it says nothing about the probability of hitting it, which is where risk analysis and honest assumptions come in.
Break-even vs ROI: what is the difference?
They answer different questions. Break-even asks what revenue or volume covers your costs, the point where profit is zero. ROI asks how much net gain you made relative to what you invested. A project can break even quickly but deliver a weak ROI, or break even slowly and still be an excellent investment. Use break-even for survival planning and ROI for comparing where capital earns the most.
Is ROI the same as profit?
No, and mixing them up causes real confusion. Profit is a dollar amount: you made $4,000. ROI is that profit scaled by what you spent to earn it: $4,000 on a $10,000 investment is a 40 percent ROI, but $4,000 on a $1 million investment is 0.4 percent. Profit tells you what happened; ROI tells you how efficiently your money worked.