Formula
Net gain = final value − initial investment − extra costs. ROI = (net gain ÷ initial investment) × 100. Annualised ROI estimate = ((final value − extra costs) ÷ initial investment)^(1 ÷ years held) − 1.
Finance
ROI Calculator
Calculate return on investment from amount invested, final value, extra costs and optional time held.
Calculator
Working calculator
Live result22.50% ROI225.00 net gain · annualised estimate 22.50% over 1.00 years
Formula used
Net gain = final value − initial investment − extra costs. ROI = (net gain ÷ initial investment) × 100. Annualised ROI estimate = ((final value − extra costs) ÷ initial investment)^(1 ÷ years held) − 1.
This is the method behind the answer, so the result can be checked rather than simply trusted.What-if check
Costs and final-value sensitivity
ROI changes when hidden costs are added or the exit value moves. These rows keep the denominator fixed so the comparison stays honest.
| Costs used | Net gain | ROI |
|---|---|---|
| 0.00 | 250.00 | 25.00% |
| 25.00 | 225.00 | 22.50% |
| 75.00 | 175.00 | 17.50% |
| Final value | Net gain | ROI |
|---|---|---|
| 1,125.00 | 100.00 | 10.00% |
| 1,250.00 | 225.00 | 22.50% |
| 1,375.00 | 350.00 | 35.00% |
Visual proof
Investment versus net result
Net end value is 1,225.00. Net gain is 225.00, giving 22.50% ROI and an annualised estimate of 22.50% over 1.00 years.
Printable calculation report
Result: 22.50% ROI. Assumption: Initial investment is the denominator for the ROI percentage.
- Initial investment
- 1000
- Final value or proceeds
- 1250
- Fees and extra costs
- 25
- Years held
- 1
- Page/date context
- 2026-05-16 UTC page version
- Page URL
- https://calculationtime.com/calculators/roi-calculator
Worked example
Initial investment 1,000 and final value 1,250 gives a gross gain of 250. Subtract 25 of fees and costs to get a net gain of 225. ROI = 225 ÷ 1,000 × 100 = 22.5%. Over one year, the annualised estimate is also 22.5%.
Professional note
Master’s Tip: keep cash profit and ROI percentage side by side. A small project can show a high ROI but still produce little cash, while a larger investment can show a lower ROI and still return more money.
Regional and unit assumptions
Standard or basis: transparent return-on-investment arithmetic using initial investment as the denominator. No tax, accounting, securities, property or lending standard is claimed.
Assumptions and limitations
- Initial investment is the denominator for the ROI percentage.
- Extra costs reduce the net gain before ROI is calculated.
- The annualised estimate assumes one start value, one end value and a constant compound rate across the entered holding period.
- Taxes, inflation, risk, timing of cash flows, dividends and reinvestment rules are not included unless they are already reflected in the entered values.
- This is arithmetic for comparison and reporting, not financial advice.
Methodology & Accuracy
How this calculator is checked
CalculationTime pages are built around visible arithmetic: the formula, assumptions, worked example and practical limitations are shown so the result can be checked rather than simply trusted.
Formula used
Net gain = final value − initial investment − extra costs. ROI = (net gain ÷ initial investment) × 100. Annualised ROI estimate = ((final value − extra costs) ÷ initial investment)^(1 ÷ years held) − 1.
Standard or basis
Standard or basis: transparent return-on-investment arithmetic using initial investment as the denominator. No tax, accounting, securities, property or lending standard is claimed.
Where a calculator follows a named legal, trade or industry standard, that standard is cited visibly. Otherwise the page uses transparent general arithmetic and states its limits.Master's Tip
Master’s Tip: keep cash profit and ROI percentage side by side. A small project can show a high ROI but still produce little cash, while a larger investment can show a lower ROI and still return more money.
Related calculators
Questions
How do you calculate ROI?
Subtract the initial investment and direct costs from the final value, divide the net gain by the initial investment, then multiply by 100.
What is a 22.5% ROI?
A 22.5% ROI means the net gain is 22.5% of the initial amount invested. For a 1,000 investment, that is 225 of net gain.
Should fees be included in ROI?
Yes, if the fees are directly tied to the investment or project. Including them gives a more honest net return than using sale value alone.
Is ROI the same as profit?
No. Profit is the money gained. ROI expresses that gain as a percentage of the initial investment.
Does this ROI calculator include tax or risk?
No. It is a transparent arithmetic calculator. Tax, inflation, risk, timing of cash flows and professional advice may change the real decision.
Calculation note
ROI is a compact way to compare gain with money committed. It is useful for business projects, marketing spend, resale decisions and finance examples, but the percentage should not be read without the cash amount, costs, time period and risk context.
ROI starts with the denominator
Return on investment uses the initial investment as the baseline. That makes unlike projects easier to compare, but it also means a small denominator can produce a dramatic percentage from a modest cash gain.
Costs change the story
A sale price or final value is not the same as return. Brokerage, platform fees, delivery, materials and other direct costs reduce the gain before the return percentage is calculated. The printable report keeps those costs visible.
Time and risk are separate checks
A 20% result over one month and a 20% result over five years are not equivalent. Annualising helps compare time periods, but it still does not measure risk, tax, inflation, liquidity or whether the cash flows arrived evenly.
Sources and further readingInvestor.gov: Compound Interest CalculatorHarvard Business School Online: Return on Investment