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What is an ROI Calculator?
Before putting money into a mutual fund, a friend's business, or a fixed deposit, most people want a single number that answers "was this worth it?" That number is Return on Investment, or ROI. This calculator compares what you put in against what you got back and expresses the gain — or loss — as a clean percentage, making it easy to compare very different investments, say an equity portfolio versus a small business, on the same scale.
ROI Formula
A positive ROI means your investment grew; a negative one means you got back less than you put in. The formula doesn't account for how long the money was invested, so a 35% ROI over one year is very different from the same 35% spread across five years — always keep the holding period in mind when comparing results.
Worked Example
Suppose you invested ₹1,00,000 in an equity mutual fund and, after some years, redeemed your units for a total of ₹1,35,000.
Your investment delivered a 35% overall return. If this happened over three years, that works out to roughly 10.5% annualised — a healthy showing for equity, though you'd still want to compare it against the category average and check whether long-term capital gains tax applies before deciding if it comfortably beat inflation.
How to Use This Calculator
- Enter the Amount Invested — your original capital or purchase cost.
- Enter the Total Returns — everything received back, including dividends or interim payouts.
- Click Calculate to see your ROI percentage instantly.
Once you know your ROI, the SIP Calculator can help you plan how much to invest monthly to build a similar corpus going forward.
Who Should Use This Calculator
This calculator is useful for anyone comparing returns across very different types of investments on a common scale — mutual fund investors checking a fund's overall gain, small business owners assessing whether a marketing spend or new equipment purchase paid off, real estate buyers calculating appreciation on a property sale, or individuals evaluating a friend's or family business investment. It works well as a quick sanity check before a bigger decision, such as comparing the ROI of two competing investment options side by side. Because plain ROI doesn't factor in the holding period, it's best paired with a time-based view (dividing by years invested) whenever you're comparing investments held for different durations, since a 30% ROI over one year is a very different outcome from the same 30% spread across five years.
Frequently Asked Questions
Q: Does ROI account for how long the money was invested?
A: No — a plain ROI percentage only measures total gain versus total invested amount, regardless of the time period. To compare investments held for different durations fairly, calculate an annualised (CAGR-style) return by adjusting for the number of years, since a 40% ROI over 2 years is much stronger than the same 40% over 8 years.
Q: How is ROI different from CAGR?
A: ROI gives you a single overall percentage gain or loss for the entire holding period, while CAGR (Compound Annual Growth Rate) expresses that same gain as a smoothed, annualised percentage, making it far easier to compare investments of different durations, such as a 3-year FD versus a 7-year equity SIP.
Q: Should I include dividends or interim payouts in my "Total Returns" figure?
A: Yes, for an accurate ROI, your Total Returns figure should include everything you received back — the final sale/redemption value plus any dividends, interest, or interim payouts received along the way. Leaving out interim cash flows will understate your actual ROI.
Q: What is considered a "good" ROI in India?
A: This varies heavily by asset class and time period — a fixed deposit might show 20-25% ROI over 3 years (roughly 7-8% annualised), while a well-performing equity mutual fund might show 60-80% ROI over the same period. There's no universal benchmark; always compare ROI against the specific asset class's typical historical range and against inflation.
Q: Does this ROI calculator account for taxes on my gains?
A: No, the ROI shown here is a pre-tax, gross figure. Actual take-home returns will be lower after accounting for applicable capital gains tax (LTCG/STCG for equities and mutual funds, or slab-rate tax for FD/RD interest), so factor in your specific tax treatment before comparing ROI figures across taxable and tax-exempt instruments.
More Worked Examples
Real estate scenario: An investor buys a plot for ₹30,00,000 and, including registration and brokerage of ₹2,00,000, has a total investment of ₹32,00,000. After 6 years, the plot sells for ₹52,00,000. ROI = [(52,00,000 − 32,00,000) ÷ 32,00,000] × 100 ≈ 62.5% ROI over the 6-year holding period, or roughly 8.4% annualised.
Small business scenario: A shop owner spends ₹1,50,000 setting up a new product counter and earns ₹45,000 in net additional profit from it in the first year. ROI = [45,000 ÷ 1,50,000] × 100 = 30% ROI in year one alone — a strong early indicator, though the true multi-year ROI would need to track profits over the full useful life of the investment.
Common Mistakes to Avoid With ROI
The most common mistake is comparing ROI figures from investments held for very different durations without adjusting for time — a 40% ROI over 1 year is dramatically better than a 40% ROI over 8 years, even though the headline number looks identical. Another frequent error is leaving out costs that should be part of the "Amount Invested" — brokerage, registration, renovation, or platform fees are often forgotten, which artificially inflates the calculated ROI. Investors also sometimes compare a pre-tax ROI on one instrument against a post-tax return on another; always check whether the ROI being compared is calculated on the same, consistent basis before drawing conclusions.
It's also worth remembering that ROI treats every rupee gained the same way regardless of when it arrived — a business investment that returned most of its profit in the final year is treated identically to one that paid out steadily from year one, even though the second scenario carries less risk in hindsight. For decisions involving multiple cash flows spread over time (like a business with recurring annual profits rather than a single exit), metrics like IRR (Internal Rate of Return) or NPV (Net Present Value) give a more complete picture than a simple ROI percentage, though ROI remains the fastest way to get a first read on whether an investment was worthwhile.
📅 Last reviewed: July 2026 · Formulas verified against RBI/SEBI/IT Dept guidelines.