Quick wins for a faster PC:
Repair Windows errors before they cause bigger problemsFix Now →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Return on investment (ROI) is a percentage that shows the gain or loss from an investment relative to the amount invested. For a basic investment, calculate it as ROI = (net gain or loss ÷ original investment) × 100. Include relevant income and costs, and state whether the result is before or after taxes.
How to calculate basic ROI
First define the investment amount, measurement period, income, and costs. A useful basic asset calculation is:
Net gain or loss = ending value − initial investment + income received − costs
ROI = net gain or loss ÷ initial investment × 100
#1 Best Overall
- Profitability calculations; cash flow function Calculates NPV and IRR for uneven cash flows
- Time-value-of-money and Amortization keys solve problems including: pension calculations, loans, mortgages, etc.
- Ideal calculator for students, managers and statisticians
- Built-in functionality : List-based one- and two-variable statistics with four regression options: linear, logarithmic, exponential and power
- The BA II Plus calculator is approved for use on the following professional exams: Chartered Financial Analyst exam. GARP Financial Risk Manager (FRM) exam. Certified Management Accountants exam
Income may include dividends, interest, rent, or distributions. Costs may include purchase commissions, advisory fees, fund expenses, and selling costs. FINRA advises investors to account for purchase cost, fees, income, and appreciation or depreciation when calculating investment returns (FINRA: Calculating Your Investment Returns). This basic calculation is before tax unless taxes are explicitly included; tax treatment varies by the type of income or gain, as the IRS explains (IRS: Capital Gains and Losses).
Worked example
Suppose you invest $1,000, receive $100 in dividends, sell the investment for $1,100, and pay $50 in total transaction costs.
- Calculate the gain before costs: $1,100 − $1,000 + $100 = $200.
- Subtract costs: $200 − $50 = $150 net gain.
- Divide by the initial investment and convert to a percentage: $150 ÷ $1,000 × 100 = 15% ROI.
This example is net of the stated costs but does not include taxes. If you leave out dividends or fees, the result will not reflect the same investment experience.
ROI and total return for investments
For stocks, bonds, funds, and similar assets, total return combines the change in market value with investment income such as dividends or interest. Price appreciation alone leaves out that income. FINRA describes total return as a more complete performance measure than price appreciation alone and notes that fees, commissions, and taxes can affect an investor’s result (FINRA: Understanding Investment Returns).
Free tools Windows power users keep installed
One-click scans. No signup required.
Rank #2
- Solves time-value-of-money calculations such as annuities, mortgages, leases, savings, and more
- Performs cash-flow analysis for up to 32 uneven cash flows with up to 4-digit frequencies
- Calculates various financial functions: Net Future Value Net present Value Modified Internal Rate of Return Internal Rate of Return Modified Duration Payback Discounted Payback
- The Texas Instruments BAII Plus Professional features an Automatic Power Down (APD) function for extended battery life
- Prompted display guides you through financial calculations showing current variable and label. Ten-digit display
A useful investment return percentage is [(ending value − beginning value) + income − costs] ÷ beginning value × 100. Compare results for similar holding periods and, where appropriate, against a relevant benchmark. A dollar gain alone cannot compare investments of different sizes.
Simple ROI versus annualized return
Simple ROI reports the total gain or loss over the period measured; it does not say how long it took to earn that result. A 20% return over six months is not equivalent to a 20% return over five years. For multi-year comparisons, annualized return converts the total return into an equivalent yearly rate while accounting for compounding.
Annualized return = (1 + total return)^(1 ÷ years) − 1
For example, a 25% total return over three years has an annualized return of approximately 7.72%, rather than 8.33% from simply dividing 25% by three. FINRA recommends annualized return for comparing investments held over different periods and explains that simple division does not account for compounding (FINRA: Calculating Your Investment Returns). Annualization conventions can vary; Investor.gov describes annual rate of return as profit or loss over a one-year period (Investor.gov: Annual Rate of Return).
Do these 3 things before closing this tab:
1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minuteWhen cash flows happen at different times
The basic ROI formula is less informative when money is added to or withdrawn from an investment at different times. List each cash flow and its date rather than treating all contributions as if they were made at the start. A time-weighted return can help evaluate portfolio-management performance; a money-weighted return or internal rate of return (IRR) reflects the timing and size of the investor’s cash flows.
IRR is the rate that makes the net present value of a series of cash flows equal to zero. For repeated calculations involving uneven cash flows, a financial calculator can be useful, but it is not necessary for a basic ROI percentage. The Texas Instruments BA II Plus supports cash-flow analysis, NPV, and IRR (Texas Instruments: BA II Plus).
ROI for businesses and projects
Businesses may use ROI to assess operating performance or a specific project, but the formula depends on the purpose and denominator chosen. A common managerial-accounting measure is ROI = operating income ÷ average operating assets. It can also be expressed as sales margin × asset turnover, where sales margin is operating income divided by sales and asset turnover is sales divided by average operating assets. This breakdown helps show whether performance reflects profitability per sale, asset use, or both. OpenStax discusses ROI in managerial accounting (OpenStax: Evaluate and Determine How to Make Decisions When Resources Are Constrained).
For a proposed project, focus on incremental benefits attributable to that project, not the company’s total revenue. Consider additional revenue and credible savings alongside incremental operating costs, maintenance, depreciation, and other relevant project costs. Make the denominator and measurement period clear, and compare the result with the company’s required return and other uses of capital.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Rank #4
- HP 10BII+ FOR STUDENTS & PROFESSIONALS – This HP calculator is built for business, finance, accounting, and statistics courses. Perfect for learners and professionals who need to solve common financial problems quickly without memorizing formulas or relying on spreadsheets.
- 100+ FUNCTIONS FOR REAL WORLD MATH – Quickly solve time value of money, interest rates, loan payments, NPV, IRR, cash flows, and more. The 10bII+ also includes probability distributions for statistics courses—a feature not often found in financial calculators.
- ALGORITHMIC INPUT WITH DEDICATED KEYS – This high-school/college calculator uses algebraic and chain logic with minimal keystrokes. Layout appears the same as standard calculators for easy learning. Dedicated keys give quick access to commonly used financial and statistical functions
- APPROVED FOR MAJOR EXAMS – The HP 10bII+ algebra calculator is permitted for use on SAT, PSAT/NMSQT, and AP tests. An ideal statistics calculator and business calculator for school finance and accounting students preparing for class, coursework, or standardized exams.
- INCLUDES TRAVEL CASE, CLEANING CLOTH & BATTERIES– Slim, durable, and easy to keep on hand or store in a backpack or locker. Includes a protective case, cleaning cloth, and batteries so it’s ready out of the box. Large screen with clear contrast (non-backlit) is easy to read during exams or lectures.
ROI compared with other measures
| Measure | What it tells you | Main limitation or use |
|---|---|---|
| ROI | Gain or loss relative to the amount invested. | Does not by itself account for timing, risk, or cash-flow pattern. |
| Annualized return | An equivalent yearly rate for a multi-period return. | Useful for comparing periods; conventions and cash-flow assumptions matter. |
| Payback period | How long it takes to recover the initial investment. | Basic payback generally ignores cash flows after recovery and the time value of money. |
| IRR | The rate that makes a series of cash flows’ NPV equal zero. | Useful for uneven cash flows, but can be difficult to interpret in some cases. |
| NPV | Value added in today’s dollars after discounting future cash flows at a chosen required return. | Depends on the discount rate and cash-flow estimates. |
| Accounting ROI or ARR | Return based on accounting income and an accounting investment base. | Does not necessarily use discounted cash flows; OpenStax notes accounting-rate-of-return methods do not account for time value of money. |
ROI is a relative-profitability measure, not a complete decision rule. NPV accounts for the timing of cash flows using a chosen discount rate; payback emphasizes recovery time; IRR considers a series of dated cash flows. Use the measure suited to the decision rather than treating these metrics as interchangeable.
Common ROI mistakes to avoid
- Leaving out income: Include dividends, interest, rent, or other relevant receipts, not just price changes.
- Ignoring fees: Say whether the figure is gross or net of commissions, advisory charges, fund expenses, and selling costs.
- Mislabeling a multi-year result: A total ROI is not an annual return. Annualize when comparing different holding periods.
- Mixing measures: Operating income, net income, cash flow, and after-tax cash flow are not interchangeable.
- Skipping risk and benchmark context: A higher return may reflect more risk, leverage, illiquidity, or a different time period. Investor.gov notes that investments can fluctuate and lose value; past performance does not guarantee future results (Investor.gov: Mutual Funds and ETFs).
- Treating a projection as a fact: Projected ROI depends on assumptions. Label the inputs, scenario, period, and uncertainty.
FAQ
What does a positive or negative ROI mean?
A positive ROI means the calculated gain exceeded the investment amount under the definitions used. A negative ROI means the calculated result was a loss. State what income and costs the calculation includes so the percentage is interpretable.
Does ROI include dividends and fees?
It should if you want a more complete investment result. Include dividends or other income and subtract relevant costs such as commissions and fund expenses. Label the result if it excludes fees or taxes.
Is ROI the same as annual return?
No. Simple ROI is the total result over the period measured. Annualized return expresses a multi-period result as an equivalent yearly rate and accounts for compounding.
Can ROI compare investments with different holding periods?
Not reliably by itself. Use annualized returns for comparable multi-period performance, and consider the timing of cash flows, risk, and an appropriate benchmark as well.
Is ROI financial advice?
No. ROI is a calculation, not a recommendation. This explanation is educational and is not individualized investment, tax, or accounting advice; consult a qualified professional about your circumstances.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
