ROI Calculator

Enter your initial investment (the upfront cash you put in) and the final value (what the investment is now worth, or what it returned). Add the time period in years — fractions are fine, so use 0.5 for six months or 2.5 for thirty months.

If your investment has ongoing costs over its lifetime (maintenance on a property, software subscriptions for a business tool, fees on a portfolio), enter the total ongoing costs across the entire period. This reduces your net profit and gives a more accurate ROI.

The simple ROI tells you the total percentage return regardless of time period. The annualized ROI is the equivalent compound annual growth rate — the apples-to-apples number you should use to compare investments of different durations.

For business decisions, this calculator handles common scenarios: equipment purchases (final value = increased productivity over the equipment lifetime), marketing campaigns (final value = revenue generated, less marketing cost), real estate (final value = current property value + cumulative rental income, less mortgage interest, taxes, and maintenance), and stock or fund investments.

Total ROI is your full-period return expressed as a percentage of total cost. A 50% total ROI means your money grew by half — but how good that is depends entirely on how long it took. 50% over one year is excellent; 50% over ten years is poor (only ~4.1% annualized).

Annualized ROI lets you compare investments fairly. The S&P 500 has historically returned about 10% annualized over the long run, so any investment beating that has performed strongly in absolute terms. Real estate typically targets 8–12% annualized including appreciation and net rental income. Active business investments (hiring, marketing, equipment) usually need to clear 20%+ to justify the management effort.

A critical limitation: ROI says nothing about risk. A 30% return on a speculative crypto trade is not the same quality as a 30% return on an index fund — the variance and downside risk are massively different. Compare risk-adjusted measures like Sharpe ratio when you can; at minimum, ask yourself how much you could have lost in a downside scenario.

For marketing investments specifically, attribution is the hard part. Make sure you are measuring incremental revenue (revenue you would not have earned without the campaign), not total revenue during the period. A common rookie mistake is taking credit for organic sales that happened to coincide with a campaign.

For multi-year investments, watch out for time value of money. A dollar earned in year 5 is not equivalent to a dollar earned in year 1 — the present value is lower. For sophisticated decisions, compute net present value (NPV) using a discount rate. For most everyday business decisions, annualized ROI is sufficient.