Time to ROI Calculator

Return on investment is the net gain from an investment divided by its cost, expressed as a percentage. Net gain is total benefit minus cost. An ROI of 100 percent means the investment returned double the money put in (the original cost back plus an equal gain). It is a standard measure for comparing the profitability of different investments.

Time to ROI, also called the payback period, is the upfront cost divided by the net benefit per period. It tells you how many periods of returns are needed to recover the original investment. After that point, further returns are net gain. This calculator reports both the payback period and the overall ROI across the horizon you enter.

No. It uses a simple, undiscounted payback and ROI, which is transparent and adequate for many short-horizon decisions. For long-horizon investments where the time value of money matters, a discounted method such as net present value gives a more accurate picture. Treat this as a fast first-pass screen.

Benefit per period is the recurring value the investment produces: added revenue, cost savings, or both, net of any recurring running cost. It is a user-editable input because it is specific to your case. Enter a conservative, defensible figure, since an optimistic benefit makes both the payback and the ROI look better than they are.

Not on its own. A positive ROI means the investment makes money, but you should compare it against alternatives, the risk involved, and the payback period. A small positive ROI with a long payback may be worse than a faster, surer option. ROI is one input to the decision, not the entire decision.