What is the payback period?

The payback period is the length of time it takes for an investment to generate enough cash flows to recover its initial cost. For example, a $10,000 investment that returns $2,500 per year has a simple payback period of 4 years.

What is the difference between simple and discounted payback period?

The simple payback period counts raw cash flows without adjusting for the time value of money. The discounted payback period applies a discount rate to future cash flows, making each future dollar worth less than a dollar today. The discounted period is always longer than or equal to the simple period.

What discount rate should I use?

The discount rate typically reflects your cost of capital or minimum required rate of return. Common choices include the weighted average cost of capital (WACC), a hurdle rate set by management, or a risk-free rate plus a risk premium. A higher rate makes distant cash flows worth less, increasing the discounted payback period.

What does "payback period not reached" mean?

It means the cumulative cash flows never recover the initial investment within the years you entered. Either the cash flows are too small, or you need more years. Try adding more years or increasing the cash flow amounts.

Can cash flows vary from year to year?

Yes. This calculator supports variable annual cash flows. Each row represents one year, and you can enter a different amount for each year. Negative cash flows (additional costs) are also supported.

Payback Period Calculator

Name: Payback Period Calculator
Availability: InStock
Author: Nham Vu

Enter your initial investment and annual cash flows to find out exactly how many years it takes to break even, using both simple and discounted methods.

Investment Details

Initial Investment

Discount Rate (for discounted payback)

Annual Cash Flows

Enter an investment amount and cash flows, then click Calculate.

Simple Payback

—

years

Discounted Payback

—

at 10% discount rate

Initial Investment: —

Total Cash Flows: —

Net Gain/Loss: —

Cumulative Cash Flow Table

Year	Cash Flow	Cumulative	Disc. CF	Cum. Disc.

Summary

Enter your initial investment and annual cash flows to find out exactly how many years it takes to break even, using both simple and discounted methods.

How it works

Enter the initial investment amount (the upfront cost).
Set the discount rate for the discounted payback period calculation.
Add one cash flow row per year using the "Add Year" button.
Enter the expected net cash inflow for each year.
Click "Calculate" to see the simple and discounted payback periods.
Read the cumulative cash flow table to see exactly when you break even.

Use cases

Evaluating whether a capital equipment purchase will pay off quickly enough.
Comparing two competing investment projects by their payback speed.
Assessing real estate or rental property investment recovery timelines.
Analyzing the break-even horizon for a new business or product launch.
Checking solar panel or energy efficiency upgrade payback timelines.
Performing quick feasibility checks before detailed DCF analysis.

Frequently Asked Questions

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Last updated: 2026-05-23 · Reviewed by Nham Vu