Free startup finance tool

Payback Period Calculator

A payback period calculator estimates how long it takes for an investment to recover its upfront cost from future net cash flow. Use this tool to compare simple payback and discounted payback before committing budget to a product, campaign, or operating investment.

Simple payback

6.7 months

Undiscounted recovery time

Discounted payback

7.0 months

Uses 12% annual discount rate

36 month ROI

627.9%

Cumulative cash return

Inputs

Investment assumptions

Change the assumptions to model a campaign, new feature, equipment purchase, or operating investment.

Upfront investment

Monthly cash inflow

Monthly operating cost

Monthly cash-flow growth (%)

Annual discount rate (%)

Decision read

What the payback result means

Simple recovery

6.7 months

Best for a quick liquidity read.

Discounted recovery

7.0 months

Best for comparing riskier investments.

Break-even month

Month 7

First month cumulative cash flow covers cost.

Cash-flow schedule

Cumulative recovery table

Month	Net cash flow	Discounted flow	Cumulative	Discounted cumulative
Month 1	$7,000	$6,931	$7,000	$6,931
Month 2	$7,140	$6,999	$14,140	$13,930
Month 3	$7,283	$7,069	$21,423	$20,999
Month 4	$7,428	$7,139	$28,851	$28,137
Month 5	$7,577	$7,209	$36,428	$35,347
Month 6	$7,729	$7,281	$44,157	$42,627
Month 7	$7,883	$7,353	$52,040	$49,980
Month 8	$8,041	$7,426	$60,081	$57,405
Month 9	$8,202	$7,499	$68,282	$64,905
Month 10	$8,366	$7,573	$76,648	$72,478
Month 11	$8,533	$7,648	$85,181	$80,126
Month 12	$8,704	$7,724	$93,885	$87,850
Month 24	$11,038	$8,693	$212,953	$186,725
Month 36	$13,999	$9,784	$363,961	$298,010
Month 48	$17,754	$11,012	$555,475	$423,260
Month 60	$22,517	$12,394	$798,361	$564,229
Month 72	$28,557	$13,950	$1,106,399	$722,891
Month 84	$36,217	$15,701	$1,497,066	$901,464
Month 96	$45,932	$17,671	$1,992,527	$1,102,448
Month 108	$58,253	$19,889	$2,620,890	$1,328,655
Month 120	$73,879	$22,385	$3,417,807	$1,583,252

How to use it

Calculate payback period in four steps

Step 1

Enter the upfront investment

Add the one-time cost required to launch the project, campaign, product, equipment purchase, or investment.

Step 2

Add monthly cash inflow and operating cost

Enter expected monthly revenue or savings and subtract any monthly costs needed to keep the investment running.

Step 3

Set growth and discount assumptions

Use monthly cash-flow growth and annual discount rate to compare simple payback with discounted payback.

Step 4

Review the payback month

Use the result, ROI, and cumulative table to decide whether the payback period is acceptable for your risk level.

FAQ

Payback period questions

What is a payback period calculator?

A payback period calculator estimates how long it takes for an investment to recover its upfront cost from future net cash flow.

What is the payback period formula?

For even cash flow, payback period equals initial investment divided by periodic net cash flow. For uneven cash flow, add each period until cumulative cash flow turns positive.

What is discounted payback period?

Discounted payback period calculates recovery time after discounting future cash flows to reflect the time value of money and investment risk.

Is a shorter payback period better?

A shorter payback period usually means faster capital recovery and lower liquidity risk, but it does not measure total long-term profit by itself.

When should founders use payback period?

Founders can use payback period to compare marketing spend, product investments, equipment purchases, and experiments where cash recovery timing matters.

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