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Will this capex pay back?

Payback, net present value and yearly return on the spend. Change any figure and the answer updates.

Your figures

The spendTotal cost of the projectExtra revenue a yearWhat the project adds to revenue each yearFlow-through %How much of each extra revenue dollar reaches profitCost saving a yearWhat the project saves each yearLife, yearsHow many years the benefit lastsDiscount rate %Your cost of money, for NPV

Payback
4.7 years
NPV
+$194,168
Return
21.3% a year
Each year adds
$96,000

The working

Each year adds = $180,000 × 45% + $15,000 = $96,000
Payback = $450,000 ÷ $96,000 = 4.7 years
NPV = −$450,000 + $96,000 × 6.7101 (8% over 10 years) = +$194,168
Return = $96,000 ÷ $450,000 = 21.3% a year