Time to Repay a Loan (NPER)
Syntax: NPER(Interest; Installment; Loan; Future; Type)
If you need an answer to a simple question such as “How many years should it take me to pay the money I borrowed, providing that I pay in equal chunks of money and the interest rate is constant?”, the NPER function is the right tool to use. Consider the following case: you borrow $100,000 (loan) at an annual rate of interest equal to 7.5%, and you want to pay back $10,000 each year. To see how many years it would take you to do this, use this formula:
=NPER(7.5%; -10,000; 100,000)
which returns 19.17 years!
Figure 8-9. Sample result of the NPER function
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