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Excel and Loan Payments
Not only can the method described in the next section let you calculate the loan payment for one item, but once the formula has been entered, you can change the values for Price, Term, and Rate to see how making minor adjustments to these items will affect the monthly loan payment. For example, you could change the term from 5 years (60 months) to 3 years (36 months) to see if you could afford to pay the car off faster and save yourself from added interest charges.
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How to Calculate a Loan Payment
Strategy: Use the PMT function. Follow these steps.
1) Enter Price, Term in Months, and Annual Percentage Rate in cells B2:B4, as shown in Fig. 325 in the previous section.
The PMT function has three required arguments. The first argument is the interest rate. The second argument is the number of payments in the loan. The final argument is the original loan amount.
Gotcha: The interest rate must be entered as a percentage. If you are planning on monthly payments (which is normal), then you have to divide the annual percentage rate by twelve.
Gotcha: In financial terms, the bank is loaning you $25,000 – a positive amount coming to you. Thus, the payments that you make to the bank are really a negative amount – it is money leaving your wallet. For this reason, the result of the PMT function will be negative. However, you can precede the PMT function with a minus sign in order to return a positive payment amount.
2) Enter this formula in cell B6: =–PMT(B4/12,B3,B2). See Fig. 326.
Summary: The PMT function is great at calculating house or car loans.
Functions Discussed: =PMT()
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More Excel Tips
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