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 FileMaker Pro Custom Functions

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InterestRateBalloon ( principal; balloon; payment; periods; rate )

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  Average rating: 4.3  (32 votes)
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Ralph Lilienkamp, Self

Find the interest rate for a balloon note

Sample Input:
98000; 41000; 1448; 60; .006
Sample Output:

 Then copy & paste into FileMaker Advanced's Edit Custom Function window.

Click here to copy To Clip Manager if you have myFMbutler's Clip Manager installed


This calculation uses an itertive method to solve the equation for the interest rate. It starts with an estimated rate and calculates a new rate. If the 2 rates are close enough the calculation quits. If not, the new rate is used as the estimate and the calculation is repeated. Each iteration brings the calculated rate closer to the estimaed rate.

Do not use zero as an intial rate.

Note: these functions are not guaranteed or supported by Please contact the individual developer with any questions or problems.

This is my Custom Function and I want to edit it


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