Program Bugs

Rather than a feature, if you notice some behavior of the calculator that isn’t what you expect or values that you believe to be incorrect, make a note of such things by adding comments to this page. You’ll need to create an account for yourself (if you haven’t already).

30 Replies to “Program Bugs”

  1. Bret,
    First of all, I’ve relied on your amortization calculator for years. Thank you.
    I wouldn’t call this a bug — the calculator calls the amount of the loan Principal. That seems to be the opposite meaning. I’d call it the Loan Amount.

    Possible bug — I’ve noticed recently that when I entertain the possibility of increasing my down payment on a prospective purchase, the highlighted line stays at the 104th week. It doesn’t matter how much I reduce the loan amount, the highlighted line remains the same. I believe the highlighted line used to creep upward as I increased the down payment in various scenarios I have tried.

    Thank you again for your calculators.

    1. The highlighted line will shift more according to the length of time of the loan, not the initial loan value.

      I don’t understand your statement about principal being the opposite meaning. Opposite of what? I do agree that Principal may be overloaded in a loan context, though I’d want a more concrete reference for what the proper terms should be.

  2. I calculated the amortization schedule on $200,000.00 payable in 3 annual payments at 3.00% using your calculator. The total interest was $4,013.27. When I compared it to a calculation from a bank using the US Rule on 365/365 the interest was $12,135.14. With the US Rule on 365/360 it was $12,597.28 but for some reason it was a payment period of 3 years and 15 days.
    What have I done wrong? Thanks

    approximately twice the amount and using the US Rule on 365/360 it was about $400.00 different.

  3. I am using Windows and have been using the calculator for years and LOVE it; however, about two weeks ago I began not being able to print the calculator. I called in my IT person and he says it is not in my settings as I am able to print all other sites, just not this one. It also freezes up my internet active page when I try. Any thoughts as to what I could do to remedy my inability to print the document?

  4. I am using Firefox, Windows 7 64-bit. I have used your interest calculator for years and I think it’s the best. However, I am now unable to print the amortization schedule even though the “Show Amortization Box” is checked.

    Thank you. I hope there is some way that I can keep using your program and get it to print the amortization schedule.

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