To add to your fun;
In New York, interest does not start accruing the day the judgment is ordered but the day the clerk records (dockets) it. While the law states the judgment shall be docketed immediately, well, we all know what can happen when human error comes into play.
You’re confusing yourself. New York post judgment interest is 9% per annum. You can’t break it down into smaller increments such as you have and work it in reverse.
While a week is 7 days, 7X52 doesn’t equal 365 so you can’t do what you are doing. All calculations need to be in the form x/365x.09xprinciple (may have my pemdas screwed up there but as a math whiz I would think you understand the intent)
There are no weeks or months in a rate expressed as per annum since a month varies in length and there are not an equal number of weeks in a year.
You also need to understand that New York does not compound interest so you can’t use my formula and calculate interest on a daily basis and carry that forward to create a new balance with each calculation. You can figure amount owed each subsequent day only.
Yes that ignores the leap year and if you want to get hyper technical you would have to adjust for that by tossing in an x/366 for every fourth year but to use that you would have to also figure in the date of docketing in regards to its relation with a leap year.