I loaned a friend 40,000.00 for starting business with promissory note requiring monthly interest payments of 300 (at 9% interest) for 2 years initial period at end of which the entire principal and pending interest was to be returned or note renewed with similar terms.
Friend paid as follows ...
1) paid for first 6 months regularly (300 x 6)
2) then missed interest payments for 5 months
3) then paid for 3 months worth of interest together (900.00) on the 12th month
4) and then totally stopped paying interest for next 18 months.
5) Then paid another 600
6) Then stopped for next 5 months
7) Now agrees to settle the account with full interest (including any compounding during unpaid times) and return of full principal.
My dilemma is how to go about calculating the compound interest during missed payments (i.e. over the original 300 interest per month and on the total principal with nominal rate (i.e. not the 9% original simple interest rate, but more like 2% or so) and at the same time apply lump sum payments in between missed payment periods to interest first and then principal.
Does anyone know if is there a loan calculator to handle this complex scenario?
It does not need to be perfect just fair enough to handle most of the above scenario as I have unfortunately made more than one such loans to more than one such missing payment (but ulttimately willing to pay) friends.
Any and all helpful replies are appreciated. Thanks in advance.