
Chapter 14: Applications  399
Calculating AmortizationCalculating AmortizationCalculating AmortizationCalculating AmortizationCalculating an Amortization Schedule
Calculating an Amortization ScheduleCalculating an Amortization Schedule
Calculating an Amortization Schedule
Use the amortization functions (menu items 9, 0, and A) to calculate balance, sum of 
principal, and sum of interest for an amortization schedule.
bal(
bal(bal(
bal(
bal( computes the balance for an amortization schedule using stored values for æ, PV, 
and PMT. npmt is the number of the payment at which you want to calculate a balance. It 
must be a positive integer <10,000. roundvalue specifies the internal precision the 
calculator uses to calculate the balance; if you do not specify roundvalue, then the TI-84 
Plus uses the current Float/Fix decimal-mode setting.
bal(npmt[,roundvalue])
GPrn(, 
Prn(, Prn(, 
Prn(, GInt(
Int(Int(
Int(
GPrn( computes the sum of the principal during a specified period for an amortization 
schedule using stored values for ¾æ, PV, and PMT. pmt1 is the starting payment. pmt2 is the 
ending payment in the range. pmt1 and pmt2 must be positive integers < 10,000. roundvalue 
specifies the internal precision the calculator uses to calculate the principal; if you do not 
specify roundvalue, the TI-84 Plus uses the current Float/Fix decimal-mode setting.