How to Calculate Amortization on the BA II Plus
AMORT continues from the TVM registers: solve the payment first, then ask for any payment range P1–P2 to see interest, principal and the remaining balance. The worksheet uses the unrounded PMT.
Step by step
- 1
Solve the loan in TVM first
Store N, I/Y, PV, FV and P/Y; [CPT] [PMT]. The unrounded payment drives everything below.
[CPT][PMT]
- 2
Open AMORT
2ND + PV opens the worksheet at P1 = 1.
[2ND][AMORT]
- 3
Set the range P1 and P2
P1 ENTER, [↓], P2 ENTER. Year two of a monthly loan: P1 = 13, P2 = 24.
13[ENTER][↓]24[ENTER]
- 4
Read BAL, PRN, INT
[↓] walks the three computed lines for the whole range. PRN is shown as the balance reduction (positive when the loan falls).
[↓][↓][↓]
Worked example (T8): first payment of the T1 loan
After solving the 360-month 6% / 100,000 loan (PMT = −599.5505…), AMORT P1 = P2 = 1 gives INT = 500.00 (100,000 × 0.5%), PRN = 99.55 and BAL = 99,900.45.
[2ND][AMORT]1[ENTER][↓]1[ENTER][↓][CPT]
Web practice cannot replace the physical calculator in a proctored exam — only calculators on the exam organizer’s current list are allowed.
Frequently asked questions
Why do I need the unrounded PMT?
+
Rounding the payment to cents changes every split of interest and principal slightly. The machine amortizes with the stored full-precision PMT — so does Keysheet.
How do I amortize one full year?
+
Set P1 = 1, P2 = 12 (monthly loan) — INT and PRN then total the entire first year, BAL is the year-end balance.