Interest Calculations & Amortization
Module 3:
Cash, Receivables, Payables
Duration:
45-60 minutes
Level:
Beginner to Diploma-Level
Lesson Objectives
➛ Calculate simple interest on notes payable and receivable
➛ Understand the concept of amortization
➛ Prepare an amortization schedule
➛ Record journal entries for interest accrual and payment
➛ Distinguish between interest expense and interest payable
➛ Explain how amortization affects financial statements
Key Vocabulary
➛ Simple Interest
➛ Principal
➛ Interest Rate
➛ Time Period
➛ Interest Expense
➛ Interest Payable
➛ Amortization
➛ Amortization Schedule
Simple Interest Formula
Interest = Principal × Rate × Time
Time is expressed in years | months ÷ 12
What Is Amortization?
Amortization is the process of paying off a loan through regular payments that include
➛ Interest portion
➛ Principal portion
Over time
➛ Interest decreases
➛ Principal repayment increases
➛ Loan balance reduces to zero
Structure of an Amortization Schedule
Period
Opening Balance
Interest
Payment
Principal Paid
Closing Balance
Journal Entries Involving Interest
Accruing Interest | End of Period
Interest Expense
Interest Payable
Interest Payable
Dr
Cr
Cr
Journal Entries Involving Interest
Paying Interest and Principal
Interest Payable
Notes Payable
Cash
Notes Payable
Cash
Dr
Dr
Cr
Dr
Cr
Financial Statement Impact
Income Statement
➛ Interest Expense
Balance Sheet
➛ Notes Payable | remaining balance
➛ Interest Payable | if unpaid
Simple Interest Calculation
Calculate the interest for each case
➛ 5,000 at 10% for 6 months
➛ 12,000 at 8% for 9 months
➛ 20,000 at 6% for 1 year
Identify Interest Components
For each situation, identify
· Principal
· Rate
· Time
· Interest Expense or
· Interest Income
1. A company borrows 15,000 at 12% for 1 year
2. A business lends 8,000 at 9% for 6 months
Amortization Schedule | Short Loan
A business borrows 6,000 at 12% annual interest for 1 year, payable in 3 equal installments.
Tasks
➛ Calculate interest for each period
➛ Prepare a simple amortization schedule
➛ Identify total interest paid
Journal Entry Practice
Prepare journal entries for
➛ Accruing interest at month-end
➛ Paying one installment including interest and principal
➛ Paying the final loan balance
Mini Case Study
A company takes a loan of 24,000 at 10% interest, repayable over 2 years with equal annual payments.
Questions
➛ Calculate annual interest for Year 1
➛ Explain how amortization affects interest expense over time
➛ Which part of each payment reduces the loan balance?
➛ Where does interest expense appear in the financial statements?
➛ What happens to Notes Payable after the final payment?
Quick Quiz
➛ State the formula for simple interest.
➛ What is amortization?
➛ True or False | Interest is calculated on the outstanding balance.
➛ Which account records the cost of borrowing?
➛ What happens to interest expense over time in an amortized loan?
Answers ➧ Here
Credit Policies & Collection Management ➧ Here