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

Dr
Cr



Journal Entries Involving Interest

Paying Interest and Principal

Interest Payable
Notes Payable
Cash

Dr
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