Amortised loans are a common loan repayment option where borrowers repay a fixed monthly instalment that covers both interest and principal. When choosing a loan, the EMI (equated monthly instalment) is a key consideration because it determines your monthly cash flow. An amortised loan keeps the EMI amount constant throughout the loan term and follows a predetermined repayment schedule.
Below we explain what an amortised loan is, how amortisation works, how it differs from other credit types, how to build an amortisation schedule, and the benefits of choosing this repayment method.
What is an Amortised Loan?
An amortised loan is one in which every monthly payment contains both interest and principal. Early payments primarily cover interest, while later payments contribute increasingly to the principal balance. By the end of the term, the loan balance reaches zero if all EMIs are paid on time.
Typical examples of amortised loans include personal loans, education loans and auto loans. In contrast, some products—such as credit cards and certain mortgage structures—may not be fully amortised.
How Does Amortisation Work?
Amortisation works through a schedule the lender or calculator generates using the loan principal, interest rate, tenure and payment frequency. This schedule shows how each EMI is split between interest and principal across the loan term.
At the beginning of the loan, most of the EMI goes toward interest because the outstanding principal is highest. As you make payments, the outstanding principal decreases, so the interest portion of each EMI falls and the principal portion rises. This inverse relationship between interest and principal is the characteristic pattern of amortisation.
How Do Amortised Loans Differ from Other Credit Options?
Amortised loans contrast with other repayment types such as balloon loans and revolving credit.
- Balloon loans: These typically have smaller periodic payments during the term and a large lump-sum payment of the remaining principal at the end of the term.
- Revolving loans: Examples include credit cards and lines of credit. They allow repeated borrowing up to a limit, and payments vary depending on usage; there is no fixed EMI schedule.
How to Calculate an Amortisation Schedule
Creating an amortisation schedule manually involves repeating a few steps for each payment period. The main steps are:
- Step 1: Gather loan details—principal, annual interest rate and tenure.
- Step 2: Convert the annual interest rate to a monthly rate and compute the EMI using the standard EMI formula or a calculator.
- Step 3: For the first payment, calculate interest = outstanding principal × monthly interest rate; the remainder of the EMI reduces the principal.
- Step 4: Subtract the principal portion from the outstanding principal to get the new balance and repeat for each month.
- Step 5: Continue the process until the outstanding principal is fully repaid, producing a complete amortisation schedule.
While manual calculation is possible, online amortisation calculators simplify this process and instantly display the payment breakdown and schedule.
Benefits of Amortisation
Amortised loans offer several advantages:
- Predictable monthly payments help borrowers budget effectively.
- The structured schedule reduces credit risk for lenders while giving borrowers clarity on how quickly principal declines.
- An amortisation schedule makes it easy to compare loan offers and understand total interest costs over the term.
Because amortised loans avoid a large final payment, they are often preferable for borrowers seeking manageable, steady repayments.
FAQs on Amortised Loans
What types of loans are amortised?
Common amortised loans include personal loans, car loans and student loans—any loan repaid through fixed periodic payments that cover both interest and principal.
What is the difference between an amortised loan and a fixed loan?
An amortised loan describes how payments are allocated between interest and principal over time. A “fixed” loan often refers to a fixed interest rate that does not change during the term. An amortised loan can have a fixed or variable interest rate; the defining feature is the repayment structure, not the interest type.
What does 5% amortisation mean?
In loan terms, referring to 5% amortisation usually means the loan carries an annual interest rate of 5% and the interest is spread over the repayment period according to the amortisation schedule.
How is amortisation calculated?
Amortisation calculations use the EMI formula and iterative interest/principal breakdowns for each period. A compound form often used in prepayment or amortisation contexts is:
Net Prepayments Amount = Principal × [(1 + i)^n − 1] / [i × (1 + i)^n],
where i is the periodic interest rate and n is the number of periods. For practical use, online amortisation calculators or spreadsheet functions provide quick, accurate schedules without manual computation.