Negative Amortization: When Your Loan Balance Keeps Growing

Learn what negative amortisation is, how unpaid interest increases your loan balance, and what risks borrowers face.
Last Updated: May 19, 2026
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Negative Amortisation Explained

Negative amortisation happens when a borrower pays less than the interest charged on a loan. Instead of reducing the loan balance, the lender adds the unpaid interest to the principal amount, which increases the overall debt.

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How Negative Amortisation Occurs

In cases where the borrowers make less payments compared to the interest payments, the outstanding interest is accumulated with the loan principal. This increment leads to an increase in the balance of the loans.

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Why Negative Amortisation is Used on Some Loans

There are other flexible forms of loans such as some GPM loans (Graduated Payment Mortgage), which permit smaller early payments. Although this diminishes the short-term pressure it is likely to increase the cost of borrowing in the long term.

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What Happens to Your Loan Balance

The loan balance grows instead of reducing. Every missed interest payment adds to the principal amount and continuously increases the total debt.

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Impact on the Principal Amount

Lenders continuously add unpaid interest to the outstanding loan balance, which makes borrowers owe significantly more than the original loan amount and makes it increasingly difficult to reduce and eventually clear the debt.

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Negative Amortisation Risk

Increasing cost of borrowing is the greatest threat of negative amortisation. The accumulating amount of loans might mean higher payments in the future and financial stress in the future.

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Impact on Home Equity

In the case of property loans the negative amortisation can lower the home equity. Borrowers would be paying higher amounts as the loan principal increases as compared to the value of the property.

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Important Takeaway

Knowledge of negative amortisation assists the borrowers to prevent the increase in the cost of borrowing and unwarranted increase in debts. Terms of payment should be reviewed always to make sure that the amount of loan is decreasing steadily and not increasing.

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Disclaimer: The information provided on this website is for general informational purposes only and should not be considered financial or legal advice. Please consult with a qualified financial advisor before making any decisions.

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