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The Negative amortization

Category — General Notions
By Konstantin Vasilev Member of the Board of Directors of Cbonds, Ph.D. in Economics
Updated September 11, 2023

What Is Negative Amortization?

Negative amortization occurs when the principal amount of a loan gradually increases due to insufficient loan payments to cover the total interest costs for the given period. This situation arises because borrowers are permitted to make reduced payments for a specific duration within the loan’s term. Consequently, the received payments are allocated to cover the accruing interest on the loan, with any remaining unpaid interest costs being added to the principal amount.

Over time, this arrangement can result in substantial loan payments in the future. Once the reduced loan payment period concludes, the borrower resumes making regular payments to settle the outstanding loan balance.

For instance, if a borrower borrows $1,000 from a bank and repays only $950, the remaining $50 is incorporated into the loan’s principal balance. This type of arrangement is commonly encountered in various loan types, including mortgages, student loans, and credit card loans.

Instances of Negative Amortization Utilization

Negative amortization is employed by borrowers in two primary scenarios:

  1. Financial Hardship. Negative amortization may be employed when a borrower faces financial hardship and lacks the necessary funds to meet their monthly loan obligations. For instance, if a borrower loses their job and can no longer afford loan repayments, they may request a deferment, granting them temporary relief from making payments.

    Nevertheless, interest costs continue to accumulate during this period and are added to the loan principal. This increases the principal amount owed, and the borrower becomes responsible for repaying both the accrued principal and interest costs when they resume their regular loan payments.

  2. Insufficient Monthly Payment of Interest Costs. When a borrower falls short of covering the required monthly interest expenses, a portion of the interest remains unpaid. As the borrower is unable to fully meet the interest obligations, an outstanding interest amount is accrued and owed to the lender at the end of each payment period.

    The lender incorporates the unpaid interest into the loan balance, causing the outstanding loan amount to grow with each passing month. Eventually, the borrower must address the loan balance by either making a lump sum payment to settle the entire debt or committing to regular amortizing payments exceeding the original monthly payments specified in the initial loan agreement.


Let’s consider a practical scenario to understand the concept better. Imagine that John has obtained a 30-year mortgage with a 7.5% annual interest rate, and the remaining principal balance on his loan is $100,000. According to the loan terms, John is allowed to make monthly mortgage payments of $500 for a specified period within the 30-year term.

In the upcoming scheduled payment, John is obligated to cover the regular interest costs, which amount to $625 ($100,000 principal balance multiplied by 7.5% annual interest rate divided by 12 months).

However, facing financial constraints, John chooses to pay only the $500 interest cost as stipulated in the loan agreement. Consequently, an outstanding interest payment amount of $125 ($625 - $500) is added to the principal balance.

This addition of unpaid interest to the principal balance results in a new total balance of $100,125. The interest cost will be computed based on this increased principal amount in the subsequent repayment period.

What Is a Negatively Amortizing Loan?

A negatively amortizing loan, also known as a negative amortization loan or negative amortized loan, features a payment arrangement that permits the borrower to make scheduled payments that are lower than the interest charged on the loan. This results in the accumulation of deferred interest.

The deferred interest amount is then appended to the principal balance of the loan, causing the principal owed to grow over time rather than diminish.

How Does a Negatively Amortizing Loan Work?

Negative amortization occurs primarily when the interest accrued on the mortgage surpasses the payments made by the borrower.

It can also transpire when the loan terms permit partial interest payments rather than mandating the payment of accrued interest in each cycle. This is the case with balloon mortgages and other negative amortization loans.

Certain types of these loans provide the flexibility to either make abbreviated payments (referred to as partial payments) or defer payments until the end of a specified period, often a year. At the conclusion of this period, the borrower is expected to make a final, substantial "balloon" payment to cover any missed or partial payments.

This financing approach is frequently employed for mortgages on investment properties, such as houses intended for flipping or rental purposes.

While this financing option can enhance cash flow in the initial stages, it warrants caution. It has the potential to exert financial pressure if interest rates or the borrower’s financial circumstances unexpectedly change.

Pros and Cons of Negative Amortization Loans


Here are a few characteristics that make negative amortization loans a valuable option for many borrowers:

  1. Facilitating Business Growth. Initially, businesses embraced this arrangement as it allowed them to avoid adhering to the standard bank amortization schedule. Instead, they could tailor payments to their financial comfort, directing the surplus funds toward capital expansion or opting for higher payments at a later stage.

  2. Support for Higher Education. Negatively amortizing loans assist students in reducing the financial burden during their learning years. Upon completing their education, they can commence repayments once they begin earning. Consequently, students can pursue advanced studies with reduced loan installment obligations.

  3. Seasonal Business Adaptability. Some businesses operate only during specific seasons rather than year-round. Negative amortization loans prove beneficial in such cases, allowing borrowers to make lower payments during off-seasons and higher payments during active periods.


  1. Escalating Principal Balance. In negative amortization, the principal amount swells because borrowers make insufficient interest payments compared to their obligations. This shortfall accumulates and is added to the principal, eventually exceeding the value of assets. This poses a risk if the borrower cannot meet future payments.

  2. Interest Compounded on Interest. Negative amortization entails making minimal interest payments compared to the accruing interest on the loan. Consequently, the remaining interest is appended to the principal balance, and interest is then calculated on this augmented amount. This implies that borrowers are required to make payments on subsequent interest amounts, potentially leading to a heavier financial burden.

How to Prevent Negative Amortization

There are strategies to ensure you stay current on your payments and clear of compound interest’s pitfalls.

First and foremost, you can sidestep negative amortization by diligently scrutinizing all credit or loan agreements before signing. Exercise caution when encountering deferred or minimum payment options and confirm the absence of balloon payments.

Another effective approach to warding off balloon payments is to cover the interest due in each payment cycle consistently. If financially feasible, consider making additional payments to reduce the principal balance. However, before making extra payments, refer to your loan agreement for any prepayment clause. It’s essential to ensure you stay within your prepayment limit to avoid incurring prepayment fees.


  • Are negative amortization loans considered illegal?

  • Can student loans exhibit negative amortization?

  • How can I avoid negative amortization?

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