How Do Interest Only Mortgages Work

An important financial accomplishment for many people is owning a home, and getting a mortgage is one of the most popular ways to achieve this goal. While traditional fixed-rate and adjustable-rate mortgages are widely known, interest-only mortgages are a lesser-understood option that can offer both advantages and disadvantages to homeowners.

How Do Interest-Only Mortgages Work
How Do Interest-Only Mortgages Work

In this article, we will look into How Interest-Only Mortgages Work, exploring the factors that borrowers should consider before choosing this financial option.

What is an Interest Only Mortgage?

An interest only mortgage, as the name suggests, is a home loan where the borrower initially pays only the interest portion of the loan for a specified period, usually between five and ten years. The borrower is not obligated to make any principal payments during this period, which usually account for a percentage of each month’s payments in a conventional mortgage.

How Does an Interest Only Mortgage Work?

An interest-only mortgage involves making payments solely toward the interest, which is the borrowing cost, during the initial years of the loan. Following this interest-only phase, you have the option to refinance, fully repay the loan, or begin making monthly payments that cover both the principal and interest. During this transition, your monthly payments will be higher than if you had been paying both principal and interest from the start. Importantly, unless you choose to make extra payments during the interest-only period, your home’s equity won’t have grown.

Before commencing principal repayment, your equity will consist only of your initial down payment and any appreciation in property value due to rising home prices. Typically, interest-only loans take the form of adjustable-rate mortgages, where the interest rate adjusts periodically based on a specified index after a set number of years. While adjustable-rate mortgages often begin with lower interest rates compared to fixed-rate loans, they can become costlier during the adjustable phase.

Who May be Eligible for an Interest only Mortgage?

Interest only loans generally require bigger down payments and more favorable debt-to-income ratios, in addition to having great credit scores, in comparison to a typical principal-and-interest mortgage. It’s important to keep in mind that the qualifying requirements for these mortgages are not standard and might change greatly between lenders. However, as a general guideline, individuals seeking interest-only mortgages tend to possess substantial monthly cash flow, anticipate growing incomes, and maintain significant cash reserves.  Lenders see these qualities favorably when evaluating loan applications.

Pros of an Interest only Mortgage

Depending on their financial condition and ambitions, certain borrowers may find the benefits of an interest-only mortgage to be enticing. Here are a few possible benefits:

Affordable Initial Payments

Initially, your monthly payments are more affordable compared to certain other loan types since you’re only covering the interest in the early years.

Increased Borrowing Capacity

Due to the lower interest only payments during the introductory period, you could be able to borrow a bigger sum of money.

Faster Repayment

Making additional payments toward the interest-only loan can lead to quicker repayment, as the reduced principal results in lower monthly payments. In contrast, extra payments on a traditional loan don’t reduce the monthly installments.

Enhanced Cash Flow

Lower initial expenses could free up extra funds in your budget, providing greater financial flexibility.

Cons of Interest-only Mortgage

Interest-only mortgages offer benefits but also come with notable drawbacks. Here are some of the cons:

Limited Equity Accumulation

With an interest-only loan, you won’t be building equity in your home until you start making payments toward the principal. This is important for home value appreciation.

Potential Loss of Equity

A decline in your home’s value can negate any equity gained from your down payment, potentially making it challenging to refinance.

Temporary Low Payments

While low monthly payments may seem appealing initially, they are not permanent. Your payments will significantly increase once the interest-only period concludes, necessitating repayment of the full loan amount.

Interest Rate Fluctuations

Interest-only loans often come with variable interest rates. If interest rates rise, the amount you pay in interest on your mortgage will also increase.


For certain borrowers, interest-only mortgages may be a good choice because they provide lower initial payments and more financial freedom. They do, however, also carry risks and complexity that call for careful thought. Before choosing an interest-only mortgage, borrowers should carefully evaluate their financial status, risk tolerance, and long-term goals. Making an informed choice that fits their unique requirements and circumstances requires consulting with a skilled mortgage specialist and exploring other financing options.

Frequently Asked Questions

Do Interest-Only Mortgages Pose Risks?

Interest-only mortgages do come with inherent risks, primarily because borrowers don’t accumulate equity in the early phase and encounter increased payments when switching to principal and interest payments. Hence, it’s crucial to thoroughly assess long-term affordability and be mindful of the possibility of interest rate fluctuations that could impact the loan’s cost.

Can Principal Payments Be Made During the Interest-Only Period?

Although some interest-only mortgages allow for voluntary principal payments to be made by the borrower during the interest-only period, it is important to verify this option with the lender because the particular terms may vary.

Is It Feasible to Refinance an Interest-Only Mortgage?

Refinancing an interest-only mortgage is indeed possible, but it’s a process that requires borrowers to meet specific lender criteria. To embark on a successful refinance, borrowers must qualify for a new loan based on their current financial standing and circumstances. Consequently, careful consideration of refinancing options and lender requirements is paramount before making any decisions related to an interest-only mortgage.



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