What Is the 28/36 Rule and How Does It Affect My Mortgage?

With mortgage and refinance rates at modern-day lows, there is renewed interest in the 28/36 rule. In short, the 28/36 rule lets you and your lender know how much house you can safely afford. Here, we’ll cover how the 28/36 rule works and how it can help prevent financial hardship.

What is the 28/36 rule?

The 28/36 rule is a guide that helps mortgage lenders determine how large a mortgage you can afford. It’s based on two calculations: a front-end and a back-end ratio. Here’s how it works.

Front-end ratio: No more than 28% of your income

The front-end ratio is how much of your income is taken up by your housing expenses. According to the 28/36 rule, your mortgage payment — including taxes, homeowners insurance, and private mortgage insurance — shouldn’t go over 28%.

Let’s say your pre-tax income is \$4,000. The math looks like this: \$4,000 x 0.28 = \$1,120.

In this scenario, your total mortgage payment shouldn’t exceed \$1,120. If lenders see that your monthly payment is over 28%, they worry you’ll have trouble making payments. In short, they want to be sure your annual income is more than enough to cover your mortgage payment even if things go south.

Ideally, by sticking to the 28/36 rule, you will have enough money for debt repayment and to build a healthy savings account that can get you through tough times.

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Back-end ratio: No more than 36% of your income

The back-end ratio is all of your expenses compared to your income. Lenders prefer your expenses stay under 36% of your income. This could include:

• Mortgage payments
• Child support
• Alimony
• Homeowners association fees
• Car loan
• Credit card payments
• Other expenses

To figure out your back-end debt ratio, multiply your monthly gross income by your total monthly debt payments.

If your income is \$4,000, the math looks like this: \$4,000 x 0.36 = \$1,440.

According to the 28/36 rule, your total monthly debt should be no more than \$1,440.

One quirk of the 28/36 rule is that any debt scheduled to be paid off in less than 10 months is excluded from the back-end calculation. For example, if you’re paying child support until your child turns 18 and that child’s 18th birthday is two months away, that fixed expense will not be included in your total monthly debt.

The 28/36 rule applies only to conventional loans. Here is a comparison of front-end and back-end income ratios for different loan types:

View more information: https://www.fool.com/the-ascent/mortgages/28-36-rule/

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