How to lower debt to income ratio for mortgage approval

Published September 1, 2017

Updated November 19, 2025

Lucy Randall (NMLS ID: 1571868)
by Lucy Randall (NMLS ID: 1571868)

 Shadowy Image of Modern and White Computer Chair, Desk and a Laptop

When I talk to customers about getting a mortgage, they’re often concerned about their credit score, which is an indicator of their ability to pay back loans and can affect the rates they’ll be able to get. While credit scores are certainly important, what they often don’t know is that another number, debt-to-income ratio (DTI), can play an even bigger role in their ability to get a mortgage. In fact, a high DTI is the #1 reason mortgage applications get rejected1. So what's a DTI, exactly? Your debt-to-income ratio is all your monthly debt payments divided by your gross monthly income. I’ll get into the specifics of this calculation next.

Most lenders typically offer loans to creditworthy borrowers with DTIs as high as 43-47%. That limit is based on policies by government-backed lenders like Fannie Mae, put in place to protect customers against predatory lending practices. As of July 29th, 2017, we are working with Fannie Mae to offer loans with DTIs of up to 50% for creditworthy borrowers2. However, the lower your DTI, the more financing options will be available to you. Let’s look at what goes into calculating that number.



How to calculate the debt to income ratio

On the one hand, the math for [calculating your DTI](https://better.com/content/housing-expense-ratio) is simple – we add up what your monthly debt will be once you have your new home (such as student loans, car loans, credit card bills, and your future mortgage payment) and divide it by your gross monthly income (how much money you earn before taxes).

" Debt to Income Ratio

The tricky part about calculating DTI is that there can be several moving parts.

For example:

  • If you haven’t found your new home yet, we won’t know your exact mortgage payments, property taxes, or insurance payments, so we’ll have to estimate.
  • If you already own a home, we’ll need to include both your future and current mortgage payments as debt (unless the purchase of your new home is contingent on the sale of your old home).

    In addition, when we calculate income (the other half of the DTI equation), we use conservative calculations because we want to make sure you get a mortgage that’s affordable, now and in the future.

For example:

  • If you’re self-employed or compensated by commission or RSUs, we may not be able to count all 100% of that income, given that these forms of income tend to be less consistent.
  • If you are self-employed, it’s typically beneficial to write off your business expenses to lower your tax bill. But those tax deductions may also lower your qualifying income, since underwriters are looking at your net (not gross) income.
  • If you have rental income from an investment property, we’ll need to see that income on your tax returns (or rental checks if your taxes haven’t been filed yet) and we’ll only be able to use a portion of that income to be conservative.
  • If you plan on turning your current home into a rental property, you’ll need to have a lease agreement in place for us to consider the potential income.

 Got More Questions? Our Free Guide Has the Answers. Get the Guide

We can help give you clarity about your DTI

At Better Mortgage, our goal is to give you as much certainty as we can, as soon as we can, about how much you’ll be able to get financing for.

When you get our 3-minute pre approval, we run a soft credit check (which doesn’t affect your score). This allows Mortgage Experts like me to look at your debts and credit in more detail and get a more accurate picture of your DTI.

If you’re planning on buying soon, we also encourage you to upgrade to our verified pre-approval. Our underwriting team will review things like your tax returns, pay stubs, and any other documents specific to your financial situation, so we can tell you exactly how much you are qualified to borrow. This helps ensure there aren’t surprises about your DTI when you do apply for a mortgage.

Tips to consider for lowering your DTI

[Lowering your DTI](https://better.com/content/what-percentage-of-income-should-go-to-mortgage) can have a big impact on the type of [financing you can get](https://better.com/content/how-to-qualify-for-a-mortgage). If you have some flexibility on when you plan on buying, taking time to lower your DTI (and improve your credit score) can save you a lot of money over the life of your loan.

A few DTI reduction strategies to consider:

  • If possible, pay off your car loan before applying for your mortgage.
  • If you plan on purchasing a car, considering waiting until after you’ve bought your home.
  • Start paying off your credit cards in full, one by one. (Don't close the cards after you pay them off, as this can hurt your credit score.)
  • If possible, refinance or consolidate current loans to reduce your monthly payments.
  • Consider adding a co-borrower with a low DTI to your loan (keep in mind that if they have a low credit score, it could negatively affect your financing options).
  • If you plan on using rental income, make sure you have lease agreements in place.
  • If you plan on living with a partner, parent, or roommate in your new home, talk to us about how we might include some of that income in your DTI calculation.

Ready to explore your options?

We can help you understand your DTI and the financing options available to you. Start by getting your 3-minute pre approval. Then schedule a call so we go over the numbers with you.



  • https://www.housingwire.com/articles/40382-fannie-mae-raises-debt-to-income-ratio-to-further-expand-mortgage-lending ↩

  • Related posts

    What is a mortgage commitment letter?

    Find out what a mortgage commitment letter is, what it includes, how to get one, the next steps, and why Better is a smart option for securing your home loan.

    Read now

    7 people you need when buying a home

    Many people are involved in the process of buying a home. You can expect to talk to everyone from a real estate agent to a loan consultant, and more.

    Read now

    How to budget for your monthly mortgage payment

    Learn how to budget for your monthly mortgage payment with expert tips to manage finances, reduce stress, and stay in control of your homeownership costs.

    Read now

    The 3 most important numbers for your mortgage application

    Your mortgage application comes down to three key numbers. Learn why they matter and how understanding them can help you make smarter home buying decisions.

    Read now

    Vishal Garg, Founder and CEO of Better

    Inspired by his own homebuying frustrations, Vishal Garg founded Better to reinvent mortgages with a seamless, faster, and customer-focused online experience.

    Read now

    What the labor market slowdown means for mortgage rates and homebuyers

    The U.S. labor market is slowing—and that could mean lower mortgage rates ahead. Learn how this shift affects home affordability, mortgage qualification, and whether now is the right time to buy.

    Read now

    Home Equity Loan vs. Mortgage: What's a Better Option

    Compare home equity loans vs mortgages to understand borrowing limits, interest rates, and tax benefits. Make informed financial decisions for your home.

    Read now

    Jobs report may be the last for a while: What this means for mortgage borrowers

    With the government shutdown canceling economic data reports, economists will have to make more blindfolded decisions that affect mortgage borrowers.

    Read now

    Documents needed for mortgage pre-approval: Everything you’ll need

    Find out the documents needed for mortgage pre-approval and special circumstances. Use our smart checklist to prepare, stay organized, and buy confidently.

    Read now

    Related FAQs

    Interested in more?

    Sign up to stay up to date with the latest mortgage news, rates, and promos.