What Is Your Debt-To-Income Ratio and How To Calculate It

debt to income ratio
By Matt Mayerle
Modified on July 16, 2025

When you apply for a loan, one of the first things lenders check is your debt-to-income ratio (DTI). This simple percentage shows how much of your monthly income goes toward paying off debts. Lenders use it to quickly assess whether you’re likely to handle new payments responsibly.

Calculating your DTI involves dividing your total monthly debt payments by your gross monthly income and multiplying by 100. For example, if you pay $2,000 a month on debts and earn $5,000 before taxes, your DTI is 40%.

DTI is one of five major factors lenders consider. A lower DTI signals less financial strain and a higher chance you’ll pay on time, reducing the lender’s risk. Knowing your DTI before applying can give you an advantage.

What Is Debt-To-Income (DTI) Ratio?

Your debt-to-income ratio measures the amount of debt you have against income. More specifically, it is a ratio of total monthly debt payments divided by gross monthly income. 

A debt-to-income ratio allows a person to figure out how much more debt they can take on and can provide some insight into their financial health. There are two types to know about: front-end and back-end. A front-end ratio encompasses housing-related costs, while a back-end ratio accounts for all other monthly debt payments, such as personal loans and credit card payments. 

What Is a Front-End Ratio?

A front-end ratio is your monthly housing-related costs in comparison to your monthly income. Here is how it is calculated: 

Front-End Ratio = (Total Monthly Debt Payments / Gross Monthly Income) × 100

Monthly housing costs typically include:

  • Monthly mortgage payment
  • Rent payment
  • Property taxes (if you pay them in monthly payments) 
  • Homeowner’s insurance 
  • Mortgage insurance (e.g., PMI or MIP, if applicable)
  • HOA dues (if applicable)

What Is a Back-End Ratio?

A back-end ratio accounts for total monthly debt obligations, along with your housing costs. Here is how it is calculated:

Back-End Ratio = (Total Monthly Debt Payments / Gross Monthly Income​ ) × 100

You’ll have to typically include the following monthly debt payments:

  • Auto loan payment
  • Credit cards
  • Personal loans 
  • Mortgage or rent 
  • Student loan payments 
  • Child support payments 

How Is Debt-To-Income Ratio Calculated?

Here is a step-by-step guide on how debt-to-income ratio (DTI) is calculated: 

  1. Step 1: Add all of your recurring monthly debt — This includes loan payments, credit card payments, mortgage or rent, etc. This does not include other things like groceries or utilities that you would typically use when creating a budget. Instead, focus only on debt. 
  1. Step 2: Add up your monthly income — This is your pre-tax income from all sources (salary, bonuses, freelance income, etc.).
  1. Step 3: Use the formula — DTI Ratio = (Gross Monthly Income / Total Monthly Debt Payments​) ×100

Once you get to your DTI ratio, you’ll know exactly how much of your total monthly gross income goes towards your debt. 

Why Does Your Debt-To-Income Ratio Matter?

Your debt-to-income ratio can matter quite a bit when you are seeking out loans, credit cards, or any other form of credit, as it has a direct impact on your creditworthiness and credit score. 

When lenders consider an applicant for eligibility, they look at several factors for a risk analysis, including debt-to-income ratio. For example, with mortgages, lenders typically want borrowers to have a DTI that is lower than 43%, and it is one of the major factors they consider for loan amount and eligibility. Another example is with car loans. These lenders typically prefer a DTI below 36%–45%. 

When this ratio is high, an applicant can be more of a risk, and therefore be denied funding, get a lower amount, and/or a high interest rate. 

What Is a Good Debt-To-Income Ratio?

Generally, anything less than 36% is an ideal DTI, as it signifies to most lenders that you have an acceptable debt load. This will be a good sign to most lenders, for example when buying a home, you will get through most mortgage thresholds with a DTI of 36%. If your DTI is higher than that, you can bring it down by focusing on debt payoff, or by increasing your income, if possible. 

While having an even lower debt-to-income ratio than 36% is better, it’s also important to understand that having some debt to pay off can help build your credit portfolio and credit score. 

How To Improve Your DTI Score

There are several things you can do to improve your debt-to-income ratio (DTI), here are some options you can consider: 

  1. Avoid More Debt — If you can do so, try to avoid taking on additional debt when trying to improve your DTI. If you do need to borrow funds for an emergency, be smart about what credit option you choose. At CreditNinja, we offer payday loan alternatives that come with steady monthly payments and competitive interest rates. That way you can take care of your emergency without spiraling into a cycle of debt that you’ll find with payday loans. 
  1. Create a Budget That Focuses on Debt Payoff — A budget can be an extremely helpful tool when trying to improve your DTI! You can choose whichever method you like, the envelope method and the 50/30/20 method are just a few of the popular options out there. From here, you can cater your budget to focus on debt payoff, and if you can follow through, you may see your DTI go down in no time. 
  1. Try Mapping Out Your Debts — This approach is less intense than a budget. If you don’t want to take a look at all your monthly expenses, then simply focusing on just your debts will work. You can go through your credit reports, bank statements, or apps and simply calculate your debt on a monthly basis. From here, you can figure out how you want to tackle debt payoff, whether you want to focus on the highest balance, the highest interest rate, or maybe even the lowest balance first, it’s really what is best for your finances.
  1. Increase Your income — Another effective way to improve your DTI is to increase your income. If you have the extra time and or skills, then finding ways to make some extra money will mean a lower DTI. You can also use those extra funds to pay off more debt, which can lower your DTI even further. 
  1. Consolidate Your Debt  — In some cases, consolidating your debts can mean a lower monthly payment, which will lower your debt-to-income ratio. If this also helps you pay off your debts faster, this can also help decrease your DTI. For credit card balances, a balance transfer card is an option. 

Final Thoughts on Debt-To-Income (DTI) Ratio 

Understanding your debt-to-income ratio is essential when preparing to take on new financial responsibilities like auto loans, mortgage payments, or credit cards. A healthy DTI signals to lenders and credit bureaus that you’re managing your monthly bills responsibly, which can positively impact your credit report and future loan approvals. 

Whether you’re aiming to improve your financial standing or qualify for better loan terms, regularly monitoring your DTI and taking steps to reduce it—like consolidating debt or increasing income—can make a big difference. 

Ultimately, keeping your debt-to-income ratio low ensures that your financial commitments stay manageable and that you’re better positioned for future financial success.

References:

  1.  What is a debt-to-income ratio for a mortgage? | Bankrate
  2. Debt-to-Income Ratio for Car Loans: What To Know | LendingTree

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