Calculate your DTI ratio in seconds. See where you stand for mortgage and loan qualification — and exactly what you'd need to do to improve it.
Use your gross (pre-tax) monthly income from all sources.
Your debt-to-income ratio (DTI) is the percentage of your gross monthly income that goes toward paying your monthly debt obligations. It's calculated by dividing your total monthly debt payments by your gross monthly income and multiplying by 100. If you earn $5,000 per month before taxes and pay $1,500 per month in debt obligations, your DTI is 30%.
DTI is one of the most important numbers lenders look at when you apply for a mortgage, auto loan, personal loan, or credit card. It tells them whether you have enough income to comfortably take on additional debt. A low DTI signals financial health and repayment capacity. A high DTI signals that you're already stretched and may struggle with additional obligations.
Lenders often calculate two types of DTI. Front-end DTI (also called the housing ratio) includes only housing-related expenses — mortgage principal and interest, property taxes, homeowner's insurance, and HOA fees. Back-end DTI includes all monthly debt obligations: housing, credit cards, student loans, auto loans, personal loans, and any other recurring debt payments. When lenders talk about DTI qualification thresholds, they typically mean back-end DTI, which is what this calculator computes.
The traditional guideline is to keep your total DTI below 36%, with no more than 28% going toward housing costs. Many conventional mortgage lenders use 43% as their maximum DTI threshold. FHA loans may allow up to 50% DTI in some circumstances. The lower your DTI, the better your terms will be.
Include: Mortgage or rent payment, credit card minimum payments, auto loan payments, student loan payments, personal loan payments, child support or alimony, any other required monthly debt payment.
Do not include: Utilities, groceries, insurance premiums (non-mortgage), cell phone bills, subscriptions, or any discretionary spending. DTI is specifically about debt obligations, not total expenses.
There are only two ways to improve DTI: increase your income or decrease your monthly debt payments. Decreasing debt payments means either paying down balances (which reduces minimum payments) or eliminating debts entirely. Use our debt payoff calculator and multi-debt planner to build a plan that systematically reduces your monthly debt obligations. Every debt you eliminate improves your DTI — and using the debt avalanche or snowball method means you're eliminating individual debts completely rather than chipping away at all of them slowly.
Lenders evaluate two DTI figures when reviewing loan applications. Front-end DTI (also called the housing ratio) counts only housing costs: mortgage principal and interest, property taxes, homeowner's insurance, and HOA fees if applicable. Most conventional mortgage lenders want front-end DTI below 28%. Back-end DTI includes all monthly debt payments — housing plus credit cards, student loans, auto loans, personal loans, alimony, child support, and any other required monthly obligation. This is the number our calculator produces, and it's what most lenders mean when they say "DTI limit."
For a conventional mortgage, the standard back-end DTI limit is 43%. Fannie Mae's Automated Underwriting System (DU) may approve up to 50% for borrowers with strong compensating factors like significant cash reserves or excellent credit. FHA loans allow up to 57% in some circumstances. VA loans have no official DTI maximum but lenders typically prefer under 41%. Understanding which type your lender is evaluating — and which of your expenses they include — determines whether you qualify.
A common mistake when calculating DTI is including non-debt expenses. Lenders are specific about what counts. Include in your DTI: minimum credit card payments (not your actual payment — the required minimum), auto loan payments, student loan payments (even if in deferment — lenders use 1% of the balance or the documented payment, whichever is higher), personal loan payments, alimony and child support, any co-signed loan payments, and your proposed housing payment.
Do not include in DTI: utility bills, cell phone bills, insurance premiums (health, auto, life), subscriptions, groceries, gas, child care, or any discretionary spending. DTI is purely a debt-obligations ratio. Many people overestimate their DTI because they include living expenses that lenders don't count.
They measure different things and both matter — but in different ways. Your credit score primarily tells lenders how reliably you've managed past debt obligations. Your DTI tells lenders whether you have enough current income to take on new ones. A person can have an excellent credit score (800+) but a high DTI, and be declined for a mortgage because their income doesn't support additional debt. Conversely, someone with a moderate credit score but very low DTI may be approved because the income cushion reduces risk.
For mortgage applications specifically, DTI often matters more than credit score for the final approval decision, while credit score determines the interest rate you're offered. For credit cards and personal loans, credit score tends to dominate the approval decision, with DTI playing a supporting role. Know which factor is limiting your options before you apply.
There are only two levers: increase income or decrease monthly debt payments. Income increases through raises, promotions, second jobs, freelancing, or passive income streams. Debt decreases through strategic payoff using the multi-debt planner, consolidation to lower monthly payments, or eliminating debts entirely to remove their monthly obligation from the calculation.
The most powerful DTI improvement move is paying off a debt entirely. A $300/month car payment that disappears reduces your DTI by $300/month — permanently. Compare this to paying $100 extra on a balance that reduces your minimum payment by only $2/month — the DTI impact is minimal until the debt is completely gone. This is one reason why the debt snowball method (targeting smallest balance first) can be particularly valuable for people trying to improve their DTI quickly: eliminating small debts entirely removes their monthly payment from the DTI calculation immediately.
When you apply for a mortgage, lenders run your application through an automated underwriting system that evaluates dozens of factors simultaneously. DTI is one of the most heavily weighted. If your DTI is above 43%, most conventional mortgage applications will be automatically declined regardless of other strengths in your application. If it's between 36–43%, you may be approved but may face stricter requirements around down payment, cash reserves, or credit score.
Pre-qualification tip: calculate your back-end DTI including the proposed new mortgage payment before applying. Many people are surprised to discover their DTI disqualifies them from their target home price. If that's the case, use our debt payoff calculator and multi-debt planner to build a 12–24 month plan for reducing existing debt before applying. Every debt you eliminate improves your DTI and potentially unlocks a higher loan amount.
Conventional mortgage: Maximum 43–50% back-end DTI. Under 36% preferred. Under 28% front-end DTI preferred.
FHA loan: Up to 57% back-end DTI with strong compensating factors. 31% front-end preferred.
VA loan: No official maximum, but under 41% strongly preferred by most VA lenders.
Auto loan: Most lenders don't have a strict DTI cutoff, but prefer under 50%. Higher DTI leads to higher rates or down payment requirements.
Personal loan: Varies widely by lender. Online lenders may approve up to 50–55% DTI; traditional banks prefer under 40%.
Credit card: Credit card issuers typically don't calculate DTI directly — they rely more on credit score and income verification. However, high DTI can be inferred from multiple recent applications and high existing credit utilization.