Debt-to-Income Calculator

💰 Finance & Money

Debt-to-Income Calculator

Find your front-end and back-end DTI ratio — the exact numbers mortgage lenders look at before approving a loan.

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Debt-to-Income Ratio Calculator

Enter your gross (pre-tax) monthly income, housing payment, and other monthly debt payments.

Before taxes — your full paycheck amount, not take-home pay
Rent, or mortgage + taxes + insurance
Auto loans, student loans, credit card minimums, etc.
Please enter your gross monthly income to continue.
Back-End DTI Ratio
0%
Front-End DTI
0%
Back-End DTI
0%
Housing Payment
$0
Other Debt
$0
🟦 Housing🟧 Other Debt⬜ Remaining Income
Lender guidelines: Per the CFPB, a back-end DTI of 36% or less is generally considered healthy for homeowners. Many conventional mortgage programs historically capped Qualified Mortgages at 43% DTI, though current rules use price-based thresholds instead of a hard cutoff.
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What Is Debt-to-Income Ratio?

Your debt-to-income (DTI) ratio compares your total monthly debt payments to your gross monthly income, expressed as a percentage. Lenders use it as a core measure of whether you can comfortably take on more debt — it's one of the first numbers checked when you apply for a mortgage, auto loan, or major line of credit.

Front-End vs. Back-End DTI

Front-End DTI = Housing Payment ÷ Gross Monthly Income × 100
Back-End DTI = (Housing Payment + Other Debt) ÷ Gross Monthly Income × 100

Front-end DTI looks only at housing costs. Back-end DTI — the number lenders weigh most heavily — includes every recurring debt obligation: car payments, student loans, credit card minimums, and personal loans, on top of housing.

The 28/36 Rule

RatioGuideline
Front-end (housing only)28% or less
Back-end (all debt)36% or less

This classic lending guideline suggests keeping housing costs under 28% of gross income, and total debt under 36%. It's not a hard legal limit, but it's widely used as a healthy benchmark across the mortgage industry.

How to Use This Calculator

Enter your gross monthly income — before taxes, not your take-home pay. Add your housing payment (rent, or mortgage including property taxes and insurance if you own) and all other recurring monthly debt payments. The calculator shows both your front-end and back-end ratios instantly.

The Historical 43% Threshold

For years, the CFPB's Qualified Mortgage rule capped General QM loans at a 43% back-end DTI. That hard cutoff has since been replaced with price-based thresholds, but many lenders still treat 43% as an informal ceiling, and some loan programs (like certain FHA loans) allow higher ratios with compensating factors such as a large down payment or strong credit.

💡 Lowering your DTI before applying for a mortgage — by paying down a credit card or auto loan — can sometimes unlock a meaningfully better rate, not just loan approval.

Renters vs. Homeowners

The CFPB suggests renters aim for an all-debt ratio of 15–20% or less (since rent isn't counted as "debt" the way a mortgage is), while homeowners are generally guided toward the 36% back-end benchmark described above.

How to Lower Your DTI

  • Pay down revolving debt: credit card minimums weigh on DTI more than their balance might suggest
  • Avoid new debt before a major application: a new auto loan or financed purchase raises your ratio right when lenders are checking it
  • Increase income: a raise, side income, or added household earner directly improves the ratio
  • Pay off a loan entirely: eliminating a full payment helps more than partially paying down several

Where This Fits Your Bigger Picture

If your DTI is higher than you'd like, run your numbers through our debt avalanche calculator or debt snowball calculator to build a payoff plan, then check how that affects your mortgage affordability once your ratio improves.

Frequently Asked Questions

What is a good debt-to-income ratio?
36% or below (back-end) is generally considered healthy for homeowners. Below 28% for housing alone (front-end) is the traditional benchmark.
Does DTI include rent or just loan payments?
It includes your housing cost — rent, or mortgage plus taxes and insurance — alongside other recurring debt payments like auto loans, student loans, and credit card minimums.
Is DTI based on gross or net income?
Gross (pre-tax) income. This is one of the most common mistakes people make when estimating their own ratio — using take-home pay understates your actual DTI.
What DTI do I need to qualify for a mortgage?
It varies by loan program, but many conventional lenders look for 43% or below, with some flexibility for strong credit or a larger down payment. FHA loans sometimes allow higher ratios.
Does my spouse's income count toward DTI?
Only if they're a co-borrower on the loan. If you're applying alone, lenders typically only count your individual income and debts.
Do utility bills count in DTI?
No — DTI only includes debt obligations and housing costs, not variable living expenses like utilities, groceries, or insurance premiums unrelated to housing.
Does checking my own DTI hurt my credit score?
No — calculating your DTI yourself involves no credit check at all. It only becomes relevant to your credit when an actual lender pulls your report during an application.
Can a high DTI still get approved for a loan?
Sometimes, with compensating factors like a large down payment, significant cash reserves, or an excellent credit score — but it generally means fewer loan options and potentially a higher rate.
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