What Is a Good Debt-to-Income Ratio? How to Calculate and Improve Yours

Your debt-to-income ratio is the single most important number lenders check after your credit score. Learn how to calculate it, what counts as good (below 36%), what lenders require by loan type, and 6 proven ways to lower it fast.

Your debt-to-income ratio (DTI) is the percentage of your gross monthly income that goes toward paying debts. It is the single most important number lenders check after your credit score — it determines whether you qualify for a mortgage, auto loan, or personal loan, and at what interest rate. A good DTI is generally below 36%. A DTI above 50% makes it difficult to qualify for most new credit.

How to calculate your debt-to-income ratio

The formula is straightforward:

DTI = (Total monthly debt payments ÷ Gross monthly income) × 100

Gross monthly income is your income before taxes and deductions. Monthly debt payments include all recurring debt obligations — mortgage or rent, car loans, student loans, personal loans, minimum credit card payments, child support, and alimony. It does not include utilities, groceries, insurance premiums, or subscriptions.

Example: if your gross monthly income is $6,000 and your monthly debt payments total $1,800 (mortgage $1,200 + car loan $350 + student loan $250), your DTI is ($1,800 ÷ $6,000) × 100 = 30%.

What is a good debt-to-income ratio?

DTI range	Rating	What it means for borrowing
Below 20%	Excellent	Strongest loan terms, best rates, highest approval likelihood
20–35%	Good	Comfortable range — most lenders approve with no concern
36–43%	Acceptable	Eligible for most loans; some lenders apply stricter scrutiny
44–50%	High	Limits loan options; higher rates; FHA ceiling is 43–50%
Above 50%	Very high	Most conventional lenders will decline; severely limits new credit

Front-end vs back-end DTI: what lenders actually check

Mortgage lenders calculate two DTI figures, not one:

Front-end DTI (housing ratio): the percentage of gross income going toward housing costs only — principal, interest, property taxes, and insurance (PITI). Conventional lenders prefer this below 28%.
Back-end DTI (total DTI): all monthly debt payments including housing. This is the number most lenders cite when they say "DTI limit." Conventional loans typically require back-end DTI below 43–45%.

When someone asks "what is a good DTI for a mortgage?" they almost always mean the back-end figure. The 28/36 rule is the traditional guideline: housing costs below 28% of gross income, total debt below 36%.

Front-end vs back-end DTI calculated on $6,000 gross monthly income

DTI requirements by loan type

Loan type	Maximum DTI	Notes
Conventional mortgage	43–45%	Fannie Mae and Freddie Mac guidelines; some lenders allow up to 50%
FHA loan	43–50%	More lenient; 50% allowed with compensating factors
VA loan	41%	Guideline, not hard cap; residual income rule also applies
USDA loan	41%	41% back-end; 29% front-end guideline
Personal loan	35–40%	Varies by lender; some online lenders go to 50%
Auto loan	45–50%	Lenders focus more on credit score than DTI for auto loans
Credit card	No hard limit	DTI considered but credit score and income weigh more heavily

Why lenders care about DTI more than net worth

A lender's primary concern is not how much you own — it is whether you can make the next payment. DTI measures cash flow, not wealth. A borrower with $500,000 in investments and a 55% DTI presents more payment risk than a borrower with $20,000 in savings and a 25% DTI, because the high-DTI borrower is already directing more than half their income to debt service.

Net worth matters for secured lending (the asset backing the loan) and for compensating factors. But for unsecured personal loans and income-based mortgage underwriting, DTI is the dominant cash-flow metric.

6 ways to lower your debt-to-income ratio

DTI can only improve two ways: increase income or decrease debt payments. Every strategy below works through one of these two levers.

Pay down high-balance revolving debt first. Credit card minimum payments are a significant DTI drag relative to balance. Paying off a $4,000 credit card balance eliminates a $120/month minimum payment — improving DTI by 2 full percentage points on a $6,000/month income.
Avoid taking on new debt before applying for a loan. New auto loans, personal loans, or credit card minimum payments all increase DTI. Postpone any non-essential new credit for at least 3–6 months before a major loan application.
Refinance existing loans to lower payments. Extending the term of an auto loan or personal loan reduces the monthly payment, reducing DTI — even if total interest paid increases. This is a valid short-term tactic specifically for qualifying for a mortgage.
Increase gross income with documented side income. Lenders typically require 2 years of tax returns to count self-employment or freelance income. If you have verifiable additional income, including it in your gross income calculation directly reduces your DTI percentage.
Apply with a co-borrower. Adding a co-borrower with income and no debt combines both incomes in the DTI calculation, lowering the ratio.
Make a larger down payment. On a mortgage, a larger down payment reduces the loan amount, reducing the monthly principal-and-interest payment, which reduces both front-end and back-end DTI.

DTI vs credit score: which matters more?

Both matter, but they measure different things. Credit score measures thehistory of how you have managed debt — payment reliability, credit utilisation, account age. DTI measures your current capacity to take on additional debt payments given your existing obligations and income.

Lenders typically screen credit score first (to filter for credit risk) and DTI second (to verify payment capacity). A high credit score does not overcome a DTI above 50% for most conventional mortgage products. Similarly, a low DTI does not overcome a credit score below 580 for most lenders.

For mortgage applications specifically, DTI is often the binding constraint for higher-income borrowers who have successfully managed credit but carry significant student loan or car loan obligations relative to their income.

How to calculate your DTI before applying for a mortgage

Run these five steps before submitting any mortgage application:

List all monthly debt payments: mortgage/rent, car loans, student loans, personal loans, minimum credit card payments, child support, alimony.
Add the estimated new mortgage payment (principal, interest, taxes, insurance) to the list using a mortgage calculator.
Sum all payments. Divide by gross monthly income. Multiply by 100.
If the result exceeds 43%, identify which debts to pay down before applying.
Check both the front-end ratio (housing only ÷ income) and the back-end ratio (all debt ÷ income). Both should be within lender guidelines.

Official references and further reading

These three sources are the authoritative references for DTI requirements, mortgage qualification standards, and consumer credit guidance.

Consumer Financial Protection Bureau — Debt-to-Income Ratio Explained — The CFPB's official guide to calculating DTI, what counts as debt, and how lenders use it for mortgage qualification decisions.
Fannie Mae Selling Guide — Debt-to-Income Ratios — The official Fannie Mae underwriting guidelines for maximum DTI on conventional conforming mortgages, including compensating factors.
HUD.gov — FHA Loan Requirements and DTI Limits — The U.S. Department of Housing and Urban Development's official guidance on FHA loan DTI allowances, including the 43–50% back-end threshold with compensating factors.

Key takeaways

DTI = total monthly debt payments ÷ gross monthly income × 100.
Below 36% is good; below 20% is excellent. Above 50% makes most loans very difficult to obtain.
Mortgage lenders check both front-end DTI (housing costs only) and back-end DTI (all debts). The 28/36 rule is the traditional guideline.
DTI measures payment capacity; credit score measures payment history. Both matter for loan approval.
The fastest ways to lower DTI: pay off revolving balances, avoid new debt before applying, and consider a co-borrower.

Frequently asked questions

Does DTI affect my credit score?

No — DTI is not calculated from credit bureau data and does not appear on your credit report. It is calculated by lenders from your self-reported income and the debt payments visible on your credit report. However, the underlying debts that create a high DTI (high credit card balances, multiple loans) do affect your credit utilisation ratio and payment history, which directly influence your score.

What counts as debt in the DTI calculation?

Monthly payments on: mortgage or rent, car loans, student loans, personal loans, home equity loans or HELOCs, minimum credit card payments, child support, and alimony. What does not count: utilities, groceries, insurance premiums, phone bills, subscriptions, gym memberships, or any non-debt living expense. Medical debt in collections may also be included depending on the lender and loan type.

Can I get a mortgage with a 50% DTI?

Yes, in specific circumstances. FHA loans allow back-end DTI up to 50% with compensating factors — strong credit score (720+), significant cash reserves, or a larger down payment. Some conventional lenders also allow up to 50% with compensating factors. Fannie Mae's automated underwriting (DU) can approve up to 50% DTI for well-qualified borrowers. Above 50%, options narrow significantly to portfolio lenders and non-QM mortgages, typically at higher rates.

Do lenders use gross or net income for DTI?

Gross income — your income before taxes and deductions. This is consistent across all major loan types (conventional, FHA, VA, USDA, personal loans). Self-employed borrowers use net income after business expenses as reported on their tax returns, which lenders average over the most recent two years.

How quickly can I improve my DTI?

DTI can improve immediately if you pay off a debt entirely — the monthly payment disappears from the calculation the month after the account is closed or paid to zero. Making extra payments reduces the balance but not the minimum payment until you pay the debt off entirely. The fastest DTI improvements come from eliminating entire monthly obligations, not from gradually reducing balances.