Debt-to-Income Ratio Calculator
Calculate your Front-End (Housing) and Back-End (Total) Debt-to-Income (DTI) ratios. Evaluate your mortgage underwriting eligibility against the 28/36 Rule and download your DTI risk assessment scorecard free.
Gross Monthly Income ($)
Monthly Debt Obligations ($)
Meets standard conventional mortgage underwriting limits.
Quick Answer: What is a Good Debt-to-Income (DTI) Ratio for a Mortgage?
For conventional mortgage approval, the standard benchmark is the 28/36 Rule: your Front-End (Housing) DTI should not exceed 28% of your gross monthly income, and your Back-End (Total Debt) DTI should not exceed 36%. A DTI ratio below 36% signals low financial risk to lenders. However, FHA loans permit DTI ratios up to 43%–50% with compensating factors.
Understanding DTI Underwriting Mechanics: The 28/36 Rule
Mortgage underwriters evaluate two distinct Debt-to-Income metrics to determine borrowing capacity:
- Front-End DTI (Housing Ratio): Calculates the percentage of gross monthly income spent on housing costs (Principal, Interest, Taxes, and Insurance - PITI):
Front-End DTI = Housing Payment / Gross Income. Benchmark limit: ≤28%. - Back-End DTI (Total Debt Ratio): Calculates the percentage of gross monthly income spent on ALL recurring monthly debts (Housing + Auto Loans + Student Loans + Credit Cards Minimums + Personal Loans):
Back-End DTI = Total Monthly Debts / Gross Income. Benchmark limit: ≤36%. - Gross Income Qualification: Includes pre-tax salary, documented bonus/commission, self-employment net profit, and verified rental income.
- Debts Excluded from DTI: Living expenses such as groceries, utilities, health insurance, and cell phone bills are NOT included in DTI calculations.
Lender DTI Qualification Benchmark Matrix
Review standard lender risk tiers for mortgage approval across loan types:
| DTI Risk Tier | Back-End DTI Range | Lender Underwriting Status | Eligible Loan Programs |
|---|---|---|---|
| Excellent | Less than 28% | Prime borrower eligibility; lowest interest rates | Jumbo, Conventional, FHA, VA |
| Good (Ideal) | 28% to 36% | Meets standard 28/36 Rule benchmark | Conventional, FHA, VA, USDA |
| Manageable Risk | 37% to 43% | Qualified Mortgage maximum limit | FHA, VA, Non-Conforming |
| High Risk | Above 43% | High rejection probability; requires compensating factors | FHA (Manual Underwriting with High Reserves) |
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Frequently Asked Questions
Common questions and answers about the Debt-to-Income Ratio Calculator.
What is the difference between Front-End DTI and Back-End DTI?
Front-End DTI calculates the percentage of your gross monthly income that goes strictly toward housing expenses (rent or mortgage PITI). Back-End DTI calculates the percentage of gross income going toward ALL monthly debt obligations (housing + auto loans + student loans + credit cards).
What is the 28/36 Rule in mortgage lending?
The 28/36 Rule is a traditional mortgage underwriting guideline. It recommends spending no more than 28% of your gross monthly income on housing (Front-End DTI) and no more than 36% on total debt payments (Back-End DTI).
What is the maximum DTI ratio for an FHA or conventional mortgage?
Conventional mortgages typically cap Back-End DTI at 36% to 45%. FHA loans allow higher DTI ratios up to 43% (and up to 50% with strong compensating factors like high credit scores or Cash Reserves).
How can I quickly lower my DTI ratio before applying for a mortgage?
You can lower your DTI by paying off high-interest revolving credit card balances, refinancing auto or student loans for lower monthly payments, or adding documented co-borrower income.
Is my salary and personal debt information stored anywhere?
No! RaikTools Debt-to-Income Ratio Calculator operates 100% locally in your browser. None of your income, debt, or financial calculations are ever saved or uploaded to external servers.