Mortgage Qualification Calculator

Estimate the maximum home price you can qualify for using your income, debts, interest rate, and chosen loan program.

Mortgage Qualification Inputs

Find the maximum home price your income and debts support

Monthly Income

Existing Monthly Debts

Cards, auto, student, etc.

Interest Rate

Loan Term

years

Down Payment

Property Tax Rate

% / yr

Typical U.S. range 0.5%–2%

Insurance Rate

% / yr

0.35%–0.75% is common

Monthly HOA

Loan Program

What Is the Debt-to-Income Ratio?

Debt-to-income ratio (DTI) is the percentage of your gross monthly income that goes to recurring debt payments — housing, credit cards, auto loans, student loans, personal loans, and court-ordered support. It is the single most important number a mortgage underwriter checks after credit score. Lenders use two flavors: front-end DTI (housing payment ÷ gross income) and back-end DTI (all monthly debt ÷ gross income). The conforming-loan ceiling is 43% back-end; the comfort zone is below 36%.

This page bundles three tools. The default tab calculates your DTI and predicts approval odds across Conventional, FHA, VA, USDA, and Jumbo loan programs. The Mortgage Qualification tab back-solves the maximum home price your DTI supports. The Debt Reduction Planner shows how extra monthly payments shorten the path back into conforming territory. Pair with our House Affordability Calculator and Mortgage Calculator for end-to-end home-buying analysis.

How DTI Works

Gross income — not take-home

DTI uses gross monthly income (before tax and withholding). Net-of-tax pay is irrelevant to the underwriter because tax withholding is highly individual.

Recurring debt only

Utilities, groceries, gas, subscriptions, and discretionary spending are not part of DTI. Only contractual recurring obligations count: rent, mortgage, minimum credit-card payments, installment loans, and court-ordered support.

Front-end vs back-end

Front-end is housing only; back-end adds every other monthly obligation. Some loan programs (FHA, VA, USDA) gate on both; conventional mostly gates on back-end with the 28% front-end as a soft guideline.

Underwriter haircuts

Variable income (commission, self-employment, rental) is averaged across 24 months and discounted. Bonus and overtime usually need a 2-year history. Investment income must be likely to continue 3+ years.

Six Ways to Use This DTI Calculator

Pre-qualify before applying

Get a private read on whether your DTI is mortgage-ready before pulling credit and triggering hard inquiries.

Pick the right loan program

Conventional, FHA, VA, USDA, and Jumbo each have different DTI ceilings — the approval grid shows which match your numbers.

Back-solve home price

Use the Mortgage Qualification tab to convert your DTI ceiling into a hard maximum home price you can responsibly afford.

Plan a debt-payoff push

The Debt Reduction Planner shows exactly how many months of extra payments move you from a 'High Risk' DTI back into the conforming zone.

Stress-test a job change

Swap income to a lower or higher figure and watch the approval probability shift — useful before walking away from a salary.

Compare avalanche vs snowball

Toggle the strategy in the Debt Planner to see which payoff method gets you debt-free faster for your specific debt mix.

Best Practices to Improve Your DTI

Lowering DTI is mechanical: cut monthly obligations, raise qualifying income, or do both. The highest-leverage move for most households is eliminating revolving credit-card balances — minimum payments are a fixed monthly drag with no offsetting asset. Installment debt is next: a paid-off auto loan often removes $300–$500 from the back-end calculation in one stroke.

On the income side, document every legitimate source. A side business with 24 months of tax returns counts. Rental income with a signed lease counts at 75% (the underwriter's vacancy assumption). Bonus and overtime count with a 2-year history. A spouse's income can transform a marginal application — even if the spouse doesn't appear on the loan.

Avoid the trap of timing-sensitive moves: opening or closing credit cards in the 90 days before applying changes your minimum payments and your credit score, both of which the underwriter re-runs. Pay balances down to under 30% utilization, do not close old accounts, and freeze new applications until after closing.

Why DTI Matters

The 43% conforming ceiling

Fannie Mae and Freddie Mac purchase conforming loans up to 50% back-end DTI, but most lenders draw the line at 43% as their general approval target. Above 43% you need compensating factors (large reserves, 720+ credit, big down payment).

Rate pricing tiers

Even when approved, DTIs in the 40–45% range often price at a 0.125–0.250% rate premium versus DTIs under 36%. On a $400,000 loan that's $30K+ over the life of the mortgage.

Compensating-factor math

If your DTI is in the borderline zone, lenders look for reasons to say yes: 6+ months of PITI in reserves, 20%+ down, 740+ credit, two years stable employment in the same field. Each adds slack to the DTI ceiling.

Beyond mortgages

DTI also drives auto-loan approval tiers, student-loan refinance eligibility, and small-business lending. Keeping it under 36% gives you the broadest set of options across every credit product.

Where DTI Calculations Get Tricky

Self-employment income

Underwriters use the two-year average of your AGI (Schedule C net profit, K-1 distributions, S-corp wages). Tax write-offs that reduce taxable income also reduce qualifying income — sometimes dramatically.

Student loans on IDR plans

Even if you pay $0 under an income-driven repayment plan, FHA and VA may still use a calculated payment (0.5%–1% of balance). Conventional uses the actual IDR amount documented on a statement.

Co-signed debts

If you co-signed a loan for a family member, that payment usually counts against your DTI unless you can document 12 months of payments by someone other than you.

Rental income limits

Rental income is counted at 75% to account for vacancy and maintenance. New rentals (no two-year history) usually can't be counted at all.

The Core DTI Formulas

Gross Monthly Income

GMI = Σ (Source × Periods per Month)

Weekly × 4.333, biweekly × 2.167, monthly × 1, quarterly ÷ 3, annual ÷ 12. Sum every qualifying source.

Housing Expense

Housing = Rent or Mortgage + Tax + HOA + Insurance

Front-end DTI uses this. PMI is included if your down payment is under 20%.

Total Monthly Debt

Debt = Housing + Σ (Credit, Loans, Support)

Adds every contractual monthly obligation — minimum payments only for revolving credit.

Front-End DTI

Front DTI = Housing ÷ GMI

The 28% guideline is for conventional; FHA allows 31%, USDA 29%, VA 41%.

Back-End DTI

Back DTI = Total Debt ÷ GMI

The 43% ceiling is the conforming-loan limit; below 36% is the comfort zone.

Maximum Affordable Payment

Max Housing = (Target DTI × GMI) − Other Debts

Subtract existing non-housing debt from your DTI ceiling to see what's left for a mortgage.

Common DTI Calculation Mistakes

1
Using net pay instead of gross
DTI is calculated against gross income. Using take-home pay overstates your ratio and makes you look unqualified when you actually qualify.
2
Forgetting taxes, insurance, and HOA
PITI is the underwriter's reference — not just principal and interest. Leaving out property tax, insurance, and HOA understates your housing payment by 25%+ in high-tax states.
3
Adding revolving credit balances instead of minimums
Only the minimum payment counts toward DTI. A $10,000 credit-card balance with a $250 minimum adds $250 to monthly debt, not $10,000.
4
Ignoring co-signed debt
A co-signed auto loan or student loan generally counts against your DTI unless you have 12 months of payment history showing someone else pays.
5
Counting unqualified income
Cash gifts, one-time bonuses, irregular freelance work without 2-year history, and unreported income all fail to qualify. Stick to documentable sources.
6
Skipping the front-end check
Some borrowers focus only on the 43% back-end ceiling and forget that VA, FHA, and USDA also enforce a front-end limit. Run both ratios.

Built using Fannie Mae, Freddie Mac, FHA, VA, and USDA underwriting guidelines. DTI is one of several factors lenders evaluate — review our methodology and editorial policy for the full sourcing and review process.

Frequently Asked Questions

Debt-to-income (DTI) ratio is the percentage of your gross monthly income that goes to recurring debt payments — housing, credit-card minimums, auto loans, student loans, personal loans, and court-ordered support. Lenders use it to gauge whether you can absorb a new payment on top of existing obligations. There are two flavors: front-end DTI (just housing ÷ income) and back-end DTI (total debt ÷ income), and the back-end ratio is the one most underwriters anchor approval decisions on.

Under 36% back-end DTI is universally treated as a strong number — every conforming loan program approves at standard pricing, FHA and VA approve readily, and most personal credit products are easy to access. The 36%–43% range still works for mortgages but rate pricing is less competitive. Above 43% you need compensating factors (large down payment, 6+ months of reserves, 720+ credit score) for conventional approval, and many lenders simply decline.

Front-end DTI counts only your monthly housing payment — rent, or the full PITI (principal + interest + taxes + insurance) plus HOA dues — divided by your gross monthly income. Back-end DTI adds every other recurring debt obligation: credit-card minimums, auto loans, student loans, personal loans, and court-ordered child support or alimony. Both ratios use gross income, not take-home pay. Conventional loans usually anchor on back-end; FHA, VA, and USDA enforce both ratios.

Mortgage lenders prefer back-end DTI below 36% and front-end DTI below 28% — the classic 28/36 rule. FHA stretches to 31/43 (31% front / 43% back) with compensating factors up to 50% back-end. VA emphasizes residual income but enforces a 41% guideline. USDA caps at 29/41. Jumbo lenders are stricter than conforming, typically requiring under 43% back-end with cleaner credit and bigger reserves. The calculator's Lender Approval Analysis runs all five programs against your numbers in one shot.

Yes — rent is the front-end housing payment when you don't own a home, and it counts in both the front-end and back-end DTI. The exception is the qualifying ratio for a purchase mortgage: at that point the underwriter swaps your current rent out and the proposed mortgage PITI in. Some lenders also use "payment shock" — the increase from your current rent to your proposed mortgage payment — as a separate qualifying check.

Three levers: (1) pay down revolving debt to lower minimum payments (credit cards give the biggest DTI improvement per dollar paid because their minimums are a fixed monthly drag); (2) eliminate installment debt with small balances or high payments first (an auto loan paid off six months early can remove $400+ from monthly debt); (3) document additional qualifying income (rental, bonus, side business, spouse's income if joint application). Use the Debt Reduction Planner tab to model the exact payoff timeline and DTI trajectory for your debt mix.

Yes, but with limits. FHA loans accept up to 50% back-end DTI with strong compensating factors (FICO ≥ 580, 6+ months PITI reserves, low loan-to-value). VA loans focus on residual income — if your residual is well above the regional minimum, DTI above 41% is forgivable. Conventional loans can go to 50% back-end DTI under Fannie/Freddie automated underwriting, but pricing tiers worsen materially above 43%. Jumbo loans almost always require under 43% back-end. The calculator's per-program approval grid reflects current 2026 industry guidelines.

Directly, no — FICO does not include DTI in its scoring model because it doesn't see your income. Indirectly, the underlying behaviors that drive high DTI (revolving credit utilization, late payments, opening multiple new accounts) absolutely affect credit score. Lowering DTI by paying down credit-card balances usually raises FICO at the same time because utilization drops. So the two metrics tend to move together, even though they're computed from different inputs.

Recurring contractual obligations: rent or mortgage PITI plus HOA, credit-card minimum payments, auto loan or lease, student loan (actual payment or IDR-adjusted), personal loans, court-ordered child support and alimony paid, and any co-signed loans without 12-month payment history from another payer. Not counted: utilities, groceries, gas, subscriptions, gym memberships, insurance premiums for non-housing items, taxes withheld from paychecks, and discretionary spending.

Recalculate before any major credit application — mortgage, auto loan, business loan, student loan refinance — and any time your income or debt mix changes meaningfully. For people working toward a home purchase, monthly DTI checks during the final 6–12 months are useful: opening a new credit card, financing furniture, or taking out a new auto loan in the months before applying can quietly push you out of the conforming zone. Save the printable report to track your trajectory.