Finance category

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Payment-to-Income Ratio Calculator

Compute the classic front-end (housing only) and back-end (total debt) payment-to-income ratios. Compare against your target — the 28/36 rule is the conservative budgeting guide.

Gross monthly income

PITI (housing payment)

Other monthly debts

Front-end target %

Back-end target %

Front-end (housing) ratio

30.0%

target: 28%

Back-end (total debt) ratio

35.9%

target: 36%

Max housing at target

$3,220

lower of front/back constraint

Housing headroom

-$230

over budget

28/36 rule

The classic 28/36 rule says housing costs (PITI) should stay under 28% of gross income, and total debts (housing + everything else) under 36%. Lenders today often allow up to 50% back-end DTI on conventional loans, but the conservative ratio is the safer planning target.

Front-end vs back-end: front-end ratio is housing alone. Back-end adds car loans, student loans, credit card minimums, and other recurring debt obligations.

Editorial noteMaintained by EveryCalc - Reviewed June 2026

EveryCalc calculators are designed for fast, practical estimates with transparent inputs and no required account. We use plain formulas, visible assumptions, and related tools so visitors can check the result from more than one angle.

Results are informational only. For financial, tax, legal, medical, construction, or other high-impact decisions, verify the output against primary sources or a qualified professional.

Learn more about our review process on the EveryCalc methodology page.

How this calculator works

What this page estimates

This Payment-to-Income Ratio Calculator is built to give a quick, browser-based estimate for payment-to-income ratio. Compute the classic front-end (housing only) and back-end (total debt) payment-to-income ratios. Compare against your target — the 28/36 rule is the conservative budgeting guide. The inputs stay on the page during normal use, and the result should be treated as an estimate for planning, comparison, or education rather than professional advice.

Calculation approach

The calculator applies the standard relationship implied by the inputs, then formats the answer so it can be checked and reused. For finance tools, the most important step is using consistent units, rates, time periods, and assumptions before comparing the result with another calculator or outside quote.

Example workflow

For example, start with a realistic value you already know, change one input at a time, and watch how the answer moves. That makes it easier to tell whether the result is being driven by the main amount, the rate, the time period, or a unit conversion.

Practical checks

Use current, real-world numbers when the result affects money, health, tax, or legal decisions.
Run a low, base, and high case when the inputs are estimates.
Check the related calculators below when the next decision depends on a different assumption.

How to interpret the payment-to-income ratio result

Best use

Use the result as a planning number for comparing payments, rates, returns, tax reserves, or cash-flow choices before you request a quote or make a commitment.

Cross-check

Compare the answer with the contract, lender estimate, tax form, brokerage statement, payroll record, or invoice that will control the real-world outcome.

Watch for

Do not rely on a single optimistic rate, return, or fee assumption. Money pages work best when you run low, base, and high cases and keep professional advice separate from the estimate.

This page belongs to the Finance calculator library, so the answer should be read in the context of the decision you are modeling rather than as a universal rule.

Before relying on this payment-to-income ratio estimate

Most calculator mistakes come from the inputs, not the arithmetic. Use this short audit before you reuse the answer in a spreadsheet, quote, application, or important conversation.

Confirm source numbers

Match balances, rates, fees, taxes, income, and payment dates against the lender quote, payroll record, tax form, statement, invoice, or contract.

Separate cash flow from total cost

A lower monthly payment can still cost more over time if fees, interest, taxes, or a longer term are hidden in the structure.

Run conservative cases

Test at least one higher-cost or lower-return case before using the output for a purchase, refinance, investment, loan, or tax decision.

Rerun this page when the rate, price, term, fee, tax rule, income, expense, or expected holding period changes.

How to Use

Enter gross monthly income.
Enter your full PITI (principal + interest + taxes + insurance + HOA + MI).
Enter other monthly debts (car, student loan, credit card minimums).
Set your front-end and back-end targets — 28/36 is conservative; lenders often allow higher.
Read both ratios and the headroom available within targets.

Frequently Asked Questions

What's the 28/36 rule?

Housing costs (PITI) under 28% of gross income; total debts under 36%. Originated as bank-conservative underwriting in the mid-20th century and still useful as a personal budget rule of thumb.

What DTI do lenders actually allow?

Conventional: up to 50% back-end on stronger files (DU/LP-approved). FHA: up to 56.99% with compensating factors. VA: residual income test, no hard DTI cap. The 28/36 is conservative target, not lender max.

Why use front-end and back-end ratios?

Front-end isolates housing burden. Back-end captures total debt load. Both matter — a borrower with low housing but huge car loans is a different risk than one with high housing but no other debt.

Should I use net or gross income?

Lenders use gross (pre-tax, pre-deduction) for DTI. For your own planning, the same rule on net income gives a more honest budget picture — your actual take-home determines what bills you can pay.