Gypes

Monthly debt capacity

Debt-to-income ratio calculator

Calculate current DTI, then model a genuinely new debt payment or replace an existing housing payment without counting both.

Use gross income before deductions and required monthly payments from current statements. The workflow separates today’s obligations from a proposed scenario and never assumes one universal approval limit.

1Start with gross income

Enter documented annual income before income taxes, payroll deductions, retirement contributions, or benefit deductions. The calculator converts it to a monthly amount.

2Enter the current housing obligation

For a mortgage comparison, use the complete required housing payment rather than principal and interest alone.

3Add other current required debts

Use recurring required payments—not account balances and not voluntary extra principal. Program-specific inclusion rules can differ.

4Choose the comparison

A home purchase commonly replaces the current housing payment. A new auto, personal, or other debt payment is normally added. Choose the treatment that matches the scenario.

No proposed payment will be included; the result will describe current obligations only.

Optional planning checkpoint

Start with the exact DTI question

Debt-to-income ratio is simple division, but an answer can still be wrong when the numerator mixes current obligations with a proposed payment incorrectly. First decide whether you need a current snapshot, a new non-housing debt scenario, or a replacement housing scenario. The calculator keeps those questions separate before it shows a percentage.

The Consumer Financial Protection Bureau defines debt-to-income ratio as all monthly debt payments divided by gross monthly income. The entered income on this page is annual, so the model divides it by twelve. It then sums the monthly obligations selected for the current or proposed path and multiplies the resulting ratio by one hundred.

Use gross income, not take-home pay

Gross income is income before taxes and other deductions. A $90,000 annual gross income becomes $7,500 per month for this arithmetic. Do not enter a monthly number in the annual field. Do not use take-home pay unless the specific analysis explicitly calls for it, because dividing monthly debts by a net figure produces a different ratio from the commonly stated DTI measure.

A lender may not accept every dollar entered. Income can require documentation, a history of receipt, evidence that it is likely to continue, or a program-specific calculation when earnings are variable, seasonal, commissioned, self-employed, or derived from assets. The calculator does not verify employment, tax returns, pay statements, business income, support income, or any other source. It reports arithmetic based on the amount supplied.

Current housing must be a complete obligation

For mortgage planning, principal and interest alone can understate housing expense. The CFPB explains that a total monthly mortgage payment commonly includes property taxes, homeowners insurance, and possibly mortgage insurance in addition to principal and interest. Association dues and costs paid outside escrow can also remain real monthly housing obligations.

Fannie Mae’s current selling guide describes monthly housing expense for a subject property as including applicable principal and interest, property and other required insurance, real estate taxes, mortgage insurance, association dues, assessments, ground rent, and subordinate financing. That is an underwriting rule for that program, not a universal consumer definition, but it demonstrates why a principal-and-interest quote by itself is often not the correct housing input.

Use a current statement for an existing mortgage or rent obligation. For a proposed mortgage, use the complete payment from a transaction-specific estimate when available. The CFPB’s Loan Estimate explainer distinguishes monthly principal and interest from Estimated Total Monthly Payment and advises checking taxes, insurance, mortgage insurance, and other assessments.

Enter payments, not balances or ordinary expenses

Credit card debt belongs in DTI as a required monthly payment, not as the entire outstanding balance. The same distinction applies to auto, student, personal, lease, and other installment obligations. Enter the recurring payment counted for the question. Do not enter a $20,000 auto balance where the form asks for a $475 monthly payment.

Ordinary groceries, utilities, fuel, child care, medical spending, savings goals, and similar household costs are not placed in this simplified debt numerator. That does not make them optional in real life. It means DTI is not a complete household budget. Use the monthly budget calculator to test take-home cash flow separately.

Debt inclusion is not identical across every lender and program. Fannie Mae’s monthly debt obligations guidance, for example, addresses revolving accounts, leases, installment debts, student loans, support obligations, tax installment agreements, debts paid by others, and numerous exceptions. A calculator cannot determine which exception applies from six numbers. Confirm the treatment with the relevant lender or written program rule.

Add a new payment or replace current housing—do not do both accidentally

A proposed auto loan, personal loan, or other genuinely new non-housing obligation is added to the current housing and other debts. If current debts total $2,000 and the new payment is $500, the modeled scenario numerator is $2,500.

A home purchase often has different arithmetic. When the new home payment replaces the housing payment already entered, adding both can substantially overstate the proposed DTI. The replacement path removes current housing from the numerator, preserves the entered non-housing debts, and inserts the complete proposed housing payment. If the person will retain the current property and its obligation, however, replacement is not the right assumption. Select the added-payment path or use the lender’s treatment.

The structured output shows the current numerator and scenario numerator side by side. It also reports the monthly debt change and percentage-point DTI change. This makes the treatment visible instead of hiding it inside one final percentage.

Housing ratio and total DTI are separate diagnostics

The housing ratio divides only the modeled housing payment by gross monthly income. Total DTI divides housing plus all other included monthly debts by gross monthly income. A current-only or new non-housing scenario leaves the housing ratio unchanged. A replacement-housing scenario recalculates it using the proposed complete housing payment.

These ratios describe different parts of the same scenario. A low housing ratio can coexist with a much higher total DTI when card, auto, student, support, or other obligations are substantial. Conversely, a person with little non-housing debt may see the two percentages much closer together. The result does not label either one approved, denied, safe, or unaffordable.

There is no universal DTI approval cutoff

The CFPB’s basic DTI explanation says different loan products and lenders use different limits. Current Regulation Z mortgage commentary also states that the ability-to-repay provision does not prescribe one specific monthly DTI ratio for creditors. A creditor may consider DTI or residual income under its standards, document thresholds and exceptions, and consider additional factors relevant to repayment ability.

Older articles and search results frequently present 43 percent as if it were a permanent limit for every mortgage. That is not a safe universal assumption. The CFPB’s current qualified-mortgage overview says a lender must consider and verify income or assets and debts and must consider either DTI or residual income; it does not turn this calculator into an underwriting system.

The optional checkpoint therefore starts blank. If a lender, housing counselor, personal plan, or written program has supplied a percentage, enter it only as a comparison reference. The output converts that percentage to a mathematical total-debt amount and shows the scenario’s distance from it. Gypes does not preselect 36 percent, 43 percent, 50 percent, or any other number.

Residual gross income is not spendable cash

The result subtracts modeled debts from gross monthly income because the remaining dollar amount helps explain the ratio. That remainder is before federal, state, and local taxes; Social Security and Medicare withholding; insurance; retirement contributions; child care; food; utilities; transportation; maintenance; health costs; savings; and irregular expenses. It is not take-home pay, discretionary income, or a safe new payment.

Current mortgage ability-to-repay commentary recognizes residual income as a relevant alternative measure, but a creditor’s verified residual-income analysis is not the simple gross remainder displayed here. Treat the number as a transparency check on the DTI numerator, then build a real cash-flow budget using net income and actual household expenses.

A document-first workflow for using the result

  1. Gather recent income evidence and statements for every current recurring debt.
  2. Enter annual gross income and complete current housing expense.
  3. Enter required card minimums, installment or lease payments, and other obligations supported by documents.
  4. Choose current only, add a genuinely new payment, or replace current housing.
  5. For a mortgage scenario, copy the complete proposed housing payment rather than principal and interest alone.
  6. Use a checkpoint only when its source and purpose are known.
  7. Compare the result with a take-home-pay budget, cash reserves, closing cash, loan terms, and other underwriting factors.

If a lender calculates a different ratio, ask which income amount, housing components, debts, and program rules it used. The difference may be classification or verification rather than a math error. Update this page rather than forcing the lender’s answer into the wrong inputs.

Official references used for this workflow

This calculator provides educational arithmetic, not lending, mortgage, underwriting, financial, tax, housing, or legal advice. It is not a loan approval, offer, eligibility determination, or complete affordability analysis. Confirm qualifying income, included obligations, proposed payment treatment, and program rules with the relevant lender or qualified professional.