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Payment and qualifying calculator

Most mortgage calculators give you principal and interest and stop. That figure is not your payment and it is not what qualifies you. This one includes taxes, insurance, HOA dues, and Mello-Roos, then shows you the debt-to-income ratios an underwriter actually reads.

The purchase
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This field is deliberately empty. Nothing on this site quotes a rate, because a rate quoted without knowing your credit, loan to value, occupancy, and property type is a marketing number. Enter one you have been given, or one you want to test.

The rest of the payment
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California base is one percent plus voter approved local bonds. Los Angeles County commonly lands near this figure, but it varies by parcel. Check the actual rate for a specific address.

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Common across newer Santa Clarita Valley development and frequently left out of budgets entirely. It counts against your qualifying ratios exactly the way taxes and HOA dues do.

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Qualifying, optional

Fill these two in and the panel adds your debt-to-income ratios, which is the part that decides the file.

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Car loans, student loans, minimum credit card payments, personal loans, and child support or alimony. Not utilities, insurance, groceries, or phone bills. Underwriting counts what appears on your credit report.

Waiting on a rate

Enter an interest rate on the left and the full payment breakdown appears here.

Everything above runs in your browser. Nothing you type is sent to this site or anywhere else.

What this leaves out

The honest limits of any calculator.

  • Closing costs and prepaid escrows, which are cash you need at closing and are separate from the monthly payment entirely.
  • Credit. Two borrowers with identical income and identical purchase prices can receive materially different pricing based on credit score and loan to value.
  • Reserves. Many programs, jumbo especially, require a defined number of months of payments in verified assets after closing.
  • Income calculation. Self-employment, bonus, commission, overtime, and rental income each get calculated by specific rules that rarely match what you would assume.
  • Automated underwriting. The actual decision weighs credit history, employment stability, property type, and occupancy alongside the ratios.

Common questions

What is debt-to-income ratio and why does it matter more than the payment?

Debt-to-income ratio is your total monthly debt obligations divided by your gross monthly income. Underwriting decisions turn on it far more often than on the payment amount itself. A payment you can comfortably afford in practice can still fail a ratio test, and a ratio that passes is what actually produces an approval. The back-end ratio, which includes the new housing payment plus car loans, student loans, credit card minimums, and any other reported debt, is the figure that matters most.

What is Mello-Roos and why does this calculator ask about it?

Mello-Roos is a special assessment levied by a Community Facilities District to fund infrastructure, and it is common across newer development in the Santa Clarita Valley. It is billed with your property taxes but it is not part of the base tax rate, so a calculator that only applies a tax percentage will understate your real payment. It also counts in your housing expense for qualifying purposes, which means it directly reduces how much home you qualify for.

Does this calculator tell me whether I will be approved?

No. It models a payment and shows where the resulting ratios land. Approval decisions are made by the wholesale lender underwriting the file, against that lender guidelines, using verified income and a credit report. Automated underwriting also weighs credit history, reserves, employment stability, and property type, none of which this tool sees.

Run your actual numbers instead.

A calculator models a scenario. Fifteen minutes on the phone tells you what your income actually calculates to, what the ratios really look like, and which programs are in play. That is a more useful answer than any tool produces.

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