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TPO Kit

DTI and maximum loan calculator for loan officers.

Maximum payment, loan amount and purchase price at the ratios entered, with taxes, insurance, HOA dues and mortgage insurance, checked against the county limit and how it has grown since 2022.

The Borrower

$
Work out income first
$
Minimums from the credit report: cars, cards, student loans.

The Program

%
%

Leave front-end blank for no housing-ratio limit. An AUS approval can go up to 50% back-end.

The Loan and the Home

%
%
%/yr
%/yr
$
A year.
$
Needed for the APR, and to share or save the result.
$
A month.
Add your name to shared results?

Kept in this browser. Your name, NMLS ID and company print on the PDF and travel with links you copy.

TPO KitDTI and Maximum Loan

Your actual rate, payment, and costs could be higher. Get an official Loan Estimate before choosing a loan.

APR counts every closing cost and point as a finance charge unless the lender's fees and points are entered separately.

Estimates from the inputs shown. Not a Loan Estimate or an offer to lend.

TPO Kit · Free calculator · tpostack.comNo sign-up. The math runs in the browser.

Inputs stay in this browser. Usage counts record the tool used and a few rounded figures, such as loan purpose, state and loan-amount band. No names, addresses or exact amounts.

Questions

How is the maximum found?

The largest housing payment is the smaller of income × front-end ratio, and income × back-end ratio minus other debts. Everything in the payment grows with the loan except insurance and HOA dues, so the loan is solved for directly, and the price is the loan divided by the share financed.

How is the APR worked out?

Every closing cost and point you enter counts as a finance charge. Mortgage insurance counts until the balance reaches 78% of the price, or for the full term on FHA and USDA. Copy Share Link and Print or Save PDF stay off until the closing costs are entered.

What does it leave out?

Upfront FHA mortgage insurance, the VA funding fee and the USDA guarantee fee when they're financed: add them to the loan yourself. VA residual income, which can matter more than the ratio. FHA county limits: the limit check and the history cover conforming and high-balance loans. Reserves, credit and property eligibility.

These are estimates from the inputs shown, not a Loan Estimate or an offer to lend.

Origination

Loan origination software for mortgage brokers.

Income, assets, liabilities and the loan amount list each value with its source, who entered it and when.

  • Loan File. The application, fees and documents in one file, from lead to funded.
  • Fee Worksheet. Fees by lettered section, with lender credit, seller concessions and cash to close.
  • Pipeline. Every file by stage, with what is outstanding.