Maximum Mortgage Calculator
Find the largest mortgage and home price you can qualify for based on your income, debts and a lender’s debt-to-income limit.
How the maximum mortgage calculator works
This tool finds the ceiling — the single largest mortgage, and the home price behind it, that a lender's debt-to-income rules will allow you to carry. It takes your gross income, subtracts the monthly debt payments already on your record, and reserves what remains up to the back-end DTI cap for a full housing payment.
From that housing payment it strips out the estimated taxes, insurance, and HOA, since those count against the limit too, leaving the slice available for principal and interest. That P&I figure is then run backward through the loan formula at your rate and term to size the maximum balance.
Worked example: with gross monthly income of $7,000, other monthly debt payments of $600 and max debt-to-income ratio of 43.00%, the maximum mortgage calculator shows maximum home price of $352,190.
- Affordable payment (P&I)
- $1,960.00
- Maximum loan
- $302,190
- Maximum home price
- $352,190
- DTI used
- 43%
| Gross monthly income | Maximum home price |
|---|---|
| $5,000 | $219,597 |
| $7,000 | $352,190 |
| $10,000 | $551,081 |
| $15,000 | $882,565 |
The formula
Maximum P&I = (gross monthly income × DTI cap) − existing debts − taxes − insurance − HOA. The largest loan that produces that payment is L = PMI × [1 − (1 + r)^−n] / r, with r the monthly interest rate and n the total payments. Maximum home price = L + down payment.
- Assumes a single DTI cap you supply; real approvals vary the limit by program, credit tier, and compensating factors like reserves.
- Taxes and insurance are estimates — escrow figures differ by county, property value, and coverage, and directly reduce the qualifying loan.
- The maximum loan still depends on the appraisal supporting the price and on loan-limit ceilings for conforming, FHA, or jumbo financing.
- Rate shown is assumed fixed; an adjustable rate qualifies differently and can be underwritten at a higher stressed payment.
- Qualifying for the maximum and being comfortable at it are separate questions — leave margin for rate, tax, and insurance increases.
Results are estimates for educational purposes and are not financial advice. Confirm exact figures with your lender or a licensed advisor.
Questions about the maximum mortgage calculator
Why do taxes and insurance lower the maximum mortgage I qualify for?
Lenders cap your total housing payment — principal, interest, taxes, insurance, and HOA together — against your income. Every dollar of estimated tax or insurance fills part of that cap, leaving fewer dollars for principal and interest.
Since the loan size is driven only by the P&I portion, higher escrow costs shrink the balance you can borrow.
How does the loan term change my maximum?
A longer term spreads the same balance over more payments, so each payment is smaller and a given housing budget supports a larger loan.
A 30-year term therefore yields a higher maximum than a 15-year one at the same rate — though you pay far more interest over the life of the loan to get there.
Is the maximum the same at every lender?
No. Lenders set their own DTI ceilings, price rate differently for your credit profile, and weigh reserves, employment history, and down payment as compensating factors. One may stop at 43 percent total debt while another stretches to 50 with strong savings. The maximum here is a well-grounded estimate, not a guaranteed approval figure.
Is the Maximum Mortgage Calculator free to use?
Yes. Every calculator on MortgageLoansCalculator is completely free, with no sign-up, login or paywall. Run as many scenarios as you like.
How much mortgage can I qualify for?
Lenders size the loan from your income, debts and down payment, generally keeping total debts under about 43% of gross income and the housing payment near 28%.
The maximum they approve is often more than you should comfortably carry — this tool shows both.
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