Mortgage Calculator: How Much Can I Borrow?

A 6.5% mortgage rate in 2026 can turn a dream home into a financial stretch. The first step isn’t browsing listings – it’s calculating the maximum loan a lender will approve. Our free mortgage borrowing calculator uses your income, debts, and down payment to give you a realistic starting point.

The calculator considers your gross annual income, current monthly debt payments, expected down payment, interest rate, loan term, property tax rate, and homeowners insurance. It applies a standard debt-to-income cap (the 28/36 rule) to estimate the highest monthly housing payment you could qualify for, then computes the corresponding mortgage amount and maximum home price.

What Factors Limit How Much Mortgage You Can Get?

Lenders don’t approve a mortgage based on home price alone. They assess your entire financial picture to ensure you can repay the loan. Here are the main factors that influence your borrowing capacity in 2026.

• Gross income: Stable, verifiable income – salary, hourly wages, self-employment earnings, or rental income – forms the foundation. Lenders typically look at the last two years.
• Existing debts: Credit card minimums, auto loans, student loans, and personal loans all count against you. Every $100 of monthly debt payment reduces your available housing budget by roughly $15,000 in loan amount.
• Credit score: A higher score unlocks lower rates and may allow a higher DTI ratio. Conventional loans usually require 620 or above; the best rates go to borrowers with 740+.
• Down payment: A larger down payment reduces the loan amount and can eliminate private mortgage insurance (PMI), which frees up monthly cash flow for the loan itself.
• Interest rate: Even a 0.5% change dramatically affects how much home you can afford. In early 2026, conventional 30-year fixed rates range from 6.5% to 7.2%.
• Loan term: A 30-year term yields lower monthly payments than a 15-year term, increasing your borrowing power but also total interest paid.
• Property taxes and insurance: These vary by location and are escrowed in most loans. Lenders add them to your monthly obligation, directly capping how much principal and interest you can carry.

What Is the 28/36 Rule and How Does It Work?

Most conventional lenders follow the 28/36 rule – a shorthand for two debt-to-income (DTI) limits:

• Front-end DTI (28%): Your total housing expense (principal, interest, property taxes, and insurance – PITI) should not exceed 28% of your gross monthly income.
• Back-end DTI (36%): Your PITI plus all other monthly debt payments (car loans, credit cards, student loans) should not exceed 36% of gross monthly income.

For example, with a $100,000 annual income ($8,333/month), the 28% front-end limit gives you a PITI ceiling of $2,333. If your non-housing debts total $800 a month, the back-end limit ($3,000) leaves $2,200 for PITI. Since the lower of the two binds, the maximum PITI in this case would be $2,200.

Government-backed loans often allow higher ratios: FHA loans may permit a 31/43 split, and VA loans focus on residual income rather than a fixed percentage. Jumbo loans and portfolio lenders can be even more flexible.

How to Calculate Your Maximum Loan Amount and Home Price

You can turn the DTI cap into a concrete home price in a few steps. The calculator above does this automatically, but here is a simplified manual example using today’s typical numbers.

Scenario:

• Gross income: $100,000 per year ($8,333/month)
• Monthly debts: $500 car loan + $300 student loan = $800
• Down payment: $40,000
• Interest rate: 6.75% (30-year fixed)
• Property tax: estimated $300/month
• Homeowners insurance: $100/month
• HOA fees: $0

Step 1: Find your maximum PITI. The 28% front-end ratio gives $2,333. The back-end leaves $3,000 – $800 = $2,200. You’re capped at $2,200.

Step 2: Subtract fixed costs. Estimated taxes and insurance total $400. Max principal and interest (P&I) = $2,200 – $400 = $1,800.

Step 3: Compute the loan amount that a $1,800 P&I payment supports. Using a standard mortgage formula, at 6.75% for 30 years, a monthly payment of $1,800 corresponds to a loan of about $278,000.

Step 4: Add your down payment. $278,000 + $40,000 = a home price of $318,000.

Note that actual property tax is based on the home’s sale price, so the calculation is always iterative. The widget refines the numbers until the tax matches the final home value, giving you a more accurate result.

Ways to Increase the Mortgage Amount You Qualify For

If the borrowing limit falls short of your target, several strategies can boost it without waiting for a raise.

• Pay down high-interest debts: Eliminating a $400 monthly car payment could add $60,000 to $80,000 of borrowing power.
• Improve your credit score: Even a 20-point jump can qualify you for a lower rate or a higher DTI allowance. Aim for 740+.
• Save a larger down payment: Putting down 25% instead of 10% not only reduces the loan size but also removes PMI, freeing up room in your DTI.
• Choose a 30-year term: Stretching the loan to 30 years lowers each payment, letting you borrow more for the same monthly budget.
• Look into FHA or VA loans: FHA loans accept DTI ratios up to 50% in some cases; VA loans have no hard DTI cap and focus on residual income.
• Add a co-signer: A qualified co-signer’s income and credit profile can significantly increase the approved amount.
• Shop multiple lenders: Each lender has its own underwriting overlays. A mortgage broker can help you find a lender that allows higher DTI or counts non‑traditional income.

This calculator provides estimates based on typical 2026 conventional lending guidelines. For an exact pre-qualification amount, speak with a licensed mortgage lender.