Signed the Contract on a New Home? Check Your Closing Loan First
After you sign a purchase agreement on a new-construction home, you'll typically put down earnest money and make progress payments before the final balance is due at closing. Most buyers finance that balance with a mortgage, and the loan amount is generally based on the purchase price (or appraised value) multiplied by your loan-to-value ratio. A $450,000 home at 80% LTV gives you a loan amount of $360,000. This calculator takes your purchase price and LTV to determine the loan amount, then applies your interest rate and loan term to calculate the monthly payment and total interest under a standard fixed-rate amortization schedule — so you can see ahead of time whether the payment fits your budget.
Keep in mind that the LTV-based amount isn't automatically what you'll be approved for. Lenders also apply a debt-to-income ratio limit, commonly around 43% or lower, based on your income and any other debts you're carrying. If your monthly payment eats up too much of your income, life after move-in can get tight — so it's safer to plan around a comfortable payment rather than the maximum loan you could qualify for.
Frequently Asked Questions
Generally purchase price × LTV. A $450,000 home at 80% LTV gives a $360,000 loan, though DTI and credit can lower the approved amount.
A standard fixed-rate amortization formula — the same payment each month, with early payments weighted toward interest and later ones toward principal.
Yes, lenders cap payments relative to income (often around 43% DTI or lower), and other debts count toward that limit too.
※ Actual loan amounts and rates depend on your lender, credit, and DTI. This is a reference estimate only.