Mortgage Calculator

Wondering what a Herriman, Daybreak, or South Jordan home might actually cost month to month? This calculator gives you a starting point, but the number that matters most is not just the payment. It is how that payment fits your life, your timeline, and the kind of home you are trying to buy.

How to Use This Mortgage Calculator

Start with the home price you are considering, then add your estimated down payment, interest rate, loan term, property taxes, insurance, HOA fees, and PMI if they apply. The calculator will help you see a clearer monthly payment estimate, not just the listing price. You can also test extra payments or refinance scenarios to understand how small changes may affect your long-term cost.

All calculations run in your browser (no account, no backend).

Loan setup

Purchase Existing loan

Home price

Enter the purchase price. Your loan amount is typically home price − down payment (plus any financed costs, if applicable).

Down payment ($)

If you know your down payment as a percent, use the % field—this tool keeps $ and % in sync.

Down payment (%)

Current principal balance

This is your remaining loan balance (often called the payoff amount). You can find it on a recent statement or servicer portal.

Interest rate (APR %)

Use the note rate from a quote or your current mortgage. This tool models a fixed rate over the full term.

Loan term (years)

Start month

Used only to label the schedule and compute an estimated payoff month/year. It does not change the math.

Advanced costs (optional)

Property taxes (yearly)

Used for an “all‑in monthly” estimate (not part of amortization).

Homeowners insurance (yearly)

HOA fees (monthly)

PMI (monthly, if applicable)

Optional estimate. PMI rules vary by loan type and lender.

Extra payments (optional)

Extra payment (monthly)

Applied as additional principal after each scheduled payment.

Start month (payment #)

1 = first payment.

One-time extra payment

Apply in month (payment #)

Tip: If your goal is to pay off the loan faster, try adding a small recurring extra payment first (like $50–$200/month). Then test a one‑time lump sum (tax refund, bonus, etc.).

Refinance comparison (optional)

Enable refinance comparison Apply same extra payments after refinance

Refinance in month (payment #)

Example: 1 means refinance immediately (before the first payment). 13 means refinance after 12 payments have been made.

New interest rate (APR %)

New term (years)

Closing costs (total)

Roll closing costs into new loan balance

If checked, costs are financed (higher principal). If not, costs are treated as an upfront cash cost at refinance.

Tip: Break-even depends on how long you’ll keep the home. If you might move before you break even, a refinance may not pencil out.

Results

Monthly P&I payment

$—

Scheduled principal + interest only

Estimated all‑in monthly cost

$—

P&I + taxes/insurance/HOA/PMI + recurring extra

Total interest (estimate)

$—

Total paid (P&I + extra)

$—

Excludes taxes/insurance/HOA/PMI

Payoff date

—

Based on start month + payoff month index

Loan amount (principal)

$—

—

Monthly payment breakdown

—

Amortization schedule

The schedule below shows the first 12 payments by default. Use “Show full schedule” to expand.

#	Month	Payment (P&I)	Extra	Interest	Principal	Balance	Cum. interest

Refinance results

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Payoff timeline (Mermaid code)

If your site supports Mermaid rendering elsewhere, you can paste this snippet into a Mermaid block. This tool does not load Mermaid.