Mortgage Payment
Shock Calculator
Calculate your exact monthly mortgage payment, see the true lifetime cost of your home loan, and compare 15-year vs 30-year terms side-by-side — instantly, right in your browser.
What you'll calculate
Know your numbers before you make the biggest purchase of your life.
Monthly Payment
Exact P&I breakdown
Total Interest
Full lifetime cost
15 vs 30 Year
Side-by-side savings
Total Home Cost
All-in ownership figure
Jump to
Why Mortgage Planning Matters Before You Buy
Interest rates change everything
A difference of just 1% in your mortgage interest rate on a $400,000 loan can add or subtract over $80,000 in total interest on a 30-year term. Using a mortgage interest calculator before locking in a rate is essential — not optional.
Loan term impacts affordability
Our home loan calculator lets you instantly compare how a 15-year and 30-year term affect your monthly cash flow. Shorter terms build equity faster and dramatically reduce total interest paid, while longer terms maximize monthly payment flexibility.
Investors need to model it precisely
Real estate investors rely on a house affordability calculator and mortgage payment estimator to underwrite deals accurately. Knowing your debt service before you make an offer is the difference between a profitable investment and a money pit.
Mortgage Payment Calculator
Adjust the inputs below to instantly see your monthly payment, total interest, and full home cost. All calculations run locally — no data is sent anywhere.
Loan Details
Payment Summary
30-year fixed rate mortgage
Monthly Payment
$2,022.62
Principal & interest · 30-year fixed
Total Interest Paid
$408,142
over the full loan term
Total Home Cost
$808,142
principal + interest + down
Interest as % of home price
102%
Interest can account for a significant portion of your home cost. Compare loan terms before making long-term decisions.
Explore Real Estate Investment Opportunities
Now that you know your mortgage payment, find properties that pencil out. Browse our nationwide database of foreclosures, pre-foreclosures, and auction listings to find your next investment with data you can trust.
Understanding Mortgage Costs & Loan Terms
Interest is not just a fee — it's often the largest line item in your home purchase. Here's what every buyer and investor needs to know.
How Your Monthly Payment Is Split
Every mortgage payment has two parts.
In the early years of your loan, the vast majority of each payment goes toward interest, not principal. This is called an amortizing loan. On a $300,000 30-year mortgage at 6.5%, your first payment might consist of ~$1,625 in interest and just ~$275 in principal reduction.
Over time, this ratio flips — by the final years, nearly your entire payment reduces the principal. The total interest paid is why the true cost of homeownership is often 1.5–2× the purchase price over a full 30-year term.
The Formula
15-Year vs 30-Year: Which Is Right for You?
The most common decision every homebuyer faces.
Choose 15-Year If...
- You want to pay off your home faster
- You can comfortably afford the higher payment
- You want to save significantly on total interest
- You are close to retirement
Choose 30-Year If...
- You need lower monthly payments
- You want more investment flexibility
- The property is a rental (cash-flow matters most)
- You plan to sell or refinance within 7–10 years
Mortgage Calculator FAQs
Common questions about mortgage payments, interest calculations, and loan terms.
How is my monthly mortgage payment calculated?
Your monthly payment uses the standard amortization formula: M = P × r × (1+r)^n / ((1+r)^n − 1), where P is the loan amount, r is the monthly interest rate (annual rate ÷ 12), and n is the total number of payments (loan years × 12). This calculator computes the result instantly in your browser with no server calls.
Should I choose a 15-year or 30-year mortgage?
A 15-year mortgage typically saves tens of thousands in interest but requires a significantly higher monthly payment. A 30-year mortgage offers lower monthly payments and more cash-flow flexibility, making it popular for investment properties and buyers on tighter budgets. Use the comparison toggle above to see your specific numbers side-by-side.
Why does total interest sometimes exceed the home price?
On a 30-year loan at a moderate interest rate, total interest paid commonly equals 60–100% of the original loan amount. For a $300,000 loan at 7%, you'll pay roughly $419,000 in interest over 30 years in addition to repaying the principal. This is why comparing loan terms and making extra payments when possible can save you significantly.
Does this calculator include property taxes and insurance?
This mortgage payment estimator focuses exclusively on principal and interest — the core loan payment. Your total PITI (Principal, Interest, Taxes, Insurance) will be higher depending on your local property tax rate and homeowner's insurance. For a complete investment analysis including operating expenses, try our BRRRR Strategy Calculator.
Ready to invest?
Put Your Numbers to Work
You know your mortgage payment. Now find properties that generate positive cash flow from day one. Access our nationwide foreclosure database and property investment data to source your next deal.