Calculate Your Home Budget with Mortgage Auditing
Estimate your monthly payments and analyze your amortization schedule. Include property taxes, home insurance, and Private Mortgage Insurance (PMI) estimates. View total interest costs over the life of your home loan.
How the Mortgage Calculator Works
Model your monthly expenses, down payments, and interest allocations in three simple steps.
Enter Purchase Parameters
Input the target home price and your down payment in dollars or percentage. Define the principal balance of the loan.
Set Rate & Term Length
Choose your amortization term length (e.g. 15-year or 30-year fixed) and input the expected annual interest rate.
Inspect Amortization Schedule
Audit the breakdown of principal vs. interest over time. Factor in taxes, insurance, and PMI, then download the ledger.
Why use our Mortgage Simulator?
Buying a home is one of the largest financial decisions you will make. Our calculator helps you model every expense with absolute privacy.
Complete Cost Breakdown
View a detailed breakdown of your monthly payment, including principal, interest, local property taxes, homeowners insurance, and Private Mortgage Insurance (PMI).
Interactive Amortization schedule
Track how each payment reduces your principal balance over the life of the loan. Identify exactly when your PMI will be removed (once equity reaches 20%).
Zero Data Leakage
Your income, home value, and financial assets are processed strictly client-side in your local browser sandbox memory. No numbers are ever uploaded or shared.
Frequently Asked Questions
Answers to popular questions about home loans, principal, and amortization.
Q.What is included in a monthly mortgage payment?
A complete monthly payment typically includes Principal (repaying the borrowed amount), Interest (the cost of borrowing), Property Taxes (assessed by your local government), Homeowners Insurance (protecting your asset), and Private Mortgage Insurance (PMI) if your down payment is below 20%.
Q.What is Private Mortgage Insurance (PMI) and how do I avoid it?
PMI is an extra insurance fee required by lenders to protect their investment if you put down less than 20% of the home's purchase price. You can avoid PMI by making a down payment of 20% or more, or cancel it once your unpaid loan principal falls to 80% of the home's original value.
Q.How does the loan term affect my total interest cost?
Shorter loan terms (such as a 15-year fixed mortgage) have higher monthly payments because you repay the principal faster, but they offer significantly lower interest rates and save you tens of thousands of dollars in total interest costs compared to a 30-year term.
Q.Are these interest and amortization calculations private?
Yes, 100% private. All amortization and tax calculations occur strictly inside your local browser sandbox memory using client-side JavaScript. None of your private financial data is ever transmitted to external servers.
How Mortgage Calculator Works
Our high-performance online utility runs entirely client-side, processing your files securely and instantly inside your web browser. For related functions, you can also use our Mortgage Payoff and Finance utilities.
Enter Home Price
Step-by-step interactive processing designed for simple, fast, and high-fidelity execution.
Set Down Payment
Step-by-step interactive processing designed for simple, fast, and high-fidelity execution.
Calculate Monthly Payment
Step-by-step interactive processing designed for simple, fast, and high-fidelity execution.
Mortgage Components
Designed for professional results, privacy, and maximum compatibility across all modern desktop and mobile browsers:
Property Tax Included
Full digital precision and optimized performance with zero server-side latency or external data transfers.
Home Insurance
Full digital precision and optimized performance with zero server-side latency or external data transfers.
PMI Calculator
Full digital precision and optimized performance with zero server-side latency or external data transfers.
Amortization Schedule
Full digital precision and optimized performance with zero server-side latency or external data transfers.
Frequently Asked Questions About Mortgages
Is this mortgage calculator free?
Yes. Calculate unlimited mortgage scenarios with no registration.
Does this include PMI calculations?
Yes. Add private mortgage insurance when down payment is below 20%.
Can I see full amortization schedule?
Yes. View month-by-month principal and interest breakdown for entire loan term.
Do you store home price data here?
No. All calculations run locally with complete privacy.