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Mortgage Calculator – Home Loan Payment & Amortization Calculator

Mortgage Calculator

Enter home price, down payment, interest rate, and loan term, then click "Calculate Mortgage".

Example: $300k home, 20% down, 6% rate, 30 years → ~$1,438/month P&I

The Mortgage Calculator helps you estimate your monthly home loan payment, including principal, interest, property taxes, and homeowners insurance (PITI). Whether you are buying your first home, refinancing, or comparing loan options, this home loan calculator provides instant, accurate results with a full step‑by‑step breakdown. It uses the standard amortization formula to compute your monthly payment and total interest over the life of the loan.

Mortgage Formula & Amortization

M = P × r × (1+r)^n / ((1+r)^n − 1)

Where M = monthly payment, P = loan amount, r = monthly interest rate, n = number of months.

For example, a $300,000 home with 20% down ($60,000 down, $240,000 loan) at 6% interest for 30 years gives a monthly principal & interest payment of about $1,438. Adding estimated property tax ($167/month) and insurance ($83/month) brings the total monthly payment to approximately $1,688.

This mortgage calculator works with any currency – simply select your currency from the dropdown at the top of the calculator. Whether you are buying a home in the US (USD), Europe (EUR), India (INR), or any other country, the mortgage formula remains the same. Property tax and insurance amounts should be entered in your local currency to get accurate monthly payment estimates. This makes our tool truly global, helping homebuyers around the world plan their finances.

Applications

  • Home buying: Estimate affordability before house hunting.
  • Refinancing: Compare your current mortgage with new rates.
  • Budgeting: Plan your monthly housing expenses.
  • Investment property analysis: Evaluate cash flow and ROI.
Understanding PITI (Principal, Interest, Taxes, Insurance)

Your total monthly mortgage payment typically consists of four parts: Principal (paying down the loan balance), Interest (cost of borrowing), Property Taxes (local government), and Homeowners Insurance (protects against damage). Lenders often escrow taxes and insurance, meaning they collect them monthly and pay the bills on your behalf.

If you put less than 20% down, you may also need Private Mortgage Insurance (PMI). Our calculator does not include PMI; add it manually if required.

Factors That Affect Your Mortgage Payment

  • Credit score: Higher scores qualify for lower interest rates, saving thousands over the loan term.
  • Down payment size: Larger down payments reduce the loan amount and may eliminate PMI.
  • Loan term: Shorter terms (15 years) have higher monthly payments but much lower total interest.
  • Interest rate type: Fixed rates stay constant; adjustable rates (ARM) can change after an initial period.
  • Location: Property tax rates vary by county; our calculator lets you enter your local rate.

How to Use This Mortgage Calculator for Home Affordability

Start by entering the home price you are considering. A common rule of thumb is that your monthly housing payment (including taxes and insurance) should not exceed 28% of your gross monthly income. Use our calculator to find the payment, then divide by 0.28 to estimate the minimum income required. For example, a $1,500 monthly payment would require about $5,357 per month income ($64,300 annually).

Common Mortgage Mistakes to Avoid

  • Ignoring taxes and insurance: Many buyers focus only on principal & interest, then are surprised by higher monthly costs.
  • Choosing the longest term available: A 30‑year loan has lower payments but much higher total interest than a 15‑year loan.
  • Not shopping around: Even a 0.5% rate difference can save tens of thousands over the loan life.
  • Forgetting about closing costs: These can add 2‑5% of the home price to your upfront cash needed.

Mortgage Amortization – How Your Payment Is Split

Early in the loan, most of your monthly payment goes toward interest. As you make payments, the balance decreases, and more of each payment goes to principal. This is called amortization. After 15 years of a 30‑year loan, you will have paid about 70% of the total interest but only 30% of the principal. Our calculator shows total interest; for a detailed amortization schedule, use a separate tool.

Use this mortgage calculator for all your home financing decisions. Bookmark it to compare different down payments, interest rates, and loan terms. Whether you are a first‑time buyer or a real estate investor, this tool simplifies complex loan calculations.

Step‑by‑Step Manual Example

Home price: $300,000, Down payment: $60,000 (20%), Rate: 6%, Term: 30 years

Step 1: Loan amount = $300,000 − $60,000 = $240,000

Step 2: Monthly rate = 6% / 12 = 0.5% = 0.005

Step 3: Number of months = 30 × 12 = 360

Step 4: Monthly payment = 240,000 × 0.005 × (1.005^360) / ((1.005^360) − 1) ≈ $1,438.92

Step 5: Total payment over 30 years = $1,438.92 × 360 ≈ $518,011

Step 6: Total interest = $518,011 − $240,000 ≈ $278,011

Frequently Asked Questions about Mortgages

What is PITI?
PITI stands for Principal, Interest, Taxes, and Insurance – the four components of a typical mortgage payment. Lenders often require escrowing taxes and insurance.
What is the difference between interest rate and APR?
Interest rate is the cost of borrowing. APR includes the interest rate plus other loan costs (points, fees). Our calculator uses the interest rate.
How does a larger down payment affect my mortgage?
A larger down payment reduces the loan amount, lowers monthly payments, and can eliminate Private Mortgage Insurance (PMI) if you put at least 20% down.
Should I choose a 15‑year or 30‑year mortgage?
15‑year loans have higher monthly payments but much lower total interest; 30‑year loans have lower monthly payments but cost more over time. Choose based on your budget.