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税金や保険料を含む毎月の住宅ローン支払額を推定します。
Buying a home is likely the largest financial commitment you will ever make. Before you start touring houses, it is vital to have a clear understanding of what your monthly costs will actually look like. A mortgage payment is more than just the repayment of the loan; it often includes interest, property taxes, and homeowners insurance—collectively known as PITI. This calculator is designed to give you a comprehensive view of your potential home ownership costs, helping you stay within a budget that is comfortable for your long-term financial health.
使い方
This mortgage calculator takes the home price and subtracts your down payment to determine the loan principal. It then applies the standard amortization formula using your interest rate and loan term to calculate the monthly principal and interest. Finally, it adds an estimate for property taxes (usually around 1.2% of home value annually) and homeowners insurance to provide a realistic 'all-in' monthly payment figure.
計算式
M = P [ i(1 + i)^n ] / [ (1 + i)^n – 1 ]
Calculation Examples
Consider a home priced at **$400,000** with a **20% down payment ($80,000)** and a **30-year fixed rate of 6.5%**:
* **Principal Loan Amount**: $320,000
* **Monthly Principal & Interest**: ~$2,022
* **Estimated Taxes & Insurance**: ~$500
* **Total Monthly Payment**: **~$2,522**
If you chose a **15-year term** for the same loan, your monthly payment would rise to approximately **$3,288**, but you would save over **$150,000 in interest** over the life of the loan.
Why use this tool in your daily life?
Real estate is a high-stakes decision. This tool provides the 'all-in' cost clarity you need to negotiate with banks and realtors from a position of strength, ensuring you buy a home you can actually afford to live in.
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