Mortgage Calculator

Mortgage Calculatorの無料・高速・高精度ツール

住宅ローン計算機 — 毎月返済額シミュレーション(変動・固定金利・ボーナス払い対応)

住宅ローンシミュレーターの概要

物件購入価格、頭金、借入期間(最長35年など)、借入金利(変動金利または固定金利)を入力することで、毎月の返済額、ボーナス返済額、総支払利息、諸経費を含めた総合的な返済シミュレーションが行えるツールです。

変動金利と固定金利(フラット35)の選び方

  • 変動金利: 適用金利が年0.3%〜0.6%前後と非常に低い反面、将来の金利上昇リスクを負います(5年ルール・125%ルール等あり)。
  • 固定金利(フラット35等): 借入全期間の金利が固定されるため、将来の市場金利変動に左右されず確実な返済計画が立てられます。

無理のない返済比率(返済負担率)の目安

銀行の審査基準では年収の30%〜35%まで借入可能なケースもありますが、安心した生活を送るための理想的な返済負担率は「手取り年収の20%〜25%以内」が推奨されます。

Frequently Asked Questions

To calculate a mortgage, subtract your down payment from the home purchase price to find the loan principal. Then, apply the standard amortization formula using your annual interest rate, loan term (e.g. 15 or 30 years), and compounding frequency to calculate your monthly principal and interest payment.

The 6 primary types of mortgages are: (1) Conventional Fixed-Rate Mortgages, (2) Adjustable-Rate Mortgages (ARM), (3) FHA Loans, (4) VA Loans, (5) USDA Loans, and (6) Jumbo Loans.

Mortgage interest is calculated monthly based on your remaining loan balance. Multiply your remaining principal balance by your annual interest rate divided by 12 (Monthly Interest = Remaining Principal × [Annual Interest Rate / 12]). Early in the loan, a larger portion of your monthly payment goes toward interest.

For a ₹20 Lakh (₹2,000,000) mortgage loan at an average interest rate of 8.5% per annum for a 20-year tenure (240 months), the estimated monthly EMI is approximately ₹17,356 per month. Total interest payable over 20 years is ₹21.65 Lakhs.

The standard monthly mortgage payment formula is: M = P [ r(1 + r)^n ] / [ (1 + r)^n - 1 ], where M is monthly payment, P is principal loan amount, r is monthly interest rate (annual rate / 12), and n is total number of monthly payments (years × 12).

To calculate a mortgage loan: (1) Determine the home purchase price and subtract your down payment. (2) Identify the annual interest rate offered by the lender. (3) Choose your loan term (e.g., 15, 20, or 30 years). (4) Enter these numbers into the CalculatorsDaily Mortgage Calculator for instant monthly payment and total interest figures.

免責事項

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