Mortgage Calculator
Want to know what a mortgage costs per month? Enter the loan amount, interest rate and term to instantly calculate your monthly payment using the annuity method.
結果
￥1,397.87
Monthly payment
- Total to repay
- ￥503,233.94
- Total interest
- ￥203,233.94
公式
M = P · r ÷ (1 − (1 + r)^−n)
P is the loan amount, r the monthly rate (annual rate ÷ 12 ÷ 100) and n the number of months (term × 12). With an annuity mortgage the monthly payment stays constant; the interest portion falls and the repayment portion rises over time.
ステップ解説
- 1Find the monthly rate: 3.8% ÷ 12 = 0.3167% per month.
- 2Calculate the number of months: 30 × 12 = 360.
- 3Enter the values into the formula.
計算例
€ 300,000, 3.8% rate, 30 years
→ Monthly payment ≈ € 1,397 gross.
よくある間違い
- Using the annual rate directly as the monthly rate.
- Forgetting this is the gross payment, excluding tax relief and insurance.
活用シーン
- Estimating whether a home is affordable.
- Comparing different terms and interest rates.
よくある質問
Is this a net or gross monthly payment?
This is the gross payment. Your actual net cost may be lower due to, for example, mortgage interest tax relief.
How does this differ from a linear mortgage?
With a linear mortgage you repay a fixed amount each month, so the payment falls. With an annuity mortgage the payment stays constant.
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