How to calculate mortgage loan if interest rate rises
Recently, central banks in many countries and regions around the world have announced interest rate hikes to deal with inflation and economic pressure. This policy change directly affects the adjustment of mortgage interest rates. Many home buyers and lenders have begun to pay attention to the calculation method of mortgage loans after interest increases. This article will give you a detailed analysis of the calculation method of mortgage loans after interest increases, and provide structured data to help you better understand.
1. The impact of rising interest rates on housing loans

Rising mortgage interest rates mean that borrowers need to pay higher interest every month, and the total repayment will also increase accordingly. Here is an example of mortgage repayments before and after interest increases:
| loan amount | original interest rate | new interest rate | repayment period | Increase in monthly payment | Total interest increases |
|---|---|---|---|---|---|
| 1 million yuan | 4.5% | 5.0% | 30 years | About 300 yuan | About 100,000 yuan |
| 2 million yuan | 4.5% | 5.0% | 30 years | About 600 yuan | About 200,000 yuan |
2. Key factors in mortgage calculation
The calculation of a mortgage loan mainly involves the following key factors:
1.Loan principal: That is the amount you need to borrow.
2.loan interest rate: The annual interest rate provided by a bank or financial institution, usually divided into fixed interest rate and floating interest rate.
3.repayment period: The loan repayment time, usually in years.
4.Repayment method: Common repayment methods include equal principal and interest and equal principal.
3. The difference between equal principal and interest and equal principal
Here is a comparison of the two repayment options:
| Repayment method | Features | Suitable for the crowd |
|---|---|---|
| Equal principal and interest | The monthly repayment amount is fixed, and the interest proportion gradually decreases | Office workers with stable income |
| Equal amount of principal | The monthly principal repayment is fixed, the interest gradually decreases, and the monthly payment decreases | People with strong early repayment ability |
4. Calculation method of mortgage loan after interest rate increases
Taking equal amounts of principal and interest as an example, the calculation formula for the monthly mortgage payment is:
Monthly payment = [Loan principal × monthly interest rate × (1 + monthly interest rate)^number of repayment months] / [(1 + monthly interest rate)^number of repayment months - 1]
Assuming that the loan principal is 1 million yuan, the original interest rate is 4.5%, the new interest rate is 5.0%, and the repayment period is 30 years (360 months), the monthly payment changes as follows:
| interest rate | monthly payment | total interest |
|---|---|---|
| 4.5% | About 5,066 yuan | About 824,000 yuan |
| 5.0% | About 5,368 yuan | About 932,000 yuan |
5. How to deal with rising interest rates
1.Early repayment: If you have idle funds, you may consider repaying your loan early to reduce interest expenses.
2.Choose a fixed rate: In a rising interest rate cycle, choosing a fixed-rate loan can lock in a lower interest rate.
3.Adjust repayment method: Choose a more suitable repayment method based on your own financial situation.
4.Pay attention to policy changes: Keep abreast of the interest rate adjustment policies of the central bank and banks and make financial plans.
6. Conclusion
The impact of rising interest rates on housing loans cannot be ignored. Home buyers and lenders should fully understand the impact of interest rate changes on repayment and take corresponding countermeasures. Through reasonable financial planning and repayment strategies, the economic pressure caused by rising interest rates can be effectively reduced.
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