How to calculate the down payment and monthly payment for buying a house
Recently, the topic of buying a house has once again become the focus of heated discussions across the Internet. With the adjustment of real estate market policies and changes in interest rates in various places, home buyers have increasingly urgent needs to calculate down payments and monthly payments. This article will combine popular discussions on the Internet to provide you with a detailed analysis of the calculation methods of down payment and monthly payment for buying a house, and provide structured data reference.
1. How to determine the down payment ratio?

The down payment ratio is the first step in buying a house. The down payment ratio will be different in different cities and under different house purchase policies. The following is the current reference for down payment ratios in mainstream cities:
| city type | Down payment ratio for first home | Down payment ratio for second home |
|---|---|---|
| first tier cities | 30%-35% | 40%-70% |
| New first-tier cities | 20%-30% | 30%-50% |
| Second tier cities | 20%-25% | 30%-40% |
| Third and fourth tier cities | 20% | 30% |
2. Detailed explanation of monthly payment calculation formula
The monthly payment calculation mainly involves three key factors: loan amount, loan term and loan interest rate. The current mainstream calculation method is the equal principal and interest repayment method, and its calculation formula 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]
To facilitate understanding, we take different loan scenarios as examples:
| total house price | down payment ratio | loan amount | Loan term | loan interest rate | Monthly payment amount |
|---|---|---|---|---|---|
| 2 million | 30% | 1.4 million | 30 years | 4.1% | 6764 yuan |
| 1.5 million | 20% | 1.2 million | 25 years | 4.3% | 6529 yuan |
| 1 million | 25% | 750,000 | 20 years | 4.0% | 4545 yuan |
3. Key factors affecting monthly payment
1.loan interest rate: The current LPR interest rate is floating, and home buyers need to pay attention to the latest benchmark interest rate.
2.loan term: The longer the loan term, the smaller the monthly payment pressure, but the higher the total interest expense.
3.Repayment method: There are obvious differences between the two methods of equal principal and interest and equal principal. The former has a fixed monthly payment, while the latter has high initial pressure but low total interest.
4. Comprehensive calculation of house purchase costs
In addition to the down payment and monthly payment, home buyers also need to consider other costs:
| Expense items | calculation standard | Example amount (1 million real estate) |
|---|---|---|
| Deed tax | 1%-3% | 10,000-30,000 |
| maintenance fund | 50-200 yuan/㎡ | 0.5-20,000 |
| agency fee | 1%-2% | 10,000-20,000 |
| Appraisal fee | 0.1%-0.5% | 0.1-0.5 million |
5. Suggestions for optimizing down payment and monthly payment
1.Reasonably plan the down payment ratio: Don’t blindly pursue the lowest down payment. You should comprehensively consider your own financial situation and long-term repayment ability.
2.Pay attention to interest rate preferential policies: Some cities have additional discounts on first-time home interest rates. Please consult several banks.
3.Make good use of provident fund loans: Provident fund loan interest rates are usually 1-1.5 percentage points lower than commercial loans, which can significantly reduce monthly payment pressure.
4.Consider repayment flexibility: It is recommended that the monthly payment should not exceed 40% of the family income, and sufficient living funds should be reserved.
From the above analysis, we can see that the calculation of the down payment and monthly payment for buying a house requires comprehensive consideration of many factors. In the current economic environment, it is recommended that home buyers be fully prepared, rationally evaluate their own financial strength, and choose the most suitable home purchase plan. If you need more accurate calculations, you can use the mortgage calculator tools provided on the official websites of major banks.
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