1. The more down payment, the less money you need to borrow from the bank. Take a house with a total value of 6,543,800 yuan as an example. If the down payment is 800,000 yuan, you need to borrow 200,000 yuan from the bank and pay it off in 20 years. The principal and interest will be calculated according to the bank's interest and repaid in RMB every 20 years, including RMB. If the down payment is 900,000 yuan and only 654.38+million yuan is borrowed from the bank, and the repayment time and method are restricted, the interest to be paid to the bank will be halved. The longer it takes to borrow money from a bank, the greater the principal amount, and the more interest to be paid to the bank. The down payment pressure is great, but the later repayment amount will be less.

2. Less down payment, less pressure on the present, but greater pressure on repayment in the later period. But considering the long-term inflation, if the future money may be less valuable, then pay less down payment.

Therefore, whether the down payment is overpaid or underpaid is not a definite answer, which needs to be considered in combination with factors such as one's repayment ability, bank loan interest and inflation.

What if the mortgage down payment is not enough?

1. Mortgaging an old house and paying a down payment with a loan is a common way, but only if you have a house. This way, you can get a larger loan, but it is very stressful to bear two loans at the same time, and the loan interest rate obtained by mortgage is higher, and the loan life will be shortened.

2. If your credit is good and your qualification is good, the amount of credit loan you can apply for is quite large. It is understood that the interest rate in this way is low, but there are corresponding requirements for the loan period. This method is suitable for people with higher income, because after buying a house, not only the mortgage, but also the credit loan, and the pressure of repayment in the later period is relatively high.

If you have a good relationship with relatives and friends, you can consider asking them for help. However, when borrowing money from relatives and friends, we must measure each other's financial situation, sign a formal debit note, and remember to repay when there is more money, so as to avoid disputes and affect the relationship between relatives and friends.