Legal analysis: the father borrows money for production, operation or family affairs, and the son repays the obligation without compensation. But if the father borrows money for housework and the son inherits the family inheritance, then the son has the obligation to repay it.

Legal basis: Article 161 of the Civil Law of People's Republic of China (PRC), the successor shall pay off the taxes and debts that the decedent should pay according to law within the actual value of the inheritance. The part exceeding the actual value of the estate shall be voluntarily repaid by the heir. If the heir renounces inheritance, he may not be liable for paying off the taxes and debts that the decedent should pay according to law.