If taxpayers or their spouses use individual housing loans from commercial banks or housing accumulation funds alone or jointly to purchase housing for themselves or their spouses in China, the interest expenses incurred in the first housing loan shall be deducted according to the standard quota of 1 000 yuan per month in the year when the loan interest actually occurred, and the maximum deduction period shall not exceed 240 months. Taxpayers can only enjoy a first home loan interest deduction. Legal basis: Article 14 of the Interim Measures for Special Additional Deduction of Individual Income Tax. If a taxpayer or his spouse uses a personal housing loan or housing accumulation fund of a commercial bank to purchase housing for himself or his spouse in China, the interest expenses incurred from the first housing loan shall be deducted according to the standard quota of RMB 1 000 per month in the year when the loan interest actually occurs, and the maximum deduction period shall not exceed 240 months. Taxpayers can only enjoy a first home loan interest deduction. The term "first home loan" as mentioned in these Measures refers to the housing loan that enjoys the interest rate of the first home loan when buying a house. Fifteenth agreed by both husband and wife, can choose to be deducted by one of them, the specific method of deduction shall not be changed within a tax year. For the first set of housing loans that occur when the husband and wife buy houses separately before marriage, they can choose to buy 1 house after marriage, and the buyer will deduct it according to the deduction standard of 100%, or the husband and wife will deduct it according to the deduction standard of 50%, and the specific deduction method cannot be changed within one tax year. Article 16 Taxpayers should keep the housing loan contract and repayment expenditure vouchers for future reference.

Legal objectivity:

Calculation of taxable income in Article 6 of the Individual Income Tax Law of People's Republic of China (PRC): (1) The comprehensive income of individual residents, after deducting expenses of 60,000 yuan from the income in each tax year, plus the balance after special additional deductions and other deductions determined according to law, is taxable income. (2) For the income from wages and salaries of non-resident individuals, the taxable income shall be the balance of monthly income after deducting expenses of 5,000 yuan; Income from remuneration for labor services, remuneration for manuscripts and royalties shall be taxed. (3) For operating income, the taxable income shall be the balance of the total income in each tax year after deducting costs, expenses and losses. (four) if the income from property leasing does not exceed 4,000 yuan each time, the 800 yuan shall be deducted; If it exceeds 4,000 yuan, 20% of the expenses will be deducted, and the balance will be taxable income. (5) For the income from property transfer, the taxable income shall be the balance after deducting the original value of the property and reasonable expenses from the income from property transfer. (6) Interest, dividends, bonus income and contingent income shall be limited to the taxable income each time. Income from remuneration for labor services, remuneration for manuscripts and royalties shall be the balance after deducting expenses. The amount of remuneration should be reduced by 70%. Individuals donate their income to public welfare charities such as education, poverty alleviation and poverty alleviation, and the part of the donation that does not exceed 30% of the taxable income declared by taxpayers can be deducted from their taxable income; If the State Council stipulates that donations to charity should be fully deducted before tax, such provisions shall prevail. The special deduction specified in item 1 of the first paragraph of this article includes social insurance premiums such as basic old-age insurance, basic medical insurance, unemployment insurance and housing accumulation fund paid by individual residents in accordance with the scope and standards prescribed by the state; Special additional deductions include children's education, continuing education, medical treatment for serious illness, housing loan interest or housing rent, support for the elderly and other expenses. The specific scope, standards and implementation steps are determined by the State Council and reported to the NPC Standing Committee for the record.