Enforcement Rules of Value-added and Non-value-added Business Tax Act Article 24

With respect to a business entity subject to business tax calculation under Section 1 of Chapter 4 of the Act, the sales amount for security deposits it receives from the leasing out of property shall be calculated on a monthly basis, provided that for any term of lease of less than a full month, the sales amount need not be calculated. The formula for calculation is as follows:Sales amount= Fixed interest rate for a one-year postal time deposit as announced on 1 January of the lease year ÷ 12Security deposit × ───────────────────────────── 1 +Applicable tax rateWith respect to a business entity subject to calculation of business tax under Section 2 of Chapter 4 of the Act, the sales amount for security deposits it receives from the leasing out of property shall be calculated on a monthly basis, provided that for any term of lease of less than a full month, the sales amount need not be calculated. The formula for calculation is as follows:Sales amount = Security deposit × Fixed interest rate for a one-year postal time deposit as announced on 1 January of the lease year ÷12
中文原文 加值型及非加值型營業稅法施行細則第24條
本法第四章第一節規定計算稅額之營業人,出租財產所收取之押金,應按月計算銷售額,不滿一月者,不計。
其計算公式如下:該年一月一日郵政定期儲金一年期固定利率÷12銷售額=押金×──────────────────────1+徵收率本法第四章第二節規定計算稅額之營業人出租財產所收取之押金,應按月計算銷售額,不滿一月者,不計。
其計算公式如下:銷售額=押金×該年一月一日郵政定期儲金一年期固定利率÷12

English translation for reference only; the Chinese text prevails. Not legal advice.