Timing of tax on financial intermediation services The tax on financial intermediation services provided by section 801 with respect to an underlying investment account or debt shall be imposed and collected with the same frequency that statements are rendered by the financial institution in connection with the investment account or debt but not less frequently than quarterly. 804. Financing leases (a) Definition For purposes of this section, the term financing lease means any lease under which the lessee has the right to acquire the property for 50 percent or less of its fair market value at the end of the lease term. (b) General Rule Financing leases shall be taxed in the method set forth in this section. (c) Determination of Principal and Interest Components of Financing Lease The Secretary shall promulgate rules for disaggregating the principal and interest components of a financing lease. The principal amount shall be determined to the extent possible by examination of the contemporaneous sales price or prices of property the same or similar as the leased property. (d) Alternative Method In the event that contemporaneous sales prices or property the same or similar as the leased property are not available, the principal and interest components of a financing lease shall be disaggregated using the applicable interest rate (as defined in section 511) plus 4 percent. (e) Principal Component The principal component of the financing lease shall be subject to tax as if a purchase in the amount of the principal component had been made on the day on which said lease was executed. (f) Interest Component The financial intermediation services amount with respect to the interest component of the financing lease shall be subject to tax under this subtitle. (g) Coordination If the principal component and financial intermediation services amount with respect to the interest component of a lease have been taxed pursuant to this section, then the gross lease or rental payments shall not be subject to additional tax. 805.