Conn. Gen. Stat. § 12-258
(b) Gross earnings for any quarterly period, for the purposes of assessment and taxation, shall be as follows: In the case of a person carrying on the business wholly within the limits of this state, the entire amount of the gross earnings subject to the tax imposed under section 12-256; in the case of a person also carrying on the business outside of this state, a portion of the entire amount of the gross earnings subject to the tax imposed under section 12-256 apportioned to this state as follows:
(c) The rates of tax on the gross earnings as determined in this section shall be as follows:
See Sec. 12-268a re decrease or increase in apportionments.
(1949 Rev., S. 1943; 1961, P.A. 604, S. 12; February, 1965, P.A. 169, S. 2; June, 1971, P.A. 8, S. 22; P.A. 81-255, S. 1, 37; P.A. 85-304, S. 2, 4; P.A. 86-410, S. 21, 28; P.A. 89-251, S. 5, 203; P.A. 91-82, S. 2, 5; June 30 Sp. Sess. P.A. 03-1, S. 93; P.A. 06-159, S. 13; P.A. 07-253, S. 27.)
History: 1961 act added reference to “tax year,” conformed section to new chapter 212a, increased tax rate for telegraph, cable and telephone companies from 3% to 4.5% and for telephone companies from 4% to 6%, and deleted provision for deduction of real estate taxes; 1965 act included references to lines and auxiliary equipment, added provisions concerning community antenna television systems and included such systems in 6% tax rate; 1971 act changed tax rate for telephone companies and community antenna television systems to 8%; P.A. 81-255 increased rate of tax to 9% for telephone companies and community antenna television systems, effective July 1, 1981, and applicable to tax years commencing on or after January 1, 1981; P.A. 85-304 deleted all references to railroad car companies as part of the repeal of the tax imposed under chapter 211 with respect to such companies, effective June 5, 1985, and applicable to tax years of car companies commencing on or after January 1, 1985; P.A. 86-410 substituted “regulated telecommunications service rendered in this state for consideration and any access charges collected by such company” for “telephone exchanges” as the source of gross earnings subject to tax, and eliminated apportionment of gross earnings of telephone companies based on the number of telephonic instruments within and without the state, effective June 4, 1986, and applicable to tax years commencing on or after January 1, 1986; P.A. 89-251 added the provisions that tax shall not be applicable to telecommunications companies on or after January 1, 1990, and that the rate of tax applicable to community antenna television systems shall be reduced from 9% to 5% of gross earnings on or after January 1, 1990; P.A. 91-82 made certain changes required by the repeal of the telecommunications service company tax and made other minor changes to clarify definitions, effective May 9, 1991, and applicable to taxable years of taxpayers commencing on or after January 1, 1991; June 30 Sp. Sess. P.A. 03-1 provided for taxation of earnings of satellite television businesses and added references to “quarterly period”, effective September 1, 2003, and applicable to quarterly periods commencing on and after that date; P.A. 06-159 divided section into Subsecs. (a), (b) and (c), eliminated tax year as basis for gross earnings, deleted provisions re express business on railroads or telegraph or cable business and made conforming changes, effective October 1, 2006, and applicable to quarterly periods commencing on and after that date; P.A. 07-253 amended Subsecs. (a) and (c)(1) to add certified competitive video service and added Subsec. (b)(3) re certified competitive video service, effective July 1, 2007.