Income Taxes (Tables)

12 Months Ended

Dec. 31, 2020

Income Tax Disclosure [Abstract]

Difference Between AB Holding's Effective Tax Rates and the UBT Statutory Tax Rate

The principal reasons for the difference between AB Holding’s effective tax rates and the UBT statutory tax rate of 4.0% are as follows:

	Years Ended December 31,
	2020				2019				2018
	(in thousands)
UBT statutory rate	$	12,336	4.0	%	$	10,652	4.0	%	$	10,826	4.0	%
Federal tax on partnership gross business income	28,522		9.2		27,197		10.2		27,674		10.2
State income taxes	502		0.2		532		0.2		576		0.2
Credit for UBT paid by AB	(12,336)		(4.0)		(10,652)		(4.0)		(10,826)		(4.0)
Income tax expense and effective tax rate	$	29,024	9.4		$	27,729	10.4		$	28,250	10.4

Computation of Effective Income Tax Rate and Changes in Components of Income Tax

AB Holding Units in AB’s consolidated rabbi trust are not considered outstanding for purposes of calculating AB Holding’s ownership interest in AB.

	Years Ended December 31,									% Change
	2020			2019			2018			2020-19		2019-18
	(in thousands)
Net income attributable to AB Unitholders	$	865,952		$	752,042		$	757,588		15.1	%	(0.7)	%
Multiplied by: weighted average equity ownership interest	35.6		%	35.4		%	35.7		%
Equity in net income attributable to AB Unitholders	$	308,404		$	266,292		$	270,647		15.8		(1.6)
AB qualifying revenues	$	2,704,137		$	2,640,169		$	2,647,254		2.4		(0.3)
Multiplied by: weighted average equity ownership interest for calculating tax	30.1		%	29.4		%	29.9		%
Multiplied by: federal tax	3.5		%	3.5		%	3.5		%
Federal income taxes	28,522			27,197			27,674
State income taxes	502			532			576
Total income taxes	$	29,024		$	27,729		$	28,250		4.7		(1.8)