Income tax Income tax (Tables)

6 Months Ended

Jun. 30, 2020

Income Tax Disclosure [Abstract]

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

The significant differences between the U.S. Federal statutory tax rate and PGE’s effective tax rate are reflected in the following table:

	Three Months Ended June 30,				Six Months Ended June 30,
	2020		2019		2020		2019
Federal statutory tax rate	21.0	%	21.0	%	21.0	%	21.0	%
Federal tax credits*	(14.4)		(15.1)		(12.0)		(13.3)
State and local taxes, net of federal tax benefit	10.9		6.5		8.5		6.5
Flow-through depreciation and cost basis differences	(2.6)		0.4		0.3		1.4
Amortization of excess deferred income tax	(2.5)		(2.7)		(2.1)		(3.2)
Other	(1.0)		0.6		0.4		0.1
Effective tax rate	11.4	%	10.7	%	16.1	%	12.5	%

* Federal tax credits consist of production tax credits (PTCs) earned from Company-owned wind-powered generating facilities. PTCs are earned based on a per-kilowatt hour rate and, as a result, the annual amount of PTCs earned will vary based on weather conditions and availability of the facilities. PTCs are earned for 10 years from the in-service dates of the corresponding facilities. PGE’s wind-powered generating facilities are eligible to earn PTCs until various dates through 2024.