California Conformity to Federal Law
On September 30, 2015, AB 154, the Conformity Act of 2015 was enacted. The Act changes California’s conformity date to the Internal Revenue Code from January 1, 2009, to January 1, 2015. California’s conformity results in numerous substantive changes to both personal and corporation tax law with respect to those areas of preexisting conformity that are subject to changes under federal laws enacted after January 1, 2009. However, there are continuing differences between California and federal law. When California conforms to federal tax law changes, we do not always adopt all of the changes made at the federal level. For more information, get FTB Publication 1001, Supplemental Guidelines to California Adjustments.
- Analysis of Conformity Act
- Conformity Archive
- Summary of Federal Income Tax Changes - 2017
- Legislation Information
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Last Updated: 05.03.2018