CA - Underpayment Interest Rates

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California Underpayment Interest Rates

California interest rate compounds daily and is adjusted twice a year.


Year Qtr 1
1/01 - 3/31
Qtr 2
4/01 - 6/30
Qtr 3
7/01 - 9/30
Qtr 4
10/01 - 12/31
2014 3% 3% % %
2013 3% 3% 3% 3%
2012 4% 4% 3% 3%
2011 4% 4% 3% 3%
2010 4% 4% 4% 4%
2009 5% 5% 5% 5%
2008 8% 8% 7% 7%
2007 8% 8% 8% 8%
2006 6% 6% 7% 7%
2005 4% 4% 5% 5%
2004 5% 5% 4% 4%
2003 6% 6% 5% 5%
2002 7% 7% 6% 6%
2001 9% 9% 9% 9%
2000 8% 8% 8% 8%
1999 8% 8% 7% 7%
1998 9% 9% 9% 9%
1997 9% 9% 9% 9%
1996 9% 9% 9% 9%
1995 8% 8% 9% 9%
1994 7% 7% 7% 7%
1993 8% 8% 7% 7%
1992 10% 10% 9% 9%
1991 11% 11% 10% 10%
1990 11% 11% 11% 11%
1989 11% 11% 12% 12%
1988 11% 10% 10% 11%
1987 8% 8% 8% 10%
1986 10% 10% 9% 9%
1985 13% 13% 11% 11%
1984 11% 11% 11% 11%


A TaxAlmanac user was kind enough to contribute these rates:

From To Rate
July 1, 1983 December 31, 1984 11%
March 1, 1983 June 30, 1983 16%
January 1, 1983 February 28, 1983 14%
May 27, 1982 December 31, 1982 18%
January 1, 1976 May 26, 1982 12%
Prehistory January 1, 1976 6%

Source: California Franchise Tax Board

For more information, see Federal Underpayment Interest Rates, which includes federal rates as well as links to other states.

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