Many states have Earned Income Tax Credit provisions in their income tax laws. Uniformly these are expressed as a percentage of the federal EITC, but sometimes with differing eligibility restrictions. Here is a table showing the state EIC provisions in TAXSIM as of November 2007, which should be current through the calendar 2006 tax year.
Minnesota has a "Working Family Credit" similar to the EITC but with a different structure. It didn't fit in the table below, but is documented here.
Please write to me if you see any incorrect entries.
Daniel Feenberg
feenberg at nber dot org
ID | state | % of fed EITC |           years           | refundability | notes |
---|---|---|---|---|---|
6 | CO | 8.5 | 1999 | refund |   " |
  " |   " | 10 | 2000 and 2001 | refund |   " |
8 | DE | 20 | 2006 + | non-refund |   " |
9 | DC | 10 | 2000 | refund | DC has Low Income Credit and takes max(eitc,lowincomecredit) |
  " |   " | 25 | 2001 -  2004 | refund |   " |
  " |   " | 35 | 2005 + | refund |   " |
14 | IL | min(5%,statax-pcred)>0 | 2000 -  2002 | non-refund |   " |
  " |   " | 5 | 2003 + | refund |   " |
15 | IN | 3.4%*(12000-total income) | 1999 -  2002 | refund | only if dependents>0 |
  " |   " | 3.4 | 2003 + | refund |   " |
16 | IA | 5 | 1990 | non-refund |   " |
  " |   " | 6 | 1991 | non-refund |   " |
  " |   " | 6.5 | 1992 + | non-refund |   " |
17 | KS | 10 | 1998 -  2001 | refund |   " |
  " |   " | 15 | 2002 + | refund |   " |
20 | ME | 5 | 2000 -  2002 | non-refund |   " |
  " |   " | 4.92 | 2003 -  2005 | non-refund |   " |
  " |   " | 5 | 2006 + | non-refund |   " |
21 | MD | 5 | 1987 + | non-refund |   " |
22 | MA | 10 | 1997 -  2000 | refund |   " |
  " |   " | 15 | 2001 + | refund |   " |
28 | NE | 8 | 2006 + | refund |   " |
31 | NJ | 10 | 2000 | refund | only if agi=<20,000 and dependents>0 |
  " |   " | 15 | 2001 | refund |   " |
  " |   " | 17.5 | 2002 | refund |   " |
  " |   " | 20 | 2003 + | refund |   " |
33 | NY | 7.5 | 1994 | refund |   " |
  " |   " | 10 | 1995 | refund |   " |
  " |   " | 20 | 1996 -  1999 | refund | 1996 + % of fed eitc minus min(hcred,statax) |
  " |   " | 22.5 | 2000 | non-refund |   " |
  " |   " | 25 | 2001 | non-refund |   " |
  " |   " | 27.5 | 2002 | non-refund |   " |
  " |   " | 30 | 2003 + | non-refund |   " |
37 | OK | 5 | 2002 + | refund |   " |
38 | OR | 5 | 1997 + | -  2005 non-ref |   " |
  " |   " |   " |   " | 2006 + refund |   " |
40 | RI | 25.5 | 2001 | non-refund |   " |
  " |   " | 25 | 2002 + | non-refund |   " |
  " |   " | 5 | 2003 and 2004 | refundable part |   " |
  " |   " | 10 | 2005 | refundable part |   " |
  " |   " | 15 | 2006 | refundable part |   " |
46 | VT | 23 | 1988 | refund |   " |
  " |   " | 28 | 1989 -  1993 | refund |   " |
  " |   " | 25 | 1994-1999 | refund |   " |
  " |   " | 32 | 2000 + | refund |   " |
50 | WI | 30 | 1984 and 1985 | non-refund |   " |
  " |   " | 5 | 1989-1993 | refund | dependents = 1 |
  " |   " | 25 |   " | refund | dependents = 2 |
  " |   " | 75 |   " | refund | dependents=>3 |
  " |   " | 12 | 1994 | refund | dependents = 1 |
  " |   " | 63 |   " | refund | dependents = 2 |
  " |   " | 18.8 |   " | refund | dependents=>3 |
  " |   " | 4 | 1995 | refund | dependents = 1 |
  " |   " | 16 |   " | refund | dependents = 2 |
  " |   " | 50 |   " | refund | dependents=>3 |
  " |   " | 4 | 1996 + | refund | dependents = 1 |
  " |   " | 14 |   " | refund | Joint Filers |
  " |   " | 43 |   " | refund | dependents=>3 |