The following rates of interest shall apply on refunds of taxes made pursuant to RCW
84.69.010 through
84.69.090 in accordance with RCW
84.69.100. The following rates shall also apply to judgments entered in favor of the plaintiff pursuant to RCW
84.68.030. The interest rate is derived from the equivalent coupon issue yield of the average bill rate for twenty-six week treasury bills as determined at the first bill market auction conducted after June 30th of the calendar year preceding the date the taxes were paid. The rate thus determined shall be applied to the amount of the judgment or the amount of the refund, until paid:
Year tax
paid | Auction
Year | Rate | |
| 1984 | 1983 | 9.29% | |
| 1985 | 1984 | 11.27% | |
| 1986 | 1985 | 7.36% | |
| 1987 | 1986 | 6.11% | |
| 1988 | 1987 | 5.95% | |
| 1989 | 1988 | 7.04% | |
| 1990 | 1989 | 8.05% | |
| 1991 | 1990 | 8.01% | |
| 1992 | 1991 | 5.98% | |
| 1993 | 1992 | 3.42% | |
| 1994 | 1993 | 3.19% | |
| 1995 | 1994 | 4.92% | |
| 1996 | 1995 | 5.71% | |
| 1997 | 1996 | 5.22% | |
| 1998 | 1997 | 5.14% | |
| 1999 | 1998 | 5.06% | |
| 2000 | 1999 | 4.96% | |
| 2001 | 2000 | 5.98% | |
| 2002 | 2001 | 3.50% | |
| 2003 | 2002 | 1.73% | |
| 2004 | 2003 | 0.95% | |
| 2005 | 2004 | 1.73% | |
| 2006 | 2005 | 3.33% | |
| 2007 | 2006 | 5.09% | |
| 2008 | 2007 | 4.81% | |
| 2009 | 2008 | 2.14% | |
[Statutory Authority: RCW 84.69.100. 08-24-094, § 458-18-220, filed 12/2/08, effective 1/2/09; 07-24-037, § 458-18-220, filed 11/30/07, effective 12/31/07; 06-21-059, § 458-18-220, filed 10/16/06, effective 11/16/06; 05-22-096, § 458-18-220, filed 11/1/05, effective 12/2/05; 04-24-101, § 458-18-220, filed 12/1/04, effective 1/1/05; 03-24-014, § 458-18-220, filed 11/20/03, effective 12/21/03; 02-23-081, § 458-18-220, filed 11/19/02, effective 12/20/02; 02-03-039, § 458-18-220, filed 1/8/02, effective 2/8/02; 00-24-106, § 458-18-220, filed 12/6/00, effective 12/31/00; 99-24-033, § 458-18-220, filed 11/23/99, effective 12/24/99. Statutory Authority: RCW 84.08.010, 84.08.070 and 84.69.100. 99-01-066, § 458-18-220, filed 12/14/98, effective 1/1/99; 98-01-177, § 458-18-220, filed 12/23/97, effective 1/1/98; 97-02-068, § 458-18-220, filed 12/31/96, effective 1/1/97; 96-01-093, § 458-18-220, filed 12/19/95, effective 1/1/96; 95-06-044, § 458-18-220, filed 2/24/95, effective 3/27/95; 94-05-063, § 458-18-220, filed 2/11/94, effective 3/14/94. Statutory Authority: RCW 84.08.010 and 84.69.100. 93-06-096, § 458-18-220, filed 3/3/93, effective 4/3/93; 92-17-027, § 458-18-220, filed 8/11/92, effective 9/11/92; 91-15-024, § 458-18-220, filed 7/11/91, effective 8/11/91. Statutory Authority: RCW 84.69.100 and 84.08.010(2). 89-10-067 (Order PT 89-6), § 458-18-220, filed 5/3/89; 88-07-003 (Order PT 88-3), § 458-18-220, filed 3/3/88. Statutory Authority: RCW 84.69.100 as amended by 1987 c 319 and 84.08.010(2). 87-19-141 (Order PT 87-7), § 458-18-220, filed 9/23/87.]