Wash. Admin. Code § 458-30-590 - [Effective 1/1/2025] Rate of inflation-Publication-Interest rate-Calculation

(1) Introduction. This rule provides the rates of inflation discussed in RCW 84.34.330 and WAC 458-30-550 Exemption-Removal or withdrawal. It also explains the department of revenue's (department) obligation to annually publish a rate of inflation and the manner in which this rate is determined.

(2) General duty of department - Basis for inflation rate. Each year the department determines and publishes a rule establishing an annual rate of inflation. This rate of inflation is used in computing the interest that is assessed when farm and agricultural or timber land, which are exempt from special benefit assessments, is withdrawn or removed from current use classification.

(a) The rate of inflation is based on the implicit price deflator for personal consumption expenditures calculated by the United States Department of Commerce. This rate is used to calculate the rate of interest collected on exempt special benefit assessments.

(b) The rate is published by December 31st of each year and applies to all withdrawals or removals from the farm and agricultural or timber land classifications that occur the following year.

(3) Assessment of rate of interest. An owner of classified farm and agricultural or timber land is liable for interest on the exempt special benefit assessment. Interest accrues from the date the local improvement district is created until the land is withdrawn or removed from classification. Interest accrues and is assessed in accordance with WAC 458-30-550.

(a) Interest is assessed only for the time (years and months) the land remains classified under RCW 84.34.020 (2) or (3).

(b) If the classified land is exempt from the special benefit assessment for more than one year, the annual inflation rates are used to calculate an average rate of interest. This average is determined by adding the inflation rate for each year the classified land was exempt from the special benefit assessment after the local improvement district was created. The sum of the inflation rates is then divided by the number of years involved to determine the applicable rate of interest.

(c) Example. A local improvement district for a domestic water supply system was created in January 2010 and the owner used the statutory exemption provided in RCW 84.34.320. On July 1, 2017, the land was removed from the farm and agricultural classification. An average interest rate was calculated using the inflation rates for 2010 through 2017. The owner was then notified of the amount of previously exempt special benefit assessment, plus the average interest rate.

(4) Rates of inflation. The rates of inflation used to calculate the interest as required by WAC 458-30-550 are as follows:

YEAR	PERCENT	YEAR	PERCENT
1976	5.6	1977	6.5
1978	7.6	1979	11.3
1980	13.5	1981	10.3
1982	6.2	1983	3.2
1984	4.3	1985	3.5
1986	1.9	1987	3.7
1988	4.1	1989	4.8
1990	5.4	1991	4.2
1992	3.3	1993	2.7
1994	2.2	1995	2.3
1996	2.2	1997	2.1
1998	0.85	1999	1.42
2000	2.61	2001	1.89
2002	1.16	2003	1.84
2004	2.39	2005	2.54
2006	3.42	2007	2.08
2008	4.527	2009	-0.85 (negative)
2010	1.539	2011	2.755
2012	1.295	2013	1.314
2014	1.591	2015	0.251
2016	0.953	2017	1.553
2018	2.169	2019	1.396
2020	0.602	2021	3.860
2022	6.457	2023	3.67
2024	2.57

Notes

Wash. Admin. Code § 458-30-590

Amended by WSR 14-01-059, filed 12/13/13, effective 1/1/2014 Amended by WSR 15-01-166, Filed 12/23/2014, effective 1/1/2015 Amended by WSR 16-01-035, Filed 12/9/2015, effective 1/1/2016 Amended by WSR 17-01-162, Filed 12/21/2016, effective 1/1/2017 Amended by WSR 18-01-147, Filed 12/20/2017, effective 1/1/2018 Amended by WSR 19-02-058, Filed 12/27/2018, effective 1/1/2019 Amended by WSR 20-02-056, Filed 12/24/2019, effective 1/1/2020 Amended by WSR 21-01-210, Filed 12/23/2020, effective 1/1/2021 Amended by WSR 22-04-028, Filed 1/24/2022, effective 1/1/2022 Amended by WSR 23-01-007, Filed 12/7/2022, effective 1/1/2023 Amended by WSR 24-03-001, Filed 1/3/2024, effective 1/3/2024 Amended by WSR 24-24-089, Filed 12/3/2024, effective 1/1/2025

Statutory Authority: RCW 84.34.360, 84.34.065, 84.34.141, and 84.69.100. 13-02-053, § 458-30-590, filed 12/26/12, effective 1/1/13; 12-01-040, § 458-30-590, filed 12/13/11, effective 1/1/12. Statutory Authority: RCW 84.34.360. 11-02-016, § 458-30-590, filed 12/29/10, effective 1/1/11; 10-02-027, § 458-30-590, filed 12/29/09, effective 1/1/10; 08-24-115, § 458-30-590, filed 12/3/08, effective 1/3/09; 08-04-050, § 458-30-590, filed 1/31/08, effective 3/2/08. Statutory Authority: RCW 84.34.360 and 84.34.310. 07-01-012, § 458-30-590, filed 12/7/06, effective 1/1/07; 05-24-119, § 458-30-590, filed 12/7/05, effective 1/1/06; 05-01-052, § 458-30-590, filed 12/7/04, effective 1/1/05; 03-24-076, § 458-30-590, filed 12/2/03, effective 1/2/04; 02-24-058, § 458-30-590, filed 12/3/02, effective 1/3/03; 02-03-041, § 458-30-590, filed 1/8/02, effective 2/8/02; 00-24-107, § 458-30-590, filed 12/6/00, effective 1/1/01; 99-24-035, § 458-30-590, filed 11/23/99, effective 12/24/99; 99-01-068, § 458-30-590, filed 12/14/98, effective 1/1/99; 98-01-179, § 458-30-590, filed 12/23/97, effective 1/1/98; 97-02-067, § 458-30-590, filed 12/31/96, effective 1/1/97; 96-01-094, § 458-30-590, filed 12/19/95, effective 1/1/96; 95-06-043, § 458-30-590, filed 2/24/95, effective 3/27/95. Statutory Authority: RCW 84.34.360. 94-11-098, § 458-30-590, filed 5/17/94, effective 6/17/94; 92-22-061, § 458-30-590, filed 10/29/92, effective 11/29/92. Statutory Authority: RCW 84.08.010 and 84.08.070. 90-24-087, § 458-30-590, filed 12/5/90, effective 1/5/91. Statutory Authority: Chapter 84.34 RCW and RCW 84.34.360. 89-05-010 (Order PT 89-3), § 458-30-590, filed 2/8/89. Statutory Authority: RCW 84.34.360. 88-07-004 (Order PT 88-4), § 458-30-590, filed 3/3/88; 87-07-009 (Order PT 87-3), § 458-30-590, filed 3/10/87.