Department of Revenue
Chapter 150
Division 305
GENERAL ADMINISTRATION OF REVENUE LAWS — MULTISTATE TAX COMPACT
150-305-0140
Interest on Deficiencies and Delinquencies
(1) Adjustment to statutory rate. For deficiencies and delinquencies owing on or after January 1, 2024, unless otherwise provided by law, every deficiency and delinquency arising under any law administered by the department will bear interest at the rate of eight percent annually. For historic interest rates, see section (4) of this rule.
(2) Interest start date. The interest start date for deficiencies and delinquencies will be one day after the due date of the return, excluding extensions.
(3) Interest periods.
(a) An interest period is one full calendar day beginning with the interest start date. Interest will be computed on a daily basis. The daily rate is based on a 365-day year.
(b) The daily interest rate is calculated by dividing the annual interest rate by 365 without rounding.
(4) Interest rates. The following table shows interest rates used by the department to compute interest due from taxpayers on deficiencies and delinquencies.
Percentage Rates.
Effective date - Annual rate - Monthly rate - Daily rate
Prior to January 1, 1969 — 6 — 0.5 — —
January 1, 1969 — 8 — 0.6667 — —
September 13, 1975 — 12 — 1.0 — —
June 1, 1982 — 18 — 1.5 — 0.0493
August 1, 1986 — 17 — 1.4167 — 0.0466
January 1, 1987 — 16 — 1.3333 — 0.0438
January 1, 1988 — 11 — 0.9167 — 0.0301
January 1, 1993 — 8 — 0.6667 — 0.0219
January 1, 1995 — 10 — 0.8333 — 0.0274
January 1, 1999 — 9 — 0.75 — 0.0247
January 1, 2001 — 10 — 0.8333 — 0.0274
February 1, 2002 — 8 — 0.6667 — 0.0219
February 1, 2003 — 7 — 0.5833 — 0.0192
January 1, 2004 — 6 — 0.5 — 0.0164
January 1, 2005 — 5 — 0.4167 — 0.0137
January 1, 2006 — 7 — 0.5833 — 0.0192
January 1, 2007 — 9 — 0.75 — 0.0247
January 1, 2009 — 6 — 0.5 — 0.0164
January 1, 2010 — 5 — 0.4167 — 0.0137
January 1, 2013 — 4 — 0.3333 — 0.0110
January 1, 2017 — 5 — 0.4167 — 0.0137
January 1, 2018 — 5 — N/A — 0.0137
January 1, 2019 — 6 — N/A — 0.0164
January 1, 2021 — 4 — N/A — 0.0110
January 1, 2023 — 6 — N/A — 0.0164
January 1, 2024 — 8 — N/A — 0.0219
The daily interest rates shown above are rounded for illustrative purposes.
Example 1: Tom filed a 2016 return reporting tax to pay of $500. He made a $500 payment on February 25, 2019. The interest start date is April 19, 2017, the first day after the due date of the return, which was April 18, 2017. Interest is computed on a daily basis as follows:
4/19/17-12/31/2018 (Annual interest rate / 365 days) x number of days x tax due
(5% / 365) x 622 days x $500 = $42.57
1/1/2019-2/24/19 (Annual interest rate / 365 days) x number of days x tax due
(6% / 365) x 55 days x $500 = $4.52
Total interest: $47.09
Statutory/Other Authority: ORS 305.100 & 305.220
Statutes/Other Implemented: ORS 305.220
History:
REV 23-2023, amend filed 12/26/2023, effective 01/01/2024
REV 30-2022, amend filed 12/20/2022, effective 01/01/2023
REV 43-2020, amend filed 12/23/2020, effective 01/01/2021
REV 31-2018, amend filed 12/31/2018, effective 01/01/2019
REV 73-2017, amend filed 12/22/2017, effective 01/01/2018
REV 81-2016, f. 12-28-16, cert. ef. 1-1-17
Renumbered from 150-305.220(1), REV 47-2016, f. 8-13-16, cert. ef. 9-1-16
REV 3-2013, f. & cert. ef. 3-28-13
REV 10-2012, f. 12-18-12, cert. ef. 1-1-13
REV 9-2009, f. 12-21-09, cert. ef. 1-1-10
REV 16-2008, f. 12-26-08, cert. ef. 1-1-09
REV 11-2006, f. 12-27-06, cert. ef. 1-1-07
REV 5-2005, f. 12-30-05, cert. ef. 1-1-06
REV 10-2004, f. 12-29-04, cert. ef. 12-31-04
REV 4-2003, f. & cert. ef. 12-31-03
REV 9-2002, f. 12-31-02, cert. ef. 1-31-03
REV 9-2001, f. 12-31-01, cert. ef. 2-1-02
REV 12-2000, f. & cert. ef. 12-29-00, cert. ef. 12-31-00
REV 7-1998, f. 11-13-98, cert. ef. 12-31-98
RD 7-1994, f. 12-15-94, cert. ef. 12-30-94
RD 5-1993, f. 12-30-93, cert. ef. 12-31-93
RD 7-1992, f. & cert. ef. 12-29-92
RD 12-1990, f. 12-20-90, cert. ef. 12-31-90
RD 11-1988, f. 12-19-88, cert. ef. 12-31-88
RD 14-1987, f. 12-18-87, cert. ef. 1-16-88
RD 8-1986, f. & cert. ef. 12-31-86
RD 2-1986, f. 7-2-86, cert. ef. 8-1-86