Department of State Revenue Docket 260366 Other

in-20260930-IR-045260366NRA: DEPARTMENT OF STATE REVENUE

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Summary

Each year, the Indiana Department of Revenue Commissioner is required to establish the applicable interest rates for tax overpayments and underpayments that will take effect for the immediately succeeding calendar year. The purpose of this notice is to inform the public of the interest rates that will be effective beginning Jan. 1, 2027. Pursuant to IC 6-8.1-10-1, the rate of interest for an underpayment of tax and an excess tax payment is the percentage rounded to the nearest whole number that equals two percentage points above the average investment yield on state general fund money for the state's fiscal year ending June 30, 2026, excluding pension fund investments, as provided by the State Treasurer's office. The rate of interest for an underpayment of tax and an excess tax payment for calendar year 2027 will be 6%. A historical list of the above-calculated percentages is attached to this document. If you have any questions concerning this notice, please contact the Tax Policy Division at taxpolicy@dor.in.gov.

The agency’s own summary, as published.

The rule, in full

352 words as published, September 30, 2026. View the original →

DEPARTMENT OF STATE REVENUE Departmental Notice #3 September 2026 Effective Date: January 1, 2027 (Replaces Notice #3, dated January 1, 2026) SUBJECT: Interest Rates for Calendar Year 2027 REFERENCES: IC 6-8.1-10-1 SUMMARY OF CHANGES Each year, the Indiana Department of Revenue Commissioner is required to establish the applicable interest rates for tax overpayments and underpayments that will take effect for the immediately succeeding calendar year. The purpose of this notice is to inform the public of the interest rates that will be effective beginning Jan. 1, 2027. INTRODUCTION Pursuant to IC 6-8.1-10-1, the rate of interest for an underpayment of tax and an excess tax payment is the percentage rounded to the nearest whole number that equals two percentage points above the average investment yield on state general fund money for the state's fiscal year ending June 30, 2026, excluding pension fund investments, as provided by the State Treasurer's office. The rate of interest for an underpayment of tax and an excess tax payment for calendar year 2027 will be 6%. A historical list of the above-calculated percentages is attached to this document. If you have any questions concerning this notice, please contact the Tax Policy Division at taxpolicy@dor.in.gov. _________________________ Christopher W. Russell General Counsel Indiana Department of Revenue Historical Interest Rate List Year Overpayments Delinquent Payments 1989 10% 10% 1990 10% 10% 1991 10% 10% 1992 8% 8% 1993 7% 7% 1994 7% 7% 1995 4% 6% 1996 5% 7% 1997 5% 7% 1998 5% 7% 1999 5% 7% 2000 5% 7% 2001 6% 8% 2002 6% 8% 2003 4% 6% 2004 2% 4% 2005 1% 3% 2006 2% 4% 2007 (January 1 to June 30) 3% 5% 2007 (July 1 to December 31) 5% 5% 2008 7% 7% 2009 7% 7% 2010 4% 4% 2011 9% 9% 2012 4% 4% 2013 3% 3% 2014 3% 3% 2015 3% 3% 2016 2% 2% 2017 3% 3% 2018 3% 3% 2019 3% 3% 2020 4% 4% 2021 4% 4% 2022 3% 3% 2023 2% 2% 2024 4% 4% 2025 6% 6% 2026 2027 7% 6% 7% 6% Replaces Department Notice Document: 20251015-IR-045250475NRA

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