SB1221 • 2026

tax laws; interpretation; application; hearing

SB1221 - tax laws; interpretation; application; hearing

Taxes

Vetoed

The latest official action shows the governor vetoed this bill. Check the bill history to see whether lawmakers later overrode that veto.

Sponsor: J.D. Mesnard
Last action: 2026-06-19
Official status: Governor vetoed
Effective date: Not listed

Plain English Breakdown

The official status indicates the bill was vetoed; it is unclear from this text alone whether lawmakers overrode that veto.

SB1221: Rules for New Tax Law Interpretations

This bill sets rules to stop the state from applying new tax interpretations backward and requires a public hearing before changes that hurt taxpayers take effect.

What This Bill Does

Requires the department or an affected taxpayer to notify legislative leaders if a new tax interpretation will negatively affect taxpayers in the future.
Mandates that if committee chairpersons hold a hearing on a proposed change, the department must explain why it is necessary before adopting it.
States that changes in how laws are interpreted apply only going forward unless the change helps the taxpayer.
Prohibits the state from charging taxes or penalties for past years based on these new interpretations.
Allows taxpayers to use this rule as a legal defense if the state tries to collect back taxes under a new interpretation.

Who It Names or Affects

Taxpayers in Arizona who pay taxes covered by Title 42 or Title 43 of the law.
The department responsible for collecting and enforcing tax laws.
Chairpersons of the Senate Finance Committee and the House Ways and Means Committee.

Terms To Know

Retroactively: Applying a rule to events that happened before the rule was made or announced.
Prospectively: Applying a rule only to future events, not past ones.
Affirmative defense: A legal argument that stops the government from collecting money even if they followed their own rules.

Limits and Unknowns

The governor vetoed this bill, so it did not become law unless lawmakers later overrode the veto.
Refunds for taxes paid before a new interpretation are only allowed if taxpayers prove someone else will pay them back.

Amendments

These notes stay tied to the official amendment files and metadata from the legislature.

HOUSE - Ways & Means (Adopted)

Adopted

Plain English: This amendment requires the state tax department to notify lawmakers and hold a public hearing before applying new rules that would negatively affect taxpayers.

The tax department must tell the chairs of the Senate Finance Committee and House Ways & Means Committee if they plan to use a new rule or interpretation that hurts taxpayers in the future.
If these lawmakers decide to hold a hearing about how the change affects people, the tax department must explain why the new rule is necessary.
The amendment adds a section stating that these hearings should help educate the public and increase transparency without making tax rules political.

The text does not specify what happens if lawmakers choose not to hold a hearing after being notified.
It is unclear how long taxpayers have to request refunds under the existing refund rule mentioned in Section C, as this amendment only adds new requirements for hearings.

HOUSE - Ways & Means (Proposed)

Proposed

Plain English: This amendment requires the state tax department to notify lawmakers and hold a public hearing before applying new rules that would negatively affect taxpayers.

The Department of Revenue must tell the chairs of the Senate Finance Committee and House Ways & Means Committee if they plan to use a new interpretation of tax law that hurts taxpayers in the future.
If lawmakers hold a hearing about this proposed change, the department must explain why the new rule is necessary.
Any new way of interpreting or applying tax laws will only apply going forward and cannot be used to charge taxes for past years unless it helps the taxpayer.

The amendment text includes a proposed Section 2 stating legislative intent, but this section is marked with carets indicating it may have been removed or altered in other versions of the bill.
Some specific details about how exactly taxpayers can request refunds under these new rules are not fully explained in the provided text.

Bill History

2026-06-12 V
Governor vetoed
2026-06-11 Senate
Senate passed
2026-06-11 Senate
Senate passed
2026-05-18 Senate
Senate minority caucus
2026-04-21 Senate
Transmitted to Senate
2026-04-21 House
House third read passed
2026-04-13 House
House committee of the whole
2026-03-31 House
House minority caucus
2026-03-31 House
House majority caucus
2026-03-03 House
House second read
2026-03-02 House
House Rules: C&P
2026-03-02 House
House Ways & Means: DPA
2026-03-02 House
House first read
2026-02-24 House
Transmitted to House
2026-02-24 Senate
Senate third read passed
2026-02-24 Senate
Senate committee of the whole
2026-02-03 Senate
Senate minority caucus
2026-02-03 Senate
Senate majority caucus
2026-02-02 Senate
Senate consent calendar
2026-01-21 Senate
Senate second read
2026-01-20 Senate
Senate Rules: PFC
2026-01-20 Senate
Senate Finance: DP
2026-01-20 Senate
Senate first read

Official Summary Text

SB1221 - tax laws; interpretation; application; hearing

Current Bill Text

Read the full stored bill text

SB1221 - 572R - H Ver

House Engrossed
Senate Bill

tax laws;
interpretation; application; hearing

State of Arizona

Senate

Fifty-seventh Legislature

Second Regular Session

2026

SENATE BILL 1221

AN
ACT

amending section 42-2078, Arizona Revised
Statutes; relating to taxpayer protection.

(TEXT OF BILL BEGINS ON NEXT PAGE)

Be it
enacted by the Legislature of the State of Arizona:

Section 1. Section 42-2078, Arizona Revised
Statutes, is amended to read:

START_STATUTE
42-2078.

New
interpretation or application of law; notice; hearing; affirmative defense;
definition

A. Unless expressly authorized by law, the
department shall not apply any newly enacted law retroactively or in a manner
that will penalize a taxpayer for complying with prior law.

B. If a proposed new interpretation
or application of any provision of this title or title 43 will adversely affect
taxpayers prospectively, the department shall, or an affected taxpayer may,
notify the chairpersons of the senate finance committee and the house of
representatives ways and means committee, or their successor committees, before
the new interpretation or application is adopted. If The
chairpersons of the senate finance committee and the house of representatives
ways and means committee, or their successor committees, hold a hearing on the
proposed new interpretation's or application's impact on taxpayers, the
department shall provide testimony regarding the reasons that the
interpretation or application is necessary.

B.
C.
If
the department adopts a new interpretation or application of any provision of
this title or title 43 or determines that any of those provisions applies to a
new or additional category or type of taxpayer, and the change in
interpretation or application is not due to a change in the law:

1. The change in interpretation or application
applies prospectively unless it is favorable to taxpayers.

2. The department shall not assess any tax, penalty
or interest retroactively based on the change in interpretation or application.

3. The change is an affirmative defense in any
administrative or judicial action for retroactive assessment of tax, interest
and penalties to taxable periods before the new interpretation or application
was adopted.

C.
D.
Tax
liabilities, penalties and interest paid before a new interpretation or
application of chapter 5 of this title by the department shall not be refunded
unless the taxpayer requesting the refund provides evidence satisfactory to the
department that the amounts will be refunded to the person who paid an added
charge to cover the tax.

D.
E.
For
the purposes of this section, "new interpretation or application"
includes policies and procedures adopted by administrative rule,
a
tax ruling,
a
tax procedure or
instructions to a tax return.
END_STATUTE

Sec. 2.
Legislative intent

The legislature intends that a hearing
held pursuant to section 42-2078, subsection B, Arizona Revised Statutes,
as added by this act:

1. Educate the public and
policymakers of a new interpretation or application of title 42 or 43, Arizona
Revised Statutes, before the new interpretation or application is implemented.

2. Provide an opportunity
for public input before a new interpretation or application of title 42 or 43,
Arizona Revised Statutes, takes effect.

3. Increase transparency
with regard to the interpretation and application of title 42 or 43, Arizona
Revised Statutes.

4. Not politicize the
administration of this state's tax code and not interfere with the
responsibilities outlined in the Constitution of Arizona.