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GILTI to NCTI, State Tax Codes Decouple

Some States Will Tax NCTI Despite Prior Votes to Exempt International Income

Several states have decoupled from GILTI by name rather than statutory citation. Lawmakers in those states should amend these statutes to ensure that their tax code does not accidentally incorporate a much more aggressive tax on international income than the tax from which they previously decoupled.

6 min read
Washington DC council decoupling tax code OBBBA

DC Should Be Judicious About Decoupling from the OBBBA

While the Council of DC is right to consider decoupling its tax code from several revenue-reducing provisions in the OBBBA, they should maintain conformity with the business expensing reforms that are strongly pro-growth, better align with sound tax principles, and primarily change the timing of revenues.

4 min read
2025 state estate tax rates and 2025 state inheritance tax rates

Estate and Inheritance Taxes by State, 2025

In addition to the federal estate tax, which has a top marginal rate of 40 percent, 12 states and the District of Columbia impose estate taxes, while five states levy inheritance taxes.

8 min read
Massachusetts Lawmakers Should Focus on Sound Tax Reform Rather than Double Taxing Business Income

Massachusetts Lawmakers Should Focus on Sound Tax Reform Rather than Double Taxing Business Income

Massachusetts lawmakers should look for opportunities to reform the tax code, revamp the state’s competitiveness, and stem the tide of outmigration. This bill, by contrast, would double down on the economically uncompetitive features of the Commonwealth’s existing tax code. Aggressively expanding NCTI inclusion is not productive or competitive.

5 min read

The Big Beautiful Bill’s Impact on State Taxes, Explained

Congress may have passed the One Big Beautiful Bill Act (OBBBA), but state lawmakers now face big choices. Most states link their tax codes to the federal system, meaning OBBBA’s provisions—good and bad—are about to ripple across state budgets.

One Big Beautiful Bill state tax impact including state tax conformity and state tax revenue state tax implications

State Tax Implications of the One Big Beautiful Bill Act

For Congress, work on the One Big Beautiful Bill Act is done. But in state capitols, the work has not yet begun. Many of the tax changes in the federal reconciliation act flow through to state tax codes—automatically in some states, and subject to an update in states’ Internal Revenue Code conformity date in others.

39 min read
OBBBA business expensing state tax codes 2025 One Big Beautiful Bill Business Expensing State Tax Conformity Questions

The OBBBA Gets Expensing Right. States Should Follow Suit.

However states choose to respond to other tax provisions of the One Big Beautiful Bill Act, they should conform to the pro-growth provisions, which represent a marked improvement in the corporate tax code.

12 min read
State Implications of the GILTI to NCTI Conversion The One, Big, Beautiful Bill’s (OBBB) changes to the taxation of international income

State Implications of the GILTI to NCTI Conversion

The One Big Beautiful Bill’s changes to the taxation of international income have surprising implications for state codes, yielding tax increases and a revised tax base that, through quirks of state incorporation, bears very little resemblance to the federal base and almost nothing of its purpose.

10 min read
New jersey tax relief, gubernatorial election 2025

New Jersey Taxpayers Deserve Tax Relief

New Jersey’s residents deserve tax relief, and the state must stem the tide of out-migration. Affordable reforms in the near term could pave the way for more sweeping, and competitive, reforms to take root in the future.

State Implications of the One Big Beautiful Bill No Tax on Car Loan Interest SNAP Cost Sharing No Tax on Tips and Overtime Medicaid Reductions for States Covering Undocumented Immigrants

State Implications of the One, Big, Beautiful Bill

As the US House hashes out its “One, Big, Beautiful Bill,” statehouse lawmakers are watching closely, given the impact of both its tax and spending provisions on state budgets.

12 min read
Oregon Considers Decoupling from the Federal Tax Code Oregon tax conformity

Oregon Considers Decoupling from the Federal Tax Code

The proposed changes to federal tax code conformity in Oregon are a good example of a change that could significantly reshape the state’s tax code in the future, despite being framed as temporary technical adjustments.

4 min read
Tennessee business tax reform and Tennessee sales tax holiday

Tennessee Looking Toward Pro-Growth Change in 2023

With other states upping their game to attract ever-more-mobile people and businesses, lawmakers and the governor are not content to leave Tennessee’s business taxes in their current, uncompetitive form.

7 min read
section 179 expensing state tax conformity section 168 Oklahoma State Capital Building

Oklahoma Becomes First State in Nation to Make Full Expensing Permanent

Gov. Stitt signed into law a pro-growth bill that will set the state apart from its peers. Other states should look to follow Oklahoma’s example and make full expensing permanent to maintain their competitiveness in an increasingly mobile economy.

3 min read