Florida Adopts the 2025 Internal Revenue Code for Corporate Income Tax

Florida Adopts the 2025 Internal Revenue Code for Corporate Income Tax

On December 1, 2025, the Florida Department of Revenue issued Tax Information Publication (TIP) 25C01-01, announcing Florida’s annual update to its corporate income tax conformity date. For tax years beginning in 2025, Florida adopts the Internal Revenue Code as amended and in effect on January 1, 2025.

Florida’s corporate income tax system is based on static conformity. Unlike rolling conformity states, Florida does not automatically incorporate federal tax law changes as they are enacted. Instead, the Florida Legislature periodically updates the conformity date through legislation, and the Department of Revenue issues a TIP explaining how that update applies in practice. TIP 25C01-01 serves as the Department’s official guidance for how the 2025 conformity update affects corporate taxpayers.

How Florida Corporate Income Tax Conformity Works

Florida corporate income tax begins with federal taxable income. That federal amount serves as the baseline for Florida tax calculations under Chapter 220, Florida Statutes. From there, Florida law requires specific additions, subtractions, and exclusions that frequently cause Florida taxable income to differ — sometimes significantly — from federal taxable income.

Conformity determines which version of the Internal Revenue Code is used to compute federal taxable income. It does not eliminate Florida’s independent statutory modifications. TIP 25C01-01 reinforces that distinction.

What Florida Does Adopt Under TIP 25C01-01

Under this conformity update, Florida adopts the Internal Revenue Code as it existed on January 1, 2025. This means that most federal provisions affecting income recognition, expense timing, accounting methods, and entity classification that were in effect as of that date are incorporated into Florida’s starting point for corporate income tax.

For many corporations, this adoption provides administrative consistency between federal and Florida returns at the initial computation stage. Income inclusions, ordinary and necessary business expenses, and general federal income calculation rules flow through to Florida before state-specific adjustments are applied.

What Florida Does Not Adopt

TIP 25C01-01 is equally important for what Florida does not adopt.

Federal tax legislation enacted after Florida’s 2025 legislative session — including provisions contained in the federal One Big Beautiful Bill Act — is not incorporated into Florida law. Even if those federal provisions apply retroactively for federal purposes, they have no effect on Florida corporate income tax unless the Florida Legislature affirmatively adopts them in a future session.

This timing mismatch is a recurring issue in Florida corporate income tax and often catches taxpayers off guard, particularly in years where Congress enacts sweeping federal tax changes late in the year.

Required Florida Addbacks and Subtractions That Continue to Apply

Regardless of the conformity date, Florida law requires several significant adjustments to federal taxable income.

Bonus Depreciation

Florida does not allow full federal bonus depreciation. Corporations must add back 100 percent of bonus depreciation claimed for federal purposes. Florida then permits recovery of that amount over a multi-year subtraction schedule. This adjustment alone can materially increase Florida taxable income in years with large capital investments.

Qualified Improvement Property

Florida also requires addbacks related to depreciation of qualified improvement property. Even when federal law allows accelerated depreciation or expensing, Florida limits the deduction to what would have been allowable under earlier versions of the IRC, creating long-term timing differences.

Business Meal Expense Limitations

Federal law has expanded deductions for certain business meal expenses, but Florida does not fully conform to those expansions. TIP 25C01-01 confirms that corporations must add back the portion of business meal deductions that exceed amounts allowable under pre-expansion federal law.

Federal Tax Credits

As a general rule, Florida does not recognize federal tax credits for corporate income tax purposes unless a specific Florida statute authorizes a corresponding credit. Even when a federal credit affects federal taxable income indirectly, Florida law often requires adjustments to neutralize that effect.

What’s New in TIP 25C01-01

While much of TIP 25C01-01 reiterates long-standing conformity principles, it does include a notable forward-looking change.

Beginning with tax years starting on or after January 1, 2026, charitable trusts are removed from Florida’s definition of “corporation.” As a result, charitable trusts will no longer be required to file Florida corporate income tax returns going forward. This change does not affect 2025 returns but has important compliance implications for future tax years.

Why This Conformity Update Matters

TIP 25C01-01 reinforces a core reality of Florida corporate income tax: conformity sets the starting point, not the final answer. Federal taxable income may anchor the calculation, but Florida’s statutory modifications ultimately determine tax liability.

Corporations with depreciation-heavy asset portfolios, complex expense structures, or exposure to late-year federal tax changes should pay particular attention to Florida’s annual conformity updates. Assumptions based solely on federal treatment frequently lead to Florida audit exposure.

© 2025 Jeanette Moffa. All rights reserved.