Florida Corporate Income Tax: Rates, Filing, and Credits

Florida’s corporate income tax is a flat 5.5 percent, applied to a corporation’s federal taxable income after Florida-specific adjustments and a $50,000 exemption.¹² A corporation with $50,000 or less in Florida net income owes nothing. A corporation with $100,000 in Florida net income pays 5.5 percent on the $50,000 above the exemption, or $2,750. The return is Form F-1120, due on the first day of the fifth month after the taxable year closes.

Who Has to File

Every C corporation that earns income in Florida or conducts business in the state must file Form F-1120, including foreign corporations chartered elsewhere that operate within Florida’s borders. The filing obligation applies even when the exemption and credits wipe out any tax owed.

S corporations usually do not file. The exception is an S corporation with a federal corporate-level tax liability, such as the built-in gains tax or the excess net passive income tax. Without that federal liability, no Florida return is required.³

LLCs follow their federal classification. An LLC taxed as a corporation files Form F-1120. A single-member LLC that is disregarded federally does not file separately, though a corporate owner must fold the LLC’s income into its own return. An LLC taxed as a partnership files Form F-1065 only when one or more of its partners is a corporation.⁴

Some less obvious entities also file. Homeowners and condominium associations that file federal Form 1120 must file in Florida every year, whether or not they owe tax. Political organizations that file federal Form 1120-POL must file as well. Otherwise tax-exempt nonprofits file only if they have unrelated business taxable income reported on federal Form 990-T.³

How Florida Taxable Income Is Calculated

Florida does not build its own income calculation from scratch. The starting point is federal taxable income from the corporation’s federal return. A series of Florida-specific adjustments produces what the state calls adjusted federal income, which is what the 5.5 percent rate ultimately hits.

Additions and Subtractions

The biggest common addition is state income taxes. Any state income tax the corporation deducted when computing federal taxable income gets added back; Florida will not let its own tax base shrink because of taxes paid to other states.⁵ Tax-exempt interest from state and local bonds is also added back, with the associated disallowed expenses then subtracted. Corporations that claim certain Florida credits must add the credit amounts back to income as well.

Subtractions pick up income Florida specifically excludes, such as certain foreign-source income and dividends that received special federal treatment. The net result feeds either directly into the tax calculation for a Florida-only corporation or into the apportionment formula for a multistate filer.

Apportionment for Multistate Businesses

A corporation doing business both inside and outside Florida apportions adjusted federal income using a three-factor formula: sales at 50 percent, property at 25 percent, and payroll at 25 percent.⁶ The heavier weight on sales means a company with many Florida customers but few employees or assets in the state can still have a meaningful share of income apportioned here. Most of the complexity of a multistate filing lives in the apportionment schedule.

Net Operating Losses

A loss year is not wasted. Florida allows net operating losses from taxable years beginning after December 31, 2017, to be carried forward indefinitely. Losses generated before that date carried forward for 20 years.⁷

There is a cap on how much a post-2017 loss can absorb in any given year: 80 percent of remaining Florida tentative adjusted federal income, mirroring the federal rule. Pre-2018 losses apply first without that percentage limit, and the 80-percent cap then applies to any remaining post-2017 losses.⁷ A corporation relying solely on post-2017 carryforwards will always have some taxable income in a profitable year.

When to Pay and When to File

If a corporation expects its Florida liability for the year to exceed $2,500, it must make quarterly estimated payments.⁸ That threshold corresponds to roughly $95,500 of taxable income above the exemption, so it reaches more businesses than the dollar figure suggests.

For calendar-year filers, the four installment due dates are:

First installment: May 31
Second installment: June 30
Third installment: September 30
Fourth installment: December 31

Each installment should equal one quarter of the total estimated liability. A corporation avoids penalty and interest on estimated payments if cumulative amounts paid by each due date reach at least 90 percent of the tax ultimately shown on the return, or the full amount that would have been owed using the prior year’s income and the current year’s rate.⁸ The prior-year safe harbor is useful when revenue is hard to predict.

The annual return is due on the first day of the fifth month after the taxable year closes. A calendar-year corporation files by May 1. A corporation with a fiscal year ending June 30 files by November 1.⁹

An extension of up to six months is available by filing Florida Form F-7004 before the original due date. A federal extension does not automatically extend the Florida deadline; the state form has to be filed separately even if federal Form 7004 is already on file.¹⁰ The extension gives more time to file but not more time to pay. Any unpaid balance accrues interest at the state’s floating rate from the original due date until paid.

Electronic Filing

Electronic filing and payment are mandatory if the corporation paid $5,000 or more in Florida corporate income tax during the prior state fiscal year (July 1 through June 30). Corporations required to file their federal return electronically must also e-file their Florida return regardless of the dollar amount.⁴ Filing goes through the IRS Modernized e-File program using approved software.⁸ Smaller filers can e-file voluntarily or mail paper returns to the Department of Revenue.

Penalties and Interest

Florida imposes two stacked consequences for underpaying estimated tax: interest at the Department of Revenue’s floating rate, and a flat penalty of 12 percent per year on the underpayment.¹¹ The floating rate is 11 percent for the second half of 2026, so an underpayment during that period effectively costs about 23 percent annualized until it is cleared.¹²

The safe harbors are the only way out. Meeting the 90-percent-of-current-year or prior-year-income test by each installment deadline shields the corporation from penalty and interest even if a balance is still owed when the return is filed. Missing a single installment deadline can trigger charges on that period’s shortfall.

Late filing or late payment of the return itself brings additional penalties on top of interest at the floating rate running from the original due date. Delay is expensive.

Credits That Reduce the Bill

Florida offers several credits that reduce the corporate income tax dollar for dollar. Most target activities the state wants to encourage, and most carry forward if they exceed the current year’s liability rather than generating a refund. Many are allocated statewide on a first-come, first-served basis, so timing of the application matters.¹³

Research and Development Credit, for qualified research in Florida; capped at 50 percent of the corporation’s Florida income tax liability after other credits.
Capital Investment Tax Credit, for projects with at least $25 million in cumulative capital investment; up to 5 percent of eligible capital costs annually for up to 20 years.
Community Contribution Tax Credit, equal to 50 percent of a qualified donation to an eligible community development sponsor; capped at $200,000 per business per year with a five-year carryforward.
Rural Job Tax Credit, ranging from $1,000 to $1,500 per qualified employee, capped at $500,000 per calendar year with a five-year carryforward.
Contaminated Site Rehabilitation Credit, covering 50 percent of cleanup costs up to $500,000 per site per year, with a five-year carryforward.

Scholarship and social-program credits are also available, including credits for contributions to the Florida Tax Credit Scholarship Program, the Strong Families Tax Credit Program, and the Live Local Program.¹³

1
Florida Dept. of Revenue. Florida Tax and Interest Rates
2
Florida Senate. Florida Code 220.14 – Exemption
3
Florida Administrative Code. Florida Administrative Code R 12C-1.022 – Returns; Filing Requirement
4
Florida Department of Revenue. Corporate Income Tax
5
The Florida Legislature. Florida Code 220.13 – Adjusted Federal Income
6
The Florida Legislature. Florida Code 220.15 – Apportionment of Adjusted Federal Income
7
Florida Department of Revenue. Tax Information Publication TIP 21C01-01R
8
Florida Department of Revenue. Instructions for Corporate Income/Franchise Tax Return
9
The Florida Legislature. Florida Code 220.222 – Returns; Time and Place for Filing
10
Florida Department of Revenue. Florida Form F-7004
11
The Florida Legislature. Florida Code 220.34 – Penalties for Failure to Pay Estimated Tax
12
Florida Department of Revenue. Floating Rate of Interest – TIP 26ADM-02
13
Florida Department of Revenue. Corporate Income Tax Incentives