Key Takeaway: Florida corporate income tax depends on tax classification and Florida activity. The ordinary rate is 5.5%, generally after a $50,000 exemption, but filing can still be required when no tax is due. For affected returns, the 2026 federal-conformity changes require a recomputed starting figure, supporting schedules, and sometimes an amended return.
For the wider picture, see year-round tax planning with a Fort Lauderdale tax advisor.
Florida’s lack of an individual income tax does not eliminate business filing obligations. Start with the entity’s actual tax classification, its owners, and its activities. Then reconcile the federal and Florida calculations, determine the return and payment deadlines, and preserve evidence that each required submission was accepted.
Determine which entity and owner returns apply
C corporations, including LLCs taxed as C corporations, generally fall within Florida’s corporate income/franchise tax when conducting business, deriving income, or existing in Florida. Required filers generally must submit a return even if no tax is due. The Florida Department of Revenue filing guidance also addresses banks, political organizations filing federal Form 1120-POL, and tax-exempt organizations with unrelated business taxable income.
| Situation | Florida income-tax review |
|---|---|
| S corporation | Generally no Florida corporate income tax unless it has federal entity-level income-tax liability. Review the type of federal tax, not simply pass-through profit or the balance remaining after payments. |
| LLC taxed as a partnership | Florida Form F-1065 can be required when a corporate owner is involved; the corporate owner has its own Florida return analysis. |
| Disregarded single-member LLC | Generally no separate Florida corporate income-tax return. A corporate owner reports the LLC’s income with its own income. |
| Homeowner or condominium association | An association filing federal Form 1120 generally files a Florida corporate return even with no tax due. Filing federal Form 1120-H generally removes that Florida return requirement. |
The Department’s guidance refers to S-corporation tax on line 23c of federal Form 1120-S. That line is the tax total on the 2025 Form 1120-S, distinct from line 26’s balance owed. Use the relevant year’s form and instructions; a line number should not substitute for identifying the underlying entity-level liability.
A Florida partnership with a partner subject to the Florida Corporate Income Tax Code must file the partnership information return. A corporate partner reports its share of the applicable adjustments and apportionment data on its own return; filing one does not replace the other. See Form F-1065 and its instructions. Keep ownership records and election effective dates in the preparation file.
The 2026 statutory definition excludes charitable trusts from “corporation”; that is distinct from the treatment of a nonprofit corporation with unrelated business taxable income. See section 220.03(1)(e). Sales and use tax, reemployment tax, property-tax filings, and federal owner returns require separate review.
Apply the 2026 federal-conformity update first
Under section 220.03(1)(n), Florida adopts the Internal Revenue Code as of January 1, 2026, with specified exceptions. It retains the January 1, 2025 versions of sections 168(k), 174(a), 163(j), 274, and 179, without the later One Big Beautiful Bill Act amendments to those provisions. It excludes sections 168(n) and 174A.
Those exceptions affect bonus depreciation, research expenditures, business interest, certain disallowed expenses, section 179 expensing, and the new production-property and domestic-research provisions. Do not copy the filed federal taxable-income figure without reviewing their effect.
The Department’s July 7, 2026 TIP 26C01-01 directs affected taxpayers to recompute federal taxable income for line 1 of Form F-1120 and attach a pro forma federal return along with pages 1–6 of the filed federal return. Keep support for the recomputation. A Florida return already filed using a different basis may require Form F-1120X; document the amendment reason and review any resulting penalty with the Department.
Then apply the separate Florida modifications
The recomputation is followed by Florida additions and subtractions. For example, certain state income taxes deducted federally are added back. Under section 220.13(1)(e), applicable bonus depreciation for property placed in service before January 1, 2027 is added back, with the ordinary corresponding recovery spread equally over seven years beginning in the addition year.
Qualified improvement property has separate rules: do not automatically put it on that ordinary seven-year recovery schedule. Its applicable depreciation is added back and the Florida subtraction is determined under the specified pre-CARES Act basis. Keep federal, recomputed, and Florida asset schedules distinct, including prior-year recoveries. Review losses, credits, and other adjustments separately rather than assuming every difference reverses on the same timetable.
A useful workpaper has separate columns for the filed federal amount, conformity recomputation, Florida addition or subtraction, current-year effect, and any remaining recovery or carryforward. This makes it possible to see whether an item was omitted or counted twice.
Calculate Florida income, exemption, and tax
For a multistate business, adjusted income is generally apportioned using 50% sales, 25% property, and 25% payroll. Special industries, approved alternative methods, and absent or insignificant factors can change the calculation. Nonbusiness income allocated to Florida is treated separately. See section 220.15. A billing address alone does not establish all the sourcing and nexus conclusions needed for a multistate return.
The ordinary rate is 5.5%. A full-year taxpayer generally has a $50,000 exemption, limited by available income. A controlled group shares one exemption, consolidated returns receive one, and short-year exemptions are prorated. See Form F-1120 instructions, lines 9–13 and section 220.14. Special tax calculations and credit limits require their own analysis.
| Step | Amount |
|---|---|
| Florida income after all relevant adjustments, before exemption | $150,000 |
| Available exemption, assuming no controlled-group allocation | ($50,000) |
| Florida net income subject to ordinary tax | $100,000 |
| Tax at 5.5%, assuming no credits or special tax | $5,500 |
| Estimated payments already credited | ($4,500) |
| Balance before any penalty or interest | $1,000 |
The $150,000 is a tax calculation input, not gross receipts, book profit, or the bank balance. The $4,500 of estimates reduces the unpaid tax; it does not reduce taxable income by another $4,500. On accrual books, reconcile prepaid tax and tax-payable accounts to the tax provision and actual settlements. Paying the final $1,000 generally settles a liability already recorded rather than creating a second expense.
Choose the return and filing method
Form F-1120 is the standard return. The short Form F-1120A requires Florida net income of $45,000 or less and zero tax or less than $2,500 tax, plus all other eligibility conditions: all business in Florida, only permitted adjustments, no federal or Florida consolidated return, no disallowed credits, and no federal alternative minimum tax requirement. The permitted adjustments are generally the net operating loss deduction and state income taxes. This is not a gross-revenue threshold. See the Department’s short-form eligibility criteria.
Electronic filing and payment are mandatory if the taxpayer must file its federal income-tax return electronically or paid at least $5,000 in Florida corporate income tax during the prior Florida fiscal year, July 1–June 30. See the F-1120 instructions on electronic filing. Paper filing is not an unrestricted alternative for those taxpayers.
Use a supported filing route for the particular form. The Department’s corporate-tax e-services notice explains that payments moved to a new system effective June 1, 2026 while electronic return filing remained unchanged. A payment receipt is not proof of a filed return. Retain acceptance and payment confirmations separately, including the form, taxpayer, tax period, and settlement date.
Calendar returns, estimates, and extensions separately
Generally, Form F-1120 is due on the later of the first day of the fifth month after year-end or the fifteenth day after the related federal return’s unextended due date. Weekend and holiday rules apply. A standard calendar-year 2026 corporation therefore ordinarily files by May 3, 2027, since May 1 is Saturday. See section 220.222 and the filing instructions; disaster relief or special return types can alter a deadline.
June 30 year-ends changed for tax years beginning on or after January 1, 2026. The former fourth-month return deadline and seven-month extension apply to the earlier tax years specified in the statute. For the ordinary July 1, 2026–June 30, 2027 year, the return is due November 1, 2027 and may be extended to May 1, 2028. The July 2026 TIP also places the first estimated payment on November 30, 2026 if tax for the year is reasonably expected to exceed $2,500 before the third month of that tax year. Use that dated update when older general instructions still show the prior June 30 rule.
Estimated payments generally apply when annual Florida corporate income tax is expected to exceed $2,500. The Department’s corporate-tax due-date calendar lists the ordinary 2026 calendar-year installments as June 1, June 30, September 30, and December 31, 2026. For the year ending June 30, 2027, it lists November 30 and December 31, 2026, then March 31 and June 30, 2027. Review when the obligation first arises and the applicable installment calculation; do not automatically use federal quarterly dates.
For an ordinary filing extension, submit Florida Form F-7004 by the original due date and pay the required tentative balance. A federal extension alone is insufficient. Filing time is generally extended six months under the current rules; payment time is not. Underpaying tentative tax beyond the statutory tolerance can invalidate the extension. Confirm any special relief separately.
Florida Annual Reports vs Tax Filings is covered in more depth in our related article, “Florida Annual Reports vs. Federal and State Tax Filings.”
Distinguish the penalties and interest
- Late return: Generally 10% of unpaid tax for each month or fraction of a month, capped at 50%. If no tax is due, the late-return penalty is $50 per month or fraction, capped at $300. See the F-1120 penalty instructions.
- Underpaid estimates: The applicable penalty is calculated at 12% per year for the underpaid amount and period, with separate interest. It is not a flat 12% maximum. Review installment exceptions and the calculation on Form F-2220.
- Tentative tax during an extension: Underpayment can trigger its own penalty and interest or invalidate the extension. Underpayment exceeding the greater of $2,000 or 30% of tax shown on the return fails the ordinary payment-compliance test, subject to the statute’s credit calculation. See section 220.222(2)(d).
Reconcile payments by date as well as amount. A later payment can leave an earlier installment underpaid for part of the year. Use the applicable floating interest rates for the periods involved instead of assuming a single permanent rate.
Keep a complete preparation and submission file
- Entity classification, ownership changes, elections, and Florida activity analysis.
- Reconciled financial statements, general ledger, bank and card records, and book-to-tax reconciliation.
- Filed federal return, any required pro forma return, and separate Florida adjustment and recovery schedules.
- Property, payroll, sales, partnership, loss, and credit support needed for the state calculation.
- Estimated payments, prior-year credits, extension application, return acceptance, and payment confirmations.
- Notices, response deadlines, prior amendments, and unresolved questions assigned for follow-up.
When requesting a review from CPA Firm South Florida’s client team, identify the tax year, classification, bookkeeping condition, and any notices or planned transactions. Agree on preparation, cleanup, planning, and representation scope. Florida Department of Revenue representation and IRS representation concern different agencies and authorizations; neither should be assumed to be included in an unrelated engagement.
Frequently asked questions
Does an LLC automatically avoid Florida corporate income tax?
No. Its federal and Florida tax classification, ownership, and Florida activities determine the filing analysis. An LLC taxed as a corporation can have a corporate return, while a partnership or disregarded LLC follows a different path.
Does a zero balance mean no Florida return is required?
No. A filer subject to the return requirement generally must file even when exemptions, losses, credits, or payments leave no balance due. Separate exemptions from filing must be evaluated on their own terms.
Does Florida follow every new federal business deduction?
No. The 2026 conformity update preserves earlier versions of several provisions and excludes others. Affected filers must recompute the federal starting figure for Florida and then apply the separate Florida modifications.
Does a federal extension extend the Florida return?
A federal extension alone does not provide an ordinary Florida filing extension. Timely file Florida Form F-7004 and satisfy its payment conditions. An extension of filing time does not extend the ordinary tax-payment deadline.
Does a payment confirmation prove the return was filed?
No. Retain the accepted return submission and the payment confirmation separately, then reconcile the payment to the correct taxpayer, form, and tax period.