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Florida Tax Calendar 2026: Federal Deadlines for FL Taxpayers

Cassandra de la Fe, CPA · May 8, 2026

Florida residents pay no state income tax, which removes one layer of annual compliance — but federal deadlines are identical to every other state, and two Florida-specific filings (sales tax and tangible personal property tax) create obligations that national tax calendars skip entirely. For self-employed Floridians and S-corp owners, 2026 also carries two time-sensitive federal windows that fall mid-year: the July 10, 2026 Kwong refund claim deadline and the July 4, 2026 Trump Account funding opening. This calendar maps every significant date for Florida-based individual and small-business filers. Our team handles year-round compliance for Miami and statewide Florida clients — see the Miami tax services hub for location-specific detail on how we work.

Why Florida Is Different (No State Income Tax)

Florida repealed its state income tax constitutionally. Article VII, Section 5 of the Florida Constitution prohibits the state from imposing a personal income tax. For federal filers, this means:

  • No state Form 1040 equivalent to file
  • No state quarterly estimated-tax payments to track
  • No state extension to request alongside a federal Form 4868

What remains is federal — plus two categories of Florida-specific business obligations that catch out-of-state owners and newly self-employed Floridians:

  1. Florida sales and use tax, administered by the Florida Department of Revenue, applies to most sales of tangible personal property and certain services. Monthly, quarterly, or annual filing depending on revenue volume.
  2. Florida tangible personal property (TPP) tax, administered by county property appraisers, applies to business equipment, furniture, and fixtures. Annual return due April 1 to each county where business property is located.

Neither obligation appears on federal tax calendars. Both carry penalties for late filing.

Q1 Federal Deadlines (January–April)

January 15 — Q4 2025 federal estimated tax payment due (Form 1040-ES). Florida self-employed and S-corp owners: this is your last 2025 estimated payment. If you underpaid 2025 quarterly estimates, consider paying now to reduce the IRC §6654 underpayment penalty before filing your return.

January 31 — W-2s and 1099-NECs to recipients and to the IRS. If you paid any contractor more than $600 in 2025 or have W-2 employees, these forms are due today. Florida has no state W-2 filing requirement.

March 17 — Partnership (Form 1065) and S-corp (Form 1120-S) returns due. This is the earliest major business deadline of the year. S-corp owners who want K-1s in hand before their personal return is filed need their entity return done now. Extension: Form 7004, which pushes the deadline to September 15.

April 15 — Individual 1040 and C-corp (Form 1120) returns due, plus Q1 2026 federal estimated tax payment. Extension of time to file: Form 4868 gives until October 15 for 1040s, but it does not extend the time to pay. Any tax owed is still due April 15 — the extension covers the paperwork, not the check.

Florida tangible personal property tax return due April 1 (county property appraiser). If your business owns equipment, office furniture, or fixtures in Florida, your county property appraiser expects a TPP return by April 1. Filing late triggers a 25% penalty; failing to file means the property appraiser assesses the value without your input. Per the IRS, federal Schedule C and 1120-S deductions for business property are separate from this Florida county obligation — you owe both filings independently.

Mid-Year Deadlines (May–August)

June 16 — Q2 2026 federal estimated tax payment. If your 2026 income is running ahead of 2025, recalculate this payment using actual year-to-date income rather than the prior-year safe harbor. The Q2 deadline is the most commonly underpaid quarter for self-employed Floridians because May and June are often strong revenue months.

July 4, 2026 — Trump Account funding window opens. Starting July 4, 2026, parents can fund §530A Trump Accounts and the federal $1,000 seed deposit begins processing for qualifying children. Any U.S. citizen child born between January 1, 2025 and December 31, 2028 with a valid SSN and a filed Form 4547 is eligible. Our Trump Account filing service prepares and e-files Form 4547 alongside your federal return — filing early means the account is open and funded when the July 4 window activates.

July 10, 2026 — Kwong protective refund claim deadline. This is the hard deadline for Form 843 protective refund claims under Kwong v. United States (179 Fed. Cl. 382, Nov. 25, 2025). IRC §7508A(d) mandatorily postponed federal tax deadlines during the COVID-19 disaster period (January 20, 2020 – July 10, 2023). If you paid failure-to-file penalties, failure-to-pay penalties, or underpayment interest on returns due during that window, July 10, 2026 is the last day to file Form 843 and preserve your refund rights. Per the National Taxpayer Advocate, tens of millions of taxpayers may qualify. Our Kwong refund claim service starts with a free eligibility screen — do not wait until late June, because IRS Form 843 is paper-only and USPS certified mail postmark must be on or before July 10.

August 1 — Second installment of Florida property tax discount period ends. Florida property owners who pay their property tax bill early receive discounts: 4% in November, 3% in December, 2% in January, 1% in February. The base deadline without discount is March 31. If you own commercial or investment property in Florida and missed the discount window, the base is still due — this is separate from the federal depreciation and property-expense deductions on your 1040 or 1120-S.

Q4 Federal Deadlines (September–December)

September 15 — Q3 2026 federal estimated tax payment, plus extended partnership (1065) and S-corp (1120-S) returns due. If you filed a Form 7004 extension in March, your entity return is due today. Do not confuse the extension deadline with the individual extension deadline — they differ.

October 15 — Extended individual 1040 returns due. If you filed Form 4868 in April, October 15 is the final deadline. No additional extension is available. After this date, the return is late with interest and late-filing penalties running from April 15.

October 15 — Extended C-corp (Form 1120) returns also due if the entity filed a Form 7004 in April.

November 17 — For calendar-year partnerships and S-corps that missed the September 15 extended deadline, there is no further extension. Returns filed after September 15 accrue failure-to-file penalties at $235 per partner/shareholder per month.

December 31 — Final date to contribute to a SEP-IRA, Solo 401(k), or employer-sponsored retirement plan for 2026, depending on the plan type. SEP-IRA contributions can be made up to the extended return deadline (October 15 for 1040 filers), but Solo 401(k) elective deferrals must be elected by December 31. Florida self-employed owners running profitable years should confirm contribution amounts at the Q4 planning call.

December 31 — Last day to file Form 4547 for children born in 2026, and the last day to fund a Trump Account for the year (though funding can continue through 2027 for 2026-born children). The IRS Trump Accounts portal provides updated guidance as Treasury releases additional implementation rules.

Florida-Specific Filings (Sales Tax, Tangible Personal Property)

Florida sales and use tax is reported and paid to the Florida Department of Revenue on a schedule determined by your annual tax liability. Monthly filers (over $1,000/year in sales tax) file by the 1st and must remit by the 20th of the following month. Quarterly filers report in January, April, July, and October. Annual filers report by January 20.

Florida Department of Revenue's sales tax page covers registration, rates (6% base rate plus county surtax), and electronic filing requirements. Florida requires e-filing for most businesses. Penalties for late sales tax remittance are 10% of the amount due for the first month, plus an additional 10% per subsequent month.

Tangible personal property tax is a county-level assessment (not a state-level filing) on all non-real-estate business property. File with your county property appraiser by April 1. The return requires an inventory of all business personal property, its original cost, and the year of acquisition. Property appraisers use Florida's depreciation tables to determine assessed value. If you believe the county's assessed value is incorrect, you have 25 days from the Notice of Proposed Property Taxes (typically mailed in August) to file a petition with the Value Adjustment Board.

For statewide Florida filers, especially those operating in Miami-Dade, Broward, and Palm Beach counties where county surtaxes vary, coordinating federal and Florida-specific compliance into a single year-round calendar prevents the most common missed-deadline penalties. See the resources hub for guides on the Kwong claim deadline and Trump Account setup that affect Florida taxpayers directly this year.

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