Florida DOR Sets 11% Interest Rate on Late Tax Payments for Early 2027

The Florida Department of Revenue has issued Tax Information Publication (TIP) 26ADM-06, dated October 21, 2026, announcing that the floating rate of interest is 11% for the period January 1, 2027, through June 30, 2027. The daily interest rate factor for the period is 0.000301370. The rate is subject to change effective July 1, 2027. 

For taxpayers with underpayments, late filings, or refund claims, this is the figure that drives the interest calculation on a wide range of Florida taxes and fees.

How the Floating Rate Works

Florida law provides for a floating rate of interest on deficiencies (underpayments), late payments, and overpayments of most taxes and fees. The rate is based on the adjusted prime interest rate charged by banks. Because the rate floats, it is reset periodically, and the Department publishes the current rate and its daily factor in a TIP.

The Department explains that the daily interest rate is considered a factor because it is not expressed as a percentage. Taxpayers multiply the tax due by the number of days late and then by the daily interest rate factor.

Rates for Deficiencies and Late Payments

The TIP lists 11% as the rate on deficiencies (underpayments) and late payments from January 1, 2026, through June 30, 2027, with a daily factor of 0.000301370. The prior rate was 12% for all of 2025 (daily factor 0.000328767) and for all of 2024 (daily factor 0.000327869). Before that, the rate was 11% for the second half of 2023, 9% for the first half of 2023, 7% for 2021 and 2022, and 9% for 2020.

For earlier periods, the TIP directs taxpayers to prior publications. TIP 19ADM-01 covers 2010 through 2019, TIP 09ADM-01 covers 2006 through 2009, and TIP 06ADM-03 covers 2000 through 2005. For periods on or before December 31, 1999, the rate is 12%, except for corporate income tax, for which taxpayers should contact Taxpayer Services. The TIP notes that rates on deficiencies and late payments may not exceed 12%.

Rates for Overpayments

The TIP also sets out the rates of interest on overpayments of tax. The rate is 11% from January 1, 2025, through June 30, 2027, with a daily factor of 0.000301370. The rate was also 11% for 2024 (daily factor 0.000300546) and for the second half of 2023. Earlier rates were 9% for the first half of 2023, 7% for 2021 and 2022, 9% for 2020 and 2019, 8% from July 2017 through December 2018, and 7% for the periods between January 2013 and June 2017.

Interest on overpayments may not exceed 11%, except for corporate income tax. The rate of interest on overpayments of corporate income tax is 12% for the period January 1, 2025, through December 31, 2025. Interest on overpayments of tax is not applicable to reemployment tax.

How to Calculate Interest Due

The TIP describes a three-step method for calculating interest due with a tax return:

1. Get the daily interest rate factor or factors for the applicable filing periods.
2. Calculate the number of days the return is late. Count from the “late after” date on the return through the date the return and payment are postmarked by the U.S. Postal Service or hand-delivered to the Department, including the day of the postmark or hand-delivery.
3. Multiply the amount of tax due by the number of days late and then by the appropriate daily interest rate factor or factors.

Example 1: A Single Interest Rate

A taxpayer owed $2,000 with the July 2026 Florida Sales and Use Tax Return, which was late after August 20, 2026. The taxpayer filed the return and paid the tax on September 10, 2026, making the return and payment 21 days late. Because the same daily factor applied for the entire period, the interest is calculated as $2,000 multiplied by 21 days multiplied by 0.000301370, for interest due of $12.66.

Example 2: A Rate That Changes Midstream

A taxpayer owed $4,000 with the November 2025 Florida Sales and Use Tax Return, which was late after December 20, 2025. The taxpayer filed the return and paid the tax on April 7, 2026, making the return and payment 108 days late. Two daily factors apply because the factor changed on January 1, 2026.

For the 11 days from December 21, 2025, through December 31, 2025, the factor is 0.000328767, and the interest is $4,000 multiplied by 11 multiplied by 0.000328767, or $14.47. For the 97 days from January 1, 2026, through April 7, 2026, the factor is 0.000301370, and the interest is $4,000 multiplied by 97 multiplied by 0.000301370, or $116.93. The total interest due is $131.40. This example shows why a late period that crosses a rate change must be calculated in separate parts.

Taxes and Fees Subject to the Floating Rate

The TIP lists the taxes and fees to which the floating rate applies. They include aviation fuel taxes, communications services tax, corporate income tax, documentary stamp tax (including surtaxes), estate tax, gross receipts tax on dry-cleaning facilities, gross receipts tax on utility services, and insurance premium tax and related taxes and levies. They also include intangible personal property taxes, lead-acid battery and waste tire fees, local option convention development taxes, local option food and beverage taxes, local option tourist development and tourist impact taxes, and Miami-Dade County Lake Belt Area fees.

The list continues with motor fuel and diesel fuel taxes, motor vehicle warranty fees, the prepaid wireless fee, pollutants taxes, reemployment tax, the rental car surcharge, sales and use tax (including discretionary sales surtax), and severance taxes.

Nature of the TIP

The Department states that the TIP is intended to alert taxpayers to the requirements in Florida laws and administrative rules. By its own effect, it does not create rights or require compliance.