Key Biscayne property tax: where it goes
A Key Biscayne house pays 1.546% of its taxable value in property tax. For a house at $925,302 of value before exemptions with the homestead exemption, that's about $13,688 a year.
Tax is levied on the Miami-Dade Property Appraiser's taxable value; Key Biscayne millage code 2400 totals 15.4636 mills in the 2026 adopted rates.
Who taxes this house
| Taxing agency | Rate | On $925,302 |
|---|---|---|
| Village of Key Biscayne | 0.2871% | $2,509 |
| Miami-Dade County School Board (operating) (schools) | 0.5499% | $4,951 |
| Miami-Dade County School Board (voted operating) (schools) | 0.1% | $900 |
| Miami-Dade County School Board (debt service) (schools) | 0.0124% | $112 |
| South Florida Water Management District | 0.0095% | $83 |
| Everglades Construction Project | 0.0033% | $29 |
| Okeechobee Basin | 0.0103% | $90 |
| Florida Inland Navigation District | 0.0027% | $24 |
| Miami-Dade County (countywide operating) | 0.4574% | $3,997 |
| Miami-Dade County (countywide debt service) | 0.0394% | $344 |
| Miami-Dade Public Library System | 0.0281% | $246 |
| The Children's Trust | 0.0464% | $405 |
| Total | 1.546% | $13,688 |
2026 tax year (Village millage for fiscal year 2026-27), Miami-Dade County millage code 2400 (Key Biscayne). Exemptions applied: Homestead exemption (first $25,000) ($25,000); Additional homestead exemption (up to $26,411, on assessed value between $50,000 and $76,411) ($26,411).
Ways to pay less
- Seniors 65+ with income up to $38,686: senior exemption. The Senior Exemption is an additional benefit for homestead owners: at least one owner must be 65 by January 1, and total household adjusted gross income in the previous year, 2025, cannot exceed $38,686. Senior exemption benefits are a local option: county and city governments (not the School Board) choose whether to grant them. How: Apply online with the Miami-Dade Property Appraiser, or on form DR-501 (Age 65 and Older with Limited Income) with the household income statement DR-501SC.
- $5,000 exemptions for widowed, blind and disabled owners and disabled veterans. Miami-Dade lists $5,000 exemptions for an un-remarried widow or widower, for blind owners, for owners totally and permanently disabled as of January 1, and for veterans with a service-connected disability rated at 10% or more; service-connected totally and permanently disabled veterans have a separate exemption. How: See the Miami-Dade Property Appraiser's list of available exemptions and application requirements.
- Pay your tax bill in November for 4% off. Florida law gives a 4% discount for payment in November, 3% in December, 2% in January and 1% in February; there is no discount in March. How: Pay your property tax bill in November.
Dates
| When | What |
|---|---|
| Nov 1 (in 9 days) | Property taxes are due November 1; paying in November takes 4% off (3% in December, 2% in January, 1% in February). |
| Mar 1 | Deadline to file for the homestead exemption with the Miami-Dade Property Appraiser; timely exemption applications are accepted through March 1. |
| Apr 1 | Unpaid property taxes become delinquent on April 1, or 60 days after the original tax notice is mailed if that is later. |
| Sep 20 | Late exemption applications can be filed from March 2 until the deadline on your August notice, which is on or before September 20. |
Pay or manage it
Sources
- srcpa.gov exemptions
- www.leepa.org CPI%20Homestead%20Exemption.pdf
- www.miamidadepa.gov homestead.page
- www.miamidadepa.gov exemption-requirements.pdf
- www.miamidadepa.gov 2026-average-and-median-homestead-reside
- www.miamidadepa.gov 2026-adopted-millage-chart.pdf
Checked October 22, 2026. Every number here comes from the public sources listed, matched by our checker.
Rates change every year; this page shows when it was last checked. Nothing here is legal, tax or insurance advice.