All Florida countiesBased on the 2026 certified tax roll and 2025 tax rates
Monroe CountyAmendment 3Tax Calculator
Property search and homestead exemption estimates
All Florida countiesBased on the 2026 certified tax roll and 2025 tax ratesAn estimate of how Amendment 3's larger homestead exemption could change ad valorem property tax revenue for the City of Marathon, based on 2026 property values and the 2025 city tax rate of 2.0631 mills.
Illustrative estimates only. These figures are meant to illustrate how Amendment 3 could affect the City of Marathon based on current data. They are not official. For official information about the City of Marathon's budget, tax rate and revenue, contact the City of Marathon directly. For official property values and exemptions, contact the Monroe County Property Appraiser.
Homestead assessed values rise by up to 3% a year, the most Save Our Homes allows, but never above each home's 2026 just (market) value. All other property stays at its 2026 taxable value. The city's tax rate stays at its 2025 level. The gross levy is taxable value times the tax rate. The budget basis is 95% of the gross levy, which allows for early-payment discounts and unpaid taxes; see the limitations below.
| Year | Homestead taxable value | Other taxable value | Total taxable value | Gross levy | Budget basis (95%) | Change from 2026 (95%) | Percent change |
|---|---|---|---|---|---|---|---|
| 2026 | $842,241,237 | $4,435,188,668 | $5,277,429,905 | $10,887,866 | $10,343,472 | — | — |
| 2027 (estimate) | $712,959,260 | $4,435,188,668 | $5,148,147,928 | $10,621,144 | $10,090,087 | −$253,386 | −2.4% |
| 2028 (estimate) | $597,165,733 | $4,435,188,668 | $5,032,354,401 | $10,382,250 | $9,863,138 | −$480,335 | −4.6% |
| Year | Homestead taxable value | Other taxable value | Total taxable value | Gross levy | Budget basis (95%) | Change from 2026 (95%) | Percent change |
|---|---|---|---|---|---|---|---|
| 2026 | $842,241,237 | $4,435,188,668 | $5,277,429,905 | $10,887,866 | $10,343,472 | — | — |
| 2027 (estimate) | $693,488,584 | $4,435,188,668 | $5,128,677,252 | $10,580,974 | $10,051,925 | −$291,547 | −2.8% |
| 2028 (estimate) | $561,094,317 | $4,435,188,668 | $4,996,282,985 | $10,307,831 | $9,792,440 | −$551,033 | −5.3% |
Of Monroe County's five cities, the City of Marathon has the second-largest estimated percentage change in city ad valorem revenue by 2028. The estimated change is −4.6%. Two things determine its size.
How much of the city's taxable value comes from homesteads. The amendment changes the exemption only for homesteads. Property without a homestead exemption, such as rentals, businesses, second homes and vacant land, keeps its taxable value. In the City of Marathon, homesteads make up 16.0% of taxable value in 2026, the second-lowest share of the five. Among the five, the share ranges from 15.1% to 19.7%.
How much of that homestead value the new exemption removes. Because the exemption is a flat dollar amount, it removes a larger share of value from homes with lower assessed values. The median homestead in the City of Marathon has an assessed value of $422,900, the lowest of the five. By 2028, the new exemption is estimated to remove 29.1% of the city's homestead taxable value. Among the five, this ranges from 17.9% to 37.6%.
Across the county, places where homesteads make up a larger share of taxable value generally have larger estimated percentage changes. Home values also play a part. Marathon has the lowest median homestead assessed value; the exemption removes 29.1% of its homestead taxable value, and its estimated percentage change is the second-largest of the five.
| City or town | Homestead share of taxable value, 2026 | Median homestead assessed value | Homestead taxable value removed by 2028 | Estimated revenue change by 2028 |
|---|---|---|---|---|
| Village of Islamorada | 19.7% | $582,002 | 17.9% | −3.5% |
| City of Key West | 18.2% | $534,050 | 24.9% | −4.5% |
| City of Layton | 18.1% | $442,912 | 37.6% | −6.8% |
| City of Marathon | 16.0% | $422,900 | 29.1% | −4.6% |
| City of Key Colony Beach | 15.1% | $624,430 | 19.7% | −3.0% |
Sorted by homestead share of taxable value. Estimates use homestead assessed values rising by up to 3% a year, capped at just value and the 2025 municipal tax rates.
| Year | Homestead exemption | Homesteads with $0 city taxable value | Share of homesteads | Median city tax per homestead | Homestead share of city taxable value |
|---|---|---|---|---|---|
| 2026 | up to $51,411 | 5 | 0.3% | $766 | 16.0% |
| 2027 (estimate) | $150,000 | 107 | 6.9% | $587 | 13.8% |
| 2028 (estimate) | $250,000 | 317 | 20.4% | $396 | 11.9% |
Estimates use homestead assessed values rising by up to 3% a year, capped at just value. Median city tax counts only the city's own millage, not county, school or other taxes.
Florida cities and towns also receive money from other sources. Depending on the place, these can include state revenue sharing, the local government half-cent sales tax, local option sales and fuel taxes, public service taxes on utilities, the communications services tax, franchise fees, charges for services such as utilities and permits, and state and federal grants. The mix differs from place to place. The City of Marathon's adopted budget shows its full set of revenue sources and how much each provides.
Property in the city also pays Monroe County government's Middle Keys health care MSTU. That money goes to the county, not the city, and is not included in these figures.
Property values and exemptions: The Monroe County Property Appraiser's 2026 final tax roll, as published by the Florida Department of Revenue. Tax rates: the 2025 millage rates the Florida Department of Revenue posts for Monroe County (2026 rates by tax district were not readily available). Parcel tax districts: the tax district codes on the same tax roll.
For each homestead, the estimated taxable value is its assessed value minus the new homestead exemption ($150,000 in 2027, $250,000 in 2028) and any other exemptions, but not less than zero. The gross levy is the city's total taxable value times 2.0631 mills. The budget basis is 95% of the gross levy, following section 200.065, Florida Statutes, and the Department of Revenue's 2026 TRIM Compliance Workbook. Early-payment discounts: section 197.162, Florida Statutes.