Florida TaxWatch's compilation of state estimates puts Monroe County's total local revenue loss from Amendment 3 at $13.7M in FY 2027-28 and $144.7M over five years, across 7 local governments in the estimate. The first-year hit equals 10.4% of the county government's FY 2025-26 property tax levies (statewide rank 66 of 67). The 2025 average total millage rate is 8.2361 mills (rank 67), of which 4.8892 is non-school, the part Amendment 3 affects.
The county budget director said a millage increase would be needed to keep revenue level for the Lower Keys fire/EMS district, with projected shortfalls of $430K and then $607K.
Sources: WLRN, Aug 19 2026
No adopted changes tracked yet. The items above are under discussion only.
| Fiscal year | Estimated loss |
|---|---|
| FY 2027-28 | $13.7M |
| FY 2028-29 | $26.5M |
| FY 2029-30 | $31.0M |
| FY 2030-31 | $35.0M |
| FY 2031-32 | $38.5M |
| 5-year total | $144.7M |
Source: Florida TaxWatch Property Tax Resource Center (Revenue Estimating Conference estimates and DOR 2025 millage, Oct 2026).
| Government | Type | FY 2027-28 | 5-year total |
|---|---|---|---|
| Monroe County | County government | $9,014,008 | $95,673,754 |
| All ISDs in Monroe | Independent Special District | $2,058,998 | $21,815,361 |
| Islamorada, Village of Islands | Municipality | $856,359 | $9,367,742 |
| Key Colony Beach | Municipality | $126,221 | $1,165,077 |
| Key West | Municipality | $1,056,831 | $11,092,812 |
| Layton | Municipality | $22,050 | $212,994 |
| Marathon | Municipality | $519,623 | $5,413,800 |
Statewide rank in parentheses (1 = highest). Source: Florida TaxWatch Property Tax Resource Center (Revenue Estimating Conference estimates and DOR 2025 millage, Oct 2026).
Illustrative: on a $300,000 homestead at the county's average non-school rate of 4.8892 mills, non-school tax is about $1,215 under 2026 rules, $733 in 2027 and $244 in 2028, before any new fees or rate changes. A new resident arriving in 2027 would pay about $1,222. Run your own numbers.
Nearby: Miami-Dade County · Nassau County · all counties
About $13.7M in FY 2027-28 and $144.7M over five years for all local governments in the county, per Revenue Estimating Conference figures compiled by Florida TaxWatch.
The 2025 average total millage rate is 8.2361 mills, including 4.8892 mills of non-school levies. Your exact rate depends on your city and special districts. Source: Florida TaxWatch from Florida DOR data.
Under discussion, not adopted: Lower Keys fire/EMS: millage increase said to be needed.
Florida taxing authorities propose rates in TRIM notices mailed in August and adopt them at September budget hearings. The first budget under the $150,000 exemption is FY 2027-28.
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