Martin County government
An estimate of how Amendment 3's larger homestead exemption could change Martin County government's ad valorem property tax revenue, based on 2026 property values and final 2026 tax rates.
These are estimates, not forecasts. They hold today's values and tax rates constant to show the effect of the new exemption by itself. Property values, the number of homesteads and tax rates will all change. Property taxes are also not the only source of revenue for Martin County government. Read the full list of limitations below.
Illustrative estimates only. These figures are meant to illustrate how Amendment 3 could affect Martin County government based on current data. They are not official. For official information about the county's budget, tax rates and revenue, contact Martin County government directly. For official property values and exemptions, contact the Martin County Property Appraiser.
Summary of estimates
This page covers the nine operating property taxes Martin County government levies in the final 2026 millage table, grouped by where they apply: the countywide levy (6.5614 mills, paid throughout Martin County, inside and outside cities); the fire rescue MSTU (2.6376 mills, paid in unincorporated Martin County, the Town of Ocean Breeze and the Village of Indiantown); the unincorporated stormwater MSTU (0.5722 mills, paid in unincorporated Martin County); the parks and recreation MSTU (0.1474 mills, paid in unincorporated Martin County); and 5 more levies for smaller areas, each shown below.
2026 county ad valorem revenue$328.7 millionAll county levies, 95% of a combined gross levy of $345.9 million
2028 estimate$269.5 millionWith homestead assessed values rising by up to 3% a year, capped at just value
Estimated change by 2028−$59.2 million−18.0% from 2026. If homestead values stay flat: −$66.4 million (−20.2%)
Homesteads countywide49,11350.0% of 98,240 parcels
Countywide levy (6.5614 mills)
Paid on taxable property throughout Martin County, inside and outside cities. Estimated change by 2028: −$40.0 million (−16.9%). Homestead assessed values rise by up to 3% a year (never above each home's just value); all other property stays at its 2026 taxable value.
| Year | Homestead taxable value | Other taxable value | Total taxable value | Gross levy | Budget basis (95%) | Change from 2026 (95%) | Percent change |
|---|
| 2026 | $17,700,058,944 | $20,203,157,896 | $37,903,216,840 | $248,698,167 | $236,263,259 | — | — |
| 2027 (estimate) | $14,043,347,729 | $20,203,157,896 | $34,246,505,625 | $224,705,022 | $213,469,771 | −$22,793,488 | −9.6% |
| 2028 (estimate) | $11,282,752,596 | $20,203,157,896 | $31,485,910,492 | $206,591,653 | $196,262,070 | −$40,001,188 | −16.9% |
If homestead assessed values stay at 2026 levels
| Year | Homestead taxable value | Other taxable value | Total taxable value | Gross levy | Budget basis (95%) | Change from 2026 (95%) | Percent change |
|---|
| 2026 | $17,700,058,944 | $20,203,157,896 | $37,903,216,840 | $248,698,167 | $236,263,259 | — | — |
| 2027 (estimate) | $13,574,899,532 | $20,203,157,896 | $33,778,057,428 | $221,631,346 | $210,549,779 | −$25,713,480 | −10.9% |
| 2028 (estimate) | $10,454,575,486 | $20,203,157,896 | $30,657,733,382 | $201,157,652 | $191,099,769 | −$45,163,489 | −19.1% |
Fire rescue MSTU (2.6376 mills)
A municipal services taxing unit for fire rescue, paid on 86,912 parcels in unincorporated Martin County, the Town of Ocean Breeze and the Village of Indiantown. Estimated change by 2028: −$14.9 million (−20.8%). Homestead assessed values rise by up to 3% a year (never above each home's just value); all other property stays at its 2026 taxable value.
| Year | Homestead taxable value | Other taxable value | Total taxable value | Gross levy | Budget basis (95%) | Change from 2026 (95%) | Percent change |
|---|
| 2026 | $14,048,703,710 | $14,525,978,368 | $28,574,682,078 | $75,368,581 | $71,600,152 | — | — |
| 2027 (estimate) | $10,694,667,764 | $14,525,978,368 | $25,220,646,132 | $66,521,976 | $63,195,877 | −$8,404,275 | −11.7% |
| 2028 (estimate) | $8,118,987,755 | $14,525,978,368 | $22,644,966,123 | $59,728,363 | $56,741,945 | −$14,858,208 | −20.8% |
If homestead assessed values stay at 2026 levels
| Year | Homestead taxable value | Other taxable value | Total taxable value | Gross levy | Budget basis (95%) | Change from 2026 (95%) | Percent change |
|---|
| 2026 | $14,048,703,710 | $14,525,978,368 | $28,574,682,078 | $75,368,581 | $71,600,152 | — | — |
| 2027 (estimate) | $10,324,270,913 | $14,525,978,368 | $24,850,249,281 | $65,545,018 | $62,267,767 | −$9,332,386 | −13.0% |
| 2028 (estimate) | $7,477,668,012 | $14,525,978,368 | $22,003,646,380 | $58,036,818 | $55,134,977 | −$16,465,176 | −23.0% |
Unincorporated stormwater MSTU (0.5722 mills)
A municipal services taxing unit for stormwater management, paid on 83,973 parcels in unincorporated Martin County. Estimated change by 2028: −$3.2 million (−20.9%). Homestead assessed values rise by up to 3% a year (never above each home's just value); all other property stays at its 2026 taxable value.
| Year | Homestead taxable value | Other taxable value | Total taxable value | Gross levy | Budget basis (95%) | Change from 2026 (95%) | Percent change |
|---|
| 2026 | $13,957,248,159 | $14,045,437,803 | $28,002,685,962 | $16,023,137 | $15,221,980 | — | — |
| 2027 (estimate) | $10,645,563,948 | $14,045,437,803 | $24,691,001,751 | $14,128,191 | $13,421,782 | −$1,800,198 | −11.8% |
| 2028 (estimate) | $8,093,824,890 | $14,045,437,803 | $22,139,262,693 | $12,668,086 | $12,034,682 | −$3,187,298 | −20.9% |
If homestead assessed values stay at 2026 levels
| Year | Homestead taxable value | Other taxable value | Total taxable value | Gross levy | Budget basis (95%) | Change from 2026 (95%) | Percent change |
|---|
| 2026 | $13,957,248,159 | $14,045,437,803 | $28,002,685,962 | $16,023,137 | $15,221,980 | — | — |
| 2027 (estimate) | $10,276,742,454 | $14,045,437,803 | $24,322,180,257 | $13,917,152 | $13,221,294 | −$2,000,686 | −13.1% |
| 2028 (estimate) | $7,454,408,321 | $14,045,437,803 | $21,499,846,124 | $12,302,212 | $11,687,101 | −$3,534,879 | −23.2% |
Parks and recreation MSTU (0.1474 mills)
A municipal services taxing unit for parks and recreation, paid on 83,973 parcels in unincorporated Martin County. Estimated change by 2028: −$821,100 (−20.9%). Homestead assessed values rise by up to 3% a year (never above each home's just value); all other property stays at its 2026 taxable value.
| Year | Homestead taxable value | Other taxable value | Total taxable value | Gross levy | Budget basis (95%) | Change from 2026 (95%) | Percent change |
|---|
| 2026 | $13,957,248,159 | $14,045,437,803 | $28,002,685,962 | $4,127,596 | $3,921,216 | — | — |
| 2027 (estimate) | $10,645,563,948 | $14,045,437,803 | $24,691,001,751 | $3,639,454 | $3,457,481 | −$463,735 | −11.8% |
| 2028 (estimate) | $8,093,824,890 | $14,045,437,803 | $22,139,262,693 | $3,263,327 | $3,100,161 | −$821,055 | −20.9% |
If homestead assessed values stay at 2026 levels
| Year | Homestead taxable value | Other taxable value | Total taxable value | Gross levy | Budget basis (95%) | Change from 2026 (95%) | Percent change |
|---|
| 2026 | $13,957,248,159 | $14,045,437,803 | $28,002,685,962 | $4,127,596 | $3,921,216 | — | — |
| 2027 (estimate) | $10,276,742,454 | $14,045,437,803 | $24,322,180,257 | $3,585,089 | $3,405,835 | −$515,381 | −13.1% |
| 2028 (estimate) | $7,454,408,321 | $14,045,437,803 | $21,499,846,124 | $3,169,077 | $3,010,623 | −$910,593 | −23.2% |
District 3 MSTU (0.0378 mills)
Paid on 26,595 parcels in parts of unincorporated Martin County. Estimated change by 2028: −$37,700 (−12.2%). Homestead assessed values rise by up to 3% a year (never above each home's just value); all other property stays at its 2026 taxable value.
| Year | Homestead taxable value | Other taxable value | Total taxable value | Gross levy | Budget basis (95%) | Change from 2026 (95%) | Percent change |
|---|
| 2026 | $3,713,346,256 | $4,868,637,399 | $8,581,983,655 | $324,399 | $308,179 | — | — |
| 2027 (estimate) | $3,109,052,680 | $4,868,637,399 | $7,977,690,079 | $301,557 | $286,479 | −$21,700 | −7.0% |
| 2028 (estimate) | $2,663,426,617 | $4,868,637,399 | $7,532,064,016 | $284,712 | $270,476 | −$37,703 | −12.2% |
If homestead assessed values stay at 2026 levels
| Year | Homestead taxable value | Other taxable value | Total taxable value | Gross levy | Budget basis (95%) | Change from 2026 (95%) | Percent change |
|---|
| 2026 | $3,713,346,256 | $4,868,637,399 | $8,581,983,655 | $324,399 | $308,179 | — | — |
| 2027 (estimate) | $3,010,094,979 | $4,868,637,399 | $7,878,732,378 | $297,816 | $282,925 | −$25,254 | −8.2% |
| 2028 (estimate) | $2,481,304,234 | $4,868,637,399 | $7,349,941,633 | $277,828 | $263,936 | −$44,243 | −14.4% |
District 4 MSTU (0.0450 mills)
Paid on 18,181 parcels in parts of unincorporated Martin County. Estimated change by 2028: −$68,100 (−33.5%). Homestead assessed values rise by up to 3% a year (never above each home's just value); all other property stays at its 2026 taxable value.
| Year | Homestead taxable value | Other taxable value | Total taxable value | Gross levy | Budget basis (95%) | Change from 2026 (95%) | Percent change |
|---|
| 2026 | $2,645,693,412 | $2,113,059,451 | $4,758,752,863 | $214,144 | $203,437 | — | — |
| 2027 (estimate) | $1,743,455,087 | $2,113,059,451 | $3,856,514,538 | $173,543 | $164,866 | −$38,571 | −19.0% |
| 2028 (estimate) | $1,053,283,246 | $2,113,059,451 | $3,166,342,697 | $142,485 | $135,361 | −$68,076 | −33.5% |
If homestead assessed values stay at 2026 levels
| Year | Homestead taxable value | Other taxable value | Total taxable value | Gross levy | Budget basis (95%) | Change from 2026 (95%) | Percent change |
|---|
| 2026 | $2,645,693,412 | $2,113,059,451 | $4,758,752,863 | $214,144 | $203,437 | — | — |
| 2027 (estimate) | $1,675,213,732 | $2,113,059,451 | $3,788,273,183 | $170,472 | $161,949 | −$41,488 | −20.4% |
| 2028 (estimate) | $948,485,932 | $2,113,059,451 | $3,061,545,383 | $137,770 | $130,881 | −$72,556 | −35.7% |
District 5 MSTU (0.0635 mills)
Paid on 15,081 parcels in parts of unincorporated Martin County. Estimated change by 2028: −$95,900 (−27.8%). Homestead assessed values rise by up to 3% a year (never above each home's just value); all other property stays at its 2026 taxable value.
| Year | Homestead taxable value | Other taxable value | Total taxable value | Gross levy | Budget basis (95%) | Change from 2026 (95%) | Percent change |
|---|
| 2026 | $3,660,024,984 | $2,051,695,778 | $5,711,720,762 | $362,694 | $344,560 | — | — |
| 2027 (estimate) | $2,801,357,226 | $2,051,695,778 | $4,853,053,004 | $308,169 | $292,760 | −$51,799 | −15.0% |
| 2028 (estimate) | $2,069,923,134 | $2,051,695,778 | $4,121,618,912 | $261,723 | $248,637 | −$95,923 | −27.8% |
If homestead assessed values stay at 2026 levels
| Year | Homestead taxable value | Other taxable value | Total taxable value | Gross levy | Budget basis (95%) | Change from 2026 (95%) | Percent change |
|---|
| 2026 | $3,660,024,984 | $2,051,695,778 | $5,711,720,762 | $362,694 | $344,560 | — | — |
| 2027 (estimate) | $2,702,339,268 | $2,051,695,778 | $4,754,035,046 | $301,881 | $286,787 | −$57,772 | −16.8% |
| 2028 (estimate) | $1,892,212,538 | $2,051,695,778 | $3,943,908,316 | $250,438 | $237,916 | −$106,643 | −31.0% |
District 1 MSTU (0.0637 mills)
Paid on 14,196 parcels in parts of unincorporated Martin County. Estimated change by 2028: −$58,900 (−16.4%). Homestead assessed values rise by up to 3% a year (never above each home's just value); all other property stays at its 2026 taxable value.
| Year | Homestead taxable value | Other taxable value | Total taxable value | Gross levy | Budget basis (95%) | Change from 2026 (95%) | Percent change |
|---|
| 2026 | $2,576,134,233 | $3,356,196,896 | $5,932,331,129 | $377,889 | $358,995 | — | — |
| 2027 (estimate) | $2,013,997,348 | $3,356,196,896 | $5,370,194,244 | $342,081 | $324,977 | −$34,018 | −9.5% |
| 2028 (estimate) | $1,602,066,405 | $3,356,196,896 | $4,958,263,301 | $315,841 | $300,049 | −$58,946 | −16.4% |
If homestead assessed values stay at 2026 levels
| Year | Homestead taxable value | Other taxable value | Total taxable value | Gross levy | Budget basis (95%) | Change from 2026 (95%) | Percent change |
|---|
| 2026 | $2,576,134,233 | $3,356,196,896 | $5,932,331,129 | $377,889 | $358,995 | — | — |
| 2027 (estimate) | $1,947,388,064 | $3,356,196,896 | $5,303,584,960 | $337,838 | $320,946 | −$38,049 | −10.6% |
| 2028 (estimate) | $1,486,248,895 | $3,356,196,896 | $4,842,445,791 | $308,464 | $293,041 | −$65,954 | −18.4% |
Hutchinson Island Special District A MSTU (0.1799 mills)
Paid on 3,297 parcels in parts of unincorporated Martin County. Estimated change by 2028: −$28,000 (−6.5%). Homestead assessed values rise by up to 3% a year (never above each home's just value); all other property stays at its 2026 taxable value.
| Year | Homestead taxable value | Other taxable value | Total taxable value | Gross levy | Budget basis (95%) | Change from 2026 (95%) | Percent change |
|---|
| 2026 | $959,512,173 | $1,546,942,369 | $2,506,454,542 | $450,911 | $428,366 | — | — |
| 2027 (estimate) | $872,451,892 | $1,546,942,369 | $2,419,394,261 | $435,249 | $413,487 | −$14,879 | −3.5% |
| 2028 (estimate) | $795,756,135 | $1,546,942,369 | $2,342,698,504 | $421,451 | $400,379 | −$27,987 | −6.5% |
If homestead assessed values stay at 2026 levels
| Year | Homestead taxable value | Other taxable value | Total taxable value | Gross levy | Budget basis (95%) | Change from 2026 (95%) | Percent change |
|---|
| 2026 | $959,512,173 | $1,546,942,369 | $2,506,454,542 | $450,911 | $428,366 | — | — |
| 2027 (estimate) | $848,080,230 | $1,546,942,369 | $2,395,022,599 | $430,865 | $409,321 | −$19,044 | −4.4% |
| 2028 (estimate) | $749,757,398 | $1,546,942,369 | $2,296,699,767 | $413,176 | $392,517 | −$35,848 | −8.4% |
What drives the estimate
As with the cities and towns, the size of the change depends mostly on how much of the taxable value comes from homesteads. Property without a homestead exemption, such as rentals, businesses, second homes and vacant land, keeps its taxable value under the amendment.
Countywide, homesteads make up 46.7% of the taxable value for the countywide levies in 2026. Within the fire rescue MSTU area, they make up 49.2%, so the estimated percentage change for that levy is larger. Among the five cities and towns that levy a property tax, the homestead share ranges from 12.0% to 66.8%.
The table below shows where the change in the countywide taxable value comes from. Unincorporated Martin County has 73.9% of the county's taxable value and accounts for an estimated 91.4% of the change. The Town of Jupiter Island has 11.6% of the county's taxable value and accounts for an estimated −0.8% of the change.
| Area | County taxable value, 2026 | Share of county taxable value | Homestead share of area's taxable value | Change in area's taxable value by 2028 | Share of countywide change |
|---|
| Unincorporated Martin County | $28,002,685,962 | 73.9% | 49.8% | −20.9% | 91.4% |
| Town of Jupiter Island | $4,411,108,741 | 11.6% | 47.8% | +1.2% | −0.8% |
| City of Stuart | $3,750,125,290 | 9.9% | 20.4% | −11.6% | 6.8% |
| Town of Sewall's Point | $1,167,300,731 | 3.1% | 66.8% | −9.0% | 1.6% |
| Village of Indiantown | $480,087,564 | 1.3% | 12.0% | −10.0% | 0.8% |
| Town of Ocean Breeze | $91,908,552 | 0.2% | 36.7% | −19.7% | 0.3% |
Estimates use homestead assessed values rising by up to 3% a year, capped at just value. Areas are based on each parcel's tax district.
Property taxes are one of several revenue sources
Florida counties also receive money from other sources. Depending on the county, these can include state revenue sharing, the local government half-cent sales tax, local option sales and fuel taxes, communications services taxes, non-ad valorem assessments, franchise fees, charges for services, and state and federal grants. The mix differs from county to county. Martin County's adopted budget shows its full set of revenue sources and how much each provides.
The Children's Services Council of Martin County, the Florida Inland Navigation District, the water management district and the School Board levy their own property taxes. They are separate taxing authorities and are not included on this page.
Limitations of these estimates
- Values will change. Market values, new construction and demolitions will all change the county's taxable value. Here, property without a homestead exemption stays at its 2026 value, and homestead assessed values either stay flat or rise by up to 3% a year, but not above each home's 2026 just value. Homes already assessed at their just value don't rise at all, and just values will themselves change with the market. The Save Our Homes cap for 2026 was 2.7%.
- The number of homesteads will change. When a homestead sells, its assessed value resets to market value for the new owner. New owners may or may not apply for a homestead exemption. Owners who were not Florida residents on Dec. 31, 2026, receive a $50,000 non-school exemption instead of the larger amounts. None of these changes are modeled.
- Tax rates may change. The county commission sets the county's millage rates each year. These estimates hold the final 2026 rates constant to show the effect of the exemption alone.
- Annexations move property from unincorporated areas into cities, which changes the tax base of county levies that apply only in some areas. They are not modeled.
- Other parts of Amendment 3 are not modeled, including the new 5% annual cap on non-school assessment increases for property without a homestead exemption.
- Discounts and unpaid taxes. Property owners who pay early get a discount under section 197.162, Florida Statutes: 4% in November, 3% in December, 2% in January and 1% in February, with no discount in March. Some taxes are paid late or not at all, and value adjustment board decisions can lower a property's value after the roll is certified. Section 200.065, Florida Statutes, requires taxing authorities to use at least 95% of their taxable value when setting tax rates, and the Florida Department of Revenue's 2026 TRIM Compliance Workbook says each millage rate must include at least 95% of ad valorem proceeds in the budget. This page shows both the gross levy and 95% of it, called the budget basis. Actual collections vary from year to year and can be above or below 95%.
- Real property only. These figures cover land and buildings on the tax roll. Taxes on tangible personal property, such as business equipment, and on centrally assessed property, such as railroads, are not included. That property has no homestead exemption, so including it would add revenue that Amendment 3 does not change.
- Collection and assessment costs are not subtracted. Commissions paid to the tax collector and the county's share of the property appraiser's budget are not included.
- Operating millage only. Any voter-approved debt service millage is not included.
- Parcel locations come from the millage codes on the same tax roll.
- This page does not predict budgets, services or how Martin County may respond. For official figures, see Martin County's budget documents and the Martin County Property Appraiser.
Sources and method
Property values and exemptions: The Martin County Property Appraiser's 2026 final tax roll, as published by the Florida Department of Revenue. Tax rates: the Property Appraiser's 2026 final millage codes and tax rates. Parcel tax districts: the millage 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 total taxable value times the millage rate, for the parcels where each levy applies. The budget basis is 95% of the gross levy.
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