Martin County Property Tax on a New Home: Why the Second Bill Jumps
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Property tax on a new home in Martin County, Florida is based on the home's value on January 1, not on the day you close. If the house was not ""substantially completed"" on January 1, Florida law says the unfinished building gets no value that year. So your first tax bill may cover little more than the lot, and the next one, on the finished home, can be much bigger. Bills go out on or about November 1, with a 4% discount for paying early.
Knowing this ahead of time can save you from a surprise jump in your monthly payment.
How is property tax figured on a new home in Martin County?
Your bill is built from two pieces: your home's taxable value and the total millage rate where it sits.
Taxable value is the assessed value minus any exemptions, like homestead.
Millage is the tax rate. One mill is $1 of tax for every $1,000 of taxable value.
Several taxing authorities add their own rate: the county, the school board, your city if you live in one, and special districts like the water management district. The Martin County Property Appraiser lists each area's total.
Here are some 2025 FINAL totals from the Property Appraiser's ""2025 Final Millage Codes"" page (checked Oct. 14, 2026):
Area (2025 final) | Total millage |
|---|---|
City of Stuart | 17.3883 |
Indiantown | 16.8199 |
Unincorporated, District One | 15.7811 |
Unincorporated, District Three | 15.7549 |
Unincorporated, District Five | 15.7816 |
Homes outside a city or town fall in one of the county commission districts. Your exact total depends on your address. The Property Appraiser's site also posts 2026 rates, but its tax roll page still lists only the preliminary 2026 certification, so we use the 2025 final numbers here. Your November 2026 bill will show the rates that apply to you.
Why is the first tax bill on a new home so low?
Florida Statute 192.042 says real property is valued ""on January 1 of each year."" It adds: ""Improvements or portions not substantially completed on January 1 shall have no value placed thereon.""
""Substantially completed"" means the home ""can be used for the purpose for which it was constructed.""
The Martin County Property Appraiser's FAQ says it plainly: ""On January 1st of the year your improvements are completed, the value of those improvements will be added at full market value.""
So picture a home that was still being framed on January 1, 2026 and closed in September 2026. The 2026 bill would be based mostly on the lot. The 2027 bill would be based on the finished house. That is the jump many new owners do not see coming.
How much can the bill jump? An example
This table uses EXAMPLE values and the 2025 final City of Stuart total of 17.3883 mills. It ignores exemptions and non-ad valorem fees to keep the math simple.
EXAMPLE year | Value on January 1 | Rate (2025 Stuart final) | Tax before exemptions |
|---|---|---|---|
Year 1: lot only, home not finished | $90,000 | 17.3883 mills | $1,564.95 |
Year 2: finished home | $450,000 | 17.3883 mills | $7,824.74 |
In this example the bill rises by $6,259.79 a year, or about $522 a month. If your lender set your escrow using the lot-only bill, your monthly payment can rise after the yearly escrow review. Our guide to escrow explains how that works.
The Property Appraiser's tax estimator also warns: ""When buying real estate property, you should not assume that property taxes will remain the same."" It says the value ""may reset to full market value"" after a sale.
How much does the homestead exemption save in Martin County?
If the home is your permanent residence on January 1, you may qualify for homestead. The Martin County Property Appraiser says: ""Homestead exemption is $25,000 deducted from your assessed value and is exempt from all taxation. An additional $25,000 exemption, not applicable to school taxes, will be applied if your property's assessed value is greater than $50,000.""
That second amount now rises with inflation. The Florida Department of Revenue sets it at $26,411 for 2026. So for 2026, homestead can take up to $51,411 off your assessed value for non-school taxes.
Timing matters. You must own and live in the home as your permanent residence on January 1. The Property Appraiser says applications are due ""by March 1st."" Its FAQ adds: ""If you purchased the home after January 1st in the current year, then you won't qualify for the homestead exemption until the next year.""
So a buyer who closes in fall 2026 would file by March 1, 2027 for the 2027 tax year. Our guide to the Florida homestead exemption on a new home walks through the steps.
How much can my taxes go up each year after that?
Once homestead is in place, Florida's ""Save Our Homes"" cap limits how much your assessed value can rise. Florida Statute 193.155 says the yearly increase cannot be more than the lower of 3% or the change in the Consumer Price Index. The Florida Department of Revenue lists the 2026 cap at 2.7%.
The Property Appraiser's FAQ notes that new construction ""is valued at market the first year. Then the following year, it will be capped also.""
If the home is not your homestead, a different cap applies. Florida Statute 193.1554 limits yearly increases to 10% of the prior year's assessed value. The Property Appraiser says: ""This cap does not apply to the School Board portion of property taxes.""
Moving from another Florida homestead? The Property Appraiser says portability allows ""up to a $500,000 transferred benefit,"" and that you must apply for homestead and the transfer ""by March 1 of the tax year.""
When are Martin County property taxes due?
The Martin County Tax Collector says: ""Tax statements are mailed on or about November 1st of each year."" Florida Statute 197.162 sets the early-payment discounts:
4% in November (or within 30 days of the bill being sent)
3% in December
2% in January
1% in February
0% in March
The Tax Collector says taxes become delinquent April 1, ""at which time 3% interest plus advertising costs are added.""
Your bill may also include non-ad valorem assessments. The Tax Collector describes these as ""levies for special benefits to a property."" Call 561-704-0091 for today's numbers on any home you are considering.
Is there a property tax amendment on the November 2026 ballot?
Yes. The Florida Division of Elections lists Amendment 3, titled ""Increased Homestead Exemption; Lower Cap on Increases in Non-Homestead Property Assessments,"" on the November 3, 2026 ballot. Its official summary says it ""increases the homestead exemption, for all non-school taxes, to $150,000 in 2027 and $250,000 in 2028"" and ""reduces the annual cap on assessment increases for non-homestead properties from 10% to 5%."" It says it ""takes effect January 1, 2027."" We do not take a side. Our Amendment 3 explainer covers the details, and we will update this guide after the vote.
What this means for new-construction buyers in Martin County, FL
If you are buying a new home in Martin County, ask two questions before you close. First, was the home substantially complete on January 1? If not, your first bill may be lot-only, so budget for the finished-home bill the year after. Second, how did your lender set escrow? Plan for a possible increase after the first escrow review.
Then file for homestead by March 1 of the first year you own and live in the home on January 1. New-home communities on National House Search in Martin County include Sailfish Cay in Stuart and Preserves at Park Trace. For daily life near Sailfish Cay, see Martin County schools and daily life.
Common Questions
Why is my first property tax bill on a new home in Martin County so low?
Florida values property on January 1. Under Florida Statute 192.042, a home that was not substantially completed on January 1 gets no value that year, so the first bill may cover mostly the lot. The next bill uses the finished home's value.
What is the property tax rate in Martin County, FL?
It depends on where the home is. The Property Appraiser's 2025 final totals were 17.3883 mills in the City of Stuart, 16.8199 in Indiantown, and about 15.75 to 15.96 mills in the unincorporated districts. One mill is \$1 of tax per \$1,000 of taxable value.
How much is the homestead exemption in Martin County?
The first \$25,000 comes off for all taxes. A second amount comes off non-school taxes when assessed value is over \$50,000, and the Florida Department of Revenue sets it at \$26,411 for 2026. That is up to \$51,411 for non-school taxes.
When is the homestead deadline in Martin County?
March 1. You must own the home and make it your permanent residence on January 1 of that tax year. If you bought after January 1, you file for the next year.
When are Martin County property taxes due?
Bills are mailed on or about November 1. You get a 4% discount in November, 3% in December, 2% in January and 1% in February. Taxes become delinquent April 1.
How much can my property taxes go up each year?
With homestead, Save Our Homes limits the yearly rise in assessed value to 3% or the change in the Consumer Price Index, whichever is lower. The 2026 cap is 2.7%. Non-homestead homes have a 10% cap that does not apply to school taxes.
Ready to take the next step?
Call 561-704-0091 to talk with a National House Search specialist, or Schedule a visit.
Related reading: Sailfish Cay in Stuart · Preserves at Park Trace · Florida homestead exemption on a new home
This is general information, not financial, tax or legal advice. Figures checked October 14, 2026.