The single most common budgeting mistake we see in Southwest Florida new construction is a buyer looking up the property tax on their parcel, seeing a comfortable number, and planning around it. That number is usually the tax on a vacant lot. Here is how Florida actually assesses a new house, and why the second bill is the one that matters.
The 1 January rule
Florida assesses real property once a year, as of 1 January. Section 192.042 of the Florida Statutes is unambiguous about what happens to a house that is not finished by then: improvements or portions not substantially completed on January 1 shall have no value placed thereon. “Substantially completed” means the improvement can be used for the purpose it was built for.
So if your certificate of occupancy issues in March, the property appraiser values your parcel that year as land. Your first tax bill, arriving that November, is a land bill. The following 1 January the house exists for assessment purposes, and the bill you receive eleven months later is several times larger.
This is not a loophole and nobody is doing anything wrong. It simply means the prior year’s tax figure on a new-construction parcel tells you almost nothing about what you will pay in year three.
How to estimate the real number
Take the purchase price, not the land value. Apply the millage rate for that specific taxing district — county, school board, city if the property is inside one, fire district, water management district — and remember that a community development district assessment, if there is one, is a separate non-ad valorem line on the same bill. The other line that moves a Southwest Florida monthly payment is insurance, and it is not on the tax bill at all.
Your county property appraiser publishes a tax estimator for exactly this purpose. Use it before you sign, not after you close. The standard Florida contract prorates taxes at closing on the current year’s figure and provides for readjustment when the real bill arrives, which protects the proration — it does not protect your monthly budget.
Homestead: the two dates that decide everything
Florida’s homestead exemption is worth real money, and it is governed by two dates that catch new-construction buyers constantly.
1 January
You must hold title and have the property as your permanent residence as of 1 January to qualify for that tax year. Close in February and you do not qualify for that year at all — not a partial year, not a prorated exemption. Nothing.
1 March
Applications must be filed by 1 March of the year you qualify for, to be considered timely. So the buyer who closes in February 2027 applies by 1 March 2028, for the 2028 tax year.
What it is worth
The first $25,000 of assessed value is exempt from all levies. A second exemption applies to assessed value above $50,000 for every levy except school district levies; that second band is indexed to inflation and the Department of Revenue set it at $26,411 for 2026 (it was $25,722 for 2025).
Save Our Homes, and why year one is the expensive one
Once homestead is granted, Florida caps the annual increase in your assessed value at the lower of 3% or the change in the Consumer Price Index. That cap — Save Our Homes — applies from the year after homestead is granted. Your first assessed year on a new house is at just value with no cap benefit, which is another reason the early bills climb steeply and then settle.
If you already own a homesteaded Florida property, portability lets you carry the accumulated Save Our Homes difference to the new home, up to $500,000, provided you held homestead on the old property as of 1 January in one of the three immediately preceding years. It is not automatic. It requires its own application, filed alongside the homestead application, and buyers lose it every year by assuming the appraiser will work it out.
If the house will not be your permanent residence, a different cap applies: non-homestead property is limited to 10% a year excluding school levies, and it resets to market value when ownership changes.
The calendar
- 1 January — assessment date; ownership and residency tested
- 1 March — homestead and portability applications due
- August — TRIM notice (Notice of Proposed Property Taxes) arrives; this is your window to question the assessment
- Late October / early November — tax bills mailed
- November to February — early payment discounts of 4%, 3%, 2% and 1% respectively
- 31 March — payment due
Paying in November rather than March is a 4% discount for doing nothing but paying early. On a $9,000 bill that is $360.
One thing on the ballot this November
Florida Amendment 3 goes to voters on 3 November 2026 and requires 60% approval to pass. If it passes, the non-school homestead exemption would rise to up to $150,000 from 1 January 2027 and up to $250,000 from 1 January 2028, and the non-homestead assessment cap would drop from 10% to 5% from 1 January 2027. The first tax bills reflecting it would be the ones mailed in November 2027.
It has not passed. Do not budget on it, and be sceptical of anyone selling you a house on the strength of it. But if you are choosing between closing in December and closing in January, it is one more variable worth knowing exists.
The short version
Budget on the purchase price and the full millage, not on last year’s bill. Close before 31 December if you can and want homestead for the following year. File by 1 March. If you are already homesteaded in Florida, file for portability at the same time. And read the non-ad valorem section of the bill, because in a lot of Southwest Florida communities that is where the community development district assessment lives.
We are licensed Florida real estate professionals, not tax advisers or accountants. Confirm the figures for your parcel with the property appraiser for your county before you rely on them.