Why Your Miami Property Tax Bill Won’t Look Anything Like the Seller’s

There is a number on almost every listing that quietly misleads buyers, and it is not the price. It is the annual property tax figure.

That number is the current owner’s bill. Say they have owned the home for fifteen years as their primary residence. In that case, their bill may have almost nothing to do with what you will pay in your first full year. On a high-value Miami home, the gap is often tens of thousands of dollars a year.

Buyers who plug the seller’s number into their budget are not being careless. They are being reasonable, because the system is truly counterintuitive. So here is how your Miami property tax bill actually works.

The reset

Florida caps how fast a homesteaded property’s assessed value can rise. Under the Save Our Homes rule, yearly increases cannot exceed 3 percent or the change in the Consumer Price Index, whichever is lower. For 2026, that figure came in at 2.7 percent.

Over a long ownership, this adds up to something remarkable. Take a Coral Gables home bought for $500,000 in 2008 and homesteaded since. Today it might be worth about $1.8 million, while its assessed value sits around $850,000. In other words, the owner has built up close to a million dollars of protection. At Miami-Dade tax rates, that gap saves them roughly $18,000 to $20,000 a year.

None of it transfers to you. A sale resets the assessed value to full market value. The Property Appraiser revalues the home as of January 1 after the sale. Then your first full-year bill uses that reset figure, not the seller’s protected one.

This is the most common cause of carrying-cost shock among out-of-state buyers in Miami. Yet it is entirely predictable if you know to look for it.

Doing the arithmetic yourself

The formula is simple. Annual tax equals taxable value times the millage rate, divided by 1,000. One mill is one dollar per thousand dollars of taxable value.

Combined millage in Miami-Dade generally runs between about 18 and 21 mills, depending on the city. That is because the total stacks county, school board, city and special district taxes. Coral Gables, Bal Harbour, Miami Beach and unincorporated Miami-Dade all sit at different points in that range.

The spread matters. For example, three mills of difference on $2 million of taxable value is $6,000 a year. Over a decade, that adds up to $60,000. A prestigious zip code does not guarantee a lower rate, so check the specific city rather than assuming.

Two refinements

First, the Property Appraiser sets your new assessed value using mass-appraisal methods. As a result, it does not always match your purchase price exactly. Often it lands somewhat below. That is a helpful cushion, but do not build a budget around it.

Second, each city and county adopts next year’s millage rates in September. The new rates take effect October 1 and show up on the November bill. So if you are buying now, you are budgeting against rates that are about to change.

What homestead is actually worth

If the home will be your permanent primary residence, you can apply for the homestead exemption. It does two things.

A direct cut to taxable value

For the 2026 tax year, the maximum exemption is $51,411. It has two parts. The first $25,000 applies to all taxes, including school taxes. A second tier of $26,411 applies only to non-school taxes.

That second tier used to be a flat $25,000. However, voters approved Amendment 5 in November 2024. Now the second tier rises with inflation every year, and it can only go up.

Your own Save Our Homes cap

The second benefit is far more valuable over time. Homestead status starts your own Save Our Homes cap, beginning the year after approval. On a multi-million dollar home in a rising market, that cap is worth far more over ten years than the exemption itself.

You apply to the county Property Appraiser on Form DR-501. The standard deadline is March 1 of the year you are claiming. You must also own the home and live in it as your permanent residence on January 1 of that tax year. If you miss the deadline, you lose a full year of both benefits. That is an expensive paperwork mistake.

Portability, and who it does not help

If you sell one Florida homestead and buy another, you can carry your Save Our Homes savings to the new home. The transfer is capped at $500,000 of built-up assessment difference. You file it on Form DR-501T along with your new homestead application. After leaving the old homestead, you have three tax years to set up the new one.

This is a powerful benefit for Florida owners trading up. In fact, it is one reason the local move-up market works the way it does.

Still, it is worth saying plainly: portability moves a Florida benefit between Florida homes. A buyer arriving from New York, Chicago or California has nothing to carry over. You start fresh at market value.

The second-home position

If the Miami home will be a second home rather than your primary residence, the picture changes. Non-homestead property gets no homestead exemption, no 3 percent cap and no portability. Instead, it gets a separate cap of 10 percent a year on the non-school portion. That offers some protection against runaway assessments, but far less than homestead owners enjoy.

For buyers deciding whether to make Miami their primary residence, this gap is one of the bigger money factors. It also ties directly into the state income tax question rather than standing apart from it.

The vote in November, and the date attached to it

This part is truly time-sensitive, and most buyers have not heard about it yet.

On June 2, 2026, the Florida Legislature passed HJR 1-F in a special session. It will appear on the November 3, 2026 ballot as Amendment 3, and it needs 60 percent approval to pass.

What Amendment 3 would change

• A $25,000 exemption against school taxes would remain.
• A much larger non-school exemption would phase in: up to $150,000 in 2027 and up to $250,000 in 2028.
• CPI adjustments would begin in 2029.
• The assessment cap on non-homestead property would drop from 10 percent to 5 percent. That matters a lot for second-home and investment buyers.

Why your move-in date may matter

Here is the detail anyone planning a move to Florida should know. As written, owners who are permanent Florida residents by December 31, 2026 would qualify for the larger exemptions as they phase in. By contrast, those who become residents on or after January 1, 2027 would start at a lower new-resident level. They would step up only after keeping a Florida homestead for several years.

In other words, when you establish residency could carry real long-term value. The amendment has not passed yet, and nobody should reshape their life around a ballot measure that may fail. But if you already plan to move, talk through the calendar with your tax adviser now rather than in January.

Model your year one honestly

Before you write an offer, ask for three things:

• The home’s current assessed value and market value from the Property Appraiser’s records
• The combined millage for that specific city
• An estimate of your own year-one bill based on a reset assessment

The Miami-Dade Property Appraiser publishes an estimator built on exactly this approach. Any good agent should run it for you without being asked.

Then add the non-ad valorem assessments. These appear on the same bill, but the millage math does not capture them at all.

Chris King models year-one carrying costs on every property our buyers consider, including the tax reset. That way, the number in your budget is your number, not the seller’s. If you are considering a Miami purchase and want to see the real math on a specific address, we are happy to run it.

This article is general information, not tax or legal advice. Exemption amounts, caps and ballot proposals change. Confirm your position with a Florida CPA or attorney and the county Property Appraiser.