Why Miami-Dade and Broward Property Taxes Often Rise After You Buy a Home

by William Gartin

Many South Florida buyers look at a seller's current tax bill and assume their own taxes will be close. In many cases, that is one of the easiest ways to underestimate the true cost of owning a home.

In Miami-Dade and Broward, a home's tax bill can change sharply after a sale because the seller may have had a long-term assessed value cap, homestead savings, or both. Once ownership changes, that old tax picture usually does not stay the same for the new owner.

If you are buying a primary residence in 2026, this is one of the most important budget conversations to have before you remove contingencies or lock in a monthly payment.

Why property taxes often rise after closing

Florida property taxes are based on taxable value, exemptions, and local millage rates. The issue for many buyers is that the seller's taxable value may be much lower than today's market value.

The Miami-Dade Property Appraiser's tax estimator specifically warns that if you buy a home after January 1, you may benefit from the seller's homestead exemption and assessment limitation for the current tax year, but those benefits can be removed the following year. Broward County gives a similar warning: a change in ownership can reset the assessed value to full market value, which can lead to higher taxes.

That means a buyer can close on a home, feel comfortable with the current tax line item, and then see a very different number once the property is reassessed for the next tax year.

Why this matters to buyers in Miami-Dade and Broward

In South Florida, even a moderate tax increase can affect affordability more than people expect. Higher property taxes can raise your monthly escrow payment, change your debt-to-income ratio, and reduce the cash cushion you planned to keep after closing.

This matters even more for buyers stretching to purchase in competitive neighborhoods, buyers moving from out of state, and anyone comparing a condo, townhouse, and single-family home side by side.

It is also important for homeowners planning a move within Florida, because portability may help reduce the jump if you are transferring your Save Our Homes benefit correctly and on time.

A simple way to estimate your likely tax picture

Start with the current property tax record, but treat it as history. The seller's bill tells you what that owner paid, not necessarily what you will pay.
Estimate taxes closer to your purchase price. Miami-Dade and Broward both provide online tools that help buyers model a more realistic next-year tax number.
Ask your lender to rerun the monthly payment with the higher estimate. This is one of the easiest ways to avoid payment shock.
If the home will be your primary residence, file for homestead on time. Miami-Dade says the application is due by March 1. Broward notes its 2026 timely filing deadline was March 2, 2026, with a late-filing deadline of September 18, 2026.
If you are moving from another Florida homestead, ask about portability right away. Miami-Dade says portability can transfer up to $500,000 of homestead assessment difference and must be tied to your new homestead filing.
Read your TRIM notice when it arrives. Florida's Truth in Millage notice is an estimate, not the final bill, but it gives you time to review value, exemptions, and taxing authorities before the November tax bill arrives.

How homestead and portability fit into the conversation

Florida's homestead exemption can reduce the taxable value of a primary residence, and it also opens the door to the Save Our Homes assessment limitation. The Florida Department of Revenue's current guidance says the basic homestead benefit can be worth up to $50,000 in exemption value, depending on the assessed value and which taxes are being applied.

Once a home has homestead, Save Our Homes can limit annual assessed-value increases. The Florida Department of Revenue's January 2026 chart shows the 2026 Save Our Homes cap at 2.7%.

If you already owned and homesteaded another Florida home, portability may let you transfer all or part of that assessment difference to the next primary residence. Miami-Dade says the benefit can be transferred up to $500,000, and the new homestead generally must be established within three assessment years after abandoning the prior one.

These rules can save real money, but they do not automatically erase every increase. Millage rates, non-ad valorem assessments, property type, and purchase price still matter. Rules and programs can change, and a licensed professional should review your specific situation.

Common mistakes to avoid

Using the seller's tax bill as your budget number. That is one of the most common buyer mistakes in Florida.
Ignoring the next-year escrow impact. Your lender may collect more once taxes reset.
Missing the homestead or portability filing window. Waiting can cost you money and make planning harder.
Assuming portability transfers automatically. It must be applied for and reviewed.
Forgetting non-ad valorem charges. Some tax bills include assessments that are separate from ad valorem taxes.

The Miami-Dade and Broward connection

This issue comes up constantly in Miami-Dade and Broward because so many buyers are purchasing homes from owners who bought years ago and benefited from long-term assessment limits. The gap between an older owner's tax bill and a new buyer's likely tax bill can be significant.

That is why local buyers should use county estimator tools early, not the week before closing. It is also why comparing two homes based only on list price can be misleading. One home may look more affordable until you model the real tax and insurance picture.

What William Gartin recommends

Before you make an offer, run a realistic property-tax estimate, update the monthly payment with your lender, and make sure you understand whether the home will be owner-occupied, second-home, or investment-property financing. Then, if the home will be your primary residence, prepare your homestead and portability paperwork early instead of waiting until the deadline is close.

William Gartin works with buyers and sellers across Miami-Dade, Broward, and South Florida and can help you think through the real monthly cost of ownership before you commit. If financing guidance would help, William can also connect you with phenomenal lenders, including Joel Gonzalez with MOR Lending, so you can compare numbers clearly and move forward with better information.

William Gartin Real Estate
eXp Realty
305-842-6097
williamgartinrealestate.com
Facebook: https://www.facebook.com/williamgartinre
Buyer questionnaire: https://hul1lsz36ih.typeform.com/to/xmGciMYj

If you want help understanding what a South Florida home may really cost month to month before you buy, reach out and William will help you build a clearer plan.

Sources reviewed on May 20, 2026: Miami-Dade Property Appraiser, Broward County Property Appraiser, and the Florida Department of Revenue. This post is for general education only and is not legal, tax, or mortgage advice.