How Much Does It Really Cost to Own a $500,000 Home in Port St. Lucie?

BuyingRelocation

Oct 20

Quick answer: On an illustrative $500,000 purchase with 20 percent down, a 30-year loan at the Freddie Mac average of 7.40 percent, a statewide insurance average and an assumed maintenance allowance, the monthly carrying cost comes to about $4,214. That figure excludes HOA or CDD fees, utilities and any non-ad valorem assessments. The property tax line uses proposed 2026 rates and assumes the house is assessed at its price, which may not match the actual appraiser's value. Change the assumptions below to match your situation.

Buyers who ask "what will it cost?" usually mean the monthly payment, but the monthly payment is only one part of owning a home in Florida. Property taxes, insurance, maintenance and a set of one-time closing taxes all belong in the picture. This article builds one illustrative example for a $500,000 home in Port St. Lucie, lists every assumption, and shows which numbers would change the answer. It is not a quote for any property.

The assumptions

Every number in this example depends on one of the following assumptions. Change any of them and the result changes.

The purchase closes in 2026 with a $400,000 loan, which is 80 percent of the price. The loan is a 30-year fixed mortgage at 7.40 percent, the average for a 30-year fixed rate in Freddie Mac's weekly survey for the week ending October 15, 2026. I assume no points and no mortgage insurance.
The assessed value equals the purchase price. Florida law requires an assessment to account for the costs of sale, and I did not quantify that adjustment, so the actual assessed value may be lower.
The millage is an illustrative 18.8017 mills, made up of the city's proposed 2026 rate of 4.8750 mills, the school levies in the county's proposed 2026 table, and the countywide levies in that table. It excludes the Fire District, other municipal service units, beach and erosion levies and the Okeechobee basin. Coverage for each levy on a specific parcel must be confirmed.
The buyer qualifies for the homestead exemption, which is $25,000 on all levies plus a $26,411 additional non-school exemption for 2026. School levies receive only the $25,000 exemption.
Homeowners insurance is the Florida Office of Insurance Regulation's statewide average of $3,736 a year including wind, as of September 2026. That is not a Port St. Lucie quote, and the policy term is not stated.
Maintenance is 1 percent of the home's value each year, or $5,000. That is a planning assumption, not a measured cost for this house.
Florida's closing taxes follow the customary split: the seller customarily pays the deed stamp tax, and the buyer customarily pays the note stamp and intangible taxes. The contract controls, and the split is negotiable.

The monthly and annual numbers

Line item	Amount	Basis
Principal and interest, $400,000 at 7.40% for 30 years	$2,769.52 a month	Rate and loan terms above; calculated
School levies, 6.2450 mills on $475,000	$2,966.38 a year	Assumptions 3 and 4
Non-school levies, 12.5567 mills on $448,589	$5,632.80 a year	Assumptions 3 and 4
Property tax, illustrative total	$716.60 a month ($8,599.17 a year)	Sum of the two tax lines
Homeowners insurance	$311.33 a month ($3,736 a year)	Assumption 5
Maintenance at 1 percent of value	$416.67 a month ($5,000 a year)	Assumption 6
Monthly carrying cost	$4,214.12	Before HOA or CDD fees, utilities and non-ad valorem charges

The one-time closing taxes

Florida's deed documentary stamp tax is 70 cents per $100 of price, which is $3,500 on a $500,000 home. The note documentary stamp tax is 35 cents per $100 borrowed, which is $1,400 on a $400,000 loan. The intangible tax is 2 mills, or 0.20 percent of the loan, which is $800. Under the customary split, the buyer pays the note stamp and the intangible tax, $2,200 together, and the seller pays the deed stamp. The minimum cash to close on this example is therefore $100,000 for the down payment plus $2,200, or $102,200, before lender fees, title charges, prepaid items and any other costs. Those costs are not included here.

What moves the number

Each mill on the non-school tax base is worth about $448.59 a year on this example's assumed value. A 3-mill Fire District levy, if it applied to the parcel, would add about $1,345.77 a year. A different interest rate, a larger down payment or a different assessed value would each change the monthly figure, so ask your lender for a loan estimate and ask the property appraiser for the parcel's actual figures.

What the November amendment could change

The statewide property tax amendment on the November 3, 2026 ballot, known as Amendment 3 or HJR 1F, would raise the non-school homestead exemption starting January 1, 2027 if voters approve it, with a 60 percent threshold. It does not change school levies. It is not yet law, so this example does not include it. Our Amendment 3 post explains the details and the timing.

What the example leaves out

The example does not include HOA or CDD fees, non-ad valorem assessments, utilities, flood insurance where required, title and recording costs, lender fees, prepaid items, moving costs or repairs beyond the maintenance allowance. Any of those can be significant. A home with a community development district, for example, can add an assessment that is billed with the taxes. Our no-HOA guide explains how to find those charges.

How to use this

Replace the assumptions with the figures for the home you are considering: the actual loan estimate, the parcel's tax bill with the buyer's reassessment in mind, a quote for that address, and your own maintenance budget. Then compare the total monthly cost against the budget you set before you start looking. If the total does not fit, the price has to change, not the assumptions.

Questions buyers ask about the cost of owning

What is the property tax on a $500,000 home in Port St. Lucie?

It depends on the parcel's assessed value, exemptions and the levies that apply to the address. The illustrative figure in this article is about $8,600 a year, using proposed 2026 rates and the assumptions listed. Confirm the parcel's actual levies with the property appraiser.

What does insurance cost in Florida?

The state's statewide average, as reported by the Office of Insurance Regulation as of September 2026, is $3,736 a year including wind coverage. That is an average, not a quote, and your premium will depend on the home, the carrier and the coverage.

Who pays the documentary stamp taxes?

Florida custom usually has the seller pay the deed stamp tax and the buyer pay the note stamp and intangible tax. The contract controls, and the split is negotiable, so read the purchase agreement.

Will the November amendment cut my taxes?

Not yet. Amendment 3 is on the ballot for November 3, 2026. If approved, it changes the non-school levies starting in 2027, and it does not change school levies. Check the current status and details before you plan around it.

Do HOA or CDD fees apply to this home?

Check the specific parcel. Florida requires an HOA disclosure summary before signing for communities governed by an association covered by s. 720.401, and a CDD statement in certain contracts under s. 190.048. Ask for both.

Talk with William. Want this example rebuilt for a specific home? Send me the address and your target price. I will help you gather the tax, insurance, HOA or CDD and loan figures so you can see the real monthly number before you make an offer. Call or text (772) 800-2274 or send a message.

Illustrative example only, not a quote, loan estimate, tax bill, insurance quote or financial advice. Rates, millage, insurance averages and closing tax rules change, and the proposed 2026 rates were not final when this article was prepared. Confirm every figure with a licensed mortgage loan originator, the St. Lucie County Property Appraiser, a licensed insurance agent and a CPA. Figures as reviewed on October 20, 2026. William Merchant, REALTOR®, RE/MAX Gold. Each RE/MAX office is independently owned and operated. Equal Housing Opportunity.

Sources

Port St. Luciecost of ownershipproperty taxeshomeowners insurancemortgage

William Merchant