New Osceola Home: The Assessments Due at Your CO

By Nelson Cruz, P.A. | November 3, 2026

On the day your certificate of occupancy is issued, Osceola County assesses and collects a prorated fire rescue and solid waste charge on the new dwelling unit. The amount is set by the calendar month of the CO, not by the home’s size or price, and for fiscal year 2027 it ranges from $187.17 to $873.44 per dwelling unit. A June CO and a July CO are four weeks apart and $686.27 apart. After that one payment, the same two assessments arrive every year on the November property tax notice.

Where this charge comes from and who it reaches

Osceola County imposes annual special assessments for fire rescue services and solid waste collection services within unincorporated Osceola County, and residential dwelling unit owners are assessed annually for both. If your new home will sit inside a city such as Kissimmee or St. Cloud rather than in the unincorporated county, this is the wrong schedule to budget from, and the question goes to that city instead.

For a brand-new building the county does not wait for the tax roll. In its words, upon completion of a new building, on the date of issuance of the certificate of occupancy, the county assesses and collects a monthly proration of those special assessments. Only after that initial prorated collection do the annual assessments move onto the tax bill, collected under the Uniform Assessment Collection Act.

The fiscal year 2027 proration, month by month

The county publishes the schedule as a flat table keyed to the month the CO is issued. These figures are per dwelling unit and are effective October 1, 2026 through September 30, 2027.

A single monthly unit sits underneath the schedule. Each step down the October-to-June run removes $27.64 of fire rescue and $34.76 of solid waste, a combined $62.39, and every row’s two components add to the published total. Divide any row by that unit and a whole number of months falls out: eleven for an October CO, dropping one month at a time to three in June, then fourteen, thirteen and twelve for July, August and September. The September figure of $748.66 is exactly twelve months, which makes it the full annual assessment at fiscal 2027 rates.

Why a July certificate of occupancy costs the most

The county footnotes the jump directly: certificates of occupancy issued in July pay a prorated assessment for fourteen months because new properties cannot be placed on the tax roll. That constraint is statutory. Section 192.042(1), Florida Statutes, assesses real property as of January 1 each year and states that improvements or portions not substantially completed on January 1 shall have no value placed on them. Substantially completed means the improvement, or some self-sufficient unit within it, can be used for the purpose for which it was constructed. A house finished in the back half of a year misses that January 1 snapshot, so the gap the county has to bridge by direct collection runs longer.

The cheapest CO month on the fiscal 2027 schedule is June at $187.17 and the most expensive is July at $873.44, which puts $686.27 on which side of a month-end the building department signs off. Closing dates on to-be-built homes move, so raise this before you are standing at a walkthrough in the last week of June.

What happens after the first payment

These are non-ad valorem assessments, which section 197.3632(1)(d), Florida Statutes, defines as assessments not based on millage that can become a lien against a homestead as permitted by section 4, Article X of the State Constitution. Once they are collected on the tax notice, section 197.3632(8)(a) subjects them to all of the collection provisions of chapter 197, including the discount for early payment, prepayment by installment, deferred payment, the penalty for delinquent payment, and the issuance and sale of tax certificates and tax deeds for nonpayment.

That last clause is what separates this from an ordinary service bill, since nonpayment runs through the same machinery as unpaid property taxes and ends in a tax certificate against the property. The Osceola County Tax Collector mails real estate tax statements on or before November 1, applies a 4 percent discount in November stepping down to 1 percent in February, takes the gross amount through March 31, and treats the bill as delinquent on April 1.

Expect the assessments and the ad valorem taxes to behave differently in year one. The assessments are settled in cash at the CO and the tax side lags, because the same January 1 rule that drives the fourteen-month row also keeps the house off the roll. Our breakdown of why a new home’s first tax bill carries only the lot walks through that lag and the escrow re-analysis that follows it.

The larger bill was already paid, before the permit

Impact and mobility fees are a separate event, earlier and far larger. Osceola County assesses them during plan review and requires payment prior to permit issuance, with no deferral, collecting roads, schools, parks and fire on new residential construction. At the rates effective June 20, 2025, a countywide single-family dwelling unit carries $21,710.14 in mobility fee, $12,923.00 in school impact fee, $2,304.72 for parks and $780.00 for fire, totaling $37,717.86.

Three conceptual master plan areas pay a different mobility fee for the same house. The single-family total runs $36,661.46 in the East of Lake Toho CMP area, $36,021.48 in South Lake Toho and $37,354.72 in the Alligator Chain of Lakes area, against $37,717.86 countywide, a spread of $1,696.38 driven entirely by the mobility component. Those fees fall on whoever pulls the permit, which on a to-be-built home is the builder. The CO-stage assessments are a later, separate collection, and which party absorbs them is a question your purchase contract answers rather than the county. Where the community also sits inside a community development district, that is a third layer again, and our look at CDD assessments on new Kissimmee homes covers how those land on the same annual notice.

What to ask before you sign

1. Confirm in writing whether the lot is in unincorporated Osceola County or inside a city. The county schedule above only applies to the unincorporated area.
2. Ask the builder, in writing, who pays the prorated fire rescue and solid waste assessment at the certificate of occupancy, and whether it appears on the closing statement.
3. Ask for the builder’s target CO month. If it is late June, ask what happens to that number if the CO slips into July.
4. Pull the current proration table from the county yourself at closing time. The one above is the fiscal 2027 schedule and a new one takes effect each October 1.
5. Budget the annual figure separately from your mortgage escrow until you have seen it appear on an actual November tax notice.
6. Ask whether the community is in a CDD and request the district’s assessment schedule, which is a different charge on the same bill.

Frequently asked questions

Is the Osceola fire rescue and solid waste assessment part of my property taxes?

It rides the same bill but it is not an ad valorem tax. Section 197.3632(1)(d), Florida Statutes, defines a non-ad valorem assessment as one not based on millage that can become a lien against a homestead. The amount does not move with your assessed value or the millage rate. It is collected under the Uniform Assessment Collection Act, which section 197.3632(8)(a) subjects to the same chapter 197 collection rules as taxes, including tax certificates for nonpayment.

Why is my neighbor’s first assessment payment lower than mine?

Almost certainly because their certificate of occupancy was issued in a different month. The fiscal 2027 schedule is keyed to the CO month alone and runs from $187.17 for a June CO to $873.44 for a July CO. Nothing about square footage, lot size or sale price enters the calculation, and the figure is stated per dwelling unit.

Does this replace a monthly trash bill?

For residential dwelling units in unincorporated Osceola County, the county assesses solid waste collection annually rather than billing it monthly, alongside the annual fire rescue assessment. The initial prorated amount is collected once at the certificate of occupancy, and the annual assessment is collected afterward on the property tax notice. Owners inside a city should confirm how that city handles collection, since the county’s service assessments are described as applying within the unincorporated county.

Where to go from here

The fourteen-month row is the one to watch, because it turns a scheduling detail into a $686.27 swing that nobody raises at the design center. If you are weighing new construction anywhere across Osceola County or the rest of our Central Florida service area, book a strategy session with our team at mvphomegroup.com/nelsoncruz. We read the fee schedules, the CDD filings and the contract before anyone signs. This is general information about Osceola County’s published schedules and Florida statutes, not legal or tax advice, and rates change each fiscal year.

Featured image: AI-generated editorial illustration of two wheeled waste and recycling collection carts standing on the new concrete driveway of a just-completed single-story home, with a yellow fire hydrant, new curb and freshly laid sod beside them. No readable text or signage. Not a particular property.