"To me, the freeze is so it wouldn't change," a Platte County homeowner told KSHB last December. He was explaining why his 2025 bill came in about $300 higher than his 2024 bill, even though he had qualified for the county's senior credit.
Neither of Platte County's tax relief programs freezes a house. Each one protects a particular owner's tax bill at a particular address. For a seller, and especially for a downsizer 62 or older, that difference shapes the true cost of moving.
The first thing a downsizer loses at closing
The county's senior program comes from Missouri's SB 190. Platte County's FAQ says it plainly: the credit "will not roll over to your new property address and a new application would need to be completed."
An earlier county FAQ walks through an example. Say you applied in 2024 and were approved, then sold and changed addresses in 2025. You file a new application for the new home, and its bill "will be frozen at the 2025 rates."
So a Parkville owner who has held a 2024 base for years doesn't carry that base down the street. The new home gets a fresh base equal to its tax bill in the year you qualify there. If the new home is smaller and its bill is lower, the reset may not matter much. If it's newer, or assessed higher, the protected number starts over at that higher figure.
What the credit actually protects
The Platte County Assessor's July 2026 newsletter calls the idea that SB 190 freezes a property's value "one of the biggest misunderstandings." Enrolled homes are still reassessed, equalized and valued at market value like every other property in the county.
The newsletter's example shows how the math works:
- A qualifying owner's base year tax liability is $4,000.
- After reassessment, the bill would normally come to $5,500.
- The $1,500 difference is applied as a credit, minus any legally excluded charges such as the Blind Pension Fund levy.
Every piece of that calculation is tied to the owner. Under Commission Order 2025-CO-101, the "Initial Credit Year" is the year that taxpayer first qualifies. An eligible taxpayer must be 62 or older, own the home of record, be liable for its taxes, and live in it as their one primary residence. If a later year's bill comes in lower than the base, that lower year becomes the new base. Permitted improvements also raise the protected amount. The county FAQ uses a new deck or added square footage as examples.
That's why the credit can't follow you. It was never attached to the house to begin with.
The second credit, and the question its statute leaves open
In April, Platte County voters approved a second, broader program. The homestead property tax credit comes from Missouri's SB 3, and its statutory definition of an eligible taxpayer sets no age threshold. Voters approved it on April 7, 2026, with 79.4% of the vote, and the County Commission adopted it through Order 2026-CO-110 on July 20. According to the county's homestead page, approved parcels were enrolled automatically on September 21, 2026, and owners who want out can email [email protected]. County Administrator Wes Minder told The Landmark the county has more than 20,000 eligible properties.
The homestead credit's design differs from the senior credit's in one important way. Under RSMo 137.1055, Platte is a "five percent county." That means the protected liability can rise each year by 5% or by the Consumer Price Index, "whichever is greater." The statute also sets the starting point, called the initial credit year, as "the 2024 tax year." Like the senior credit, it adds the value of an owner's new construction and improvements to the base.
The statute doesn't say what happens to that 2024 starting point when a home sells. It defines an eligible taxpayer as an owner of record who lives in the home and pays its taxes, and that's where it stops. Platte County's order repeats the same definitions. Neither text addresses whether a buyer inherits the seller's protected base or starts on a different one. If that question matters to a purchase, the county is the office to ask about the specific parcel.
Here are the two programs side by side, based on the county's published rules:
| SB 190 senior credit | SB 3 homestead credit | |
|---|---|---|
| Who qualifies | Owner-occupants 62 or older | Owner-occupants of any age |
| What sets the base | Tax liability in the year the owner qualifies | The 2024 tax year, by statute |
| Allowed annual growth | None beyond the base, apart from excluded charges and permitted improvements | 5% or CPI, whichever is greater, plus improvements and voter-approved levies |
| How you enroll | Application, Oct. 1 to Dec. 31 | Automatic enrollment on Sept. 21, 2026 |
| What happens when you move | County says it does not roll over and you must reapply | Statute doesn't address it |
Why the calendar matters this fall
For anyone weighing a sale in the next year or so, three dates stack up.
The senior application window is open now. Platte County accepts SB 190 applications from October 1 through December 31, 2026. The county says applications "are only available during that timeframe," and the order says late applications count toward the following year. The county will finish processing by June 30, 2027. Since a December 2025 change, approved participants don't have to reapply each year unless they move, as KSHB reported. Each move means another application in the next window.
2027 is a reassessment year. The Assessor's Office describes the 2027 countywide reassessment as a legally required review of every property value in the county. The work starts in 2026, and final values are set in 2027. Under the county's own moving example, a senior who moves in a given year gets a base set at that year's bill. A move after 2027 values land would set the new base on post-reassessment numbers. For context, the Kansas City Star reported that the 2025 countywide residential increase was settled at 6.835% over 2024.
The homestead credit's start date is in court. On September 29, Jason Maki of Parkville and James Bosch of Edgerton sued County Collector Sheila Palmer. They're asking the court to order the credit applied to 2026 tax bills, as The Landmark reported. KSHB reported that the collector's office had planned to wait until 2027, and that the office said it "stands ready to carry out voters' wishes in accordance with Missouri law." On October 8, Presiding Judge Myles A. Perry recused every judge in the 6th Judicial Circuit from the case. As of this writing, nobody has said whether the November bills will show the credit.
How the closing table handles a tax bill
A closing raises one more mechanical issue. Missouri assesses property as of January 1 each year, per the State Tax Commission. The Missouri County Collectors Association explains that when a home sells mid-year, the bill generally stays in the name of whoever owned it on January 1, and the buyer is responsible for the full bill. Taxes are usually prorated between buyer and seller at closing.
When a seller has a credit on that year's bill, it matters which number the proration uses. Whether you're buying or selling, it's worth asking your title company how the year's estimate treats any senior or homestead credit on the seller's statement.
Who covers the difference
Credits don't make the cost of a school bond or a city budget go away. Last December, the Park Hill School District told KSHB that the senior credit would cost it $1.25 million in 2025 taxes. The district expected it would likely have to raise its debt service levy, which KSHB described as shifting the burden toward property owners under 62. Auditor Kevin Robinson, writing in The Landmark in July, estimated about 8,000 seniors would benefit from SB 190 and about 25,000 homeowners would be eligible for the homestead credit.
So the advantage sits with owners who stay put. The longer someone holds a protected base, the larger the gap can grow between their bill and what the next owner of a comparable home pays. For a downsizer comparing their current bill to a new home's, that gap belongs on the budget alongside the price difference, moving costs and commission.
A few questions we hear often
If I'm already approved for the senior credit and I buy another home in Platte County, do I need to do anything? Yes. The county says a new application is required for the new address, and applications are accepted only from October 1 through December 31.
Does selling cancel the senior credit on my old home's final bill? The county's 2025 FAQ says that when an owner moves or sells, the county notes the change and removes the freeze from that property. For how that plays out in a specific closing year, contact the Platte County Clerk at 816-858-3340 or [email protected].
Can a household get both credits? The county's homestead order lists "Senior Tax Credit status" among the information it used to decide eligibility, but it doesn't spell out how the two credits interact. The County Clerk is the right office to ask.
I'm moving to Gladstone. Does Clay County work the same way? No. Clay County runs its own senior program on a different calendar, with its 2026 window running January 1 through March 31. The Kansas City Star reported that Clay was not among the counties covered by the SB 3 homestead program.
This post is general information about how these programs are written. It isn't legal, tax or financial advice, so please confirm how they apply to your situation with the County Clerk and a tax professional.
If you're thinking about selling and want to see how a new tax bill fits next to your current one before you commit to a move, Northstar Realty can walk through the numbers with you. Contact our Parkville team for a local market consultation.
