Missouri SB 190 Senior Property Tax Freeze — Complete KC Metro Guide

Missouri Senate Bill 190 — signed into law in 2023 and amended in 2024 — gives residents 62 and older the ability to freeze their property tax bill at the amount they paid the year they applied. The frozen bill can decrease if home values fall. It cannot increase while you remain enrolled and eligible. In a metro where assessed values have spiked 30% in one cycle (Jackson County, 2023), the freeze is not a nice-to-have — for qualifying buyers, it is the most important financial feature of buying on the Missouri side of the state line.

How SB 190 Works — The Mechanics

Missouri assesses residential property at 19% of market value. The tax bill is then your county's levy rate applied to that assessed value. When your home's market value increases — say, from $320,000 to $380,000 — your assessed value rises from $60,800 to $72,200, and your tax bill goes up proportionally. Without SB 190, there is no cap on how much your bill can increase between reassessment cycles (except Missouri's 15% statutory cap on increases without a physical inspection).

With SB 190, once you apply and are approved, your tax bill is frozen at that year's dollar amount. If the county raises levy rates, those increases don't affect you. If your assessed value jumps 15% next cycle, that jump doesn't affect your bill. The only way your frozen bill goes down is if the assessed value falls — and the only way you lose the freeze is if you stop using the property as your primary residence, sell it, or die.

When the property changes hands, the freeze does not transfer. The new buyer must apply fresh. This means the freeze is personal to you, not attached to the home — a fact that some sellers forget to mention and some buyers don't think to ask about.

The Four KC Metro Counties — Each One Different

The Dollar Math — What the Freeze Actually Saves

These calculations assume a 5% annual home value appreciation rate, which is approximately the KC metro average over the past decade. Your actual appreciation will differ. The point is the compounding effect of having a frozen bill vs an unfrozen one.

Savings calculated as cumulative difference between frozen and unfrozen bills over 5 years, assuming 5% annual appreciation. 10-year and 15-year savings are materially larger due to compounding. Tax rates approximate 2025 effective rates.

What "Can Go Down But Not Up" Actually Means

The freeze doesn't fix your bill at an arbitrary number. It fixes it at the year's assessed amount when you applied. If your county conducts a reassessment the following year and your home value decreases — which happens in down markets — your frozen bill adjusts downward to the new assessed amount. The asymmetry is entirely in your favor: you capture decreases, you are protected from increases.

This means the best time to apply is when values are high (or expected to rise), not when they're depressed. Buyers who purchase during a market peak and apply immediately lock in the peak-year bill as their permanent floor — which is higher than buyers who applied during a soft market. The calculus argues for applying as soon as you're eligible rather than waiting.

Eligibility — The Rules That Matter

You must be 62 or older — the Social Security eligible age — as of January 1 of the application year. The property must be your primary residence. You must be the owner of record and responsible for the property tax. Trusts, LLCs, and other entities holding title complicate eligibility; consult an attorney if your ownership structure is anything other than individual ownership.

The home value cap that originally limited eligibility to properties below a certain assessed value was removed in the 2024 amendments. Luxury homes now qualify alongside modest ones. There is no income limit.

Missouri vs Texas vs Tennessee — The National Context

Missouri's SB 190 is materially stronger than Texas's senior school tax ceiling because Missouri freezes the entire bill, not just the school district portion. Texas homeowners 65+ see their school taxes frozen at 65 — but county, city, and special district levies continue rising uncapped. A Texas senior can have a "frozen school tax" while their total bill increases 20% over five years because the non-school components are unrestricted.

Tennessee's program applies an income cap that disqualifies most retirees with meaningful pension income. Missouri has no income limit, no home value cap, and freezes 100% of the bill — not a portion of it.

Practical Application Steps

Jackson County: Visit jacksongov.org, navigate to the Collector's property tax section, and complete the online application. Provide proof of age and proof of primary residence. The county confirms the application and applies the freeze to the following year's bill. No renewal required.

Clay County: Apply January 1 through March 31 at the Clay County Assessor's office or claycountymo.gov. Bring a government-issued ID showing age, your most recent tax receipt, and proof of residency (utility bill or similar). The annual affidavit renewal is typically a one-page form confirming nothing has changed. Missing the March 31 window means waiting until next January.

Platte County: Apply October 1 through December 31 at the Platte County Collector's office. Annual renewal required. The October window exists because Platte County bills go out in November — the freeze application cycle is designed to coincide with billing. Documentation is similar to Clay County.

Cass County: Contact the Cass County Collector for current application window and procedures. Requirements should be similar to other counties; verify before the window closes.