You can live in Lee's Summit or Overland Park. Both are in the Kansas City metro. Both have 55+ communities with comparable prices and amenities. The property tax comparison between them is not close, and it gets less close the longer you own the home. This page does the math that listing sites won't do for you.
The Assessment Ratio Difference — Why Kansas Looks Lower Until It Doesn't
Missouri assesses residential property at 19% of market value. Kansas assesses at 11.5% of market value. That means a $400,000 home is assessed at $76,000 in Missouri and $46,000 in Kansas — a 40% difference in assessed value. From this, buyers often conclude Kansas property taxes must be lower. That conclusion is frequently wrong, because the levy rates applied to that assessed value are calibrated differently in each state.
The actual comparison is at the effective rate level — the dollar amount you pay as a percentage of your home's market value. At that level, Missouri and Kansas counties in the KC metro are remarkably similar, ranging from 0.90% to 1.10%. The difference is not the tax rate. The difference is the freeze.
County-by-County Comparison
| Missouri Counties | Effective Rate | Annual Tax on $350K | SB 190 Freeze (62+)? |
|---|---|---|---|
| Jackson County | ~1.10% | ~$3,850 | ✓ Yes — apply once, no renewal |
| Clay County | ~1.04% | ~$3,640 | ✓ Yes — Jan 1–Mar 31, annual affidavit |
| Platte County | ~0.90% | ~$3,150 | ✓ Yes — Oct 1–Dec 31, annual renewal |
| Cass County | ~0.95% | ~$3,325 | ✓ Yes — verify current window |
| Kansas Counties | Effective Rate | Annual Tax on $350K | Senior Freeze? |
| Johnson County | ~1.09% | ~$3,815 | ✗ No equivalent program |
| Wyandotte County | ~1.08% | ~$3,780 | ✗ No equivalent program |
The Takeaway From That Table
Before any freeze is applied, Missouri and Kansas counties in the KC metro are within $200–$700/year of each other on a $350,000 home. Johnson County Kansas is actually more expensive than Clay County Missouri. The initial-year comparison is close. The 10-year and 20-year comparison is not — because Missouri buyers 62+ can freeze their bill, and Kansas buyers cannot.
The Freeze Effect Over Time — Real Dollar Projection
This table assumes 4% average annual home value appreciation — roughly the KC metro's long-run average. It compares a Clay County Missouri buyer with a Johnson County Kansas buyer, both purchasing a $350,000 home in the same year, both turning 62 in year one and applying for the Missouri freeze immediately.
| Year | Home Value (4%/yr) | Clay County MO Tax (Frozen) | Johnson County KS Tax (Unfrozen) | Annual Difference |
|---|---|---|---|---|
| Year 1 | $350,000 | $3,640 | $3,815 | $175 MO advantage |
| Year 5 | $425,530 | $3,640 (frozen) | $4,638 | $998 MO advantage |
| Year 10 | $518,000 | $3,640 (frozen) | $5,646 | $2,006 MO advantage |
| Year 15 | $630,500 | $3,640 (frozen) | $6,872 | $3,232 MO advantage |
| Year 20 | $767,000 | $3,640 (frozen) | $8,360 | $4,720 MO advantage |
Assumes 4% annual appreciation, Clay County MO effective rate 1.04%, Johnson County KS effective rate 1.09%. Freeze locked in at Year 1. Kansas tax rises with assessments at same 4% pace. Actual rates vary; use this as a planning model, not a guarantee.
The cumulative 20-year tax savings from the Missouri freeze in this scenario exceed $40,000. That number is not the product of extreme assumptions — 4% annual appreciation in the KC metro is historically conservative. With 5% appreciation, the 20-year advantage exceeds $55,000.
What Kansas Gets Right — The Income Tax Case
The one scenario where Kansas wins the total tax comparison
Kansas Senate Bill 1 (2024 Special Session) fully exempted Social Security from Kansas income tax — no income cap. Kansas also fully exempts federal civil service pensions, military retirement, and KPERS benefits from state income tax. If your retirement income is primarily Social Security plus a government pension, and you have minimal private pension or IRA income, the Kansas income tax picture is genuinely favorable. Missouri has also fully exempted Social Security since 2024, but public pensions are only partially exempt and private pensions are fully taxable at Missouri's top rate of 4.8%. For buyers with significant IRA or 401(k) withdrawal income, Missouri is the lower-income-tax state. For buyers whose income is almost entirely Social Security and a federal pension, Kansas may come out better on the income side — but the property tax math still favors Missouri over 15+ years of ownership.
The Bottom Line Framework
If you are 62 or older when you buy, intend to stay for 10+ years, and your retirement income includes significant IRA or private pension distributions: Missouri side, apply for SB 190 immediately, and the comparison isn't particularly close over time.
If you are under 62, you won't have freeze access for years. Jackson County's assessment risk during your unprotected window is real. In that case, Clay, Platte, or Cass County on the Missouri side are cleaner options than Jackson County.
If your income is primarily Social Security and a federal pension (military, civil service), and you are buying a home in the $200K–$300K range with a shorter planning horizon: the income tax math may tip Kansas's direction, and the property tax difference at that price point is modest enough in year one to make the KS side competitive.
The full income tax comparison is in our Missouri retirement income tax guide.
Want This Analysis Run on Specific Communities?
Our local agents can model the MO vs KS comparison for the specific communities you're considering, at your price point and age, so you can make the decision with the actual numbers.
Talk to a Local Expert