Olathe's Tax Rates Barely Moved. So Why Is November's Bill Higher?

If you're buying a home in Olathe and closing before the end of the year, the date on the closing statement now matters more than usual. Kansas law sets a default for who pays the year's property taxes when a contract doesn't say. Under K.S.A. 79-1805, the buyer pays on land conveyed from Jan. 1 through Oct. 31, and the seller pays on land conveyed from Nov. 1 through Dec. 31. Since Nov. 1, any Olathe sale that closes during the rest of 2026 falls in the seller's window unless the contract says otherwise.

The bill that rule assigns is in the mail now or will be soon, and it will likely be higher than last year's. The city held its rate. The school district's rate barely moved. Both bodies will still collect more money in 2027 because the number that drives your bill is the appraised value the rate is applied to. In Olathe this year, that value went up.

The dates that decide who owes what

Kansas taxes become due on Nov. 1, and that same day a tax lien attaches to the property and stays until the tax is paid, according to K.S.A. 79-1804. Johnson County then works on its own schedule.

The county's dates and deadlines page says a filing deadline that falls on a weekend or legal holiday moves to the next business day, which is why both protest dates shift this cycle. Payment dates have shifted before too. Last year the county started mailing statements on Nov. 12, and because Dec. 20 fell on a weekend, the first-half deadline moved to Monday, Dec. 22, 2025. Your 2026 statement shows the due date that applies this year.

The 79-1805 split is only a default. Many purchase contracts say who pays the taxes, and the statute applies only when they don't. It also doesn't split the county's bill by days of ownership. It sets who owes the bill as between buyer and seller.

The school rate barely moved, but its total jumped

Olathe Public Schools is the largest piece of an Olathe tax bill. According to the Johnson County Post, the district receives about 54% of property taxes and the city about 20%. USD 233's 2026–27 state budget form is headed "Exceeding Revenue Neutral for the 2026-2027 School Year." Its totals show where the money comes from.

From last year to this one, the rate goes up 0.147 mill. The dollars go up about $11.2 million, or roughly 4.8%. The middle row shows why. Because the appraised base grew, the district could have collected about the same dollars as last year at 59.234 mills. The revenue-neutral rate is the rate that holds collections flat, and the proposed rate is 2.861 mills above it. Nearly all of the extra $11.2 million comes from leaving the rate about where it was while the base grew underneath it.

Kansas has a process for exactly this. The county clerk calculates each taxing body's revenue-neutral rate. A body that wants to go above it must notify the clerk, give taxpayers notice of a hearing at least 10 days ahead, hold that hearing, take comment and vote, according to the Kansas Legislative Research Department. The state's notice and hearing materials were amended in 2025. USD 233 held its hearing on Sept. 3, 2026, at 14160 South Black Bob Road. The 62.095 figure on that form is the proposed rate. The rate actually levied is what will show on your statement.

The city did the same thing at a smaller scale

The City Council approved Olathe's 2027 budget 5–1 on Sept. 15. The Johnson County Post reported that the levy stays at 23.3 mills and that the city is exceeding its revenue-neutral rate, which means it will collect more in property taxes in 2027 than this year. The city's own budget announcement says the same thing: the rate is flat, but bills may rise as assessed values go up.

The math is short. Kansas assesses homes at 11.5% of appraised value. The Johnson County Appraiser puts the average Olathe home at $457,425 for 2026. That gives about $52,604 in assessed value, which works out to $1,225.67 for the city at 23.3 mills. The 2025 average was $437,657. Run that value through the same 23.3 mills and the city portion is about $1,173. That's roughly $53 more on the average home with no change in the rate.

The county is in the same position. Johnson County's adopted 2027 budget holds its mill levy flat at a published rate of 24.119 mills. City Manager Susan Sherman told the council in July that the city wants commercial growth to share the load. "When businesses are paying property tax, that helps make residential property tax maybe less of a burden," she said, as reported by the Johnson County Post.

The base did not grow evenly across Olathe

The average Olathe value rose about 4.5% from 2025 to 2026. That's a bit below the roughly 6% increase the county reported for non-apartment residential property countywide. An average can hide pockets that rose faster. The Johnson County Post's reading of the appraiser's map identified a smaller zone in Olathe, near the center of the county where I-35 and K-7 meet, as one of the areas where values rose between 8% and 9.4%. Almost the entire western edge of the county rose 4% to 5%.

Because rates stay flat across the whole city, a home inside that faster-rising zone takes on a bigger share of the extra collections than a home where values grew more slowly. For buyers comparing two Olathe homes at similar prices, the seller's last bill reflects last year's appraisal. The next bill will reflect how that part of town moved.

A purchase price feeds the system, but it does not set your value

Buyers often ask whether their purchase price becomes their appraised value. In Kansas, a deed generally has to be filed with a real estate sales validation questionnaire that reports the total sale price, and that questionnaire goes to the county appraiser. From there, Johnson County says it values homes using comparable sales, adjusted for differences like age, size, condition and garages. The Kansas Department of Revenue's homeowner guide says, "One sale by itself does not determine market value."

You'll also hear about a "90 to 110 percent" standard. KDOR's ratio study defines that band as an acceptable range for the county's median sales ratio, and it says the study is not for reviewing individual property appraisals. It measures how closely the county's appraisals track sale prices as a whole. It doesn't promise that any one home will land in that range of its own sale price.

Topeka did not change the math for 2026

Property tax relief got serious attention in the 2026 session, and none of it passed. The Senate's valuation-cap amendment, SCR 1603, died when the House did not adopt the conference report on April 9. HCR 5008 failed the next day. HB 2745 was vetoed, and the House sustained the veto. KCUR described the session as ending without substantial property tax reform. The only constitutional amendment on the Nov. 3 ballot dealt with voter citizenship, not property taxes. For this bill and the next one, the same mechanism applies: rates held roughly steady and applied to a growing base.

Quick answers

Can I protest the bill that's arriving now? Johnson County accepts Payment Under Protest filings starting Nov. 1. The standard cutoff is Dec. 20, or Jan. 31 when an escrow agent paid at least half. Both dates fall on a Sunday this cycle, and under the county's next-business-day rule they become Monday, Dec. 21, 2026, and Monday, Feb. 1, 2027. The county says an owner who already met with the appraiser on that tax year may not file one. The county also cautions that a protest may not help if the objection is simply that taxes are too high, as opposed to the valuation or calculation being wrong.

When can I appeal next year's value? Johnson County's rule is to appeal within 30 days of the notice's mailing date, "typically by March 31." The date on your own notice is the one that controls.

Where can I see the bill on a specific Olathe home? The county's property tax lookup lets you search by address for current and prior-year bills.

This is general information about how Kansas and Johnson County taxes work, not legal, tax or financial advice, so please confirm your own situation with an attorney, tax professional or your lender.

If you're writing an offer on an Olathe home this fall, I'm glad to pull the property's past tax bills with you, look at where it sits on the appraiser's map and walk through how the purchase contract handles this year's taxes, so you can take any questions to your attorney before you sign. Reach out to Dez Poole to schedule a free consultation.