Boone County property tax is levied each year on both real estate and personal property based on values the county assessor sets as of January 1, with bills mailed in the fall and payment due by December 31. Your bill funds schools, fire protection, the library, roads, and city or county government, and the amount depends on where your property sits, what it is worth, and which taxing districts overlap the parcel. Two homes with identical market values on opposite sides of a school district line can owe noticeably different amounts.
How Your Tax Bill Is Calculated
The Boone County Assessor estimates fair market value for every parcel as of January 1, drawing on recent sales of comparable properties, the physical characteristics of the land and buildings, and any improvements on record. Missouri law requires reassessment every two years, in odd-numbered years. In even years your value usually stays put unless you built, added, or removed something.1Boone County Assessor. General Real Property Information
Market value is not what you pay tax on. Missouri converts it to an assessed value using fixed percentages set by the state constitution and RSMo 137.115:
- Residential property: 19% of market value
- Agricultural land: 12% of productivity value (not market price)
- Commercial and all other property: 32% of market value
A home worth $250,000 has an assessed value of $47,500. A commercial building at the same market price is assessed at $80,000.2Missouri Revisor of Statutes. Missouri Code 137.115
Your bill comes from multiplying that assessed value by the combined levy rate of every taxing entity covering your parcel, expressed per $100 of assessed value. On a $47,500 assessed value with a combined rate of $6.50 per $100, the annual tax is $3,087.50.1Boone County Assessor. General Real Property Information Farmland is the outlier: it’s valued by soil productivity grade, with per-acre values assigned by the State Tax Commission that run far below market prices.3Boone County Assessor. Agriculture Land Assessment
What Levy Rates Look Like Across the County
School districts drive most of the bill. For 2025, the Columbia Public Schools levy was $5.5542 per $100 of assessed value, Southern Boone County R-1 was $5.7901, and Hallsville R-IV was $4.8601.4Boone County. Boone County Tax Entities and Rates
Layered on top for 2025: County of Boone at $0.2792, Boone County Fire Protection District at $0.8741, Columbia Boone County Library District at $0.2943, and the City of Columbia at $0.3907. A Columbia homeowner in the Columbia Public Schools district faces a considerably higher combined rate than someone in unincorporated Boone County under a different school district. You can look up the exact combination for your parcel through the Boone County Collector’s online bill search.4Boone County. Boone County Tax Entities and Rates
Personal Property Tax and the March 1 Declaration
Missouri taxes tangible personal property. Vehicles are the big one, but boats, manufactured homes, trailers, and aircraft are also included. What you own on January 1 is what you owe on, even if you sell it January 2.
The assessor mails a declaration form each year. You must return it, with any corrections, additions, or deletions, by March 1. You can also file online through the assessor’s website.5Boone County Assessor. Personal Property Declarations FAQs
Miss the deadline and a penalty kicks in that scales with the assessed value of the unreported property, from $15 for property assessed up to $1,000 to $105 for property assessed at $9,001 or more. There is a grace window: file before May 1 and the penalty doesn’t apply. After May 1, it sticks.6Missouri Revisor of Statutes. Missouri Code 137.280
The assessor will waive penalties in narrow situations, including taxpayers deployed out of state on military orders, forms mailed on time to the wrong county, and cases where the assessor’s office never mailed the form.6Missouri Revisor of Statutes. Missouri Code 137.280
When Payment Is Due
Statements go out in the fall. The full balance is due by December 31, and anything unpaid becomes delinquent on January 1.7Boone County Collector. Methods of Payment
For mailed payments, the USPS postmark controls. A payment postmarked December 31 is timely even if it arrives in January. Without a postmark or cancellation, the payment must physically reach the Collector by December 31. If you use your bank’s online bill-pay, the Collector recommends starting the payment by December 20 so it arrives in time.7Boone County Collector. Methods of Payment
Ways to Pay
The Boone County Collector’s office is at 801 E. Walnut St., Room 118, in Columbia. Payment options:
- Online or by phone with an e-check (flat $1.50 fee) or credit card (2.3% convenience fee, minimum $1.50) through the Collector’s website or by calling (877) 690-3729. The processor keeps the fees, not the Collector.
- Check or money order by mail to 801 E. Walnut St., Rm 118, Columbia, MO 65201-4890, with the payment stub from your statement enclosed so it posts to the right account.
- Drop box at the east entrance of the Boone County Government Center.
- In-person payment at Room 118 during business hours.
A returned check triggers a $25 fee plus any late penalties that have accrued since the original payment date.7Boone County Collector. Methods of Payment
What Happens If You Pay Late
Late penalties and interest begin accruing on the first day of each month a balance remains unpaid. Missouri caps the penalty on property redeemed before sale at 2% per month, and the total annual charge can reach 18% on property that sits delinquent long enough to be listed for sale.8Missouri Revisor of Statutes. Missouri Code 140.100
Real property that stays delinquent for three years must be offered at tax sale. Owners can redeem the property within 90 days of the first, second, or third offering by paying everything owed plus interest. After a third offering, the buyer receives a collector’s deed with no redemption period, and the original owner loses the property.9Missouri Revisor of Statutes. Missouri Code 140.250
Credits and Exemptions
Missouri does not offer a general homestead exemption. Every homeowner pays on the full 19% residential assessment; there is no automatic reduction based on owner-occupancy. The relief programs that do exist are narrow.
Missouri Property Tax Credit (Circuit Breaker)
This is a state income tax credit, not a reduction to your county bill. It is available to Missouri residents who are 65 or older or who have a 100% disability. The maximum credit is $1,100 for homeowners and $750 for renters, with income limits roughly between $27,000 and $34,000 depending on filing status and whether you rent or own. You claim it by filing Form MO-PTC with the Missouri Department of Revenue.10Missouri Department of Revenue. Property Tax Credit
Disabled Veterans and Former POWs
Veterans with a 100% service-connected disability rating from the VA can claim the same Property Tax Credit under the same income and amount limits. Former prisoners of war with a 100% total service-connected disability qualify for a full exemption on their homestead under the Missouri Constitution, meaning the real property tax bill drops to zero.11MyArmyBenefits. Missouri Military and Veterans Benefits
How to Appeal an Assessment
If you think the assessor’s value is too high, you can challenge it. There are three levels, each with a firm deadline.
Informal Review
Contact the Boone County Assessor’s Office first. Bring recent comparable sales, photos of defects the assessor didn’t see, or documentation of errors in the property record such as wrong square footage or a bathroom that doesn’t exist. Many disputes end here without a formal hearing.
Board of Equalization
If informal review doesn’t resolve it, file a written appeal with the Boone County Clerk, who serves as secretary to the Board of Equalization. The appeal must be filed before the second Monday in July, though the board can extend that deadline at its discretion.12Missouri Revisor of Statutes. Missouri Code 137.385
You carry the burden of proof. Effective evidence includes a private appraisal (expect $375 to $1,000 for a residential appraisal), comparable sales data, or documentation of physical problems that reduce value. Unsupported opinions about value rarely succeed.
State Tax Commission
If the board rules against you, appeal to the Missouri State Tax Commission by September 30 or 30 days after the board’s decision, whichever is later. There is no filing fee, and you can file online, by email, or by mail.13Missouri Revisor of Statutes. Missouri Code 138.430 You must have appealed to the Board of Equalization first; the Commission will not hear cases that skipped that step.14Missouri State Tax Commission. Property Tax Appeals Before the STC of MO
If Your Mortgage Company Pays the Bill
Most mortgaged homeowners never write a check to the Collector directly. The lender collects property taxes monthly, holds them in escrow, and pays the county when the bill comes due. Under the federal Real Estate Settlement Procedures Act, your lender must run an annual escrow analysis and send you a statement showing what was collected and paid, and it must refund any surplus above a two-month cushion. Shortages spread across the next 12 payments, which is why a reassessment year can push your mortgage payment up even when your rate hasn’t changed.15Federal Reserve. Consumer Compliance Handbook: Real Estate Settlement Procedures Act
Even so, the tax bill is legally yours. Lenders sometimes miss payments or pay the wrong parcel, and when that happens the penalties fall on your property, not on the bank. Compare your annual escrow statement against your Boone County tax bill and confirm the amounts match.