Jefferson County, MissouriProperty records & tax offices
Links open the listed public-office or service-provider website in a new tab. This directory does not collect payments.
Find the right property record
Use the property portal for ownership and assessed value, the collector for a bill or balance, and the map for parcel location. Have the address, owner name, or parcel number ready.
Tax bills & filing dates
These are the dates and qualifications recorded in the directory. Confirm your tax year and current deadline with the official office and your property’s notice.
- Tax bill mailing
- November–December 2026; Jefferson County’s assessment calendar states tax bills are prepared and sent during November through December, but no specific 2026 mailing day was published.
- Payment deadline
- For the 2026 tax year, Missouri real-estate and personal-property taxes are due December 31, 2026; payment must be received or postmarked by December 31 to avoid statutory penalty and interest.
- Assessment appeal
- July 13, 2026 (the second Monday in July; Jefferson County’s assessment calendar and appeal form identify this as the local Board of Equalization filing deadline); Missouri State Tax Commission complaint is due September 30, 2026, or within 30 days after the Board decision, whichever is later.
Exemptions & appeals
Exemption filing
No general Missouri homestead exemption was verified. Jefferson County’s 2026 personal-property assessment list/e-file deadline was May 1, 2026 to avoid the late-filing penalty.
Senior relief
Jefferson County Real Property Tax Credit for Seniors, Ordinance 24-0132: eligible county residents age 62 or older by January 1 of the initial base year who own or have a legal/equitable interest in a homestead, are liable for its real-property taxes, and are not delinquent may apply. New 2026 applications were available March 1–June 30, 2026; approved accounts are reviewed annually and do not require mandatory annual renewal.
Valuation limits
No general local annual valuation cap was verified. Jefferson County’s senior program credits eligible real-property tax liability above the initial base-year liability; it is not an assessment-value freeze and excludes certain levies, new construction/improvements, and annexation-related increases. Missouri assessment ratios are 19% residential, 32% commercial, and 12% agricultural.
For a valuation appeal, use the appeal date in the tax and filing section above. Keep your notice, supporting evidence, and proof of submission.
More exemption & appeal guidance →