May 2027 property tax dates
6 announced dates and 11 statutory dates in the verified sample.
Last updated October 24, 2026, US Central build date. A listed due date is not necessarily the last penalty-free payment date. Read the exact source wording. These are county and payment-plan records, not a complete national schedule.
Announced dates
Clackamas County, OR
Final one-third installment
Due . announced.
Official due-date source. Verified October 24, 2026.
Due-date source wording
No discount is allowed on a 1/3 payment by November 16, 2026, with additional 1/3 payments due on February 16, 2027, and May 17, 2027.
Last penalty-free payment date: unverified here. Confirm with the county.
Deschutes County, OR
Third installment
Due . announced.
Official due-date source. Verified October 24, 2026.
Due-date source wording
May 17th, 2027 - Monday
Last penalty-free payment date: unverified here. Confirm with the county.
Lane County, OR
Final one-third installment
Due . announced.
Official due-date source. Verified October 24, 2026.
Due-date source wording
May 17, 2027 – Third Trimester
Last penalty-free payment date: unverified here. Confirm with the county.
Multnomah County, OR
Third installment
Due . announced.
Official due-date source. Verified October 24, 2026.
Due-date source wording
Taxes may be paid, without discount, in three equal installments due Nov. 16, 2026, Feb. 16, 2027, and May 17, 2027.
Last penalty-free payment date: unverified here. Confirm with the county.
Washington County, OR
Third installment
Due . announced.
Official due-date source. Verified October 24, 2026.
Due-date source wording
Taxes may be paid in three installments due November 16, 2026; February 16, 2027; and May 17, 2027.
Last penalty-free payment date: unverified here. Confirm with the county.
Gallatin County, MT
Second real-property installment
Due . announced.
Official due-date source. Verified October 24, 2026.
Due-date source wording
2026 REAL PROPERTY TAX BILLS WILL BE COMING OUT SOON. FIRST DUE DATE IS 30 DAYS FROM DATE OF THE BILL, SECOND DUE DATE IS MONDAY MAY 31ST 2027.
Last penalty-free payment date: unverified here. Confirm with the county.
Statutory dates
Douglas County, KS
Second half
Due . statutory.
Official due-date source. Verified October 24, 2026.
Due-date source wording
may pay, at such person's option, the full amount thereof on or before December 20 of each year, or 1/2 thereof on or before December 20 and the remaining 1/2 on or before May 10 next ensuing.
Published last penalty-free payment date: . statutory.
Official cutoff source. Verified October 24, 2026.
Payment cutoff source wording
may pay, at such person's option, the full amount thereof on or before December 20 of each year, or 1/2 thereof on or before December 20 and the remaining 1/2 on or before May 10 next ensuing.
Johnson County, KS
Second half
Due . statutory.
Official due-date source. Verified October 24, 2026.
Due-date source wording
the full amount thereof on or before December 20 of each year, or 1/2 thereof on or before December 20 and the remaining 1/2 on or before May 10 next ensuing.
Last penalty-free payment date: unverified here. Confirm with the county.
Leavenworth County, KS
Second half
Due . statutory.
Official due-date source. Verified October 24, 2026.
Due-date source wording
the full amount thereof on or before December 20 of each year, or 1/2 thereof on or before December 20 and the remaining 1/2 on or before May 10 next ensuing.
Published last penalty-free payment date: . statutory.
Official cutoff source. Verified October 24, 2026.
Payment cutoff source wording
the full amount thereof on or before December 20 of each year, or 1/2 thereof on or before December 20 and the remaining 1/2 on or before May 10 next ensuing.
Sedgwick County, KS
Second half
Due . statutory.
Official due-date source. Verified October 24, 2026.
Due-date source wording
the full amount thereof on or before December 20 of each year, or 1/2 thereof on or before December 20 and the remaining 1/2 on or before May 10 next ensuing.
Last penalty-free payment date: unverified here. Confirm with the county.
Jackson County, OR
Final one-third
Due . statutory.
Official due-date source. Verified October 24, 2026.
Due-date source wording
The remaining one-third on or before May 15 next following.
Last penalty-free payment date: unverified here. Confirm with the county.
Josephine County, OR
Final third (statutory date)
Due . statutory.
Official due-date source. Verified October 24, 2026.
Due-date source wording
The remaining one-third on or before May 15 next following.
Last penalty-free payment date: unverified here. Confirm with the county.
Marion County, OR
Final one-third installment — statutory date
Due . statutory.
Official due-date source. Verified October 24, 2026.
Due-date source wording
The remaining one-third on or before May 15 next following.
Last penalty-free payment date: unverified here. Confirm with the county.
Polk County, OR
Final third (statutory date)
Due . statutory.
Official due-date source. Verified October 24, 2026.
Due-date source wording
The remaining one-third on or before May 15 next following.
Last penalty-free payment date: unverified here. Confirm with the county.
Yamhill County, OR
Final one-third — statutory date
Due . statutory.
Official due-date source. Verified October 24, 2026.
Due-date source wording
The first one-third on or before November 15; The second one-third on or before February 15; and The remaining one-third on or before May 15 next following.
Last penalty-free payment date: unverified here. Confirm with the county.
Cascade County, MT
Second half, ordinary two-payment schedule
Due . statutory.
Official due-date source. Verified October 24, 2026.
Due-date source wording
one-half of the taxes are payable on or before 5 p.m. on November 30 of each year or within 30 days after the tax notice is postmarked, whichever is later, and one-half are payable on or before 5 p.m. on May 31 of each year.
Last penalty-free payment date: unverified here. Confirm with the county.
Flathead County, MT
Second half — statutory date; holiday adjustment applies
Due . statutory.
Official due-date source. Verified October 24, 2026.
Due-date source wording
one-half of the taxes are payable on or before 5 p.m. on November 30 of each year or within 30 days after the tax notice is postmarked, whichever is later, and one-half are payable on or before 5 p.m. on May 31 of each year.
Last penalty-free payment date: unverified here. Confirm with the county.
Methodology and coverage limits | Download all report dates
Not tax or legal advice; confirm with your county.