| Every day a report is late | Illinois | Fees of US$5 to US$20 a day per late annual financial report, fiscal 2025 and later, until a compliant report is received | 50 ILCS 310/4(c); Comptroller fines FAQ |
| Now to Dec. 1, 2026 | IRS | Annual Form 15644 window for groups whose fiscal year ends December 31 | Rev. Proc. 2026-8 s. 7.01 |
| Nov. 2, 2026 | Water, North Carolina | NC DEQ lead service line funding cut-off (award December 9) | NC DEQ Division of Water Infrastructure |
| Nov. 30, 2026 | Water, Washington | WA Department of Health lead service line loan applications due | WA DOH, DWSRF |
| Dec. 1, 2026 | Water, Iowa | Iowa State Revolving Fund lead service line application deadline | Iowa DNR and Iowa Finance Authority |
| Dec. 9, 2026 | IRS | Our suggested latest arrival for any 30-day removal notice to a chapter | Planning margin |
| About Dec. 23, 2026 | IRS | Last day a 30-day removal notice can run out by January 22, with no margin | Rev. Proc. 2026-8 s. 8.02(2), (3) |
| Dec. 31, 2026 | Water, Missouri | Missouri DNR lead service line grant and loan applications close | Missouri DNR Financial Assistance Center |
| Jan. 22, 2027 | IRS | Transition period for existing group exemption letters ends | Rev. Proc. 2026-8 s. 12.02(2) |
| Jan. 29, 2027 | Water, Georgia | GEFA lead service line pre-applications due, 5:00 p.m. | GEFA, 2027 call for projects |
| Fiscal 2027 | Illinois | Townships and districts under US$1.4 million in revenue may file the report instead of a yearly audit | P.A. 104-635 |
| Nov. 1, 2027 | Water | Baseline service line inventory and replacement plan due to the state; replacement program starts | 40 CFR 141.80(a)(3), 141.84 |
| Jan. 30, 2029 | Water | First yearly inventory update, then every January 30 | 40 CFR 141.90(e)(3) |