Notice and timing
How delinquency is handled
Grace period after the due date
No single day-count grace period is published in the reviewed current materials. During the billing-system recovery, late fees and shutoffs were suspended; the City announced that late fees would resume in December 2025 or January 2026 depending on the billing cycle, with shutoffs beginning in January or February 2026 for accounts not brought current or placed on an approved plan.
Late-fee calculation
The City’s public 2026 pages do not state the exact late-fee dollar amount or percentage. Billings resumed normal late-fee processing after the conversion-related suspension, and a payment plan can prevent shutoff if its requirements are met, although the City’s update warns that late fees may still apply. Customers awaiting a billing investigation were told they could wait for a response without penalty in the recovery period; current account-specific charges should be confirmed at (406) 657-8315 option 3.
Disconnection timeline
The current published recovery schedule says that outstanding balances not covered by a payment plan move toward shutoff beginning in January or February 2026, depending on the bill cycle. The reviewed pages do not publish the exact number of days between each notice and field termination; customers should contact the service center promptly because maintaining a current payment plan prevents service shutoff under the City’s published guidance.