East Riding of Yorkshire Council has told residents they will be reimbursed for any costs incurred after a bureaucratic blunder led to council tax being collected early.
Council bosses said residents who have had to pay bank charges if their account was overdrawn as a result of the early direct debit payments will get their costs covered.
A council spokesman blamed the mistake on outsourcer Arvato, which runs the authority’s council tax administration.
A statement said: “Council tax administration in this area is contracted out to a company called Arvato and any costs incurred in rectifying the situation will be borne by them and not by council tax payers
“At this stage it is not known how many people have been adversely affected but steps are in place to help those who have been.
“Individual letters are now in the post to all those affected to alert them, providing them with telephone contact details and assuring them that any resulting bank charges will be reimbursed.
“All remaining dates in the calendar year for processing and collection of council tax have been checked and found to be correct.
“We apologise for the inconvenience this has caused and are now focusing on remedying the situation.”