The landowners of 33 properties in Hastings' designated CBD will receive annual rates increases of up to $620, after the council discovered it was undercharging them.
Gordon Vogtherr, 90, who owns three properties in Hastings, said he received a "rude, and crude" letter from the council, advising him of the rates hike.
The letter from council, dated May 7, said a recent audit had revealed that "no targeted rate" was being applied to his properties, and would be applied from next month onwards.
"It was made to look like we were the culprits," he said.
The targeted rate was introduced in the mid 1990s, collected by council on behalf of the Hastings Business Association, to fund activities including event staging and the revitalisation of the central business area.