The figure represents the amount that would have been spent on councillor allowances had the pair completed their terms which were due to end in October.

The resignations took effect from earlier this month with Mr Byatt quitting to take on a government-funded job and Mr Kerr being forced by Labor chiefs to end his tenure to contest the federal election.

Under the Local Government Act, councillor vacancies do not have to be filled if they fall within six months of an election.

The $20,000 estimate is contained in the council's agenda for its June monthly meeting being held on Monday night.

The agenda also includes Mr Byatt's letter of resignation to council chief executive Patience Harrington, which he has requested to be read out at the meeting.

In the letter, Mr Byatt reflects on his nearly eight years as a councillor.

"I have treated the role as an absolute privilege and honour to perform on behalf of the community of the City of Wodonga," he wrote.

"I like to believe I have made a significant contribution to the overall growth, development and future of the city and its aspiration to achieve the status of a dynamic and liveable regional city."

Mr Byatt noted "extraordinary" change in Wodonga since 2008, pointing to the removal of the railway from the CBD and "game changers" such as The Cube and WAVES aquatic centre.

"In addition we have witnessed unprecedented residential and ongoing population growth (that has seen Wodonga continuously ranked as leading the state) and the city's strategic planning stretches well into the future," he wrote.

"We can justifiably proud of how our city is developing and advancing as a vibrant and liveable regional city."

Mr Byatt has been hired by the government-funded Regional Development Victoria in a role that involves dealing with 12 councils across the Hume region.

To avoid a conflict in that capacity, Mr Byatt resigned from Wodonga Council.

"I believe this is a prudent, professional and appropriate decision," he wrote.

Monday's forum will also see Wodonga adopt its 2016-17 budget which has a 2.5 per cent rate rise in line with the Victorian government cap.