The Westerville City School District could be owed as much as much as $1 million by Columbus City Schools because of overpayment for the districts' Win-Win agreement.

The Westerville City School District could be owed as much as much as $1 million by Columbus City Schools because of overpayment for the districts' Win-Win agreement.

Columbus schools have been re-examining the last 10 years worth of Win-Win payments for central Ohio schools.

Due to inaccuracies, Columbus schools have not billed central Ohio districts for the agreement this year.

"We typically get this bill in November, and we didn't get a bill," Westerville schools Treasurer Bart Griffith said.

The district generally pays about $1 million for the 26-year-old agreement each year, Griffith said.

Under the deal, suburban school districts maintain their boundaries within the city of Columbus while paying a share of tax revenue for commercial properties that fall within Columbus. Payments are capped at $1,050,000.

Columbus City Schools handles the billing for the agreement, Griffith said. While Columbus checks past records for inaccuracies, the suburban districts that are billed for the agreement have hired lawyers to review past payments, as well.

"They're just trying to figure out who owes what to whom," Griffith said. "Based on the calculations that we were given, they owe us about $1 million."

According to Columbus schools, some suburban districts have overpaid on the agreement while others have underpaid.

In addition to determining who owes whom money, the districts are working together to figure out how the financial scores will be settled, Griffith said.

"I think they're going to try to come up with some solution where it might be paid back over time," he said. "Could we say we want our million dollars now? Well, maybe, but that's in our best interest, that's not in the best interest of all the districts."

Westerville City Schools spokesman Greg Viebranz said the issue of inaccurate billing has not shaken faith in the Win-Win agreement, which was last renewed by the Westerville Board of Education for six years in 2010.

That fact that all districts are working together to come to a resolution is key, Viebranz said.

"That reaffirms that all parties remain committed and are working to maintain the principals of the Win-Win agreement," he said.

The districts also are working to ensure that such errors don't occur in the future, Griffith said.

"I've got to believe the group is going to look at having somebody double check the figures so that we don't have this happen again," he said.