The tentative budget to be presented next week to the Barrow County Board of Education will include a proposed property tax rate hike of eight percent. The move would bring the system’s tax rate to a total of 20 mills from the current 18.5 mills. Twenty mills is the maximum allowed for school systems in Georgia. Although the BOE won’t set the final tax rate until the fall after the digest is completed, it has to set its budget in June. School budgets run on a fiscal year cycle that begin July 1.