Ohio Rev. Code § 727.27: Payment schedule.

Special assessments are payable by the time and in the manner stipulated in the assessing ordinance passed under section 727.25 of the Revised Code, except that any such assessment in the amount of twenty-five dollars or less, or any unpaid balance of any such assessment which is twenty-five dollars or less, shall be paid in full, and not in installments, at the time the first or next installment would otherwise become due and payable, and are a lien from the date of the passage of such ordinance upon the respective lots or parcels of land assessed.