Va. Code Ann. § 15.2-541

The county executive shall give bond in the amount of not less than $5,000. The director of finance shall give bond in the amount of not less than fifteen percent of the amount of money to be received by him annually. If the county executive serves also as director of finance, he shall give bond in the full amounts indicated above. The board may fix bonds in excess of these amounts and require bonds of other county officers in their discretion, conditioned on the faithful discharge of their duties and the proper account for all funds coming into their possession.