The price of a recruiting billboard advertisement can vary greatly. At this writing, classic billboards can cost as little as $250 a month for lower-trafficked and rural areas, or as much as $14,000 a month in urban areas. Digital billboards get a little more complicated because the cadence that the ad shows can be adjusted. Digital billboards are still usually more expensive, ranging from around $1,500 a month up to $15,000 a month.