In Boston, paid ads agency rates typically range from $2,500-$10,000 monthly for management fees, plus your actual ad spend. This is slightly higher than the national average due to Boston's competitive market and higher cost of doing business. The city's concentration of education, healthcare, financial services, and tech companies drives up demand for specialized digital marketing expertise. Most Boston agencies use a percentage-of-ad-spend model (usually 15-20% for spends under $20,000/month, scaling down for larger budgets) or a flat monthly fee structure. When comparing costs, look beyond the price tag to expertise in your specific industry—many Boston agencies have developed specializations in the region's dominant sectors like biotech, higher education, and financial services, which can deliver better ROI despite potentially higher management fees.