How much a CPA costs for a small business runs roughly $1,500 to $10,000 a year, driven by how many returns your structure files and how clean your books arrive. Ignition’s 2025 benchmark puts a business return at $1,000 to $1,499 a year and monthly bookkeeping at $250 to $499. Indinero bundles bookkeeping, tax, and CFO advisory into one fixed monthly fee rather than an hourly meter, and pricing starts at $750/mo.