Although outsourced bookkeepers tend to charge less than in-house bookkeepers, the actual amount can vary. Remember, you are not paying for benefits, nor providing a physical space for an outsourced bookkeeper, so this saves some money. On average, a business can expect to pay anywhere from $250 to $2,500 a month to outsource their bookkeeping needs, depending on the number of transactions and accounts, and the intricacy of the transactions.