The costs of due diligence may vary depending on the scope of work and cost-drivers involved. No matter how much your due diligence auditor is going to charge you for the services, performing due diligence before considering any proposal is never a bad idea because the costs of performing thorough financial due diligence far outweigh the costs of making a bad acquisition. A comprehensive due diligence performed by a qualified due diligence auditor multiplies the chances of success in a transaction.