Stephan P. McMahon & Company (SPM&Co) is a CPA and advisory firm serving small business owners and individuals in Plymouth, MA and the Cape Cod area. The firm’s work includes accounting services, tax preparation, tax planning, bookkeeping, payroll support, and help for new business formation.

The practice also supports business-focused needs such as business valuation, cash flow management, bank financing, and planning for aspiring business owners. For individual clients, its listed services include Individual/1040 tax preparation, estates and trusts, and IRS notice and audit help.

SPM&Co describes an advisory-first approach that starts with understanding client goals, reviewing books or records, and recommending a personalized program. Its resources also reference client portal access and payroll tools including CPS iSolved and Run Powered by ADP.