HPS Advisory, also presented as Hubbard Professional Services, is an accounting and advisory firm serving small businesses from O'Fallon, Illinois. The firm focuses on helping business owners organize financial work, understand cash flow, and make more informed operating decisions through bookkeeping, accounting, payroll, tax, and advisory support.

Its services include bookkeeping services, monthly accounting, payroll management, business tax preparation, tax services, and CPA accounting advisory. HPS Advisory also offers Virtual CFO support for businesses that need forecasting, budgeting, analytics, reporting structures, or strategic financial guidance without adding a full-time executive role.

Clients can work with the firm in person or remotely. The source materials describe support for tailored financial systems, reporting workflows, account reconciliation, financial statements, tax planning, and tax preparation for individuals and businesses.