Overview
Acorn 9 delivers AI-assisted tax, bookkeeping and company compliance for US businesses.
What Acorn 9 does
Acorn 9 handles US company formation, bookkeeping and tax compliance for founders and business owners. Its work includes LLC and C-corporation setup, EIN applications, registered-agent administration, annual reports and federal and state tax returns. Non-US founders and owners with multiple entities are part of its stated client base.
The recurring accounting service covers cloud-ledger setup, bank and card reconciliation, monthly close, accruals, deferred revenue and 1099 preparation. Reporting can include profit and loss, balance sheets, runway forecasts and board or KPI packs. Sales-tax work connects nexus monitoring and state registrations with recurring returns; payroll-tax work covers quarterly filings and year-end documents.
Clients connect existing records from accounting, banking and commerce systems. AI supports preparation, categorization and reconciliation; licensed CPAs review and sign tax returns. Standard single-entity work can be purchased as a bundle or separately, while heavier cross-border and multi-state matters are scoped through consultation.
Differentiation
A coordinated finance service
Formation, books and tax filings sit in one delivery relationship, with the same financial records feeding recurring reports and year-end work.
Accountant responsibility
AI prepares and processes records, while CPAs review and sign returns. Clients engage Acorn 9 to carry out the accounting work rather than staffing a bookkeeping application themselves.
Pricing
Published service fees in USD for standard cases. State and third-party costs are additional; complex cases are quoted separately.
- Starter
- $349 / year
- Formation, EIN, bank-account guidance, business address and registered-agent service.
- Tax & Compliance
- $1,999 / year
- Starter plus formation documents, annual compliance and one CPA-signed annual tax return.
- Full Business-in-a-Box
- $3,999 / year
- Adds standard managed bookkeeping, financial statements and quarterly estimated taxes.
- Standalone bookkeeping
- From $189 / month
- Up to $25,000 in monthly expenses; higher published tiers are $249 and $349 per month.
- Standalone tax return
- $1,500 / return
- Federal and state return, prepared and signed by a CPA.
- Sales tax
- $150 / month
- Nexus monitoring, registration and recurring filings.
- Payroll tax
- $350 / quarter
- Quarterly federal and state payroll filings.





