Color theme

Acorn 9

AI-assisted tax, bookkeeping and company compliance for US businesses.

Visit website
Company model
Service firm
Category
Accounting, tax & audit
Acorn 9 website homepage screenshot

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.

  • Company formation
  • Registered agent
  • Bookkeeping
  • Monthly close
  • Tax returns
  • Sales-tax nexus
  • Payroll tax
  • 1099s
  • Financial reporting
  • Cross-border filings
  • Runway forecasts

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.

Explore Acorn 9

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.

Visit Acorn 9

Sources & profile notes

This profile brings together published information about Acorn 9, including its offering, company details and supporting sources. Review the original material for the full context.

Last reviewed October 21, 2026. Prices and availability may change; inclusion is not an endorsement.