Retained earnings that sit inside a U.S. corporation can trigger a little‑known “Accumulated Earnings Tax” (AET). The tax is designed to prevent companies from indefinitely deferring personal income by keeping profits in the business instead of distributing them as dividends.
What the tax is and when it applies
- Scope – AET applies only to C‑corporations (including foreign‑owned subsidiaries that file a U.S. return).
- Rate – The tax is imposed at the federal long‑term capital‑gains rate, currently 20 % for taxpayers in the highest income bracket.
- Threshold – The IRS generally looks at retained earnings that exceed $250,000. Below that amount the tax is rarely assessed.
- Trigger – If the IRS determines that the retained earnings are “excessive” for the corporation’s legitimate business needs, it can assess the tax on the amount deemed unreasonable.
How the IRS judges “excessive”
The agency does not use a fixed formula; instead it evaluates whether the cash is needed for:
- Ongoing operations (payroll, rent, utilities, etc.)
- Research and development or other capital‑intensive projects
- Planned acquisitions or other strategic investments
- Legal or regulatory liabilities that require cash reserves
If a corporation can document a clear business purpose for the cash, the risk of AET is reduced. Public companies such as Berkshire Hathaway, Apple, Google, Microsoft, and Oracle typically avoid the tax because:
- Their cash holdings are tied to large, publicly disclosed acquisition programs, R&D pipelines, or other operational needs.
- Ownership is dispersed among many shareholders, making the “private individual” test less applicable.
Practical steps to mitigate AET risk
- Pay reasonable dividends – Distributing cash reduces retained earnings and demonstrates that the corporation is not hoarding profit for personal tax avoidance.
- Reinvest in the business – Use cash for legitimate expenses: hiring, equipment purchases, product development, or expansion projects.
- Document acquisition intent – If you plan to acquire other businesses, keep a written strategy, target lists, and financial models that show the need for cash reserves.
- Maintain clear accounting records –
- Separate capital expenditures from ordinary operating expenses.
- Prepare cash‑flow statements that illustrate future cash needs.
- Keep minutes or board resolutions that justify retained earnings.
- Avoid pure passive holding structures – A holding company that merely accumulates cash without active operations is more likely to attract IRS scrutiny.
- Consider layered corporate structures – Shifting cash between subsidiaries can help keep any single entity’s retained earnings below the $250 k threshold, but the overall economic substance must still be defensible.
- Plan for audits – The IRS must have a reasonable basis to assess AET, typically through an audit. Maintaining thorough documentation lowers the chance of a successful assessment.
When to start worrying
- Retained earnings above $250,000 merit a review of the business justification.
- Once retained earnings reach $1 million or more, the likelihood of IRS attention rises, and proactive planning becomes advisable.
Bottom line
AET is a “hidden” tax that can appear when a corporation accumulates cash without a demonstrable business purpose. By paying dividends, reinvesting in legitimate operations, and keeping detailed records of future cash needs—especially acquisition plans—companies can substantially reduce the risk of a 20 % tax on their retained earnings. Regular consultation with tax professionals and accountants is essential to ensure compliance and to structure corporate finances in a way that aligns with both business goals and IRS expectations.
