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Retained Earnings Tax Explained: How the Accumulated Earnings Tax Works for C Corporations
Your C corporation is profitable. The bank balance keeps growing. Then a question hits: can the IRS tax that cash pile?
In the United States, sometimes it can. The retained earnings tax, formally the accumulated earnings tax (AET), is a 20% penalty on earnings a C corporation stacks up beyond the reasonable needs of its business. It lands on top of your regular corporate income tax. Most owners never hear about it until an IRS examiner brings it up.
This guide covers how the tax works, who it hits, how the IRS decides, and how to protect your company. It covers the US federal rule only. Other countries run different regimes under similar names.
Quick answer
- Rate: 20% of accumulated taxable income, under IRC §531.
- Who it applies to: every C corporation, plus any LLC that elected to be taxed as one.
- Built-in credit: $250,000, or $150,000 for certain personal service corporations. You can keep more if you can show reasonable business needs.
- Who raises it: the IRS, during an exam. You don’t report it yourself.
- Your main defense: specific, documented plans for the cash. The IRS looks at the facts, not a single dollar line.
What Are Retained Earnings (And Why They Aren't Taxed By Themselves)
Retained earnings are the profit your corporation keeps instead of paying out as dividends. You find them in the equity section of your balance sheet.
The formula is simple:
Ending retained earnings = Beginning retained earning + Net income – Dividends paid
Say your company starts the year with $400,000 retained, earns $150,000 after tax, and pays $50,000 in dividends. You end the year with $500,000.
That money has already been through corporate tax at the 21% federal rate. Holding it isn’t a tax event. The problem starts when you hold far more than the business needs, and the IRS decides you’re doing it to shield your shareholders from dividend tax.
What Is The Retained Earnings Tax (Accumulated Earnings Tax)?
The accumulated earnings tax is a 20% tax on a corporation’s accumulated taxable income. IRC §531 imposes it, and it stacks on top of regular corporate income tax.
Here’s why it exists. A C corporation pays tax on its profit. Shareholders then pay a second tax when that profit comes out as dividends. If the company never pays dividends, the second layer never happens. Congress wrote the AET to discourage exactly that.
Three things to know:
- The rate is 20%. Older articles show 15%. That was the rate before the 2012 law change, and it’s out of date.
- You don’t self-report it. The IRS raises it during an examination.
- It isn’t a tax on holding cash. It targets cash you hold beyond the reasonable needs of the business, as the rest of this guide explains.
Who Has To Worry About The Retained Earnings Tax?
If you run a C corporation, you should understand the accumulated earnings tax (AET). Since tax years beginning after July 18, 1984, the AET rules can apply to every C corporation, regardless of how many shareholders it has.
| Entity Type | Exposed to the AET? | Why |
|---|---|---|
| C corporation | Yes, potentially | The tax can apply to every C corporation that accumulates earnings to avoid shareholder income tax. |
| Personal service C corporation | Yes, potentially | Same general rule, but the minimum accumulated earnings credit is $150,000 instead of $250,000. |
| LLC taxed as a C corporation | Yes, potentially | The tax follows the federal tax classification, not the legal name. |
| S corporation | Generally no | Profit generally passes through to shareholders. |
| Partnership or LLC taxed as one | Generally no | Same general pass-through tax treatment. |
| Holding or investment company | Yes, potentially; presumed tax-avoidance purpose | A corporation that is merely a holding or investment company is presumed to accumulate earnings to avoid shareholder tax unless it proves otherwise. |
| Personal holding company | Exempt from the AET | Section 532(b) exempts qualifying personal holding companies, but they face a separate tax. |
| Tax-exempt corporation or passive foreign investment company | Exempt from the AET | Also exempt under Section 532(b), subject to the applicable statutory requirements. |
How The IRS Decides: The "Reasonable Needs" Test
The fight over the retained earnings tax almost always comes down to one question: did you keep this cash for a real business reason?
The Legal Test
Under §532, the tax applies when a corporation is formed or used to help shareholders avoid income tax by letting earnings pile up instead of paying them out. Avoidance only has to be one purpose, not the main one. The Supreme Court said so in United States v. Donruss Co. (1969).
Then §533 tilts the field. If you accumulate beyond the reasonable needs of the business, the law treats that as proof of the avoidance purpose unless you prove otherwise by a preponderance of the evidence. That puts the burden on you.
What Counts as a Reasonable Need
Section 537 covers the reasonably anticipated needs of the business, plus certain stock redemption needs. The regulations recognize needs like these:
- Business expansion
- Acquiring another business
- Retiring debt
- Working capital
- Loans to customers
- Product liability loss reserves
The plan has to be specific, definite and feasible (Treas. Reg. §1.537-1). “We might expand someday” fails. In Snow Mfg. Co. v. Commissioner, vague expansion talk didn’t hold up.
What Passes and What Fails
- Passes: a manufacturer with a board-approved budget, a signed equipment quote, and a purchase date next year.
- Fails: a company with $900,000 in the bank, no dividends in ten years, and no written plan for the cash.
- Fails: a company that moves its surplus into unrelated stocks or real estate.
On that last point, the Supreme Court held in Ivan Allen Co. v. United States (1975) that marketable securities count at net realiza ble value, not cost, when the IRS measures your liquid assets.
What Raises Audit Risk
Examiners weigh the facts. These factors draw attention:
- Wealthy shareholders who gain little from taking dividends
- Shareholder-managers who understand the tax rules
- A history of paying no dividends
- Investments unrelated to the business
- Funds left unused long after year-end
No single dollar amount triggers the tax. The IRS looks at the facts.
How The Retained Earnings Tax Is Calculated (Worked Example)
Here's the point most articles get wrong: the IRS doesn't tax your whole retained earnings balance. It taxes accumulated taxable income for the year. Section 535 sets the formula:
Accumulated taxable income = Adjusted taxable income - Dividends-paid deduction - Accumulated earnings credit
The adjustments in §535(b) change your regular taxable income. For example, charitable contributions get allowed without the usual limit, and net operating loss deductions get disallowed.
Here's a simplified example. Real returns have more adjustments.
| Line | Amount |
|---|---|
| Adjusted taxable income | $500,000 |
| Less: dividends-paid deduction | ($100,000) |
| Less: accumulated earnings credit (earnings kept for reasonable needs) | ($300,000) |
| Accumulated taxable income | $100,000 |
| AET at 20% | $20,000 |
The $250,000 Credit Isn't a Flat Safe Zone
Most corporations get a minimum accumulated earnings credit of $250,000. Certain personal service corporations get $150,000. Those fields include health, law, engineering, architecture, accounting, actuarial science, performing arts and consulting.
But the minimum credit shrinks by the earnings and profits you already built up by the end of the prior year. So “you can safely keep $250,000” is a simplification. A company with more than the credit can still be safe if it shows reasonable needs for the excess.
The Bardahl formula in plain English
The Bardahl formula is your best defense for the working-capital part of reasonable needs. It comes from Bardahl Manufacturing Corp., T.C. Memo 1965-200. The idea: you can keep enough cash to run the business through one full operating cycle.
An operating cycle is the time between buying inventory and collecting cash from the sale. The formula works in three steps:
- Add your inventory cycle (days to sell inventory) and your receivables cycle (days to collect).
- Subtract your payables cycle (days you take to pay suppliers).
- Divide the result by 365, then multiply by your annual operating costs.
Mini example. Say your inventory cycle is 60 days, you collect in 45 days, and you pay suppliers in 30 days. Your operating cycle is 60 + 45 − 30 = 75 days. With $1.2 million in annual operating costs:
Copy this code: \frac{75}{365} \times \$1{,}200{,}000 \approx \$246{,}600
So roughly $246,600 of working capital is defensible for that company. This is a simplified illustration. A real calculation uses your own cost figures and cycle data.
Other accepted approaches exist, such as one year of operating costs or industry benchmarks. Courts have used them, but Bardahl is the most common starting point.
How To Avoid The Retained Earnings Tax (Or Cut It Down)
have real options. Each one has a trade-off, so pick with your tax pro, not on instinct.
1. Document your reasonable needs
This is the cheapest fix and the strongest. Put your plans in writing before year-end: board minutes, budgets, expansion plans, equipment quotes and debt schedules. The checklist below shows what to gather.
Trade-off: it only works if you follow through on the plans.
2. Pay dividends
Dividends you pay reduce accumulated taxable income, so they cut the base for the AET. But your shareholders owe tax on them.
Here’s a simplified comparison for a shareholder in the top bracket, who can owe up to 23.8% (a 20% dividend rate plus the 3.8% net investment income tax). A $100,000 dividend costs that shareholder about $23,800. Leaving the same $100,000 as accumulated taxable income costs the corporation $20,000 in AET. And the shareholder tax is still waiting for you later, because holding the cash only defers it.
Trade-off: the AET isn’t always the bigger bill, so run the numbers for your owners’ brackets.
3. Pay deductible compensation and bonuses
Reasonable salaries and bonuses reduce taxable income.
Trade-off: the IRS limits compensation to what’s reasonable for the work, and payroll taxes apply.
4. Reinvest in the business
Deductible expenses and qualifying capital spending put cash to work and support your reasonable-needs case.
Trade-off: you’re spending money to save tax, so only buy what the business needs.
5. Consider consent dividends
With a consent dividend, shareholders agree to be taxed as if they received a dividend, and the corporation gets a dividends-paid deduction, while the cash stays in the company.
Trade-off: shareholders owe tax on money they never received. Talk to a tax pro before you try this.
6. Evaluate an S corporation election
S corporations generally don’t face the AET. But an S election has caveats: your company must be eligible, you may owe built-in gains tax on appreciated assets, and the timing rules matter.
7. Don’t park cash in unrelated passive investments
Stocks, bonds and real estate that have nothing to do with your business look like avoidance to an examiner. If you invest surplus cash, document the business reason. Trade-off: there’s no upside to ignoring this one. It’s what auditors look for.
Documentation Checklist: Proving Your Reasonable Needs
If the IRS asks why you kept the cash, paper wins. Gather these before year-end, and update them every year.
- ☐ Board minutes that record each reason for keeping cash, dated before year-end
- ☐ A written budget and forecast for the next 12 to 24 months
- ☐ Expansion plans with sites, lease quotes, hiring plans and timelines
- ☐ Equipment quotes, contracts and purchase orders
- ☐ A debt schedule with maturity dates and a payoff plan
- ☐ A working capital calculation (Bardahl) backed by receivables, payables and inventory data
- ☐ Acquisition term sheets, letters of intent and valuation work
- ☐ Product liability or other reserve analysis, if you carry one
- ☐ Your dividend history and policy, with the reasons behind them
- ☐ A record of how and when you spent the retained funds, compared with the plan
- ☐ A list of investments, with the business reason for each
- ☐ Support for officer compensation
What To Do If The IRS Raises The Retained Earnings Tax
Don’t panic, and don’t wait. The clock starts the day the notice goes out.
- You get a §534(b) notification. The IRS tells you the proposed deficiency includes the AET.
- You file a §534(c) statement. It lays out the grounds and facts showing your reasonable needs. You generally have 60 days from the mailing date. The IRS can grant up to 30 more days for good cause.
- The burden of proof can shift. A sufficient statement puts the burden on the IRS for the issues it raises in Tax Court. It doesn’t cover the holding or investment company presumption.
- You can take it to Tax Court. That’s the path after the IRS issues a notice of deficiency.
This is specialist work. A weak §534(c) statement can cost you the burden shift, so bring in an Enrolled Agent (EA) or tax attorney early. An EA has unlimited rights to represent you before the IRS.
Have an IRS notice? Don’t ignore it. Talk to us first.
Retained Earnings Tax Vs Personal Holding Company Tax Vs Corporate Income Tax
These three get mixed up all the time. They're separate taxes. A corporation doesn't owe both the AET and the personal holding company tax.
| Comparison | Retained Earnings Tax (AET) | Personal Holding Company Tax | Corporate Income Tax |
|---|---|---|---|
| Rate | 20% | 20% | 21% flat |
| Who it hits | C corps that accumulate earnings beyond reasonable business needs to avoid shareholder income tax | Closely held corporations with mostly passive income that meet the PHC tests | C corporations subject to federal corporate income tax |
| What it targets | Earnings accumulated to avoid shareholder dividend tax | Undistributed personal holding company income | Regular taxable corporate profit |
| How it arises | Generally determined by the IRS through examination | Calculated and reported using Schedule PH | Reported on the corporation's federal income tax return |
| Stacks on regular tax? | Yes | Yes | It's the base tax |
Get an accumulated earnings review before year-end
A growing cash balance isn’t a problem. An undocumented one is. You can manage this tax with a clear plan for your cash, a paper trail that backs it up, and a dividend strategy that fits your owners.
Black Ink Tax and Accounting Services can review your balance sheet, test your reasonable needs, and build the documentation file before year-end. We handle Business Tax Preparation Services and Taxation Services all year, not just in tax season.
This article is general information, not tax advice. Your facts decide whether the accumulated earnings tax applies. Talk to our qualified tax professional before you act.
Need Help With Retained Earnings Tax?
Not sure how retained earnings affect your business taxes? Talk to us before you file. Black Ink Tax & Accounting Services has served NYC since 2000, and our Enrolled Agent-led team helps business owners understand retained earnings, corporate tax obligations, and potential accumulated earnings tax issues. Whether you’re planning to reinvest profits or distribute earnings, our tax professionals can help you make informed decisions and stay compliant with IRS regulations.
No. Corporate income tax, 21% at the federal level, hits your profit every year. The retained earnings tax is an extra 20% penalty on accumulated taxable income, for cash you pile up beyond reasonable business needs. You can owe both in the same year.
The rate is 20% of accumulated taxable income under IRC §531. Older sources list 15%, which was the rate before the 2012 law change. The tax stacks on top of your regular corporate income tax, so it raises your total bill.
Most C corps get a $250,000 accumulated earnings credit, or $150,000 for certain personal service corporations. The credit can shrink based on earnings you already hold. You can keep more with documented, specific plans. The IRS looks at the facts, not one number.
Generally no. S corporations and partnerships pass profit through to their owners. But an LLC that elected to be taxed as a C corporation can owe it. Check how your entity is taxed before you assume you're exempt.
No. You don't calculate or report it on your return. The IRS raises it during an examination and sends a notice with the proposed deficiency. That's why your paper trail should exist before any exam begins.
Expansion, buying another business, paying off debt, working capital, loans to customers and product liability reserves can all qualify. Your plans must be specific, definite and feasible. A written budget and signed quotes help. Vague intentions don't pass.
Yes. File a §534(c) statement, generally within 60 days of the IRS notice, showing your reasonable needs. A sufficient statement can shift the burden of proof to the IRS. If you still disagree, you can take the case to Tax Court after a notice of deficiency.
No. It only defers the shareholder-level tax. Shareholders owe tax later, when the company pays dividends, redeems stock or liquidates, or when they sell their shares. Holding too much cash can also trigger the AET along the way.
The personal holding company tax targets closely held corporations with mostly passive income, like dividends, interest and rents. The retained earnings tax targets any C corp that accumulates beyond reasonable needs. They're separate taxes, and one corporation doesn't owe both.