What Is an AAA Account in S-Corp Taxation?

In S-corporation taxation, the AAA (Accumulated Adjustments Account) is a running total the corporation keeps of earnings that have already been taxed on shareholders’ personal returns but not yet paid out. It exists so that when the company later hands cash to its owners, everyone can tell which dollars were already taxed and shouldn’t be taxed again. Distributions sourced from the AAA are generally tax-free; distributions sourced from other pools of corporate money may not be.

S corporations don’t pay federal income tax at the entity level. Each year’s income passes through to the shareholders, who report it on their individual returns at rates from 10% to 37%.¹ A shareholder allocated $80,000 of S-corp income owes tax on $80,000 even if every dollar stays in the company account. The AAA is the ledger that tracks those already-taxed earnings so later distributions of that same money don’t get taxed a second time.²

One structural point worth getting straight up front: the AAA sits at the corporate level. It is not split among shareholders and does not transfer with a stock sale.³ A new shareholder buying in draws from the same AAA pool the prior owner helped build. That fact routinely surfaces during ownership changes and makes the AAA balance a real number in stock purchase negotiations.

What Raises and Lowers the AAA

The AAA grows each year with the same income items that pass through to shareholders on Schedule K-1: ordinary business income and separately stated items like interest, dividends, royalties, and capital gains.² Both add to the pool of previously taxed earnings available for later tax-free distributions.

Tax-exempt income is deliberately kept out. Municipal bond interest, certain life insurance proceeds, and similar receipts go into a separate pool called the Other Adjustments Account, discussed further below.³ Keeping them out preserves the AAA’s purpose as a ledger of income the shareholders have already paid tax on.

Losses and deductions pull the balance down. Ordinary business losses, capital losses, and separately stated deductions like Section 179 all reduce the AAA.⁴ Non-deductible expenses also reduce it, but only if they are unrelated to tax-exempt income. An IRS penalty the company can’t deduct reduces the AAA. Premiums on a company-owned life insurance policy do not, because those relate to tax-exempt income and are charged to the OAA.³

Distributions to shareholders reduce the AAA by the amount paid out, reflecting that the owner has now received earnings they were previously taxed on. If the corporation redeems stock in an exchange transaction, the AAA is reduced ratably by the portion attributable to the redeemed shares. In a year with both, ordinary distributions are applied first, then redemptions.³

How Distributions Get Taxed

Tax treatment depends on where the distribution is sourced under a strict ordering rule. For an S corporation with accumulated earnings and profits carried over from a prior C-corp existence, the sequence is:

From the AAA first, tax-free to the extent of the balance (and the shareholder’s stock basis).
Then from previously taxed income (PTI), a legacy account for pre-1983 S-corp earnings.
Then from accumulated earnings and profits, taxed as a dividend.
Anything remaining is tax-free up to the shareholder’s remaining stock basis; any excess is a capital gain.

For an S corporation that was never a C corporation and has no accumulated earnings and profits, the ordering collapses. The whole distribution reduces the shareholder’s stock basis tax-free, and any amount above basis is a capital gain.² Long-term capital gains on stock held more than a year are taxed at 0%, 15%, or 20%, depending on the shareholder’s income.⁴

When total distributions during the year exceed the year-end AAA balance, the available AAA is allocated proportionally across all distributions based on their relative sizes, not first-come, first-served.²

AAA Is Not the Same as Your Stock Basis

This is where most S-corp tax confusion lives. The AAA and a shareholder’s stock basis are two separate calculations that happen to share some of their inputs. Both increase with income and decrease with losses and distributions. They are not the same number.

The AAA is a corporate-level account shared by all shareholders.³ Stock basis is calculated separately for each shareholder and starts with what they paid for their shares. Stock basis also picks up capital contributions and reflects debt the shareholder personally lends to the corporation, none of which touch the AAA.

A distribution sourced from the AAA is only tax-free to the extent the individual shareholder has enough stock basis to absorb it. A company can carry a large AAA balance, but if a particular shareholder’s basis is low, the portion of the distribution above that shareholder’s basis is a capital gain no matter how much AAA is left. For basis, the annual order is: increase for income first, then decrease for distributions, then for non-deductible expenses, and finally for losses.⁴

When the AAA Goes Negative

The AAA can drop below zero when cumulative losses and non-deductible expenses outrun cumulative income. A run of bad years, a large write-off, or significant Section 179 deductions can all put it there.

Distributions themselves, however, cannot create or deepen a negative AAA. If the account is already at zero or below, a distribution that year skips the AAA entirely and is sourced under the remaining ordering rules, typically as a dividend if the company has accumulated earnings and profits, or otherwise as a return of capital.⁵

A related rule, the net negative adjustment rule, applies when the year’s losses and deductions exceed the year’s income. That net negative amount is set aside when measuring how much of the year’s distributions qualify as tax-free, so the AAA balance used for that test looks only at the income side. In effect, distributions during a loss year keep their tax-free character when the pre-loss balance would have covered them. The full loss still reduces the AAA at year-end for future purposes.⁵

The AAA Bypass Election

Ordinarily, distributions come out of the AAA before touching accumulated earnings and profits. An S corporation can reverse that order with a bypass election under IRC 1368(e)(3), electing to treat distributions as coming from accumulated earnings and profits first.² It covers all distributions for the year and requires the consent of every shareholder who receives a distribution that year.⁶

Why volunteer for a taxable dividend? Usually to drain the accumulated earnings and profits account and protect the S election. An S corporation with accumulated earnings and profits that earns more than 25% of its gross receipts from passive sources (rent, interest, royalties) for three straight years automatically loses S-corp status. Electing to distribute the earnings and profits first zeros out that account and removes the risk, at the cost of dividend tax in the short term. The election is made by attaching a statement to a timely filed return, including an amended return, signed by a corporate officer and every affected shareholder.

The Other Adjustments Account (OAA)

The OAA tracks tax-exempt income and the expenses tied to earning it. Municipal bond interest, tax-free life insurance proceeds, and similar items increase the OAA rather than the AAA.³ Expenses connected to that exempt income (premiums on a company-owned life insurance policy, for example) reduce the OAA.

In the distribution ordering, the OAA sits below accumulated earnings and profits. Distributions sourced from the OAA are tax-free because the underlying income was never taxed to begin with.⁷ Keeping the two accounts separate stops tax-exempt receipts from inflating the AAA and misrepresenting how much taxed income is actually available to distribute.

What Happens if the S Election Ends

When a company revokes or loses its S election, the AAA doesn’t disappear. It stays on the books, and the former S corporation gets a window to distribute those already-taxed earnings on favorable terms.

The Post-Termination Transition Period

The post-termination transition period (PTTP) generally runs from the day after the final S-corp tax year through the later of one year after that date or the extended due date of the final S-corp return.⁸ Cash distributions during this window are applied against the shareholder’s stock basis to the extent of the remaining AAA, keeping them tax-free. The distribution must be cash; property distributions don’t qualify.

If a later audit adjusts an S-corp income or deduction item, a separate 120-day PTTP opens from the date of that determination, giving shareholders another chance to withdraw the adjusted amounts tax-free.⁸

Eligible Terminated S Corporations

Companies that revoked their S election after December 21, 2017, may get a broader benefit. An eligible terminated S corporation (ETSC) can distribute its AAA balance as tax-free returns of capital even after the PTTP ends, potentially over several years. The distributions must be in cash and are sourced from the AAA in proportion to all other distributions the corporation makes that year.⁹ The ETSC provision was added by the Tax Cuts and Jobs Act and is a real planning tool for companies converting to C-corp status.

Where the AAA Shows Up on the Return

The AAA is reported on Schedule M-2 of Form 1120-S, in Column (a); the OAA is in Column (d). Line 1 is the beginning-of-year balance and Line 8 is the year-end balance after all adjustments. Ordinary income from page 1, line 22 of the 1120-S feeds Column (a) as an increase, with separately stated income, losses, deductions, non-deductible expenses, and distributions each posting to their own lines.¹⁰ When Schedule M-2 doesn’t reconcile, it usually traces back to a miscategorized distribution or a non-deductible expense charged to the wrong account, and fixing that before filing is much easier than defending it in an audit.

1
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
2
Office of the Law Revision Counsel. 26 USC 1368 – Distributions
3
eCFR. 26 CFR 1.1368-2 – Accumulated Adjustments Account (AAA)
4
Internal Revenue Service. S Corporation Stock and Debt Basis
5
eCFR. 26 CFR 1.1368-1 – Distributions by S Corporations
6
Office of the Law Revision Counsel. 26 USC 1368 – Distributions
7
Internal Revenue Service. Practice Unit SCO-T-008 – Distributions with Accumulated Earnings and Profits
8
Office of the Law Revision Counsel. 26 USC 1377 – Definitions and Special Rule
9
eCFR. 26 CFR 1.1371-1 – Distributions of Money by an Eligible Terminated S Corporation
10
Internal Revenue Service. Instructions for Form 1120-S