S corporation distributions and shareholder basis

Whether an S corporation distribution is taxable, and whether a shareholder can actually deduct a loss the corporation passes to them, both turn on a single figure: the shareholder's basis. Because an S corporation's income is taxed to shareholders as it arises rather than when it is paid out, the rules on distributions and basis are really about avoiding taxing the same income twice — and about limiting deductions to what the shareholder has genuinely put at stake. This guide explains how basis works and how distributions interact with it.

What basis is

A shareholder's stock basis is their investment in the S corporation for tax purposes, and it moves every year. Broadly it starts with what the shareholder paid for their stock (or contributed), increases by their share of the corporation's income items, and decreases by their share of losses and deductions and by distributions received. Because the figure changes annually and the corporation does not compute it for the shareholder, tracking it is the shareholder's own responsibility — reported on the basis form that accompanies the shareholder's return. A shareholder who never tracked basis often has to reconstruct years of K-1s from Form 1120-S to work out where they stand.

How distributions are taxed

The general rule for an S corporation that has never been a C corporation (so has no accumulated earnings from a C period) is favourable: a distribution is tax-free to the extent of the shareholder's stock basis. That is because the underlying income was already taxed when it passed through on the K-1, so paying it out is simply a return of already-taxed money. The distribution reduces the shareholder's basis. Only when a distribution exceeds the shareholder's basis is there tax: the excess is generally treated as capital gain. So the taxable event is not the distribution as such, but a distribution larger than the basis available to absorb it.

Basis limits losses

Basis does more than shelter distributions — it also caps deductible losses. A shareholder can deduct S corporation losses and deductions passed to them only to the extent of their stock basis plus basis in any direct loans they made to the corporation. A loss beyond that combined basis is not lost, but it is suspended and carried forward, becoming deductible in a later year when the shareholder has restored enough basis (through further income or contributions). This is why a loss year combined with a low basis needs care: the loss on the K-1 may not all be deductible now. It also interacts with paying owners correctly — see reasonable compensation — because salary and distributions both affect the cash and the basis position.

The accumulated adjustments account

For an S corporation that was previously a C corporation, a further layer applies. The accumulated adjustments account (AAA) tracks the corporation's cumulative post-election income that has been taxed to shareholders but not yet distributed. Distributions are generally treated as coming first out of AAA (tax-free to the extent of basis), and only then out of any accumulated earnings and profits from the C corporation period — which are taxed as a dividend. This ordering matters only where there are old C corporation earnings; a corporation that has always been an S corporation is in the simpler position described above. The contrast with a C corporation's dividend treatment is drawn out in Form 1120 versus 1120-S. The practical takeaway across all of this is the same: keep basis current every year, because it is the number that decides the tax on both distributions and losses.

Sources

This guide is written against the official and clearly labelled professional references below. Rates, thresholds and portal procedures change between reviews, so open the primary source before relying on a figure.

• S corporation stock and debt basis (IRS)
• S Corporation compensation and medical insurance issues (IRS)

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