S Corp Separately Stated Items: Schedule K-1, Basis, and QBI

S corp separately stated items are the specific pieces of income, loss, deduction, and credit that an S corporation must report to each shareholder on its own line of Schedule K-1, rather than folding them into ordinary business income. The rule is set by IRC Section 1366(a)(1): if reporting an item separately could change the tax owed by any shareholder, the corporation has to break it out.¹ Everything else gets combined into a single figure called nonseparately computed income or loss, more commonly called ordinary business income.

Why the Rule Exists

Different shareholders face different limitations, rates, and phase-outs on the same type of income. If the corporation bundled a long-term capital gain into ordinary income, shareholders would lose the preferential capital gains rate and the ability to net the gain against personal capital losses. Bundle a charitable contribution into ordinary income, and it bypasses the AGI-based limits that apply on the shareholder’s Form 1040. Separate statement keeps that information intact.

Section 1366(b) reinforces this with the character rule: each item’s tax character is determined as if the shareholder had earned or incurred it directly from the original source.² A long-term capital gain at the corporation stays a long-term capital gain on the shareholder’s return. A charitable contribution stays a charitable contribution. The corporation locks in the character; the shareholder applies the limits.

Income Items That Must Be Stated Separately

Capital Gains, Losses, and Section 1231 Property

Capital gains and losses are split into short-term and long-term components based on the corporation’s holding period. Shareholders combine those figures with their personal capital transactions on Schedule D of Form 1040, and that netting determines whether they have a gain taxed at preferential rates or a loss subject to the $3,000 annual deduction cap.³

Section 1231 property, generally depreciable business assets and real property held for more than one year, follows its own path. When net Section 1231 gains exceed losses for the year, the net is treated as long-term capital gain. When losses exceed gains, the net is ordinary, which is more favorable because ordinary losses escape the capital loss cap.⁴ Depreciation recapture rides on its own line because that portion is ordinary income regardless of the overall calculation.

Portfolio Income

Interest, dividends, royalties, and annuities from the corporation’s investments are reported separately. A common point of confusion: portfolio income is not passive income. The Section 469 rules specifically exclude portfolio income from passive treatment, which means passive losses generally cannot offset it.⁵ Qualified dividends get their own line so shareholders can apply the lower qualified dividend rates.

Rental Real Estate Income and Loss

Net rental real estate income or loss gets its own line because rental activity is generally passive regardless of hours spent managing the property. Passive losses can only offset passive income, with one exception: shareholders who actively participate in rental real estate can deduct up to $25,000 of rental losses against nonpassive income, and that allowance phases out as modified AGI moves from $100,000 to $150,000.⁵ None of that math works if rental results are buried in ordinary income.

Deductions That Must Be Stated Separately

Section 179 Expense

Section 179 allows immediate expensing of qualifying property placed in service during the year.⁶ For 2026, the maximum deduction is $2,560,000, phasing out dollar-for-dollar when qualifying property placed in service exceeds $4,090,000.⁷

The corporation reports the amount it elected to expense, but the shareholder faces a separate cap: the deduction cannot exceed the shareholder’s taxable income from all active trades or businesses. A shareholder with limited business income might not absorb the full amount; the unused portion carries forward until they have enough income. That entity-then-shareholder limitation is exactly why the expense cannot be netted against corporate revenue.

Charitable Contributions

Corporate donations do not reduce ordinary business income. They flow through and are deducted on each shareholder’s return subject to AGI-based percentage limits. Cash contributions to public charities, for instance, are generally limited to 60% of the shareholder’s AGI. Without separate statement, the contribution would sidestep the shareholder’s personal limits.

Investment Interest Expense

Investment interest expense from the K-1 is deductible only up to the shareholder’s net investment income, calculated on Form 4952, with any excess carrying forward.⁸ A shareholder with $2,000 of investment interest but $800 of net investment income deducts $800 now. The limitation is entirely personal, so the corporation has to hand over the raw number.

Foreign Taxes Paid

Foreign income taxes paid by the corporation are stated separately because each shareholder chooses whether to claim them as a deduction or a foreign tax credit. The credit is usually more valuable, but it carries its own limit based on the ratio of foreign-source income to worldwide income, and that calculation happens on the shareholder’s return.

Credits, Tax-Exempt Income, and Nondeductible Expenses

Tax credits pass through as separately stated items, including the research and development credit, the low-income housing credit, and the work opportunity credit.⁹ Credits reduce tax dollar-for-dollar, and each has its own eligibility rules. The corporation calculates the amount; the shareholder decides whether it can actually be used.

Tax-exempt income, most commonly municipal bond interest, does not appear on the shareholder’s taxable income but still matters because it increases stock basis. The statute explicitly includes tax-exempt income among the items that pass through separately.¹

Nondeductible expenses are the mirror image. Fines, penalties, and the 50% nondeductible portion of meals reduce stock basis without producing a deduction. If they were invisible, shareholders would overstate basis, either claiming excess loss deductions or understating gain on a future stock sale.

A Special Case: Health Insurance for 2% Shareholders

This trips up a lot of S corporation owners. If the corporation pays health or accident insurance premiums for a shareholder who owns more than 2% of the stock, the premiums must be included in the shareholder’s W-2 wages in Box 1. They are not subject to Social Security or Medicare taxes, provided the plan covers a class of employees rather than just the owner.¹⁰

The shareholder then takes an above-the-line deduction for the premiums on Form 1040, reducing AGI regardless of whether they itemize. Getting either side wrong, either omitting the premiums from the W-2 or missing the above-the-line deduction, means overpaying FICA or leaving a deduction on the table.¹⁰

Where Each Item Appears on Schedule K-1

The S corporation files Form 1120-S as its annual return, summarizing entity-level results on Schedule K. Each shareholder receives a Schedule K-1 showing their pro rata share.¹¹ Each separately stated item lands on a specific line:

Box 1: Ordinary business income or loss (the nonseparately computed amount)
Box 2: Net rental real estate income or loss
Boxes 4–6: Interest income, ordinary and qualified dividends, and royalties
Boxes 7–8: Short-term and long-term capital gains or losses, including collectibles gains and unrecaptured Section 1250 gain
Box 9: Net Section 1231 gain or loss
Box 11: Section 179 deduction
Box 12: Other deductions, including charitable contributions and investment interest expense
Box 13: Credits, including the research credit, low-income housing credit, and work opportunity credit
Box 16: Items affecting shareholder basis, including tax-exempt income and nondeductible expenses

Shareholders use Form 7203 to track stock and debt basis year over year, feeding the K-1 data into the ordering rules.⁹ The K-1 itself is not filed with the shareholder’s return, but it should be kept with records. Basis errors compound over the years and often surface during a stock sale or corporate liquidation, long after the original mistake.

How Separately Stated Items Feed Shareholder Basis

Every separately stated item flows through the shareholder’s stock basis calculation. Basis determines how much loss the shareholder can deduct this year and whether distributions are tax-free returns of capital or taxable events.¹² The IRS requires the adjustments to be made in a specific order each year:¹³

Step 1: Increase basis for all income items, including tax-exempt income.
Step 2: Decrease basis for distributions, but not below zero.
Step 3: Decrease basis for nondeductible expenses.
Step 4: Decrease basis for deductible losses and deductions, again not below zero.

The ordering has real consequences. Because income is added before distributions come out, a shareholder can receive a distribution in the same year the corporation earns income without triggering gain, even if their beginning basis was low. Because losses come last, a shareholder might have enough basis to absorb distributions but not enough for losses. Losses that exceed basis are suspended and carry forward indefinitely until the shareholder restores basis through income or additional investment.¹³

Effect on the QBI Deduction

The Section 199A qualified business income deduction allows eligible taxpayers to deduct up to 20% of qualified business income from pass-through entities. Not every dollar on the K-1 counts as QBI, though. Capital gains and losses, certain dividends, and investment income are excluded from the QBI calculation.¹⁴

Separate statement is what makes that exclusion workable. Because capital gains, dividends, and investment income sit on their own lines, the shareholder can strip them out when running the 199A math. If those amounts were mixed into ordinary business income, the QBI figure would be inflated, producing an incorrect deduction and potential penalties on audit.

1
Office of the Law Revision Counsel. 26 USC 1366 – Pass-Thru of Items to Shareholders
2
Office of the Law Revision Counsel. 26 USC 1366 – Pass-Thru of Items to Shareholders
3
Internal Revenue Service. Schedule D (Form 1040) – Capital Gains and Losses
4
Office of the Law Revision Counsel. 26 USC 1231 – Property Used in the Trade or Business and Involuntary Conversions
5
Office of the Law Revision Counsel. 26 USC 469 – Passive Activity Losses and Credits Limited
6
Internal Revenue Service. Depreciation Expense Helps Business Owners Keep More Money
7
Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026
8
Internal Revenue Service. Form 4952 – Investment Interest Expense Deduction
9
Internal Revenue Service. 2025 Shareholders Instructions for Schedule K-1 (Form 1120-S)
10
Internal Revenue Service. S Corporation Compensation and Medical Insurance Issues
11
Internal Revenue Service. About Form 1120-S, U.S. Income Tax Return for an S Corporation
12
Internal Revenue Service. S Corporation Stock and Debt Basis
13
Internal Revenue Service. Instructions for Form 7203
14
Internal Revenue Service. Qualified Business Income Deduction