In the high-stakes world of mergers and acquisitions, selling a large position in Qualified Small Business Stock (QSBS) isn’t just a payday, it’s a major reporting event. If you are the owner of a corporation changing control, or a shareholder receiving a massive distribution, Form 1099-CAP (Changes in Corporate Control and Capital Structure) is the document the IRS uses to track the movement of that wealth. In 2026, with the One Big Beautiful Bill Act (OBBBA) in full effect, the reporting thresholds and exclusion caps for QSBS have shifted, making it vital to get the paperwork right so your tax-free gains stay tax-free.
If you are navigating a corporate exit and want to ensure your 1099-CAP filings are as professional as your acquisition deal, we are ready to guide you. Contact us to schedule a strategy session today!
The Filer's Perspective: Who Must File?
A domestic corporation must file Form 1099-CAP if it undergoes an acquisition of control or a substantial change in its capital structure. For most founders, this happens during an exit where a larger entity acquires your C Corporation.
You must file if:
Breaking Down the 1099-CAP Box-by-Box
When you file Copy A with the IRS and send Copy B to your shareholders, clear and precise information is essential. Accurate numbers help your shareholders feel confident in your handling of their tax matters.
| Box | Content | Pro Tip |
|---|---|---|
| Box 1 | Date of Sale or Exchange | Use the actual trade date of the transaction. |
| Box 2 | Aggregate Amount Received | Enter the total cash plus the Fair Market Value (FMV) of any stock or property the shareholder received. |
| Box 3 | No. of Shares Exchanged | List the specific number of shares the shareholder handed over in the deal. |
| Box 4 | Classes of Stock Exchanged | Abbreviate the class (e.g., "C" for Common, "P" for Preferred). |
2026 Deadlines and Compliance
Because Form 1099-CAP is an "information return," the IRS takes the deadlines very seriously. Failure to file can result in penalties of up to $340 per form.
If you are concerned about the "10-form" e-filing mandate or need help calculating the FMV of the property in Box 2, we are ready to assist. Contact us today for a comprehensive tax review.
Frequently Asked Questions
Is Form 1099-CAP the same as Form 1099-B?
No. Form 1099-B is issued by brokers for standard stock sales. Form 1099-CAP is issued by the corporation specifically when there is a change in control or capital structure.
What if the shareholder receives only stock in the new company?
If the corporation can determine that the receipt of the new stock will not cause the shareholder to recognize a gain (a "tax-free reorganization"), then it is not required to report the FMV of that stock in Box 2.
Does the 2026 inflation adjustment apply to the QSBS cap?
Yes. Starting in 2027, the new $15 million cap will be adjusted annually for inflation. For the 2026 tax year, the cap remains a solid $15M for new stock and $10M for old stock.
Can I truncate the shareholder's SSN on Form 1099-CAP?
You can truncate the TIN on the statement you provide to the shareholder (Copy B), but you must include the full TIN on the form you file with the IRS (Copy A).
Need Help Protecting Your QSBS Exclusion?
A major QSBS exit can involve far more than reporting the sale price. The corporation must determine whether Form 1099-CAP is required, calculate the aggregate amount received, value noncash consideration, prepare shareholder statements, and meet strict information-return deadlines.
Shareholders must then connect the 1099-CAP information to Form 8949, Schedule D, the correct QSBS exclusion cap, holding-period records, adjusted basis, and any taxable portion of the gain. A mistake at either the corporate or shareholder level can create IRS notices or put a valuable exclusion at risk.
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