QSBS Section 1202: Exclude Up to 100% of Gain on C Corp Stock

Section 1202 is the federal rule that lets an individual shareholder keep part of an exit gain out of taxable income entirely. The Schedule D instructions state the mechanic directly: "Section 1202 allows you to exclude a portion of the eligible gain on the sale or exchange of QSB stock."^[1] The same passage limits the benefit to shares "held for more than 5 years".^[1]

That sentence hides four independent tests: the right kind of issuer, the right way of acquiring the shares, a gross asset ceiling met at issuance, and a long enough hold. Failing any one costs the whole exclusion, which is why founders and early employees at technology and SaaS startups are better off running the analysis at incorporation than at the closing table.

For shares issued on or before July 4, 2025, the exclusion percentage is set by the date you acquired the stock, not by how far past the minimum you held it. The instructions split the timeline into three windows and cap the exclusion at 50%, 75%, or 100% of qualified gain.^[2]

A fourth rate sits outside that sequence. Empowerment zone business stock can reach a 60% exclusion, but only for gain attributable to periods on or before December 31, 2018, and the instructions state the 60% rate stops there.^[2] Because P.L. 119-21 amended section 1202 on July 4, 2025, read the ladder below as the instructions state it for those earlier issuances.^[10]

The change the IRS has already written into its filing guidance is the size of company that can issue qualifying stock. The IRS investment income publication records the enactment: tax reform was "enacted in P.L. 119-21, commonly known as the One Big Beautiful Bill Act, on July 4, 2025".^[10] The Schedule D instructions now define a qualified small business as a domestic C corporation with total gross assets of $75 million or less, and hold the earlier $50 million figure in place for stock issued on or before July 4, 2025.^[3]

That is a 50% lift in the ceiling, and it bites at the financing table: a company that once had to close its round before crossing the old limit now has room for another qualifying tranche. The measurement is not a single snapshot either. Gross assets are tested at all times after August 9, 1993 and before the stock is issued, and again immediately after issuance, with any predecessor and every member of a parent-subsidiary controlled group counted as one.^[3] Sequencing a raise around that test is a tax planning question, not a year-end filing question.

Yes, and this is where the published guidance and the amended statute have not caught up with each other. P.L. 119-21 amended section 1202 on July 4, 2025.^[10] The Schedule D instructions carry the new $75 million ceiling and the July 4, 2025 dividing line,^[3] while the IRS investment income publication still describes the per-issuer dollar limit as it stood for 2022.^[9]

Practically, treat July 4, 2025 as a hard boundary. If your shares were issued on or before that date, the acquisition-date ladder and the holding-period language in the instructions describe your position. If they were issued after it, do not lift a holding period, an exclusion percentage, or a per-issuer dollar cap out of guidance written for the earlier regime without confirming that the amended section 1202 says the same thing.

Only a domestic C corporation. The instructions require the shares to be stock in a C corporation rather than S corporation stock, to have been originally issued after August 10, 1993, and to come from a company that met the qualified small business definition as of the issuance date.^[3]

Several entity types are ruled out by name. Through substantially all of your holding period the company cannot have been a foreign corporation, a cooperative, a real estate investment trust, a REMIC, a FASIT, a regulated investment company, a current or former DISC, or a corporation that made a section 936 election.^[4] One carve-out runs the other way: a specialized small business investment company is treated as having met the active business test.^[4] If the entity choice is still open, the LLC, S-Corp, and C-Corp comparison walks the trade-offs.

The corporation must have used at least 80% of the value of its assets in the active conduct of one or more qualified businesses through substantially all of your holding period.^[4] That 80% test is usually the easy half for an operating software or hardware company. The definition of a qualified business is where deals actually fail, because the instructions define it by exclusion: whole fields simply cannot produce qualifying stock, no matter how small or how profitable the company is.^[5]

At original issue, from the corporation itself. The instructions require you to have acquired the stock "at its original issue", either directly or through an underwriter, in exchange for money or other property that is not stock, or as pay for services other than underwriting.^[3]

That rules out most secondary purchases. Buying founder shares from a departing co-founder in a private sale does not create QSB stock in your hands, however small the company is. The instructions do let the test carry over in limited cases, including stock received from another person who met it, such as by gift or inheritance, and stock taken through a conversion or exchange of QSB stock you already held.^[3]

By the first day you held the stock, after the holding-period tacking rules of section 1223 are applied. The instructions make that the controlling date when deciding whether your exclusion tops out at 50%, 75%, or 100% of the QSB stock gain.^[6]

For a founder who took shares at incorporation, the date is usually obvious. It gets harder for an early employee whose restricted stock vested in tranches, for an investor who took shares as pay for services, and for anyone who swapped one block of QSB stock for another in a reorganization. Each of those runs through section 1223 before the acquisition date is settled, and that date decides which rung of the ladder the gain lands on.

There is a ceiling for each issuing company, and it is generous rather than unlimited. The IRS investment income publication frames it as the greater of two amounts: ten times your basis in all of that issuer's qualified stock you sold or exchanged during the year, or a flat dollar limit reduced by gain from the same issuer you already used in earlier years.^[9]

The flat limit that publication states is $10 million, or $5 million for married individuals filing separately, and its own text ties that figure to 2022.^[9] Since P.L. 119-21 amended section 1202 on July 4, 2025,^[10] a holder of stock issued after that date should not plan around the published number without checking the amended statute. The ten-times-basis alternative also matters more than founders expect: a large cash investment at issuance lifts the ceiling well above any flat dollar cap, which is why the price paid at original issue is worth documenting from day one.

The sale is reported as an ordinary long-term disposition first, and the exclusion is then backed out on the same form. Report it on Form 8949, Part II with the correct box checked, put Q in column (f), and show the excluded gain as a negative number in column (g).^[7]

The rate on whatever gain is left is the part people miss. If you are completing line 18 of Schedule D, the allowable exclusion goes on line 2 of the 28% Rate Gain Worksheet: two thirds of it where you excluded 60% of the gain, one third where you excluded 75%, and no entry at all where you excluded 100%.^[7] Gain the exclusion does not reach therefore runs through the 28% bucket rather than the ordinary long-term capital gain rates, which is why a partial exclusion is worth less than founders assume. Getting those entries right sits alongside business tax return preparation for the corporation itself.

There is a rollover. If you sold QSB stock you had held for more than 6 months, you can elect to postpone the gain by buying replacement QSB stock inside the 60-day period that began on the date of the sale.^[8]

That election is a bridge, not a cure. It defers the gain into the replacement shares by reducing their basis, so the whole eligibility analysis restarts against the new issuer, with its own gross asset test at issuance and its own clock. It is also a deadline that expires quietly, 60 days from the sale. Anyone selling into a partial liquidity event should model the rollover before signing, which is exactly what advisory solutions are for.

Section 1202 is the exit side of the story. The operating side is what the same law did to the corporation's own deductions while it is still building, which we cover in the R&D expensing explainer.

Modeled together, the two sides pull the same way: lighter cash taxes through the build, cleaner gain math at the exit. Sequencing still matters. A gross asset ceiling tested at issuance^[3] means capital raised, equipment bought, and balances carried in the years before a round all feed the number that decides whether the next tranche of stock qualifies at all.