Reporting a §1202 exclusion on Form 8949 — line by line

Where the §1202 exclusion lives on the form

§1202 QSBS gain is always reported as long-term (Form 8949 Part II), even for the 3-year and 4-year post-OBBBA tiers — §1202(a) treats the holding period as long-term for all tiers. The mechanics:

1. Enter the QSBS sale on Form 8949 Part II as a normal long-term sale.
2. In column (f) (Code(s) from instructions), enter Q — the §1202 exclusion adjustment code.
3. In column (g) (Amount of adjustment), enter the excluded amount as a negative number. For a 100% exclusion, this equals the entire in-cap gain. For a 75% tier, it's 75% of the in-cap gain. For a 50% tier, 50%.
4. Column (h) (Gain or loss) will compute to the unexcluded portion automatically.
5. On Schedule D Part II, line 18 routes to the 28% Rate Gain Worksheet for the §1202 rate. This is the step most practitioners miss.

Worked example 1 — 75% tier, post-OBBBA, in-cap

Founder F sold post-OBBBA QSBS (issued 2025-09-01) for $5M gain on 2029-10-01 (≈ 4.08y hold, satisfies post-OBBBA 4-year tier per P.L. 119-21 §70431(a)(2)). Cap = max($15M, 10 × $100k basis = $1M) = $15M. In-cap = $5M, over-cap = $0.

Exclusion = 75% × $5M = $3.75M excluded; unexcluded slice = $1.25M.

Form 8949 Part II entries:

• (a) Description: "QSBS — Acme Corp (§1202, 4y tier)"
• (b) Date acquired: 2025-09-01
• (c) Date sold: 2029-10-01
• (d) Proceeds: $5,100,000 (sale price)
• (e) Cost basis: $100,000
• (f) Code: Q
• (g) Adjustment: (3,750,000) — negative
• (h) Gain/loss: $1,250,000

Schedule D Part II: the $1,250,000 unexcluded gain flows to the 28% Rate Gain Worksheet on line 18. Federal tax on the §1202 slice = $1.25M × 28% = $350,000. NIIT under §1411 applies separately to the unexcluded $1.25M (3.8% × $1.25M ≈ $47,500) if F's MAGI exceeds the threshold.

Worked example 2 — pre-OBBBA 100% over-cap split

Founder G sold pre-OBBBA QSBS (issued 2019-04-01, $0 basis) for $25M gain on 2026-05-01 (≈ 7y hold, satisfies §1202(a)(4) 5-year tier). Cap = max($10M, 10 × $0 = $0) = $10M. In-cap = $10M, over-cap = $15M.

Exclusion = 100% × $10M (pre-OBBBA full exclusion) = $10M excluded; over-cap $15M gets no §1202 adjustment and runs through regular LTCG.

Form 8949 Part II — TWO separate lines:

Line 1 (in-cap §1202 slice, code Q):

• (a) "QSBS — Beta Inc. (§1202 in-cap)"
• (b) 2019-04-01 / (c) 2026-05-01
• (d) $10,000,000 / (e) $0
• (f) Code: Q
• (g) Adjustment: (10,000,000)
• (h) Gain: $0

Line 2 (over-cap LTCG slice, no §1202 code):

• (a) "QSBS — Beta Inc. (over-cap LTCG)"
• (b) 2019-04-01 / (c) 2026-05-01
• (d) $15,000,000 / (e) $0
• (f) Code: (none) / (g) Adjustment: $0
• (h) Gain: $15,000,000

Schedule D Part II: $0 from Line 1 (fully excluded) + $15M from Line 2 (over-cap, regular LTCG). The over-cap slice is taxed at 20% top LTCG + 3.8% NIIT = 23.8% × $15M = $3.57M federal. The 28% Rate Gain Worksheet captures only the in-cap §1202 portion; over-cap is regular LTCG and is NOT routed through the 28% worksheet. See the cap pillar for the in-cap vs over-cap distinction.

Worked example 3 — post-OBBBA 50% tier with 10×-basis dominant cap

Employee E sold post-OBBBA QSBS (issued 2026-01-15, $2M basis from §83(b) early exercise) for $35M gain on 2029-02-15 (≈ 3.08y hold, satisfies post-OBBBA 3-year tier per §70431(a)(1)). Cap = max($15M, 10 × $2M = $20M) = $20M. In-cap = $20M; over-cap = $15M.

50% tier: exclusion = 50% × $20M = $10M excluded; unexcluded slice = $10M (28% rate via Schedule D line 18). Over-cap $15M = regular LTCG (20% + NIIT).

Form 8949 — TWO lines (in-cap §1202 + over-cap LTCG):

• Line 1 (in-cap §1202, code Q): proceeds $22M, basis $2M, code Q, adjustment ($10M), gain $10M (this is the 28%-rate slice).
• Line 2 (over-cap LTCG, no code): proceeds $15M, basis $0, gain $15M.

Federal tax: $10M × 28% (Schedule D 28% Worksheet) = $2.8M, plus $15M × 23.8% (top LTCG + NIIT) = $3.57M. Total federal = $6.37M on the $35M gain. State conformity overlay applies on the full $35M depending on residency state.

The decoder runs this scenario at /decoder and reports per-issuance and portfolio aggregate figures.

Side-by-side: §1202 / §1045 / §1244 / over-cap LTCG

Schedule D 28% Rate Gain Worksheet flow

The Schedule D Tax Worksheet on line 18 specifically captures §1202 unexcluded gain for the 28% rate. The worksheet is in the Schedule D instructions; the §1202 portion goes on the "28% rate gain" line. Without this routing, the unexcluded slice is taxed at the standard 20% top LTCG rate — under-taxed by 8 percentage points.

The 28% rate is the §1(h)(4) rate applied via §1202(a)'s reference. Practitioners unfamiliar with §1202 frequently default to the LTCG schedule and miss the line-18 routing. The fix on audit is straightforward but produces a notice and a back-tax assessment.

Pre-OBBBA stock — 100% exclusion entry

For pre-OBBBA QSBS held 5+ years and fully excluded under §1202(a)(4), the adjustment is the entire eligible in-cap gain (negative on column g), netting column h to $0. Over-cap is reported on a separate line per the worked example 2 above. The Schedule D 28% Rate Gain Worksheet receives $0 from the §1202 slice (no unexcluded portion); the over-cap LTCG runs through regular Schedule D.

§1045 rollover entry — code R

When QSBS proceeds are rolled into replacement QSBS under §1045 within the 60-day window, the rolled portion is reported on Form 8949 Part II with adjustment code R in column (f) and the deferred amount as a negative adjustment in column (g).

A partial-rollover scenario produces TWO Form 8949 lines: one with code R for the rolled (deferred) portion, one without code (or with code Q if §1202 applies to the un-rolled slice). The §1045 election statement (per the §1045 election-statement requirements under Treas. Reg. §1.1045-1, which largely superseded Rev. Proc. 98-48 in 2007) must be attached to the return identifying the original sale, replacement purchase, and deferred-gain calculation. See the §1045 pillar for the full rollover mechanics.

§1244 ordinary loss — different form

§1244 ordinary loss does NOT go on Form 8949. It goes on Form 4797 (Sales of Business Property), Part II. The capital-loss portion of a §1244 disposition (excess of total loss over the $50k single / $100k MFJ annual cap) flows to Form 8949 Part II then Schedule D under regular capital-loss rules. See the §1244 pillar for the ordinary-vs-capital split.

Documentation to keep — full §1202 substantiation package

• Stock-purchase / subscription agreement showing issuance date and basis. Establishes the §1202(c)(1) clock-start.
• §83(b) election copy with IRS-stamped receipt if early exercise applied — establishes holding-period start at exercise rather than vesting.
• Issuer financial statements at issuance establishing the §1202(d)(1) $50M / $75M gross-asset test was met.
• Annual §1202(e) active-business attestation covering substantially all of the hold period — typically board-approved annual representation.
• Sale documentation showing proceeds and date.
• §1045 election statement (per the §1045 election-statement requirements under Treas. Reg. §1.1045-1, which largely superseded Rev. Proc. 98-48 in 2007) if rollover applied — attached to the return for the year of original sale.
• Cap-table snapshot at issuance and at saledocumenting shareholdings against the issuer's capital structure for §1202(b) per-issuer aggregation.
• Form 8949 Q-code adjustment computation worksheet showing the cap-and-tier arithmetic. Not statutorily required, but standard practitioner substantiation against future audit.

State return — add-back mechanics

The state return picks up the gain at the state-conformity-determined level — which the 50-state grid documents per state. Decoupling and partial-conformity states require add-back entries on the state return:

• California:full decoupling under Cal. Rev. & Tax. Code §17131. Schedule CA(540) is the add-back vehicle — the federal-excluded §1202 gain is added back as California-taxable income at up to 13.3%.
• Pennsylvania:partial conformity at 3.07% flat. PA-40 Schedule D / Schedule SP captures the state-level gain that doesn't flow through from federal Schedule D.
• New Jersey: partial decoupling. NJ-1040 Schedule B captures gain from sale of property; verify with current NJ Division of Taxation guidance for §1202-specific treatment.
• Texas and other no-tax states: no state return entry needed — federal-excluded amount is the entire picture.

See the 50-state grid for the full conformity map and the per-state pages for the exact state-return line and lastVerified date.

Common-mistake ladder — Form 8949 specific

• Mistake 1: missing the Schedule D line 18 routing. Form 8949 code Q correctly identifies §1202; without the 28% Rate Gain Worksheet on Schedule D, the unexcluded slice is taxed at 20% instead of 28%. Under-tax by 8 points; audit-exposure-clean.
• Mistake 2: applying code Q to over-cap gain. Code Q is only for the in-cap exclusion portion. Over-cap gain is regular LTCG with NO adjustment. Use two separate Form 8949 lines.
• Mistake 3: combining §1202 and §1045 on one line.Use separate lines — code Q for §1202 in-cap, code R for §1045-rolled portion. Don't mix codes.
• Mistake 4: filing §1244 on Form 8949 instead of Form 4797. The §1244 ordinary-loss portion belongs on Form 4797 Part II. Only the excess capital- loss portion flows to Form 8949.
• Mistake 5: misstating the §1202(c)(1) date acquired. The acquisition date in column (b) is the §1202 ISSUANCE date — exercise date if §83(b) was filed, vesting/settlement date otherwise, incorporation date for founder shares. Grant dates are wrong.
• Mistake 6: forgetting state add-backs. Federal exclusion does not automatically flow to the state. Decoupling and partial-conformity states require state-level add-back entries. Missing the add-back creates a state-level under- reporting exposure.
• Mistake 7: omitting the §1045 election statement. Without the §1045 election statement (per the §1045 election-statement requirements under Treas. Reg. §1.1045-1, which largely superseded Rev. Proc. 98-48 in 2007) attached to the original-sale-year return, the §1045 deferral is procedurally defective and at risk on audit.

Trust / estate / K-1 flow-through

Trusts and estates file Form 1041; the entity-level Form 8949 attaches to the 1041, and the §1202 character flows to beneficiaries via K-1 under §641(b) for distributed gain. Beneficiaries report the §1202-character flow on their own Form 8949 with code Q in column (f).

Partnership K-1s flow §1202 character to partners via §1202(g) — the partnership's QSBS sale is reported at the partnership level, and partners receive K-1 line 9b (or equivalent in the current K-1 format) identifying the §1202 portion. Partners then report on their own Form 8949 with code Q. The §1045 pass-through under Treas. Reg. §1.1045-1(b)/(c) requires separate partnership-level and partner-level election documentation.

Amended-return path

If a §1202 exclusion was omitted from the original return, the taxpayer can file an amended return (Form 1040-X) within the §6511 statute of limitations (generally 3 years from filing or 2 years from payment, whichever is later) attaching corrected Form 8949 with code Q and the §1202 substantiation package. The §1045 election carries its own amended-return path under the §1045 election-statement requirements (Treas. Reg. §1.1045-1, which largely superseded Rev. Proc. 98-48 in 2007) with similar timing rules — but unlike the §1202 exclusion (which can be claimed via amended return), the §1045 election generally must be made on the original return; amended-return §1045 elections are at IRS discretion.

For the underlying statutes and primary-source URLs, see /sources; for the decoder's computation methodology, see /methodology. For reviewer and editorial information, see /about. For the OBBBA rule-set determination and tier mechanics, see /obbba-cutover-explained, the 5-year holding pillar, the cap pillar, the §1045 pillar, and the §1244 pillar.

Informational, not tax advice. Consult a CPA or Enrolled Agent before acting on a corrective distribution.