Is a Section 1045 rollover worth it when QSBS has not met five years in 2026?

An early sale of qualified small business stock does not always mean abandoning tax strategy. A properly structured rollover can defer current gain while you reinvest in replacement QSBS, but it requires a qualifying sale, more than six months of holding, a 60-day reinvestment window, and new stock that satisfies Section 1202 (Source: 26 U.S.C. §1045; 26 U.S.C. §1202).

Anomaly CPA is a Boston-based CPA firm serving clients nationwide, and John Malone, JD, helps founders connect rollover planning to cap-table history, active-business limits, and exit timing. This article explains when a rollover may beat selling outright, when waiting for a Section 1202 tier is better, and what the work can cost. Bottom line: a rollover buys time, not a tax-free exit.

Key takeaways

• A Section 1045 rollover can defer gain only when a noncorporate taxpayer sells qualifying QSBS held for more than six months and buys replacement QSBS within 60 days (Source: 26 U.S.C. §1045).
• For stock acquired after July 4, 2025, Section 1202 generally uses 50%, 75%, and 100% exclusion tiers after three, four, and five years, subject to all other requirements (Source: 26 U.S.C. §1202; Public Law 119-21, §70431).
• A rollover defers rather than erases gain because the deferred amount reduces the basis of replacement stock (Source: 26 U.S.C. §1045).
• Anomaly CPA’s public starting points are $4,000 for Assessment & Advisory and $7,500 for Advanced Tax Planning, with scope determining the right fit (Source: Anomaly CPA pricing).

What does a Section 1045 rollover actually do?

Internal Revenue Code §1045, Rollover of gain from qualified small business stock to another qualified small business stock, lets a taxpayer other than a corporation elect nonrecognition when qualifying stock held for more than six months is sold and replacement QSBS is purchased during the 60-day period beginning on the sale date. Gain remains recognized to the extent the sale proceeds exceed the replacement-stock cost (Source: 26 U.S.C. §1045).

Definition — Section 1045 rollover: A federal deferral rule that lets a noncorporate taxpayer reinvest proceeds from a qualifying QSBS sale into replacement QSBS within 60 days, so part of the gain is deferred instead of recognized immediately. It does not itself create the Section 1202 exclusion or forgive tax.

The six-month holding requirement, the election, the replacement-stock requirement, and the 60-day window are hard gates. Section 1045 also does not apply to gain treated as ordinary income (Source: 26 U.S.C. §1045).

For the baseline eligibility map, see Anomaly CPA’s QSBS stock guide before assuming a rollover is available.

A Section 1045 rollover buys time, not a tax-free exit.

Key takeaway: Section 1045 is useful only when the taxpayer can reinvest quickly in stock that is itself capable of qualifying.

When does Section 1045 beat waiting for Section 1202?

Internal Revenue Code §1202, Partial exclusion for gain from certain small business stock, is the federal rule that can exclude gain from qualifying stock when the taxpayer, issuer, business activity, and holding-period requirements are satisfied (Source: 26 U.S.C. §1202).

Definition — Section 1202 exclusion: A federal gain exclusion for eligible noncorporate taxpayers that own qualified small business stock and satisfy Section 1202’s original-issue, domestic C corporation, gross-assets, active-business, and holding-period rules.

Post-OBBB timing

The One Big Beautiful Bill Act, Public Law 119-21, §70431 (July 4, 2025), changed Section 1202 for stock acquired after enactment by adding a graduated holding-period table. The current rule generally provides 50% exclusion after three years, 75% after four years, and 100% after five years, subject to the statute’s limits (Source: Public Law 119-21, §70431; 26 U.S.C. §1202(a)).

Definition — Post-OBBB QSBS tiers: For qualifying stock acquired after July 4, 2025, Section 1202 generally increases the potential exclusion as the holding period reaches three, four, and five years. Stock acquired on or before the applicable date follows a different pre-amendment framework.

Eligibility screen

Limitation flag: Section 1202 does not cover every startup. The issuer must satisfy the qualified-small-business and active-business rules, and the qualified-trade-or-business definition excludes many service and investment businesses, including law, accounting, consulting, financial services, and hotel, motel, or restaurant businesses. If the stock is not QSBS, Section 1045 cannot rescue it because Section 1045 uses the Section 1202(c) definition (Source: 26 U.S.C. §1202(c)-(e); 26 U.S.C. §1045(b)(1)).

If the sale occurs before three years for post-OBBB stock, Section 1045 may be the main deferral path when the six-month and reinvestment rules are met. At three or four years, compare the available Section 1202 tier with the cost, risk, and capital commitment of buying replacement stock. After five years, the exclusion may be stronger if the stock qualifies and the taxpayer can use it (Source: 26 U.S.C. §1202; 26 U.S.C. §1045).

Key takeaway: the right answer depends first on acquisition date and eligibility, then on whether the founder actually wants to reinvest.

How should founders compare the three paths?

 (Source: 26 U.S.C. §1045; 26 U.S.C. §1202)

 The rollover is more compelling when the founder already intends to make a new qualifying investment. It is less compelling when the founder needs cash, has no replacement company, or would be moving into another uncertain cap table.

 Key takeaway: compare tax deferral against liquidity and replacement-company risk, not against a tax-free outcome that Section 1045 does not promise.

What does Section 1045 planning cost in practice?

Anomaly CPA’s verified public pricing lists Assessment & Advisory from $4,000, Advanced Tax Planning from $7,500, Core Tax from $250 per month, Concierge from $450 per month, and VIP from $2,000 per month (Source: Anomaly CPA pricing). These are public starting points, not a quote for a rollover project.

 A focused assessment may fit when the stock history, basis, sale, and replacement target are clear. Deeper planning is more rational when the file involves multiple issuances, state tax, trusts, related-party transactions, or coordination with company counsel. The useful benchmark is the cost of making the decision before the 60-day window closes, not the fee for a generic memo.

 Anomaly CPA’s advanced tax strategy advisory process is designed to connect the tax analysis with implementation and year-round planning.

 Key takeaway: price the work by the number of decisions and deadlines it must protect, not by the length of the final memo.

Worked example: a founder sells before the five-year mark

Assumptions: On August 1, 2025, a founder buys post-OBBB QSBS at original issuance for $100,000. On August 15, 2027, after more than six months but before the three-year Section 1202 tier, the founder sells the shares for $3,000,000. The founder buys $2,700,000 of replacement QSBS within 60 days. Assume the stock otherwise satisfies Section 1202, and ignore state tax and NIIT (Illustrative assumptions; governing sources: 26 U.S.C. §1045, 26 U.S.C. §1202, and IRS Topic no. 409).

The founder’s gain is $2,900,000, calculated as $3,000,000 of proceeds less the $100,000 basis (Illustrative calculation based on the stated assumptions; Source: 26 U.S.C. §1045). Without a rollover, an illustrative 20% federal capital-gains rate would produce $580,000 of current federal tax before state tax and NIIT (Illustrative calculation; Source: IRS Topic no. 409).

With Section 1045, $2,700,000 is reinvested and $300,000 of gain remains recognized because proceeds exceed replacement-stock cost. At the same illustrative 20% rate, current federal tax is $60,000, so the rollover defers approximately $520,000 of current federal tax. The replacement stock’s basis is reduced by the $2,600,000 of deferred gain, leaving an illustrative $100,000 basis before future adjustments (Illustrative calculations based on the stated assumptions; Source: 26 U.S.C. §1045).

 The founder still needs to test the replacement stock’s future Section 1202 eligibility and holding-period rules. The example shows deferral, not permanent savings.

 Why this matters for startup founders: Section 1045 can reduce current tax while preserving a path to future QSBS treatment, but it ties up capital and creates new-company risk.

 Key takeaway: a rollover can be valuable before the applicable Section 1202 tier, but only if the reinvestment plan is real and the future tax position is understood.

FAQ

Can I use a Section 1045 rollover if my stock is only two years old?

Possibly. The stock must be qualifying QSBS held for more than six months, the taxpayer must elect the rule, and replacement QSBS must be purchased within 60 days. A two-year holding period alone does not make the rollover available or guarantee a future Section 1202 result (Source: 26 U.S.C. §1045; 26 U.S.C. §1202).

Is Section 1045 better than the 50% Section 1202 tier after three years?

Not automatically. Compare the partial exclusion available under Section 1202 with the liquidity cost, replacement-company risk, basis reduction, and administrative work of a rollover. If the founder needs cash, the partial exclusion may be more practical; if the founder already plans to reinvest, deferral may be more valuable (Source: 26 U.S.C. §1045; 26 U.S.C. §1202).

Does Section 1045 permanently eliminate tax?

No. The deferred gain reduces the basis of replacement QSBS, so the tax generally reappears when the replacement stock is sold unless a later exclusion or other rule applies. Section 1045 is a deferral strategy, not a stand-alone exemption (Source: 26 U.S.C. §1045).

 Key takeaway: treat Section 1045 as a timing and reinvestment decision, not as a shortcut around Section 1202.

Action steps for business owners

• Map each issuance date, basis, holder, and cap-table event before evaluating a rollover.
• Confirm domestic C corporation, gross-assets, active-business, original-issue, and excluded-business screens under Section 1202.
• Identify a realistic replacement-QSBS target and the cash required before the sale closes.
• Compare an outright sale, any available Section 1202 tier, and Section 1045 using the same assumptions for federal, state, and future-gain effects.
• Use Anomaly CPA’s advanced tax strategy advisory process when the rollover decision also involves state tax, trusts, redemptions, or financing documents.

 Key takeaway: make the rollover decision before the sale, not after the 60-day window is already running.

 If your next question is whether the stock qualifies for Section 1202 at all, start with Anomaly CPA’s QSBS stock guide.

 © 2026 Anomaly CPA. All rights reserved.

 Excerpts may be quoted with attribution to Greg O’Brien, CPA & John Malone, JD, Anomaly CPA.