A Section 1045 rollover can defer gain, but the replacement stock must qualify. Cash retained by the replacement company requires a working-capital and asset-use analysis. The first-six-month test for the deferral, the company-age limit on working capital, and the holding-period requirements for a later exclusion apply separately. The examples below show why a budget or a single balance-sheet snapshot cannot establish the tax result.
For the mechanics of the rollover itself — the 60-day window, the more-than-six-month holding requirement, basis adjustments, and holding period tacking — see Section 1045 Rollovers: How to Defer QSBS Gains. This post examines the first-six-month active-business test for deferral, the replacement holding period for a later exclusion, and the separate working-capital rules.
The Rule Stack: The Replacement Company's Balance Sheet Controls
Three layers of rules apply to the company receiving your rollover money.
The 80% test. Section 1202(e)(1) requires at least 80% of asset value to be used in qualified active businesses. Section 1202(e)(2) permits specified start-up and research activities connected with a future qualified business to count before revenue begins. Writing code alone does not establish qualification: the activities, intended business and use of assets must meet the statutory requirements.
The six-month test for the deferral. Under Section 1045(b)(4)(B), the replacement corporation must satisfy the active business requirement during substantially all of the first six months of your holding period in the replacement stock. Fail that window and the consequence is not merely a lost exclusion at exit. The replacement stock is not qualified small business stock for purposes of the deferral, so the gain is recognized in the year of the original sale, with interest from that year’s return due date and potentially penalties.
The replacement-period test for the exclusion. Section 1223(13) expressly excludes §1202(c)(2)(A) from rollover tacking. Evaluate the replacement issuer’s active-business and C-corporation status during substantially all of the replacement holding period; do not dilute a failure with years from the original issuer. The statute supplies no general 80% or 90% time safe harbor.
The Working Capital Rules: Section 1202(e)(6)
Cash is not an active business asset. Section 1202(e)(6) provides the two exceptions that every rollover into a young company depends on. Cash counts as used in the active conduct of a qualified trade or business if it is:
(A) held as part of the reasonably required working capital needs of the business — no time limit, but bounded by what operations actually require; or
(B) held for investment and reasonably expected to be used within 2 years to finance research and experimentation or increases in working capital.
Then the cliff: once the corporation has been in existence for at least 2 years, no more than 50% of its assets can qualify as working capital under these rules — both prongs combined.
A useful illustration: Assume the company has only cash and assets otherwise used in the qualified business. Once the 50% working-capital limitation applies, a company with more than 70% of its value in cash cannot reach the 80% active-business threshold even if the maximum permitted amount of cash qualifies as working capital. At 70% cash, the company needs the full working-capital allowance to reach 80%. Even at 50% cash, 30% of total assets must still qualify as working capital to reach 80%. This is arithmetic, not a statutory safe harbor: the company still must establish that the cash actually qualifies under §1202(e)(6).
Two additional limits require attention: non-subsidiary corporate stock or securities above 10% of net asset value, subject to the express working-capital exception in §1202(e)(5)(B), and nonbusiness real property above 10% of total asset value under §1202(e)(7).
Keep the Two-Year Company-Age Rule Separate
Do not treat the 50% working-capital cap for corporations at least two years old as automatically governing a newly formed company’s initial six months. Those are different time tests; apply the statute to the actual dates and facts.
The following scenarios illustrate the statutory tests, not automatic conclusions from another taxpayer’s litigation.
One Rollover, Five Trajectories
Assume a valid rollover of $2 million of sale proceeds into a newly formed C corporation after a three-year original hold. For a pre-July 5, 2025 acquisition date, the later combined holding period must exceed five years. Every scenario also requires the replacement company’s own qualification analysis.
Scenario 1: The Executed Plan
A written deployment budget and actual business activity support the working-capital analysis. They do not guarantee qualification. Test asset values, the use and amount of qualifying working capital, the first-six-month requirement and the replacement-period exclusion requirement separately.
Scenario 2: The Honest Plan That Slips
A delayed plan requires a fresh factual assessment. Cash left at month 18 does not automatically fail, and an initial honest intention does not automatically establish the first-six-month test. Examine the expectations and activities at the relevant times and the use of each asset.
Document genuine changes to the deployment plan. Later revisions do not retroactively cure an earlier failure. Distributing excess cash can have dividend, gain or redemption consequences and requires separate analysis; it is not a generic tax-free fix.
Scenario 3: The Cash Box Redeemed by Value
Self-created IP can have value despite a low tax basis, but equity valuation is not automatically gross asset value. Obtain a defensible valuation of actual active-use assets at the relevant dates. If active assets are $8 million and cash is $2 million, the simplified 80% composition test can be met without counting cash as working capital; that later snapshot does not establish earlier compliance.
Gain above the §1202 per-issuer eligible-gain cap is not automatically subject to the 28% rate. Section 1(h)(7) addresses the eligible gain left taxable because of the exclusion percentage. Excess-cap long-term gain generally follows the regular capital-gain rates, with NIIT if applicable. Determine the acquisition-date regime and gain limit separately. See §1(h)(4) and (7).
Scenario 4: The Cash Box at Liquidation
A later liquidation for cash is evidence of value at liquidation, not proof that the IP was worthless at every earlier date or that an earlier research plan was insincere. A business can genuinely try and fail. Assess contemporaneous activities, asset values and working-capital expectations before concluding that the deferral or exclusion failed.
A failed rollover can produce federal and Washington tax, interest and possibly penalties for the original sale year. The amount depends on that year’s law, the taxpayer’s rates and the available exclusions and deductions. Washington’s capital-gains rates are 7% plus a 2.9% increment above $1 million of Washington capital gains—not 7% plus 9.9%. Recalculate using the statutory adjusted base; a flat estimated loss is not a reliable substitute.
Scenario 5: The Rollover That Never Should Have Happened
If cash does not satisfy either working-capital route and the other assets cannot meet the 80% test, the active-business condition may fail. Determine whether the actual first-six-month facts invalidate the deferral, then evaluate reporting, interest and any penalties. Lack of a qualifying two-year investment expectation does not itself negate genuinely required working capital under the separate prong (A).
Section 1045 permits partial reinvestment and purchases from multiple qualifying replacement issuers within the 60-day window. Compare each company’s actual capital needs and expected asset mix before investing. A credible deployment plan supports that analysis but does not establish eligibility. Recognized gain is limited to the gain realized and depends on proceeds less qualifying replacement cost, with any available Section 1202 exclusion analyzed separately. Reinvesting all proceeds is not itself a defect; the replacement stock must satisfy the applicable requirements.
How Much Can You Actually Roll?
The sizing question has a method, not just a principle. Work it in three steps before the wire goes out.
Step 1: Build a documented budget. A deployment budget and operating reserve are planning inputs, not a statutory rollover-capacity formula. Avoid double-counting cash uses and assets created by those uses. There is no automatic 12–24-month reserve safe harbor; the amount must reflect the actual qualified business’s needs.
A $1.2 million spending budget plus a $300,000 reserve gives a $1.5 million planning input. It does not establish that $1.5 million—or $1.7 million—can safely qualify. Test the projected balance sheet and legal requirements separately.
Step 2: Run the math on proceeds, not gain. Section 1045(a) measures the deferral against proceeds reinvested: gain is recognized to the extent the amount realized exceeds the cost of replacement stock. For a founder with near-zero basis, proceeds and gain are nearly the same number and the distinction is invisible. For a seller with meaningful basis it changes the arithmetic — to defer the full gain you must reinvest the full sale proceeds, not just the gain portion. A seller with $2.5 million of proceeds and $2 million of gain who reinvests only $2 million recognizes $500,000 of gain, whatever the intent was.
Step 3: Stress-test the second birthday. Project the actual assets under a slow case. Above 70% cash, the simplified two-category model cannot reach 80% active use even if the full working-capital allowance is available. That is a conditional composition result, not an instruction that every company must distribute cash or reduce its financing.
The calculator illustrates reinvestment arithmetic and a simplified balance sheet for a company formed when the replacement investment is made. It assumes qualifying replacement stock and a valid Section 1045 election. It does not establish a legally safe investment amount, historical compliance or a later Section 1202 exclusion.
Section 1045 Rollover Sizing Calculator
Illustrate a planned replacement investment and a simplified cash/active-assets balance sheet. A budget or favorable ratio is not proof of §1045 or §1202 qualification.
The Maintenance System
Monitor actual activities and asset values, and preserve contemporaneous records supporting the analysis. At the time of the investment, document the intended uses of the capital, expected timing, material contingencies, and the company’s projected asset mix. The plan should reflect actual expectations rather than a tax-driven reconstruction.
Revisit the analysis when material facts change and periodically thereafter. Review asset values and uses, the working-capital limitation, and the separate portfolio-security and real-property limits. Preserve financial records, evidence of actual business activities, deployment plans, and relevant valuation materials. No budget, annual memo, valuation, or attestation establishes qualification by itself. Investors should arrange access to the company information needed for those reviews.
Rolled gain into a company you don't control?
An annual attestation practice like QSBS Sentinel™ can help organize replacement-stock records and periodic reviews. A letter documents the analysis; it does not establish qualification by itself. Book a 20-minute call to discuss the replacement company’s activities, asset mix and recordkeeping.
Frequently Asked Questions
Does the replacement company have to spend the rollover money within 2 years?
Not necessarily. The two working-capital routes and the company-age cap apply to the actual assets and expectations. In the simplified model, 70% cash is only a conditional boundary; even at 50% cash, working-capital qualification is needed to reach 80% active use.
What is the six-month rule in a Section 1045 rollover?
Under Section 1045(b)(4)(B), the replacement corporation must satisfy the active business requirement during substantially all of the first six months of your holding period in the replacement stock. Failing it invalidates the deferral itself: the gain is recognized in the year of the original sale, not the year the failure is discovered.
Can I roll into more than one company?
Yes. Section 1045 permits partial rollovers and multiple replacement issuers within the 60-day window, and gain is recognized only to the extent sale proceeds exceed the total cost of replacement stock. Sizing each rollover to each company's genuine deployment capacity is the cleanest protection against the working-capital trap.
What happens if the replacement company fails the active business test?
Assess whether the failure defeats the applicable “substantially all” requirement. If it invalidates the first-six-month condition, the original deferral may fail. A later problem can defeat exclusion without undoing a valid initial rollover. A further rollover requires fresh QSBS eligibility and the separate more-than-six-month test; it is not an automatic escape.
Does the 50% cap always apply immediately after a rollover?
No. The 50%-of-assets working-capital cap applies after the corporation has existed for at least two years. A rollover into an older corporation can encounter it immediately; a newly formed corporation reaches it later. The first-six-month deferral test is separate.
This post is for educational purposes only and is not legal or tax advice. Consult a qualified attorney about your specific situation.
Related Resources
- Section 1045 Rollovers: How to Defer QSBS Gains — the mechanics: the 60-day window, tacking, basis, and strategy
- QSBS Attestation Letters: Eight Useful Elements — the factual record used to assess qualification over time
- Have You Done Your QSBS Substantiation This Year? — why reconstruction at exit fails and annual records win
- QSBS Stacking: Multiplying the Exclusion with Trusts and Gifts — for exits approaching the per-issuer cap
