The 18-Month Pre-IPO Tax Checklist: What to Do and When

The 18 months before an IPO are where the tax bill for the IPO year gets largely determined. Moves executed in this window reduce the eventual tax by 15-40% on a typical founder or senior-employee position. Moves not executed in this window cannot be recovered after filing.

The work is front-loaded because most relevant tax strategies involve property transfers, entity formations, trust funding, and elections that require pre-IPO status to be effective. Post-IPO, the stock is public and many strategies become harder or impossible. §1202 QSBS stacking, lifetime-exemption gifting to dynasty trusts, §1045 rollover planning, and early exercise of ISOs all work better pre-IPO than post.

This checklist covers the 18-month window for a senior employee, executive, or founder preparing for an IPO. Each item has a deadline and a rationale. Work through the list with your tax advisor and attorney as soon as a credible IPO timeline is in view.

Months 18-12: Structural Moves

1. Confirm §1202 QSBS status. If any of your stock was issued when the company’s gross assets were under $50M, it may be QSBS-eligible. Confirm:

   • Stock was issued directly by the corporation (not purchased from another holder).
   • Company was a C-corp.
   • Gross assets at or immediately after issuance were under $50M.
   • The business is a “qualified trade or business” (excludes professional services, financial services, hospitality, farming, extraction).
   • The 5-year holding period is tracked. Sale one day short of 5 years disqualifies.

   Document and confirm in writing. Missing documentation costs millions in audit.

2. Execute QSBS stacking via non-grantor trusts. Each separate QSBS-eligible holder qualifies for the $10M/10x exclusion under §1202(b). A founder with $50M of QSBS can transfer portions to non-grantor trusts for children (each a separate taxpayer), multiplying the exclusion. The transfer must happen while the stock is QSBS and before any sale or exchange that would trigger recognition. Stacking trusts should be established 12+ months before the expected sale.

3. Use lifetime gift exemption before 2026. The 2025 federal lifetime gift exemption is $13.99M per person. It is scheduled to drop to approximately $7M in 2026 unless Congress extends. Founders with large upcoming gains should use the 2025 exemption through gifts to dynasty trusts, family LLCs, or outright gifts to heirs. Late 2025 is a critical window.

4. Fund GRATs with pre-IPO stock. A Grantor Retained Annuity Trust takes stock and returns the grantor a fixed annuity over 2-5 years. Any appreciation above the §7520 hurdle rate (currently around 5%) flows to the remainder beneficiaries (typically children or a trust) without gift tax. IPO appreciation above the hurdle transfers out of the estate. 2-year rolling GRATs of pre-IPO stock are a standard move.

5. Early exercise NSOs where available. If you hold NSOs with early exercise rights, exercising pre-IPO while the spread is small creates minimal ordinary income and starts the capital-gain clock. Combined with an 83(b) election within 30 days of exercise, future appreciation is capital gain.

6. Establish DAF or private foundation. If you plan to give substantial appreciated stock charitably, setup takes 2-6 months for a foundation, 2-4 weeks for a DAF. Establish the vehicle before you need it.

Months 12-6: Equity Moves

7. Analyze ISO exercise timing. Incentive stock options create AMT preference income under §56(b)(3) equal to the spread at exercise. Exercising pre-IPO when the 409A is low minimizes the AMT hit. Exercising in the year before the IPO allows the 1-year + 2-year qualifying-disposition holding periods to be satisfied before post-IPO sales.

8. Plan around the 409A to IPO-price gap. The 409A usually trails the expected IPO price by 30-60%. Exercising options at 409A price and holding to IPO captures the gap as capital gain if held long-term. This is the primary pre-IPO wealth-building move for option holders.

9. Section 83(b) elections if applicable. For early exercise of unvested options, 83(b) within 30 days converts ordinary income (at vest) to capital gain (at sale). Filing deadline is strict.

10. Section 83(i) elections for qualifying private-company RSUs. If eligible (80% employee coverage requirement), 83(i) defers RSU vesting tax for up to 5 years. Election within 30 days of vesting.

11. Review RSU double-trigger structure. Most private-company RSUs vest on time + liquidity event. Confirm the specific IPO-event trigger language. Some structures produce earlier vesting than expected.

12. Plan 10b5-1 plan for post-IPO selling. Rule 10b5-1(c)(1) requires plans to be established while you do not have material non-public information. Pre-IPO is the cleanest window. Minimum 90-day cooling-off period between plan establishment and first trade. Plan should outline selling schedule for the first 12-24 months post-IPO.

Months 6-3: Pre-Filing Moves

13. Establish residency in favorable state if moving. If you plan to relocate to a lower-tax state before or after IPO, California’s trailing-nexus rules can still capture state tax on equity earned during California employment. Residency establishment takes 6+ months of actual presence and formal steps.

14. Review state tax exposure. California, New York, New Jersey have meaningful state tax on equity comp. Structured relocations (Florida, Texas, Nevada) can save 7-13% on post-move equity. Must be completed before vest or sale dates.

15. Structure spousal gifts. Gifts to spouse are unlimited under §1041 if spouse is a U.S. citizen. Gift to non-citizen spouse limited to $190,000 per year for 2025. If spousal gifts are part of planning, execute well before IPO.

16. Estate plan refresh. Pre-IPO valuations are lower than post-IPO valuations for estate-planning purposes. Gifts and trust funding done with pre-IPO valuations use less of the lifetime exemption.

17. Prepare for lockup modeling. Typical IPO lockup is 180 days post-IPO. Understand when your lockup ends and plan the 10b5-1 to begin selling at that point.

18. Review insurance and umbrella coverage. Post-IPO, coverage should increase. Underwriters prefer pre-event application; timing the upgrade for just before IPO is often easier.

Months 3-0: Final Moves

19. Confirm estimated-tax safe-harbor status. Federal safe harbor requires paying 110% of prior-year tax (if AGI over $150K) through withholding and estimates to avoid underpayment penalty on current year. Review Q3 and Q4 estimates.

20. Position liquidity. After IPO filing, insider sales may be restricted. Pre-filing is often the last window to access concentrated-stock for lifestyle or gift needs. Do not leave yourself cash-constrained post-IPO.

21. Review executive compensation structure post-IPO. Section 16 officers face additional constraints (short-swing profit, 10b5-1 requirements, Form 4 filings). Compensation committee coordination is necessary.

22. Document everything. The audit risk on large-stakes pre-IPO moves is real. Maintain dated correspondence, board minutes, trust funding documents, valuation support, 83(b) filings, and election acknowledgments.

23. Rehearse the IPO-week cash flow. Understand the specific dates of withholding events, escrow releases, and tax estimate due dates. Map the cash flow for the quarter.

Post-IPO: First 90 Days

After IPO, certain additional moves become relevant:

24. Execute 10b5-1 sales per plan. After the plan’s cooling-off period expires and after lockup ends, sales occur on schedule.

25. Diversification via charitable giving. Post-IPO appreciated stock gifted to DAF captures FMV deduction without gain recognition. Limit is 30% of AGI for public stock.

26. Exchange fund contribution. §721 exchange funds accept concentrated stock for diversified position. 7-year hold. Meaningful for $5M+ concentrated positions.

27. Consider §1045 QSBS rollover. If QSBS is sold with more than $10M gain and the taxpayer wants deferral, rolling proceeds into other QSBS within 60 days defers the remaining gain.

28. First-year tax return complexity. Engage the tax preparer early. The exit-year return is complex and should not be left to April 1 preparation.

Common Mistakes

1. Waiting until S-1 filing to start planning. By then, moves requiring pre-IPO valuation advantage are over. Ideal planning window starts 18 months before filing, not 6 weeks.

2. Skipping QSBS analysis. Many founders and early employees don’t realize their stock qualifies. Documentation assembled 5 years later is harder.

3. Under-using 2025 lifetime exemption. $13.99M per person dropping to $7M in 2026. Founders who don’t use the 2025 window may pay estate tax in 2026+ on wealth that could have been gifted.

4. Over-exercising options before IPO. Early exercise makes sense strategically but requires cash for the strike. Over-exercising at 409A price of $40 on 50,000 options is $2M out of pocket. Liquidity must be available.

5. Ignoring state tax planning. Moving two months before IPO instead of twelve months before can cost $500K-$2M in trailing-nexus tax.

Frequently Asked

Can I execute this checklist myself? No. The moves require coordinated effort from an estate attorney, tax attorney, CPA, and financial advisor. Legal fees for the pre-IPO window commonly run $100K-$500K. Savings typically 10-20x the fees.

What if the IPO is delayed? Plans stay in place. Many of the moves (QSBS, §83(b), GRATs) benefit from extended timelines. Some (lifetime exemption) have calendar deadlines regardless of IPO timing.

Should I work with my company’s outside counsel? The company’s counsel represents the company. You need your own representation. Coordinate but do not rely on company counsel for personal planning.

What about the 10b5-1 cooling-off period after the SEC 2022 rule changes? 90-day minimum between plan establishment and first trade. 30-day window for Section 16 officers on plan modifications. Plans established pre-IPO and properly documented typically work cleanly.

How much does a pre-IPO tax plan cost? $100K-$500K in professional fees for a senior employee or founder. $500K-$2M for complex situations involving trust structures, foundations, and significant gift planning. Savings typically multiple of fees.