Holding period planning before a secondary sale: how timing affects what you keep.

Tax planning on a secondary sale often gets compressed into a conversation that happens after you have already agreed on price. That ordering is backwards. Your holding period — how long you have owned the shares or options you intend to sell — is one of the largest determinants of your net proceeds, and it is fixed by decisions made months or years earlier. This article is for accredited sellers who want to audit their position before they list, not after.

The basics: what holding period actually measures

For U.S. federal income tax purposes, a capital asset held for more than one year qualifies for long-term capital gains (LTCG) treatment. In 2026, the top LTCG rate for high-income taxpayers is 20%, plus the 3.8% net investment income tax (NIIT), for a combined federal rate of 23.8%. Short-term gains — from assets held one year or less — are taxed as ordinary income, which can reach 37% federally. The gap is real and material.

What counts toward your holding period depends on what you own. If you hold common shares directly, the clock starts on the purchase or acquisition date. If you exercised incentive stock options (ISOs) or non-qualified stock options (NSOs), the clock starts on the exercise date, not the grant date. If you purchased shares through an SPV, your holding period typically starts when you acquired your membership interest in that vehicle, not when the SPV itself acquired the underlying shares.

Early exercise and the 83(b) election: how it changes the math

Some employees and early team members exercise stock options before they vest — a practice called early exercise. When done correctly and accompanied by a timely 83(b) election filed within 30 days of exercise, the holding period starts at the exercise date rather than the vesting date. This can meaningfully accelerate LTCG eligibility and, in some cases, the QSBS qualifying period (discussed below).

If you exercised early but did not file an 83(b) election, the IRS treats unvested shares as subject to a substantial risk of forfeiture. Your holding period for those shares starts only when each tranche vests. This does not affect your ability to sell vested shares on a secondary market, but it does mean that some of your shares may carry a shorter clock than you assume if you are modeling the entire position as a single lot.

This is where tax lot selection becomes important. If you hold multiple lots with different acquisition dates, you can often choose which lot you are selling — and therefore which holding period and cost basis applies. The rules for lot identification require you to make an adequate identification of the specific shares at or before the time of sale. On a secondary platform, this means specifying the lot in your transfer documentation, not deciding retroactively at tax time.

QSBS: the longer clock that matters most

Section 1202 of the Internal Revenue Code — commonly called the QSBS exclusion — allows non-corporate holders to exclude up to 100% of gain on the sale of qualified small business stock, subject to per-issuer caps (the greater of $10 million or 10 times the taxpayer's adjusted basis). To qualify, among other requirements, the stock must have been held for more than five years.

For a secondary seller, the five-year QSBS clock is measured from the original acquisition date of the shares. If you exercised options in 2021 and are considering a secondary sale today, you are past the five-year threshold — assuming the company otherwise meets QSBS requirements, which include a $50 million gross asset test at the time of issuance. If you exercised in 2022, you are not yet there.

Sellers who are within months of crossing five years face a meaningful decision: list now and forgo a potentially substantial exclusion, or wait and list after the anniversary. Secondary sale timing around the company's own primary financing schedule is a related variable worth modeling alongside the QSBS clock. The answer depends on your confidence in the secondary market price holding (or improving), your liquidity needs, and your tax counsel's view on whether your shares actually qualify. QSBS eligibility is a facts-and-circumstances determination and this article is not a legal opinion — review the specifics with a qualified advisor.

State taxes: the variable that makes modeling harder

Federal rates are only part of the story. California taxes capital gains as ordinary income at rates up to 13.3%, with no distinction between short-term and long-term. Tax residency timing is its own variable: which state's rules apply often depends on where you are domiciled at closing, not when you exercised. New York adds up to 10.9% for city and state combined. If you have relocated since acquiring your shares, the sourcing rules for equity income vary by state and can be contested. Some states tax based on the number of days worked in the state during the vesting period, even if you no longer live there at the time of sale.

For California residents specifically: there is no state QSBS exclusion after California decoupled from Section 1202 years ago. A position that carries a 100% federal exclusion can still generate a full California income tax liability. Sellers with large California-source QSBS gains should model both federal and state outcomes separately before setting a reserve price.

Practical steps before you list

1. Pull your equity award agreements and confirm the exercise date (not grant date) for each lot you are considering selling.
2. Check whether an 83(b) election was filed and whether it is in your records. If you are unsure, your company's equity administrator or outside counsel should have a copy.
3. Map each lot to a holding period start date and flag any lot approaching a 12-month or 60-month anniversary within the next six months.
4. Identify whether any lot may qualify for QSBS treatment and request a confirmation memo from your tax counsel before listing — not after accepting a bid.
5. If you hold shares through an SPV, review the operating agreement to confirm when your membership interest was acquired and whether the vehicle's own holding period transfers to you on any notional exit or exchange.
6. Build a net proceeds model that shows after-tax proceeds under short-term, long-term, and QSBS scenarios at the price range you are considering. Use this model when evaluating bids.

Where timing interacts with settlement speed

Secondary transactions do not close instantaneously. ROFR clearance, company consent, SPV documentation, and fund settlement can collectively span one to five business days on a well-run platform, or several weeks on a slower one. If you are timing a sale around a holding period anniversary, you need to know whether the date that matters is the date you execute the agreement, the date the transfer registers on the cap table, or some other event. Your tax counsel can clarify which date controls for your specific structure.

We settle most transactions in one to five business days, and ROFR clearance runs in parallel with execution on our platform rather than sequentially — which compresses the timeline considerably versus platforms where ROFR waits until after the purchase agreement is signed. If you are within two weeks of a holding period milestone, confirm the expected settlement calendar before you accept a bid.

Next step

If you are ready to model your net proceeds across tax scenarios, start at /resources/net-proceeds-modeling-secondary-sale. To review your transfer documentation requirements and start the listing process, visit /sell. For the wider context on secondary sale tax planning, see our standing tax-and-legal reference.