US Acquirer Navigates Israeli Section 102 Withholding Tax in Startup Acquisition

Result: USD 18M acquisition closed on schedule with full Israeli tax compliance · Timeline: 5 weeks for ITA withholding confirmation letters · Challenge: US acquirer unaware it was a mandatory Israeli withholding agent under Section 164 of the Income Tax Ordinance 1961 · Authority: Israel Tax Authority Large Enterprises Unit, Section 102 trustee bank · Financial Impact: Founders received proceeds at 25% capital gains rate vs. up to 50% ordinary income rate if Section 102 conditions had been breached

Background

A US-based technology company agreed to acquire a Tel Aviv software startup in a 100% share purchase transaction for total cash consideration of USD 18 million. The Israeli company had four founders and twelve employees. The founders collectively held approximately 60% of the issued share capital; two venture capital investors held the remainder.

All four founders' shares had been granted under Section 102(b)(2) of the Income Tax Ordinance 1961 — the capital gains track of Israel's employee share plan regime — and held through a trustee bank appointed under the plan. The Section 102 trusted route provides a preferential 25% capital gains rate on exit proceeds, compared to a marginal income tax rate of up to 50% if shares are held outside the plan or if the plan conditions are violated.

The US acquirer had retained Israeli corporate counsel to handle the company-side closing documents. During due diligence, we identified two issues the US M&A team had not anticipated.

The Challenge

The first issue was the mandatory withholding obligation. Under Section 164 of the Income Tax Ordinance 1961, any purchaser — including a foreign company — that acquires shares from Israeli-resident sellers is treated as a withholding agent and is personally liable for Israeli capital gains tax withheld at source. The US acquirer was required to calculate the applicable withholding rate for each founder, deduct that amount from the closing proceeds, and remit it to the Israel Tax Authority within 30 days of closing. Failure to do so correctly exposes the acquirer to secondary liability for the full underpaid tax amount — with interest and penalties.

The second issue was the Section 102 trustee structure. The founders' shares were not registered in their individual names in the capitalization table; they were held by the Section 102 trustee bank. Any transfer to the US acquirer had to go through the trustee, with verification that the mandatory 24-month holding period under Section 102(b)(2) had been satisfied for each tranche being sold. Shares transferred within 24 months of grant lose the capital gains treatment and are taxed as ordinary employment income — which the founders could not afford, and which the acquirer could not risk if it wanted a clean purchase.

In Practice: Under Section 164 of the Income Tax Ordinance 1961, a foreign purchaser acquiring Israeli-resident shareholders' shares is liable to withhold capital gains tax at source — currently at a default rate of 25% for qualifying capital gains — and to remit the withheld amount to the Israel Tax Authority within 30 days of the closing date. We filed individual withholding certificate applications (ishur nikui) for each of the four founders with the ITA's Large Enterprises Unit in Tel Aviv. Each application was supported by the Section 102 trustee's grant documentation and the individual's most recent Israeli tax return. The ITA issued confirmation letters specifying the approved withholding rate for each founder within five weeks of submission.

What We Did

We filed withholding certificate applications with the ITA's Large Enterprises Unit in Tel Aviv for each founder simultaneously, rather than sequentially, to protect the closing schedule. The documentation package for each application included:

• The Section 102 trustee bank's confirmation of the original grant date and the number of qualifying shares, with the 24-month lock-up calculation for each tranche
• Evidence that the mandatory holding period had elapsed for all shares being transferred in the transaction
• Each founder's Israeli tax residency status confirmed from their most recent filed tax returns
• The allocation of each founder's share of the USD 18 million consideration based on the capitalization table, translated to NIS at the Bank of Israel reference rate on the application date

Three of the four founders were straightforward: all shares had been held for more than 24 months, all founders were Israeli tax residents, and the applicable rate was confirmed at 25%.

The fourth founder had emigrated from Israel two years before the transaction. He had ceased to be an Israeli tax resident before the closing date. We prepared a separate submission to the ITA arguing that as a non-resident at the date of sale, his gain on shares in an Israeli company that held no Israeli real estate was not taxable in Israel — and that under Article 13 of the US-Israel Tax Treaty, exclusive taxing rights on capital gains from share disposals (outside of real-estate-holding companies) belong to the seller's country of residence. The ITA accepted that position, and the confirmation letter for the fourth founder specified a 0% withholding rate.

We also negotiated a withholding escrow mechanism in the share purchase agreement. At closing, 25% of each Israeli-resident founder's proceeds was held in a designated escrow account. Those funds were released to the ITA immediately upon receipt of the confirmation letters — protecting the US acquirer from any secondary liability claim during the ITA review period. The escrow arrangement was unfamiliar to the US M&A attorneys but was accepted without difficulty once the Israeli legal rationale was explained.

For context on Israel's broader investment incentive framework for foreign-owned companies, our guide to R&D grants and tax benefits for Israeli technology companies covers the Innovation Authority and Preferred Enterprise regime that operated in parallel with this acquisition.

The Outcome

The ITA issued individual withholding confirmation letters for all four founders within five weeks of the initial applications. Three founders were confirmed at 25%; one was confirmed at 0% under the treaty.

The deal closed on the originally scheduled date. Withheld amounts for the three Israeli-resident founders were remitted to the ITA within 30 days of closing. The ITA issued written confirmation of receipt, and the US acquirer was released from further withholding liability for the transaction.

Total proceeds to Israeli founders: approximately USD 10.8 million, after accounting for the VC investors' proportional share. The three Israeli-resident founders received net proceeds after Israeli tax at the 25% rate — a significantly better outcome than the 50% marginal income tax rate that would have applied had any Section 102 condition been violated at closing. The fourth founder received his proceeds with no Israeli withholding.

The US acquirer subsequently asked us to prepare a briefing document on Israeli M&A tax obligations for their general counsel's office, to add to their standard due diligence checklist for future Israeli transactions.

Key Takeaways

What this case illustrates for US and international companies acquiring Israeli businesses with employee share plans:

1. Foreign acquirers are mandatory withholding agents under Section 164 of the Income Tax Ordinance 1961. This obligation applies even where the acquirer has no Israeli presence, no Israeli employees, and no prior connection to the Israeli tax system. Secondary liability for the full unpaid tax — with interest and penalties — attaches if withholding is missed.
2. Section 102 shares require trustee coordination before closing. The 24-month lock-up calculation must be verified for each tranche of shares being transferred, because shares that do not satisfy the holding period revert to ordinary income treatment on exit. This is not something the capitalization table alone reveals.
3. File withholding certificate applications during due diligence, not at signing. The ITA's five-week turnaround is achievable when applications are filed early and documentation is complete. Filing at or after signing compresses the timeline and creates genuine closing risk.
4. Non-resident founders require separate ITA analysis. A founder who has left Israel before the transaction may qualify for treaty-based elimination of Israeli withholding on their share proceeds. The analysis depends on residency at the date of sale, the nature of the Israeli company's assets, and the applicable treaty's capital gains article.

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Facing a Similar Situation?

Israeli startup acquisitions involve Israeli-specific tax compliance obligations that US and international M&A counsel regularly encounter for the first time on a deal. Early engagement with Israeli tax counsel — before the letter of intent is signed — avoids last-minute complications and protects both the acquirer and the selling founders.

Contact us for a confidential consultation about your Israeli business or acquisition matter.