The reality for Australian startups when issuing U.S. employee equity

Expanding to the United States is a major milestone for many Australian startups. However, founders often don’t realise that their employee share ownership plan (ESOP) may not comply with U.S. accounting and regulatory standards until high-stakes moments, such as during investor due diligence or acquisition negotiations.

By the time these issues surface, fixing structural errors can result in costly delays, significant legal fees, and frustrated employees. Deal velocity and company credibility can also take a hit.

This article explores various regulatory and compliance considerations for Australian startups when issuing equity to U.S. employees—covering valuations, grant limits, and tax implications.

ESS vs. 409A valuations

A common misconception among Australian founders is that an Employee Share Scheme (ESS) valuation approved by the Australian Tax Office (ATO) would also be accepted under U.S. accounting standards. While both 409A valuations and ESS valuations are used to determine the fair market value (FMV) of private company shares, they are subject to different regulatory frameworks.

Under the Australian ESS framework, private companies can perform equity valuations internally by following ATO safe harbor methods. This offers more flexibility compared to 409A valuations in the U.S., which are typically conducted by an independent third party and must comply with regulations issued by the Internal Revenue Service (IRS).

If the IRS determines that a company has issued share options “in the money” (i.e., options with a strike price below the FMV determined by a 409A valuation), any employees based in the U.S. may face severe penalties, including:

• Immediate taxation: All deferred compensation becomes taxable immediately upon vesting.

• Accrued interest: The IRS applies interest to the revised taxable amount from the date of the equity grant.

• 20% excise tax: An additional federal penalty tax is applied to the employee.

→ See what a best-practice 409A valuation report looks like, so you can issue equity compliantly to U.S. employees.

Treating 409A valuations as a continuous requirement

If you want to continue issuing equity to employees in the U.S., having a 409A valuation is not a “set it and forget it” requirement. For a valuation to retain its safe harbor status with the IRS, it must be refreshed: 

• Every 12 months: Even if no major business changes occur, a 409A valuation expires annually.

• Following a material event: This is any event that could change your company’s value, such as a new round of funding, a secondary sale, or a significant pivot in your business model.

If your 409A valuation expires, any new options issued to U.S. employees will be non-compliant until a new 409A FMV is established. With Carta, it’s easier to stay compliant. We've integrated valuations directly into our equity management platform to make the process simple, accurate, and professional. Your cap table becomes a single source of truth, allowing our valuations experts to deliver an audit-defensible 409A valuation whenever you need.

The share plan document trap

Founders often attempt to save money on legal fees by using a “wrapper" to adapt their existing equity plan for the U.S. market. This is a high-risk shortcut: While these share plan documents may cover the basics, they frequently overlook U.S. federal securities laws and state-specific blue sky laws.

U.S. equity compliance is a complex and ongoing exercise. Every state has different requirements for how securities are registered or exempted. Australian startups with international compensation schemes should consult with a lawyer who specializes in U.S. tax and securities. Proactively addressing these compliance requirements can help to avoid unexpected costs or delays that may arise during a company exit.

Understanding the differences between ISOs and NSOs 

Australian companies may unintentionally promise U.S. employees incentives stock options (ISOs), when these employees are actually only eligible to receive non-qualified stock options (NSOs).

ISOs offer significant tax advantages for U.S. employees—such as no regular income tax liability at the time of exercise—but they come with strict requirements under the U.S. Internal Revenue Code (IRC). For example:

ISOs can generally only be issued to employees who are U.S. citizens or residents for tax purposes.

There is an $100,000 annual vesting limit on ISOs, and any options that exceed this threshold automatically become NSOs. Misclassifying equity grants can create unexpected tax burdens for employees further down the line, which can damage trust and lead to retention issues.

Build a scalable foundation for global expansion

While cross-border equity can be complicated, prioritising compliance at an early stage is essential for sustainable growth. Whether you continue to seek venture capital funding or start working towards an exit, your company’s cap table will be one of the first things investors and auditors investigate. If discovered, any non-compliant option grants or share plan documents can delay the due diligence process, invite further scrutiny during an audit, and incur significant financial penalties for your company and its employees.

Leveraging a digital cap table platform like Carta, with audit-ready valuations and equity compliance support, can help to ensure your ESOP remains a powerful incentive for attracting and retaining talent as you expand internationally.

Download a free sample 409A report

See what a best-practice 409A valuation report looks like, so you can issue equity compliantly to U.S. employees.