NQSO meaning: What are non-qualified stock options?

UK employees — especially those working for US or international companies — may come across the term NQSO in their pay package or equity plan documents.

A Non-Qualified Stock Option (NQSO) is an employer-granted option that gives you the right to buy company shares at a fixed price (known as the strike price) for a set period of time.¹

You don’t own the shares until you exercise the option, and tax is usually due at that point.

In this guide, we explain what NQSOs are, how they work, and how they’re taxed in the UK.

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When investing, your capital is at risk. The value of your investments can go down as well as up and you may get back less than you put in. Tax treatment depends on your individual circumstances and may be subject to future change. The content of this article is provided for informational purposes only and is not intended to be, nor does it constitute, any form of personal advice.

Investments in a currency other than GBP are exposed to currency exchange risk. Currency exchange rates are constantly changing, which may affect the value of the investment in GBP terms. You could lose money in GBP even if the stock price rises in the currency of origin. Stocks listed on overseas exchanges may be subject to additional dealing and exchange rate charges, and may have other tax implications, and may not provide the same, or any, regulatory protection as in the UK.

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What is the meaning of an NQSO?

An NQSO is a type of stock option that can be granted not only to employees, but also to contractors or consultants.

They’re called “non-qualified” because, unlike certain US tax-advantaged options (such as ISOs), they don’t receive special tax treatment.

And unlike shares bought on the open market, you only actually own the shares once you exercise the option. Tax typically applies at that point — not when the option is granted.²

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How do NQSOs work?

Here’s how NQSOs typically work in practice:

Grant

You’re given stock options at a fixed price (the strike price), set at the time they’re granted.

Vesting

You’ll need to wait for a vesting period before you can exercise your options. This is often around four years, but varies by employer.

Exercise

Once vested, you can choose to buy the shares at the original strike price. You’ll usually have a set window to do this — often up to 10 years.²

Sale

After exercising, you can sell your shares through a brokerage or company plan provider.

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Common ways to exercise and sell

Once your options are vested, there are several ways you might handle them:³

• Cash exercise: Buy shares using your own money and hold them
• Exercise and sell (same day): Exercise and immediately sell all shares
• Exercise and hold: Buy shares and keep them for potential growth
• Sell-to-cover: Sell enough shares to cover costs and taxes, and keep the rest

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Who can receive NQSOs?

NQSOs are commonly given to employees as part of a compensation package, helping align employee incentives with company performance.

Unlike Incentive Stock Options (ISOs), which are generally limited to employees, NQSOs can also be granted to:

• Contractors
• Consultants
• Other non-employee contributors⁴

This makes them more flexible for companies, particularly those working with external talent.

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How are NQSOs taxed?

How NQSOs are taxed depends on when you exercise and sell the shares.

At exercise

When you exercise your NQSOs, the difference between the market value of the shares and the strike price is treated as employment income.

• Subject to Income Tax (typically 20%–45% depending on your income)⁶
• Often processed through payroll (for employees)

Payroll taxes

If you’re an employee, National Insurance contributions (NICs) may also apply at exercise.

At sale

If the share price increases after exercise, any additional gain is usually subject to Capital Gains Tax (CGT) when you sell.

• 18% for basic-rate taxpayers
• 24% for higher-rate taxpayers (after allowances)⁷

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Summary of tax treatment

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What happens when you sell NQSO shares?

Once your shares have vested and you’ve exercised your options, you can sell them through your brokerage or stock plan provider.

The process is usually straightforward:

• Choose how many shares to sell
• Confirm the transaction
• Receive the proceeds (minus any fees)

In the UK, you’ll generally need to report any capital gains through your self-assessment tax return.

Your broker may provide statements showing:

• Sale price
• Market value at exercise

These help calculate your Capital Gains Tax liability.

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Important things to consider

• You may pay Income Tax at exercise and CGT at sale — potentially in the same tax year
• The UK annual CGT allowance (around £3,000 for 2025/26) may reduce your taxable gains⁷
• Spreading sales across tax years may help you use the allowance more than once

If you receive proceeds in a foreign currency (such as USD), you may need to convert or transfer money internationally.

A Wise account lets you hold and convert multiple currencies using the mid-market exchange rate, with low and transparent fees.

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Receiving NQSO income internationally with Wise

After exercising and selling your NQSOs, you may receive proceeds from an overseas brokerage or employer — often in USD or another foreign currency.

With a Wise account, you can:

• Hold money in 40+ currencies
• Convert currencies at the mid-market exchange rate
• Avoid hidden foreign exchange markups
• Send and receive international payments easily

This can be useful if you’re paid in a foreign currency but spend in GBP, helping you manage conversions more efficiently.

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FAQs: NQSOs

Are NQSOs the same as shares in the UK?

No. NQSOs give you the right to buy shares in the future. You only own shares once you exercise the option.

Can UK employees receive NQSOs?

Yes. UK employees can receive NQSOs, typically from US or international employers. However, they are not tax-advantaged under UK rules.

Do NQSOs expire?

Yes. NQSOs usually have an expiry date and may lapse if not exercised within the allowed timeframe or after leaving the company.

What happens if I leave before exercising?

You’ll typically have a limited window (often around 90 days) to exercise vested options. Unvested options are usually forfeited.³

Can I sell shares immediately after exercising?

Yes. Once you own the shares, you can sell them. Capital Gains Tax may apply on any increase in value after exercise.

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Sources used:

1. Charles Schwab – NQSO Taxes: A Guide
2. Charles Schwab – Stock Options: NQSOs and ISOs
3. J.P. Morgan – Non-Qualified Stock Options: What’s the Deal?
4. Carta – Non-Qualified Stock Options (NSO)
5. Taylor Wessing – Taxation of UK Non-Favoured Share Options
6. GOV.UK – Income Tax Rates and Personal Allowances
7. GOV.UK – Capital Gains Tax Allowances

Sources last checked: 13 February 2026