RSU Tax UK: How Restricted Stock Units Are Taxed

RSUs, or Restricted Stock Units, have gained widespread popularity as a form of employee incentive in recent years. These employee share option schemes are particularly prevalent in multinational tech corporations, though they can also be found in banks and smaller enterprises, sometimes labelled under different terms.

A large number of our clients are based in the UK and they work for American listed companies from the UK. RSUs are part of their overall remuneration package. Dealing with RSU taxes can get complicated especially because there are no online tools due to the number of variables involved. Some platforms such as Morgan Stanley will help their US based customers with these complex calculations (WASH SALES). However, for UK based clients, the automatic calculations are not relevant and the UK rules and the tax calculations must be done manually. This often involves ignoring the calculations(gains/losses) done by brokers on their statements.

High earners often face a 60% tax rate due to losing personal allowances. At TaxQube, we implement strategies to reduce this burden, ensuring compliance and maximised savings.

What is an RSU?

An RSU essentially represents a type of share that comes with specific restrictions. For instance, it might lack voting rights upon grant or be contingent upon meeting certain predefined targets before the shares can be vested.

RSUs are granted to employees during significant milestones. Major tech giants such as Microsoft, Google, IBM and Nvidia etc. commonly offer RSUs to their employees as part of their compensation package. These units may also be allocated annually or contingent on the company’s performance. It’s important to note that RSUs share similarities with, yet remain distinct from, Company Share Schemes ESPP.

When dealing with RSUs, two critical dates come into play: the grant date and the vest date. The grant date marks the bestowal of the RSUs, while the vest date signifies when these units can be accessed and traded. Typically, RSUs mature in portions/tranches, rather than all at once, ensuring a gradual process of vesting over a set period of time.

In the context of UK taxation for individuals who are tax residents in the UK, RSUs can trigger tax liabilities on various occasions. Navigating the complexity of reporting these taxes and getting it right, especially when the CGT part is not managed by the employer, can be a challenging task.

This complexity can be further compounded if the individual received RSUs while working for the same company abroad, either prior to or after becoming a UK tax resident. These individuals may still be subject to taxes overseas even though they live in the UK.

Do I need to declare “sell to cover” RSU shares?

The simple answer is “yes”. Although these shares were automatically sold on your behalf by your broker, in the eyes of the taxman, you have “sold” shares. Therefore, you will treat them similar to how other shares are treated when you sell them from your brokerage account. You must report your share sales on a Self Assessment tax return if your total sale proceeds in the tax year are more than £50,000, or if your total gains are above the £3,000 annual exempt amount. Because of this, most people who receive RSUs now need to report their sales even if no tax is payable.

There is a common misconception that sell to cover shares do not need to be declared and we have seen many cases where these were left out of the tax reports. It is important to note that sell to cover shares are not likely to trigger a taxable gain because they are sold immediately and usually, the tax-free annual exemption is enough to cover any tax charges.

The tax-free annual exemption has been cut from £12,300 to just £3,000. Therefore, it is now more important than ever to keep track of sell to cover transactions. In some cases, we have seen that sell to cover transactions alone were able to trigger tax charges even though no other shares were sold. This usually happens when the share price changes significantly in a short period of time.

Are Capital Gains Taxes Applicable to RSUs?

RSUs are taxed as employment income when they vest, based on their market value on that date. That value becomes your base cost for Capital Gains Tax.

If you sell the shares immediately on vesting, there is usually little or no gain. If you hold them and they rise in value, the increase between the vesting date and the sale date is a capital gain. The annual exempt amount for Capital Gains Tax is £3,000 for 2026/27, down from £12,300 in 2022/23. Gains above this are taxed at 18% where they fall within your basic rate band, and 24% where they fall above it. These rates have applied to share disposals since 30 October 2024. Most RSU holders are higher or additional rate taxpayers, so in practice most of their gains are taxed at 24%.

If you hold shares from several vests, HMRC’s share matching rules decide which shares you have sold. Shares are matched first with any bought on the same day, then with any bought in the following 30 days, and finally with the pooled average cost of everything else you hold. This is why keeping accurate records of every vest and sale matters.

A notable point to consider is that, as per existing legislation, capital gains currently enjoy favourable tax treatment. The highest capital gains tax rate is 24%, notably lower than the 45% income tax rate (or 60% within the tax trap). Capital Gains Tax rates were last increased in October 2024, so it’s worth reviewing your position regularly in case the rules change again.

Methods to Reduce Capital Gains Tax on Your RSUs

Immediate Sale Upon Vesting

Opt for selling your shares as soon as they vest. This approach means little or no taxable gain is likely to arise. You would still need to carry out the calculations and reporting may still be required but it is unlikely that you will have to pay CGT on the disposal of shares.

Should you wish to continue holding the shares, consider selling them and repurchasing them within a stocks and shares ISA, up to the £20,000 annual limit. This gives tax free growth in the future, although US withholding taxes may still apply, especially if the shares are associated with a US company.

Alternatively, you can make a pension contribution and repurchase the shares within a Self Invested Personal Pension (SIPP). Investments in a SIPP grow free of UK tax, and US dividends are usually exempt from withholding tax provided your pension provider has the correct paperwork in place. Contributions must stay within your pension annual allowance, which is £60,000 for most people.

Share Transfer to Spouse

Transferring some of your vested shares to your spouse or civil partner can be worthwhile, especially if significant gains have built up since the shares vested. Transfers between spouses living together are made at no gain and no loss, so the transfer itself creates no tax. Your spouse can then sell the shares using their own £3,000 annual exemption, and if they are a basic rate taxpayer, part of the gain may be taxed at 18% rather than 24%. This effectively doubles the gains you can make as a couple before Capital Gains Tax applies.

Implementing these strategies can effectively reduce the impact of capital gains tax on your RSUs, allowing you to retain more of your gains.

For the majority, promptly selling their RSUs upon vesting is the wisest course of action. This decision not only prevents the accumulation of potential future capital gains tax liabilities but also mitigates risks in case unforeseen circumstances arise.

Owning shares in your company essentially means doubling down on your employer. Imagine receiving a cash bonus, would you instinctively choose to invest it in your company’s shares? If your answer leans towards a negative stance, then the logical step would be to divest your shares and consider alternative investment avenues. In essence, selling RSUs upon vesting is akin to safeguarding your financial portfolio and diversifying your investments beyond your company’s stock.

Tax on Grant of RSUs

RSUs do not incur taxation upon grant. The initial point of taxation arises during the vesting phase, triggering both income tax and National Insurance Contributions (NICs). Employers typically manage this through the PAYE system, simplifying the process for RSU recipients.

To settle the tax obligations, most setups involve your employer selling a portion of your vested shares to cover the due taxes. This coverage generally encompasses both employee and employer NICs. To facilitate this, you’ll be required to participate in a joint election with your employer. This election benefits both parties by establishing clarity on the NIC amount, and you, as the recipient, can claim income tax relief. This relief, factored into your PAYE calculations, usually negates the need for Capital Gains Tax during this phase.

If you have a history of working abroad and were granted RSUs prior to your UK arrival, gauging the UK tax liability could be intricate. There’s potential for overpayment, warranting a refund. Similarly, if you relocate internationally and continue to receive RSUs, an ongoing UK tax responsibility might persist for these units.

Even if you’ve always resided in the UK, the issuing company’s location might subject you to foreign tax deductions. However, you might not actually owe taxes in that foreign jurisdiction.

How are RSUs taxed?

If you’re seeking a UK RSU tax calculator, unfortunately, such a (reliable) tool doesn’t exist due to the number of variables involved. RSU taxation for UK employees is not a one-size-fits-all scenario. The specific tax implications hinge on your unique financial situation, your employer’s RSU arrangement, and the vesting schedule.

It’s crucial to note that RSUs aren’t subject to taxation upon issuance; tax obligations arise solely upon vesting. The UK’s RSU taxation aligns with the taxation of your regular income. Upon RSU vesting, you’ll be liable for income tax and employee national insurance contributions. Additionally, you might be required to cover employers’ national insurance contributions. This cost can be borne by your employer or shifted to you based on their discretion.

If you’re responsible for employers’ national insurance contributions, it’s important to subtract this amount from the RSU vesting value when calculating your income tax. Interestingly, when computing your employee’s national insurance, you don’t factor in the deduction of employer national insurance contributions.

Tax on Selling RSUs

The next point of consideration regarding UK taxes arises when you decide to sell the shares you currently possess. If the value of these shares has increased beyond the initial acquisition value, you’ll have a taxable gain. If this gain surpasses the available annual exemption, currently £3,000, you’ll pay Capital Gains Tax on the excess at 18% within the basic rate band or 24% above it. This gain is essentially the proceeds from the sale minus the original acquisition cost. Sounds straightforward, right? Unfortunately, dealing with RSUs adds a layer of complexity to this process, which your employer is unlikely to assist you with during this phase.

The complexity stems from the fact that shares are acquired at different times. Thus, when you eventually sell them, meticulous matching rules need to be applied to determine the specific shares that are being sold for taxation purposes. This is crucial for calculating the taxable gain and establishing the base cost. Given the varying values of shares at the time of each acquisition, multiple base costs might exist in theory. If the shares were obtained in a non-sterling currency, the consideration of exchange rates further compounds the intricacy.

While certain countries, like the US, follow a “first in, first out” approach for matching shares – a method often reflected in broker-prepared annual statements – the UK generally requires shares to be “pooled” with an average cost per share calculation. Yet, exceptions apply. For instance, if you sell shares and subsequently acquire more within 30 days, you’re deemed to have sold shares that weren’t even acquired at the time of the sale. This complexity can lead to inaccuracies in the figures provided by broker statements, potentially resulting in an incorrect tax assessment for UK purposes.

Given the complex nature of these rules and HMRC’s software limitations, it becomes crucial to comprehend the specific numbers and exchange rates to use when reporting gains from such disposals. Maintaining proper records from the outset is key to ensuring accuracy and avoiding mistakes. We work with a number of clients and maintain these share pools on their behalf.

How can I reduce tax on RSUs?

One effective strategy to minimise the tax burden on your RSUs involves contributing to your pension fund. This approach hinges on the principle that pension contributions lower your ‘adjusted net income,’ subsequently reducing your tax liability and potentially your overall tax rate.

The value of your RSUs is added to your income in the year they vest, which can push you over £100,000. Once your adjusted net income exceeds £100,000, you lose £1 of your £12,570 personal allowance for every £2 above that level. That gives an effective tax rate of 60% on income between £100,000 and £125,140, commonly known as the “60% tax trap”.

Personal pension contributions reduce your adjusted net income. For example, if your salary is £100,000 and £25,000 of RSUs vest during the year, your income rises to £125,000 and most of your personal allowance is lost. A gross pension contribution of £25,000 brings your adjusted net income back to £100,000, restores your full personal allowance, and gives you tax relief at an effective rate of up to 60%. The contribution must stay within your pension annual allowance.

Frequently asked questions about RSU tax

Q: When are RSUs taxed in the UK?
A: RSUs are not taxed when they are granted. They are taxed when they vest, as employment income, based on the market value of the shares on the vesting date. Income tax and National Insurance are normally collected through your payslip via PAYE.

Q: Do I need to file a tax return if my employer already taxed my RSUs through payroll?
A: Often yes. Payroll only deals with the income tax on vesting, not any later sale of the shares. You must report your share sales on a Self Assessment tax return if your total sale proceeds in the tax year are more than £50,000, or if your total gains are above the £3,000 annual exempt amount. Sell to cover sales count towards these limits.

Q: Can I use the gains shown on my broker statement?
A: Usually not. US brokers calculate gains in dollars using a “first in, first out” method, but the UK uses its own share matching rules, pooled average costs and sterling values. Broker figures often give the wrong UK gain, so the calculation needs to be redone using UK rules.

Q: What base cost do I use when I sell my RSU shares?
A: Your base cost is the market value of the shares on the date they vested, converted to sterling at the exchange rate on that date. This is the same value that was taxed as income, so you are not taxed twice on it.

Q: What Capital Gains Tax rate applies to RSU shares?
A: Gains above the £3,000 annual exempt amount are taxed at 18% where they fall within your basic rate band and 24% above it. Most RSU holders pay 24% on their gains.

Q: Can RSUs push me into the 60% tax trap?
A: Yes. The value of your RSUs is added to your income in the year they vest. If this takes your adjusted net income above £100,000, you start to lose your personal allowance, giving an effective tax rate of 60% on income between £100,000 and £125,140. Personal pension contributions can bring your income back below £100,000.

Q: Do RSUs affect Child Benefit and childcare support?
A: Yes. RSU income counts towards your adjusted net income. Above £60,000, the High Income Child Benefit Charge starts to apply, and above £100,000 you can lose Tax Free Childcare and free childcare hours. Timing pension contributions around your vesting dates can help protect these.

Q: What happens to my RSUs if I move abroad?
A: The UK can still tax RSUs that vest after you leave, based on the proportion of the vesting period you worked in the UK. The same applies in reverse if you arrive in the UK with unvested RSUs. This can lead to tax in two countries, so you may need to claim double tax relief.

Q: Can I offset losses on my RSU shares?
A: Yes. If you sell shares for less than their base cost, the loss can be set against other gains in the same tax year or carried forward to future years. Losses must be claimed within four years of the end of the tax year in which you made them.

Q: When is the tax return deadline?
A: The online Self Assessment deadline, and the deadline to pay any tax due, is 31 January following the end of the tax year. For example, sales made in the 2025/26 tax year must be reported and paid by 31 January 2027.

Appoint TaxQube to manage your RSU personal taxes

Being a regulated firm of specialist tax accountants, we are able to help you in dealing with your RSU tax affairs as well as submitting any pending tax reports on your behalf. We look after a large number of professionals from various industries. This is a complex area of tax and being a specialist, we even get referrals from other accounting and professional services firms to take care of RSU vesting, ESPP purchasing clients.

Unlike other firms, we do not charge anything from your tax savings which could be in thousands, you keep 100% of it. We help you maximise your tax savings as we have seen cases where people miss out by simply doing it themselves or by not using a tax specialist advisory firm like TaxQube.

We only charge a monthly retainer fee which gives you access to accredited tax advisers to help you manage your taxes and finances. Contact us for a free of charge initial consultation. Our services are suitable for you if your earnings are in excess of £70k a year.

We help high earners with RSUs stay compliant with HMRC. If you need help reporting your RSU income and capital gains on your Self Assessment tax return, please do feel free to get in touch with us by completing the contact us form.