Share schemes are no longer reserved for senior executives or start-ups. Increasingly, they form part of wider employee benefits packages, designed to attract, motivate, and retain talent. Yet many people don’t fully understand the differences between types of shares whether HMRC approved, unapproved, gifted, or purchased which can lead to confusion and mistakes right from the start.
From HMRC-approved plans to Restricted Stock Units (RSUs), these schemes give employees a valuable stake in the business without requiring an immediate cash outlay from the employer. However, these benefits come with challenges. Payroll teams must translate complex agreements into compliant calculations, while employers often underestimate the nuanced tax and National Insurance (NI) implications. Where payroll expertise is stretched or instructions are unclear, errors can creep in, creating compliance risks, dissatisfied employees, and reputational damage.
The most common pitfall arises when payroll teams follow employer instructions without question. An employer might request that £1,000 be entered as gross and then offset as net. On the surface, this appears straightforward but RSUs and other share-based awards are rarely simple.
The tax and NI treatment depends on the finer details of the scheme. Are the shares approved or unapproved? Were they gifted or purchased? Are they being sold to cover liabilities, or retained by the employee? Each scenario demands a different approach, and applying a one-size-fits-all process risks costly mistakes.
Another area of risk is the Section 431 election, which determines the timing of tax and NI liability whether it falls at grant or vesting. If shares are processed incorrectly, both the employer and employee may face unexpected costs, along with potential HMRC scrutiny.
"With share schemes, simple instructions can hide complex implications. Payroll must go beyond the numbers and look at the detail."
The Challenge: TechCo, a mid-sized software company with 450 employees, recently introduced an RSU scheme to boost retention. Payroll was instructed to treat the awards as gross pay for tax purposes. Confident the instructions were correct; the team processed the entries without consulting anyone else.
Two months later, several employees received pay slips showing unexpected tax deductions. The issue? The RSUs were partially approved under HMRC rules, meaning the Section 431 election could delay tax liability until vesting. Payroll had applied the wrong tax timing, leading to overpayments and employee frustration.
The Solution: Once the error was identified, TechCo took immediate corrective action:
Payroll paused further RSU processing and engaged a tax specialist.
All affected employees were notified, and adjustments were made to future pay runs.
Payroll implemented a peer review process for all share scheme entries.
Full scheme documentation was shared with payroll, and clear step-by-step guidance was created for processing approved and unapproved awards.
By treating share schemes as specialist transactions and fostering closer collaboration between payroll and tax experts, TechCo restored employee trust, avoided HMRC penalties, and created a repeatable process for future awards. Payroll now approaches share schemes with a “question first, process second” mindset, reducing risk and improving accuracy.
Key Takeaway: Even seemingly simple instructions can hide complex tax and NI implications. A structured process, peer review, and specialist guidance turn potential pitfalls into smooth, compliant operations.
So, how can employers and payroll professionals avoid these traps? The key is to treat share schemes as specialist transactions, not routine payroll items.
For payroll teams, this means stepping back from the figures provided to ensure they align with both the scheme’s design and HMRC rules. Employers must recognise that payroll may need to challenge instructions or request clarification before processing. Far from slowing things down, this safeguard protects against far greater disruption later.
Strong internal controls are essential. Peer review processes help catch mistakes before they reach HMRC, and collaboration with tax specialists ensures assumptions are validated. Employers should also support payroll teams by sharing full scheme documentation not just topline instructions, so employees are taxed correctly.
Documentation is another cornerstone of good practice. Every decision should be clearly recorded, along with the rationale behind it. This reduces the risk of error and provides a valuable audit trail should HMRC ever raise queries.
Peer review, and specialist guidance turn potential pitfalls into smooth, compliant operations.
Treat share schemes as specialist, not standard, payroll items
Encourage open dialogue between payroll, employers, and tax experts
Build in peer review for all share scheme entries
Document every decision and its rationale
Provide payroll with full scheme details, not just summary instructions
Errors in processing share schemes can have wide reaching consequences. For employees, incorrect tax treatment can reduce their expected reward and cause frustration. For employers, misreporting can lead to compliance penalties, reputational damage, and a breakdown of trust with staff.
Handled correctly, however, share schemes deliver real value. Employees gain a sense of ownership and alignment with business success, while employers strengthen retention and engagement. Payroll teams play a pivotal role in safeguarding compliance and ensuring these benefits are realised.
"Share schemes work best when payroll and employers see themselves as partners, not just processors and requesters."
Share schemes offer powerful opportunities for both employers and employees, but only if handled with care. Employers must recognise the complexity of these benefits, and payroll professionals must approach them with a specialist mindset, questioning assumptions and validating every step.
When employers and payroll teams work in partnership, supported by tax expertise and clear processes, share schemes can become a genuine win-win.
First published in Reward Strategy Magazine