New £2,000 cap on pension salary sacrifice set to affect hundreds of thousands of employers and millions of workers
Plans to restrict tax-free pension salary sacrifice will have wide-ranging consequences for UK employers and employees, with close to 300,000 businesses impacted and millions of workers facing higher National Insurance bills.
From 6 April 2029, employees will only be able to contribute up to £2,000 a year into pension salary sacrifice arrangements without incurring tax and National Insurance contributions (NICs). Contributions above that level will no longer benefit from full tax and NIC exemption. Around 290,000 employers currently operate salary sacrifice pension schemes that will be caught by the new rules.
The Treasury expects the change to reduce the cost of pension salary sacrifice tax relief by £4.7bn annually, delivering a significant boost to public finances.
At present, an estimated 7.7 million employees use salary sacrifice for pension saving. Government figures suggest that approximately 3.3 million of these individuals give up more than £2,000 of pay or bonuses each year, meaning around 44% of current users will be affected by the cap.
The remaining 4.3 million employees about 56% of those using salary sacrifice currently fall below the new threshold and will not be impacted immediately. However, concerns remain that inflation and frozen limits could gradually draw more savers into the charge over time.
Dominic Bourquin, partner at Monahans, said salary sacrifice has long been an effective way for workers to enhance retirement provision. He warned that once the cap is introduced, many employees will need to reassess their pension contributions and explore alternative strategies to keep their retirement plans on track.
New obligations for employers and employees
Under the proposed framework, employers will be required to calculate the portion of pension contributions that exceed the £2,000 allowance and pay Class 1 employer NICs on those amounts. They will also need to report this information to HMRC.
Employees affected by the cap will be liable for Class 1 primary NICs on any salary or bonuses sacrificed above the £2,000 limit. Government modelling suggests the average affected employee will pay an extra £84 in NICs during the first year of implementation, 2029–30.
Despite the changes being more than four years away, there is still little clarity on how complex arrangements will be treated. Outstanding questions include how bonuses will be handled, whether additional caps may apply, and how the rules will operate for individuals with multiple employments.
Jon Stride, chair of the Association of Taxation Technicians’ technical steering group, said both savers and employers face added complexity. Employees will need to weigh up whether pension contributions remain worthwhile once NICs apply, while employers may need to revisit benefit structures and renegotiate contractual arrangements.
He added that uncertainty remains around non-standard employment patterns, such as multiple jobs and irregular or discretionary payments.
Wider concerns over retirement saving
Industry experts have warned that reducing the tax efficiency of salary sacrifice risks discouraging pension saving at a time when the UK faces demographic pressures and increasing strain on the state pension system.
Rebecca Williams, divisional lead for financial planning at Rathbones, described the £2,000 cap as a heavy-handed measure that could undermine employer engagement with pensions and worsen the retirement savings gap. She said the change would add further costs to businesses already under pressure and weaken incentives to offer generous pension benefits.
She also noted that the cap could complicate tax planning for individuals seeking to keep income below £100,000, where personal allowance withdrawal and the loss of childcare support apply. While personal pension contributions remain an option, these often involve tax returns and additional interaction with HMRC.
The impact will not be limited to higher earners. Steve Hitchiner, chair of the tax group at the Society of Pensions Professionals, warned that the effective removal of salary sacrifice advantages would reduce take-home pay for millions of workers, particularly basic-rate taxpayers. He described the change as a de facto tax on work that would also impose significant costs on employers and reduce overall pension saving.
Costs to business and HMRC
HMRC estimates employers will collectively incur around £20m in one-off costs to update payroll systems, train staff and communicate the changes to employees. Ongoing compliance costs are projected at £30m a year, averaging £103 per employer, reflecting additional calculations and record-keeping requirements.
The policy note also confirms that employers continuing to use salary sacrifice arrangements will have to provide more detailed information to HMRC.
Implementation costs for HMRC itself are expected to be relatively modest, at around £1.9m, covering IT system updates, revised guidance and internal manuals. HMRC has also indicated it will use broader communication campaigns to ensure employers and employees are aware of the changes.
