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Understanding the rules around National Insurance contributions can be tricky, especially when you’re juggling multiple employment contracts or running a business alongside employment. One option that’s sometimes overlooked is the possibility of deferring Class 1 National Insurance contributions, which could help you manage cash flow during specific periods of the tax year. We’ll walk you through how this works and whether it might be right for your situation.

What is Class 1 National Insurance deferral?

Class 1 National Insurance contributions are the regular payments made by employees and employers based on earnings. Deferral is a formal arrangement that allows you to postpone paying these contributions for a set period, rather than paying them in the normal way throughout the tax year.

HMRC recognises deferral as a legitimate option in certain circumstances, but it’s not automatic – you need to apply and meet specific criteria. The key point is that you’re not avoiding the contributions; you’re simply moving when you pay them. Any deferred contributions still need to be paid, typically by January 31st of the following tax year.

This is different from deferring tax itself, and it’s crucial not to confuse the two. Your employer may still be required to operate PAYE, and your tax liabilities remain unchanged.

Who can defer and why might you need to?

Deferral is most commonly relevant if you’re a higher earner with multiple jobs or sources of income. The most typical scenario involves someone who will exceed the annual National Insurance threshold across several employments, meaning they’d potentially pay more contributions than necessary if they paid in full at each job.

For the 2024/25 tax year, the employee National Insurance threshold is £12,570 per annum. Once you’ve paid contributions on earnings up to this point across all your employments combined, any further contributions in the same tax year may be unnecessary if your total earnings are predictable.

Another scenario is if you have secondary employment that’s temporary or seasonal. If you know your second job will only run for part of the year, deferral of contributions on that employment might make sense from a cash flow perspective.

Self-employed individuals cannot defer Class 2 or Class 4 National Insurance in the same way, as these work on a different basis, but employees and employers paying Class 1 can apply.

How to apply for deferral

The process begins by contacting HMRC’s National Insurance contributions and employer office. You’ll need to complete an application explaining your circumstances – why you need deferral and for how long. HMRC will review your request based on the information provided.

You must apply before the deferral period begins, not afterwards. HMRC typically requires reasonable notice, so don’t leave it until the last minute. Once approved, you’ll receive a deferral notice setting out the exact period covered and any conditions attached.

It’s important to note that approval isn’t guaranteed. HMRC will consider whether your application meets their guidelines, which generally require that deferral is necessary to avoid over-contribution and that you have the ability to pay the deferred amount later.

Managing deferred contributions

Once your deferral is in place, ensure your payroll records clearly reflect it. Your employer needs to know that contributions should not be collected during the deferral period, and this should be properly documented on your payslips.

Keep detailed records of the amount deferred. You’ll need to settle this by 31st January following the end of the tax year. Failure to do so could result in interest and penalties, so treat deferred contributions seriously – they’re not written off, merely postponed.

If your circumstances change during the tax year – for instance, you earn significantly less than expected – contact HMRC to discuss implications. Similarly, if you change jobs, make sure your new employer is aware of any ongoing deferral arrangements.

Is deferral right for you?

Deferral can ease cash flow pressures, particularly if you’re in the early stages of building multiple income streams or managing an unpredictable employment situation. However, it’s only beneficial if you genuinely have over-contributed and if you’re confident you can meet the full liability when it falls due.

For most straightforward single-employment situations, deferral won’t be necessary. But if you’re navigating complex employment arrangements or significant earnings volatility, it’s worth exploring.

For tailored advice on whether deferral is appropriate for your circumstances – and to help you navigate the application process – contact Severn Accounting. We’re here to help.