Umbrella employees and tax returns: Who needs to file, what to prepare, and why now is the time to start

Most umbrella company employees are paid through PAYE, so their tax and National Insurance is automatically deducted from their wages. For most, this means they do not need to complete a Self-Assessment tax return. 

However, there are some umbrella employees who may still need to file one. 

If you receive additional income, have more than one role, or have certain specific tax circumstances, you may still need to file a tax return with HMRC. Most taxpayers file online, so your practical deadline is 31st January following the end of the tax year. 

In this blog we explore: 

• When umbrella employees need to file a tax return 

• What you need to start preparing for now 

• Why now is the perfect time to make a start and get ahead of the deadlines 

• For many umbrella employees, they are taxed at source via PAYE and therefore will not need to complete a Self-Assessment  

• Some umbrella employees may still need to file a tax return if they have additional income or complex tax circumstances  

• Early preparation prevents errors, penalties, and January filing stress  

• Now is the ideal time to review your tax position and gather documents before peak season  

Umbrella company employees are usually classed as workers under PAYE. This therefore means: 

• Their income tax is deducted automatically  

• National Insurance is paid at source  

• The employer / umbrella company reports earnings directly to HMRC  

For most umbrella employees, this process removes the need for a Self-Assessment tax return. 

However, HMRC still requires some individuals to file a return depending on their wider financial situation. 

You may need to file a tax return if you have: 

• Additional untaxed income (such as rental income or dividends)  

• Multiple income sources not fully taxed through PAYE  

• High total earnings above £150,000 of PAYE income, that trigger reporting requirements (if unsure, check with HMRC whether you need to complete a Self-Assessment)  

• Tax relief claims or adjustments needed  

• A formal request from HMRC  

Even if your umbrella income is fully taxed, your wider financial profile determines whether Self-Assessment applies. If you are unsure whether this applies to you, the SG Umbrella team will be able to help. 

One common situation we see at SG is umbrella employees assuming they are fully covered by PAYE, only to later find additional income streams trigger a filing requirement. 

A typical example involves employees who: 

• Work through an umbrella for day-to-day contracts  

• Also receive rental income from a property  

• Or have small freelance side projects  

In many of these cases, employees will only realise they need to file when HMRC issues a notice, or when penalties start to apply. 

Early identification is key, which is why reviewing your full income picture before the end of the tax year is so important.

Unless you’re 100% sure you don’t need to file a Self-Assessment, you’ll need to start preparing early. 

Key things to prepare: 

• All your payslips from your umbrella company  

• Your P60 (end of tax year summary)  

• Details of any additional income sources  

• Expense records (travel, tools, professional costs)  

• HMRC Government Gateway login details  

Why this matters: 

• Prevents missing or incorrect income reporting  

• Ensures all allowable expenses are included  

• Reduces stress closer to the deadline  

• Helps identify whether you need to file  

June is commonly overlooked in the tax calendar as there aren’t any pressing deadlines, but it’s one of the most strategic months for financial planning. It’ll also save you the post festive headache if you prepare now rather than leave it to the last minute. 

Timing advantage 

By June: 

• The previous tax year data is fully available  

• Most P60s have been issued and must have been done so by 31st May, so you should have received yours by June 

• You have clarity on the total of your earnings  

Avoiding the January rush 

Waiting until January can lead to: 

• Delays in accounting support. Often teams can be supporting hundreds of employees during that time, so ensure you’re at the front of the queue by getting things sorted early 

• Higher risk of errors due to time pressure – especially if you’re missing vital information and need to chase 

• Missed opportunities for tax planning  

• Potential additional fees for rushed work 

Better financial control 

Starting early gives you time to: 

• Forecast potential tax liabilities  

• Set money aside if needed  

• Correct discrepancies early  

• Avoid unexpected HMRC surprises  

Whilst being an umbrella employee can simplify calculating and paying the tax you owe through PAYE, it does not completely remove the possibility of needing a Self-Assessment tax return. 

Understanding your wider financial position is essential, and the earlier you review it, the better prepared you will be. 

June is the ideal time to take stock, gather documents, and avoid last-minute stress later in the year. 

If you’re unsure whether you need to file a tax return, or want support reviewing your situation, our team is here to help. Simply get in touch to discuss your needs and how our team can help you.