The distinction between self-employed vs PAYE is rarely as clear as people assume, and HMRC’s view of where you sit can be very different from your own. It’s really quite common these days for people to have multiple income streams, so it’s important to understand the distinction between self-employed and PAYE and how this can affect your tax position.  

 

What is the difference between self-employed and PAYE? 

Under PAYE (Pay As You Earn), your employer deducts income tax and National Insurance contributions directly from your salary before it reaches you. You receive your net pay, HMRC receives the tax, and you generally have no further reporting obligation, unless you have other income sources. 

 

When you’re self-employed, none of that happens automatically. You are responsible for registering with HMRC, keeping records, reporting your income and expenses through Self-Assessment, and paying your own tax and National Insurance. You pay tax on your profits (your income after allowable business expenses) rather than gross earnings.  

 

The tax rates themselves are the same whichever route you take, but the National Insurance picture is different. Employees pay Class 1 NI at 8% on earnings between £12,570 and £50,270, deducted via payroll. Self-employed people pay Class 4 NI at 6% on profits within the same band. It’s a lower rate, but self-employed people don’t build up entitlement to statutory sick, maternity or parental pay the same way employees do. 

 

What HMRC actually looks at when assessing self-employed vs PAYE status 

Employment status for tax purposes is not simply a matter of what your contract says or how you prefer to describe yourself. We spoke recently to a contractor in Gravesend who was adamant he was self-employed – he invoiced his client monthly, worked from home most of the time, and had done so for years. When his client (a large private sector business) issued a Status Determination Statement saying he was inside IR35, he was genuinely shocked. The reality is that HMRC looks at the substance of a working arrangement, not the label put on it. 

 

The key tests include: 

• Control: does the client control how, when and where the work is done, or do you have genuine freedom in how you operate? 

• Substitution: can you send someone else to do the work in your place, or is the arrangement personal to you? 

• Mutuality of obligation: is there an ongoing expectation of work being offered and accepted, similar to an employment relationship? 

• Financial risk: do you bear the risk of a bad job, invest in your own equipment, or have the opportunity to profit from your work beyond a daily rate? 

 

HMRC’s Check Employment Status for Tax (CEST) tool is a useful starting point, and HMRC will stand by results produced by the tool provided the information entered is accurate. But the tool has its limitations and for complex arrangements it’s always worth taking professional advice. 

 

When working arrangements change 

Employment status is not fixed for life. It can change – and when it does, the tax consequences can catch people out. 

 

Moving from employment to self-employment 

If you leave a PAYE role to go freelance or start your own business, you need to register as self-employed with HMRC by 5 October in the tax year after the one in which you started trading. Miss that deadline and you risk a penalty. From that point, you’ll file an annual Self-Assessment return, report your profits, and pay your tax and Class 4 NI in January and July each year through payments on account.  

One thing many new sole traders don’t anticipate is the first-year tax bill. Because you pay tax in arrears, your first payment can cover a full year of tax plus 50% on account towards the following year – all in one go in January. Setting money aside from the moment you start trading is essential. 

Our blog on self-assessment payments on account explains how this works in practice. 

 

Taking on self-employed work alongside employment 

It’s perfectly possible to be both employed and self-employed at the same time  and it’s far more common than people realise. A teaching assistant who sells handmade goods online, a project manager who takes on weekend consultancy, a nurse who does private shifts through her own books: all of these people are operating in both worlds simultaneously. 

 

Your PAYE income is dealt with through your employer as usual, and your self-employed profits are reported separately via Self-Assessment. HMRC will consider your total National Insurance across both income streams and apply a cap if needed to avoid excessive contributions. 

The key is making sure you’re registered for Self-Assessment and reporting both income sources correctly. If you’re not sure whether your self-employed income needs to be declared, the answer is almost always yes once it exceeds £1,000 in a tax year – and it’s always better to ask than to guess. 

Contractors, IR35 and the off-payroll working rules 

If you work through your own limited company and provide services to a client, IR35 (also known as the off-payroll working rules) may come into play. These rules exist to prevent ‘disguised employment’: situations where someone is working in a way that is substantively the same as employment, but is structured as a limited company arrangement to pay less tax. 

For contracts with medium and large private sector clients, and all public sector bodies, it is the client’s responsibility to determine your employment status and issue a Status Determination Statement. If you are deemed to be inside IR35, income tax and employee NI are deducted before payment reaches your company, much like PAYE. You do not gain employment rights as a result though; the determination is for tax purposes only. 

For contracts with small private sector clients, the responsibility for determining status remains with your own company. Getting this wrong can be costly. 

 

Moving back into employment 

If you move from self-employment back into a PAYE role, you need to tell HMRC that your self-employment has ended. You’ll still need to file a Self-Assessment return for the tax year in which you stopped trading, and settle any outstanding tax. HMRC won’t simply stop expecting a return because you’ve taken a job. You need to formally deregister. 

 

What changes practically when you move between self-employed and PAYE 

Beyond the tax mechanics, the shift between self-employed and PAYE affects several other areas that are easy to overlook: 

• State pension entitlement: both employment and self-employment can build qualifying years towards your State Pension, but only if your earnings or profits are above the relevant threshold. Gaps in your NI record can be filled with voluntary contributions. 

• Statutory entitlements: employees are entitled to statutory sick pay, maternity/paternity pay and redundancy rights. Self-employed people are not. You may qualify for some contributory state benefits – things like Maternity Allowance or New Style ESA – depending on your NI record, but these are not automatic and are worth researching before you make any assumptions. 

• Mortgage applications: some lenders may require two to three years of accounts or tax returns for self-employed applicants. Moving between statuses at the wrong time can complicate things. 

• Making Tax Digital: from April 2026, sole traders and landlords with income over £50,000 must use MTD-compatible software and submit quarterly reports to HMRC. This is a significant change to how self-employed people report their income. 

 

Getting your employment status right matters 

The distinction between self-employed vs PAYE is rarely as simple as it looks, and HMRC takes a dim view of arrangements that don’t reflect the reality of how people work. At Adams Accountancy, we work with sole traders, contractors and limited company directors across Kent to make sure their tax affairs are set up correctly from the start. Call us on 01322 250001 or get in touch online for a free, no-obligation chat. No question is too silly. 

 

About the author 

Michelle Adams is a qualified accountant and director at Adams Accountancy, based in Dartford, Kent. With over 15 years of experience helping sole traders, contractors and limited company directors across Kent understand their tax obligations, Michelle and her all-female team specialise in making complex rules straightforward. Get in touch for a free consultation – no question is too small. 

 

Frequently asked questions 

How does HMRC decide if I’m self-employed or employed? 

HMRC looks at the substance of your working arrangement rather than what your contract calls you. The key factors are: 

• control (does the client direct how you work?),  

• substitution (can you send someone else?),  

• mutuality of obligation (is there an ongoing expectation of work?) and  

• financial risk (do you bear the cost of mistakes or invest in your own equipment?).  

You can use HMRC’s Check Employment Status for Tax tool to get an initial view, but for complex arrangements it’s worth speaking to an accountant before reaching a conclusion. 

 

Can I be employed and self-employed at the same time? 

Yes, and it’s more common than you might think. Many people hold a PAYE job while also running a small business or taking on freelance work on the side. Your employed income is handled through your employer’s payroll as usual, while your self-employed profits are reported separately via Self-Assessment. You’ll need to register for Self-Assessment if your self-employed income exceeds £1,000 in a tax year. HMRC will look at your total National Insurance contributions across both sources and apply a cap if you’ve overpaid. 

 

What happens if HMRC decides my self-employed arrangement is actually employment? 

If HMRC determines that a working arrangement constitutes disguised employment, either through an IR35 investigation or a general employment status enquiry, the consequences can include back-payment of income tax, employee and employer National Insurance, interest and penalties. The liability can fall on the individual, the client, or both, depending on the circumstances. This is why it’s important to assess status carefully at the outset of any arrangement, rather than waiting to see if HMRC raises questions. 

 

Do I need to tell HMRC when I stop being self-employed? 

Yes. You need to formally notify HMRC that your self-employment has ceased. This doesn’t happen automatically when you start a PAYE job. You’ll still be required to file a Self-Assessment return for the final tax year of self-employment and pay any outstanding tax. You can notify HMRC online through your Government Gateway account. Failing to do so can result in HMRC continuing to expect returns and issuing automatic penalties for non-filing, even if no tax is owed.