As a self-employed individual in the UK, understanding National Insurance contributions (NICs) is essential for managing your tax obligations. National Insurance (NI) plays a key role in funding benefits like the State Pension. Reforms introduced in 2024 have changed the rules for self-employed NICs, making it more critical than ever to stay informed.
In this guide, we’ll walk you through everything you need to know about self-employed National Insurance for the 2025/26 tax year. From how much you pay to how it affects your State Pension, we’ll break down the changes and provide practical examples.
What is National Insurance?
National Insurance is a tax paid by workers and employers in the UK to fund state benefits like the State Pension and Jobseeker’s Allowance. For employees, National Insurance contributions are deducted automatically from their wages through PAYE (Pay As You Earn). But if you’re self-employed, you’re responsible for calculating and paying your contributions, usually through Self Assessment.
For the self-employed, there are two main types of NICs: Class 2 and Class 4. These contributions help you qualify for benefits and build your National Insurance record, which is crucial for your State Pension. Recent changes have simplified some aspects of the system, but there are still important thresholds and rules to understand.
Major Reforms to Self-Employed NICs in 2024
Significant changes to self-employed National Insurance were introduced following the 2023 Autumn Statement. These reforms aim to reduce the tax burden on self-employed workers while maintaining access to benefits like the State Pension. Here’s what you need to know:
- Abolition of mandatory Class 2 contributions: If your profits are above the Small Profits Threshold (£6,845 in 2025/26) or more, you’re automatically credited with Class 2 NIC without needing to pay. This ensures you continue to build qualifying years for the State Pension.
- Voluntary contributions for low earners: If your profits are below the Small Profits Threshold, you can choose to pay voluntary Class 2 contributions at £3.50 per week (£182.00 per year) to protect your National Insurance record.
- Class 4 rate reduction: The main rate for Class 4 NIC has dropped. The current rate in 2025 - 2026 is 6% on profits between £12,570 and £50,270, with 2% on profits above £50,270.
These changes simplify the system but also require careful planning to ensure you’re either automatically credited or making voluntary contributions when necessary. We will now explore each class in detail.
Class 2 NIC: What You Need to Know
Class 2 NIC was previously a flat-rate contribution paid by self-employed individuals to qualify for benefits like the State Pension. However, from 6 April 2024, mandatory payments have been abolished for most people. Here’s how it works now:
- If your profits are above the Small Profits Threshold (£6,845 in 2025 - 2026, £6,725 in 2024 - 2025) or more, you will be automatically credited with a qualifying year for your State Pension.
- You don’t automatically qualify for credits if your profits are below the Small Profits Threshold. You can voluntarily pay Class 2 national insurance contributions at £3.50 per week (£182.00 per year) to maintain your National Insurance record.
Voluntary contributions can be important if you’re earning below the threshold but want to ensure you have enough qualifying years for the full State Pension. You can check your National Insurance record here to see if you have any gaps.
Class 2 NI Example 2025/26: Low-Income Self-Employed Worker
- Profits: £5,000 (below £6,845)
- Class 2 NIC: Not automatically credited
- Action: Can pay voluntary Class 2 NICs of £3.50 per week (£182.00 per year) to secure a qualifying year for the State Pension.
Class 2 NI Example 2025/26: Mid-Income Self-Employed Worker
- Profits: £10,000 (above Class 2 NI Small Profits Threshold of £6,845, but below Class 4 NI Lower Profits Limit of £12,570)
- Class 2 NIC: Automatically credited (no payment required)
- Class 4 NIC: No liability (profits below £12,570)
Class 4 NIC: Rates and Thresholds
Class 4 NIC is a profit-based contribution self-employed individuals pay on earnings above a certain threshold. Unlike Class 2 NIC, which is a flat rate, Class 4 NIC is calculated as a percentage of your profits.
Current (2025 - 2026) National Insurance rates for Class 4 NIC are:
- 6% on profits between £12,570 and £50,270
- 2% on profits above £50,270
Class 4 NI Calculation Example 2025/26: High-Income Self-Employed Worker
- Profits: £60,000
- Class 4 NIC Calculation:
| 6% on profits between £12,570 and £50,270 | (£50,270 – £12,570) x 6% | £2,262.00 |
| 2% on profits above £50,270 | (£60,000 – £50,270) x 2% | £194.60 |
| Total Class 4 NIC | £2,456.60 |
Registering for Class 2 and Class 4 NIC
If you’re self-employed, you must register with HMRC. This registration covers both income tax and National Insurance. You can register online.
Once registered, you’ll need to file a Self Assessment tax return each year, through which you’ll pay your Class 4 NIC and any income tax due. Class 2 NIC, if applicable, is also managed through Self Assessment, though it’s now automatically credited for most people.
Key Dates for Self Assessment – 2025/26 Returns
- January 31, 2027: Deadline for online tax returns and payments
- October 31, 2026: Deadline for paper tax returns
Paying Class 2 and Class 4 NIC
Most self-employed individuals pay National Insurance contributions through the Self Assessment system. Here’s how it works:
- Class 4 National Insurance: Calculated automatically based on your profits and included in your Self Assessment tax bill.
- Class 2 National Insurance: If you must pay voluntary Class 2 contributions (e.g. if your profits are below the Small Profits Threshold), you can arrange payment through Self Assessment or by contacting HMRC directly.
How Much You Pay: A Comparison of NIC Classes
To help you better understand the differences between the various classes of National Insurance contributions, here’s a quick comparison:
| Class | Who Pays | Rate (2025/26) | Information |
|---|---|---|---|
| Class 1 | Employees & Employers | 8% (employees), 15% (employers) | For state benefits, including the State Pension |
| Class 2 | Self-employed | £3.50/week (voluntary) | Qualifying for State Pension and benefits |
| Class 3 | Voluntary (anyone) | £17.75/week | Filling gaps in National Insurance record |
| Class 4 | Self-employed | 6% on profits £12,570-£50,270; 2% above | Contribution based on profits |
This table highlights the key differences between employed and self-employed National Insurance. Employees pay higher rates, but self-employed workers have lower rates to reflect their lack of self-employment rights and benefits.
Voluntary Contributions: When and Why to Pay
Voluntary National Insurance contributions can be a crucial tool for self-employed individuals who want to ensure they qualify for the full State Pension. If your profits are below £6,845 in 2025 - 2026, or if you have gaps in your National Insurance record, paying voluntary Class 2 NICs (£3.50 per week) is a cost-effective way to secure a qualifying year.
Alternatively, you can pay Class 3 voluntary contributions at a higher rate of £17.75 per week, but this is generally less advantageous for self-employed individuals unless they’re ineligible for Class 2 NIC.
To check your National Insurance record and see if you have any gaps, you can use the GOV.UK National Insurance record checker.
State Pension and Self-Employed NICs
The State Pension is a benefit you get from paying National Insurance contributions. You need 35 years of contributions to your National Insurance record to receive the full State Pension. Each year you’re credited with Class 2 NIC counts as one of these years. You’ll get this credit automatically if your profits are £6,845 or more, or you can pay voluntary contributions if your profits are lower.
You’ll receive a reduced pension if you have fewer than 35 qualifying years. The State Pension age is currently 66. You can check your State Pension forecast here.
Key Takeaways for Self-Employed Individuals
- Automatic Credits: If your profits are £6,845 or more, you automatically qualify for Class 2 NIC credits without payment.
- Voluntary Payments: If your profits are below £6,845, consider paying voluntary Class 2 NICs to protect your State Pension entitlement.
- Class 4 NICs: Pay 6% on profits between £12,570 and £50,270, and 2% on profits above that.
- Self Assessment: Register with HMRC and file your tax return by 31 January each year to pay your NICs and income tax.
- Check Your Record: Regularly review your National Insurance record to ensure you have enough qualifying years for the State Pension.
Calculate Your Income Tax and National Insurance
How do these rates apply to your specific situation? To help you get a clearer picture, we’ve included a tax calculator designed specifically for self-employed individuals. This tool estimates your income tax and National Insurance contributions (Class 4 NICs and any potential voluntary Class 2 NICs) based on your annual profits for the 2025/26 tax year.
How to Use the Calculator
- Enter your total annual profits (before tax) into the calculator.
- The tool automatically applies the current National Insurance rates (6% on profits between £12,570 and £50,270, and 2% above £50,270) and the relevant income tax bands.
- Review the results to see a breakdown of your estimated Class 4 NICs, income tax, and whether you might need to consider voluntary Class 2 contributions if your profits are below £6,845.
What It Calculates
The calculator provides an estimate of:
- Class 4 NICs: Based on your profits and the rates outlined above.
- Income Tax: Calculated using the UK’s personal allowance (£12,570 for 2025/26) and tax bands (20%, 40%, or 45%, depending on your income).
- Total Tax Liability: A combined figure to help you plan your finances.
Important Note
While this calculator is a fantastic starting point for understanding your tax obligations, it’s a simplified tool. It doesn’t account for all personal circumstances, such as additional income sources, deductions, or specific allowances. For a full assessment, especially if your situation is complex, it’s always a good idea to consult a tax expert such as U&W.
Conclusion
Figuring out self-employed National Insurance might feel tricky, but getting a handle on the latest changes is essential for keeping your taxes in check and planning.
The rules have shifted recently: mandatory Class 2 contributions are gone, and Class 4 rates are lower, which means less tax for the self-employed. That said, you need to keep an eye on your profits to ensure you either get automatic credits or pay voluntary contributions to protect your State Pension.
Staying on top of things can help you make the most of these updates and set yourself up nicely for the future. If you are unsure about something, chat with one of our tax experts.
