National Insurance for Directors 2025/26: Complete Guide to Class 1, 2 and 4

National Insurance for company directors works differently from regular employees. As a director, your NI is calculated on an annual earnings period rather than weekly or monthly, which creates unique opportunities for tax planning - and unique traps if you get it wrong.

The key fact: Directors pay Class 1 National Insurance on salary, but NI doesn't apply to dividends. This is why the salary-plus-dividends strategy is so tax-efficient, and why understanding NI thresholds is essential for every UK limited company owner.

National Insurance Classes Explained

Not all National Insurance is the same. There are different classes, and as a director taking a salary, only certain ones apply to you.

Class 1: Employee's National Insurance

This is what you pay on your salary as a director. For 2025/26:

Key point: You pay no Employee's NI on earnings up to £12,570 (the Primary Threshold). Above this, you pay 8% on earnings between £12,570 and £50,270, then 2% on anything above that.

Class 1: Employer's National Insurance

Your company pays this on top of your salary. For 2025/26:

Critical change for 2025/26: The Secondary Threshold dropped from £9,100 to £5,000, and the rate increased from 13.8% to 15%. This significantly increases the cost of paying salary.

Class 1A: Benefits in Kind

If your company provides you with taxable benefits (company car, private medical insurance, etc.), the company pays Class 1A NI at 15% on the taxable value of those benefits. You don't pay NI on benefits - only the company does.

Class 1A is paid annually through the P11D(b) return, due by 22 July following the end of the tax year.

Class 2 and Class 4: Self-Employment NI

These classes apply to self-employed individuals and sole traders - not to directors taking a salary from their limited company. If you're a director receiving salary and dividends, Class 2 and Class 4 don't apply to you.

However, if you have self-employed income alongside your directorship (e.g., freelance work outside the company), you may pay Class 2 and Class 4 on that separate income.

Bottom line: As a director taking salary from your limited company, focus on Class 1 (Employee's and Employer's) and Class 1A if you receive benefits.

The Director's Annual Earnings Period

Here's where directors differ from regular employees, and it's crucial to understand.

How Normal Employees Are Calculated

Regular employees have their NI calculated on each pay period (weekly or monthly). If an employee earns £2,000 in January and £0 in February, they pay NI on the £2,000 in January based on the monthly threshold.

How Directors Are Calculated

Directors use an annual earnings period. Your NI is calculated on your total earnings for the entire tax year, regardless of when you receive them. HMRC then applies a cumulative calculation to true up your NI throughout the year.

This means:

• Bunched payments work: You can take your entire annual salary in one month and pay the same NI as if you took it monthly
• Year-end bonuses: Taking a large bonus in March doesn't trigger extra NI if your annual total stays below thresholds
• Irregular cash flow: You can align salary payments with company cash flow without NI penalties

Practical Example

Regular employee approach: If you paid yourself £12,570 in month 12 only, a regular employee would have £12,570 compared against one month's threshold (£1,047.50), triggering NI on the excess.

Director approach: Your £12,570 is compared against the full annual threshold (£12,570), resulting in zero Employee's NI - even though you took it all in one payment.

Why This Matters for Year-End Planning

Many directors take a minimal salary throughout the year, then review their position near 5 April. If profits allow, they can take additional salary or dividends. The annual earnings period means you can take a year-end salary top-up without the NI complications that would affect regular employees.

2025/26 NI Thresholds and Rates

Here's the complete picture for the 2025/26 tax year:

Employee's National Insurance (Class 1 Primary)

Employer's National Insurance (Class 1 Secondary)

Key Changes from 2024/25

The combined effect is higher Employer's NI costs for most directors, partially offset by the increased Employment Allowance for those who qualify.

Optimal Salary for NI: Finding the Sweet Spot

The goal is to minimise total NI while still achieving your tax and pension objectives. Here are the key salary points to consider:

Option 1: £12,570 (Primary Threshold)

This is the most popular choice for directors. At £12,570:

Advantages:

• Zero Employee's NI
• Uses full Personal Allowance (zero Income Tax)
• Qualifies for State Pension credits
• Corporation Tax relief of £3,142.50 (at 25% rate)

Net position: The CT relief (£3,142.50) exceeds the Employer's NI cost (£1,135.50), making the salary effectively tax-negative.

Option 2: £9,100 (Old Secondary Threshold)

Before April 2025, £9,100 avoided both Employee's and Employer's NI. This no longer works - Employer's NI now applies above £5,000.

The trade-off: You save £520.50 in Employer's NI compared to £12,570, but you lose £869.25 in Corporation Tax relief (the difference in salary x 25%). This makes £9,100 worse than £12,570 for most directors.

Option 3: £6,725 (Lower Earnings Limit)

The minimum salary to earn a State Pension qualifying year:

When this makes sense:

• You're a higher/additional rate taxpayer on other income
• You have multiple directorships (see below)
• You want to minimise all costs and don't mind missing Personal Allowance utilisation

Option 4: £5,000 (Secondary Threshold)

At exactly £5,000, you pay zero NI of any kind:

Warning: A salary of £5,000 falls below the Lower Earnings Limit (£6,725), so you don't earn a State Pension qualifying year. Over a 35-year career, this could cost you significant retirement income.

Summary: Which Salary Level?

For most directors, £12,570 remains the optimal salary despite the increased Employer's NI costs. The Corporation Tax relief more than compensates. See our detailed director's salary guide for full calculations.

Employer's National Insurance: The Hidden Cost

Many directors focus on Employee's NI but forget about Employer's NI. This is a mistake - from April 2025, Employer's NI is a significant business cost.

The Numbers for 2025/26

For every £1 of salary above £5,000, your company pays 15p in Employer's NI. There's no upper limit - unlike Employee's NI (which drops to 2% above £50,270), Employer's NI stays at 15% indefinitely.

Example: Different salary levels

Employment Allowance: Who Qualifies?

Employment Allowance can reduce your Employer's NI bill by up to £10,500 for 2025/26. This is a significant increase from £5,000 in 2024/25.

You CAN claim if:

• You have at least one employee (other than yourself as sole director) earning above £5,000
• Your Employer's NI bill in the previous tax year was under £100,000
• You employ multiple directors and at least one has another employee

You CANNOT claim if:

• You're a sole director with no other employees
• All your employees (including you) are directors of companies with no other employees
• Your company's primary business is providing personal services (certain IR35 scenarios)

Employment Allowance Example

Scenario: Director plus one part-time employee

With Employment Allowance, both the director and employee can take salaries without any Employer's NI cost - a saving of £2,635.50.

National Insurance and Dividends

Here's the most important NI planning point for directors: dividends are not subject to National Insurance.

Why This Matters

Compare the NI treatment of £10,000 extracted as salary versus dividends:

Taking £10,000 as dividends instead of salary saves £2,300 in NI alone. This is why the salary-plus-dividends strategy is so tax-efficient for directors.

The Optimal Mix

For most directors, the optimal extraction strategy is:

1. Salary of £12,570 - Uses Personal Allowance, earns State Pension credit, zero Employee's NI
2. Dividends for the rest - No NI, taxed at dividend rates (8.75%/33.75%/39.35%)

This approach minimises overall tax while maintaining employment benefits. See our complete salary vs dividends guide for detailed calculations at different profit levels.

Multiple Directorships

If you're a director of more than one company, NI rules become more complex.

Employer's NI: No Annual Maximum

Each company pays Employer's NI independently. There's no cap or sharing of thresholds between companies.

Example: You're a director of two companies, each paying you £12,570:

Both companies pay full Employer's NI - there's no sharing of the Secondary Threshold.

Employee's NI: Deferment Available

Your Employee's NI position is different. If your combined earnings exceed the Upper Earnings Limit (£50,270), you may be paying too much Employee's NI.

The problem: Each employment calculates NI independently. If both pay you £30,000:

But if you had one job at £60,000, your NI would be:

• 8% on £12,570 to £50,270 = £3,016
• 2% on £50,270 to £60,000 = £194.60
• Total: £3,210.60

Wait - that's higher. So multiple directorships can sometimes work in your favour for Employee's NI.

However, if both salaries push you well above the Upper Earnings Limit, you might overpay. In these cases, you can apply to HMRC for NI deferment on one or more employments.

Deferment Application

Apply for deferment using form CA72A before the start of the tax year. HMRC will review your expected earnings and potentially reduce NI deductions at source, with a year-end reconciliation.

State Pension Implications

National Insurance contributions build your State Pension entitlement. As a director, you need to understand the minimum requirements.

Qualifying Years

You need 35 qualifying years of NI contributions for the full State Pension (£221.20 per week in 2024/25). A minimum of 10 years gives you any State Pension at all.

Minimum Earnings for a Qualifying Year

Key point: You earn a qualifying year if your earnings are between £6,725 and £12,570, even though you pay zero Employee's NI in this band. This is why the £12,570 salary is so attractive - you get State Pension credit without paying NI.

Checking Your NI Record

You can check your National Insurance record and State Pension forecast at gov.uk/check-national-insurance-record. Look for:

• Total qualifying years
• Any gaps you could fill
• Projected State Pension amount

If you have gaps from years with low or no salary, you may be able to pay voluntary Class 3 contributions to fill them. Use our salary calculator to model the long-term value of different salary levels.

How AccountsOS Helps with NI Planning

Managing National Insurance across salary, benefits, and multiple income sources is complex. AccountsOS automates the entire process:

Automated Calculations

• Real-time NI modelling based on your actual salary and dividend payments
• Threshold monitoring with alerts when approaching key limits
• Employment Allowance tracking with automatic eligibility checking

Payroll Integration

• RTI submissions handled automatically for each salary payment
• P11D tracking for benefits in kind and Class 1A calculations
• Year-end reconciliation of director's annual earnings period

Plain English Guidance

Ask questions like:

• "How much NI will I pay on a £20,000 salary?"
• "Should I increase my salary for State Pension purposes?"
• "What's my total NI cost including employer's contributions?"

AccountsOS analyses your financial data and provides instant, personalised answers. Learn more about how it works.

Frequently Asked Questions

Do directors pay National Insurance on dividends?

No. Dividends are not subject to National Insurance - neither Employee's NI nor Employer's NI. This is one of the main reasons the salary-plus-dividends extraction strategy is so tax-efficient for UK limited company directors.

What is the annual earnings period for directors?

Unlike regular employees who have NI calculated per pay period, directors use an annual earnings period. Your NI is calculated on total earnings for the tax year (6 April to 5 April), regardless of when payments are made. This allows flexibility in salary timing without NI penalties.

What salary should I take to avoid paying Employee's NI?

Keep your salary at or below £12,570 (the Primary Threshold) to pay zero Employee's NI. At this level, you also pay zero Income Tax, earn State Pension credits, and your company gets Corporation Tax relief on the salary.

Does my company pay NI on my salary even if I don't?

Yes. Employer's NI applies on salary above £5,000 at 15%, regardless of whether you pay Employee's NI. On a £12,570 salary, your company pays £1,135.50 in Employer's NI even though you pay nothing.

Can I claim Employment Allowance as a sole director?

No. Employment Allowance requires you to have at least one employee (other than yourself as sole director) earning above the Secondary Threshold. Sole directors without other employees cannot claim.

Do I pay Class 2 or Class 4 NI as a director?

No. Class 2 and Class 4 apply only to self-employed individuals, not to directors receiving salary from their limited company. You pay Class 1 (Employee's and Employer's) on your director's salary.

How much salary do I need for a State Pension qualifying year?

You need earnings of at least £6,725 (the Lower Earnings Limit) to earn a qualifying year. At this level, you pay zero Employee's NI but still get the State Pension credit. Taking salary of £12,570 easily exceeds this requirement.

What happens if I'm a director of multiple companies?

Each company calculates Employer's NI independently - there's no sharing of thresholds. For Employee's NI, if your combined earnings exceed the Upper Earnings Limit, you may want to apply for NI deferment to avoid overpaying.

Conclusion

National Insurance for directors is more complex than for regular employees, but understanding the rules creates real tax planning opportunities.

The key takeaways:

1. Annual earnings period - Directors have NI calculated annually, allowing flexible salary timing
2. £12,570 optimal salary - Zero Employee's NI, State Pension credit, and CT relief exceeds Employer's NI cost
3. Dividends are NI-free - The main reason salary-plus-dividends beats salary-only extraction
4. Employer's NI is 15% - Don't forget this cost when planning salary levels
5. Employment Allowance - Worth up to £10,500 if you have employees beyond yourself

For most directors, the simple strategy remains: take £12,570 as salary, then extract remaining profits as dividends. This minimises NI while maintaining State Pension credits and Corporation Tax relief.

Use our salary calculator to model your specific situation, or see our detailed guides on optimal director's salary and salary vs dividends for complete calculations.

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