Optimal director salary when you can claim Employment Allowance

Most contractor tax guides treat the optimal director salary question as settled: pay yourself £12,570, use up the personal allowance, pay no income tax, and take the rest as dividends. For the majority of solo contractors, that remains correct. But there is an important exception: if your company qualifies for Employment Allowance, the maths changes materially — and the optimal salary can be significantly higher. This guide explains what Employment Allowance is, the conditions under which it applies (including the key gotcha for solo directors), and what the alternative salary breakpoints look like if you do qualify.

What is Employment Allowance?

Employment Allowance is a relief that allows eligible employers to reduce their employer National Insurance Contributions (NIC) bill by up to £10,500 per tax year (2026/27 rate). It was introduced in 2014 and has been increased several times, most recently to £10,500 in the April 2025 budget alongside the employer NI rate rise to 15%.

The allowance is claimed through your payroll software. HMRC credits it against your employer NI liability quarter by quarter. If your total employer NI bill for the year is less than £10,500, you simply don't pay any employer NI — you cannot receive the difference as cash.

The allowance is per company, not per employee. So a company with three employees all generating employer NI still only gets one £10,500 allowance.

The single-director-company exclusion — the key gotcha

Here is the critical point that trips up many contractors: Employment Allowance does not apply if the company's only employee is also a director.

HMRC's rule is precise. A company is excluded from Employment Allowance if:

• It has only one employee, AND
• That employee is also a director of the company.

This means that for the vast majority of UK contractors running a personal service company — where they are the sole director and the only person on the payroll — Employment Allowance is simply not available. Full stop.

This is the default position for solo contractors. If you are the only person your limited company pays, you cannot claim Employment Allowance, regardless of how much employer NI you pay on your own salary.

When Employment Allowance does apply

Employment Allowance applies to your company when it has at least one employee who is not a director and who is paid above the secondary NI threshold (£5,000 in 2026/27).

Common scenarios where contractor companies qualify:

1. A spouse or partner employed in the business — doing bookkeeping, marketing, administration, or other legitimate business functions — paid above £5,000/yr.
2. A second contractor employee — for example, a small agency or consultancy that has taken on one additional employee.
3. An administrative employee — a part-time PA, office manager, or other support role.

The employment must be genuine. HMRC can and does challenge spouse-on-payroll arrangements where there is no real work being done. The employment relationship should be commercially justified, the salary should be at market rate for the role, and records (timesheets, work product) should be kept.

How the maths changes when Employment Allowance applies

Without Employment Allowance, the reason to cap salary at £12,570 (rather than, say, £30,000) is that employer NI at 15% on the excess becomes a company cost that outweighs the corporation tax relief on the higher salary.

The rough break-even calculation without EA: for every £1 of additional director salary above £12,570:

• Company saves 25p in corporation tax (at the main rate)
• Company pays 15p in employer NI (on salary above £5,000 secondary threshold) — but this is also deductible, so the net corp tax cost of employer NI is 15p × 75% = 11.25p
• Director pays 20p–40p in income tax (depending on band), plus 8% employee NI at the marginal rate

Without EA, the numbers do not favour a substantially higher salary for most higher-rate taxpayers.

With Employment Allowance, the employer NI cost on the first £10,500 of the company's employer NI bill is wiped out. This changes the breakeven point.

For a director salary of approximately £42,000 (filling the basic rate band), the employer NI cost on the salary above £5,000 is:

• (£42,000 − £5,000) × 15% = £5,550 employer NI

If the company has Employment Allowance and no other employees generating employer NI, the entire £5,550 employer NI is offset by the allowance (£10,500 available, only £5,550 used). Net employer NI cost: £0.

At this salary:

• Director pays 20% income tax on (£42,000 − £12,570) = £29,430 × 20% = £5,886 income tax
• Director pays 8% employee NI on earnings between £12,570 and £50,270: (£42,000 − £12,570) × 8% = £2,354
• Company saves 25% corp tax on the full salary: £42,000 × 25% = £10,500 corp tax saving

Versus the £12,570 salary baseline:

• At £12,570: no income tax, no employee NI, no employer NI, corp tax saving = £12,570 × 25% = £3,143
• Difference in corp tax saving from higher salary: £10,500 − £3,143 = £7,357 more corp tax saved
• Additional personal tax: £5,886 + £2,354 = £8,240

The higher salary approach costs about £883 more in tax at this level with EA — but this does not account for the reduction in dividends needed (and therefore dividend tax saved). When you factor in that every £1 of additional salary that replaces a dividend saves the personal dividend tax rate on that £1:

• Basic-rate dividend tax saved: 10.75% on each pound redirected from dividend to salary
• On £29,430 of additional salary: saves £3,164 in basic-rate dividend tax

Net result at £42,000 salary with EA: approximately £2,000–£2,800 better off than the £12,570 baseline, depending on precise income level and whether the company uses all its EA against other employee NI.

For higher day-rate contractors filling the higher-rate dividend band, the employer NI cost at higher salaries eventually exceeds the EA buffer, so the optimum typically sits somewhere between £30,000 and £50,000 when EA is available.

Salaries up to ~£75K with Employment Allowance

For companies with a second employee generating substantial employer NI (say a well-paid spouse), the EA may be exhausted by that employee's NI before any of it offsets the director's salary NI. In that case, the director salary analysis reverts to the no-EA position.

However, if the company has EA available and relatively low other employer NI (e.g., a spouse earning £15,000/yr generating about £1,500 employer NI), the remaining EA of £9,000 can offset substantial director employer NI — pushing the breakeven to higher salary levels.

At a £75,000 director salary with £10,500 EA and no other employees:

• Employer NI: (£75,000 − £5,000) × 15% = £10,500 — exactly absorbed by EA
• Income tax and employee NI: significant, but corporation tax savings and dividend tax savings on the redirected income create a broadly neutral outcome at this specific level

In practice, the optimal salary point with full EA and no other employer NI usage is approximately £75,000–£80,000 — near the point where employer NI equals the allowance.

The spouse-on-payroll strategy

Employing a spouse or civil partner is a legitimate and widely used strategy for two reasons:

1. It creates a second employee on payroll, enabling Employment Allowance eligibility.
2. It splits income between two taxpayers, potentially keeping both within the basic rate band.

Conditions HMRC expects to be met:

• The spouse must actually perform real work for the business (admin, bookkeeping, marketing, client management — documented clearly).
• The salary must be commercially reasonable for the role (comparable to what you'd pay an unrelated person for the same work).
• The employment must be structured correctly (RTI payroll, employment contract, payslips, employer NI processed).
• The spouse must not be a director of the company (otherwise the single-director exclusion applies to them, and for EA purposes the question is whether the company has qualifying employees).

HMRC has challenged and won cases where spouse employment was clearly nominal. Keep records: timesheets, work product, and a written employment contract.

Honest assessment for solo contractors with no employees

For the majority of UK contractors — working as a one-person band, sole director, no spouse on payroll, no other employees — Employment Allowance is simply not available and this entire analysis is irrelevant.

Your optimal salary remains the standard £12,570 (using the personal allowance in full with no income tax, and paying employer NI of approximately £1,136/yr on salary above the secondary threshold).

The strategies above are worth knowing about if you are considering employing a spouse in a genuine capacity, or if your contracting business is growing and you are taking on employees. But do not employ someone nominally just to access Employment Allowance — HMRC scrutinises this, and the legal and reputational risk is not worth the tax saving.

Interplay with the April 2026 dividend tax rise

Post-April 2026, with dividend tax up 2pp, the case for paying a higher salary through the business has marginally strengthened — because every pound shifted from dividend to salary saves the new higher dividend tax rate (10.75% basic, 35.75% higher). This slightly improves the economics of higher salary strategies wherever employer NI cost is covered by Employment Allowance.

HMRC source

The Employment Allowance rules, eligibility conditions, and claim process are documented at gov.uk — Claim Employment Allowance.

The secondary NIC threshold (£5,000 in 2026/27) and employer NI rate (15%) are confirmed in HMRC's rates and allowances.

Try the numbers

Our director salary calculator lets you compare the standard salary breakpoints (£0, £6,708, £9,100, £12,570) and see their impact on your take-home. For scenarios involving Employment Allowance, use the contractor calculator and adjust the salary slider to see the full picture including corporation tax and dividend extraction.

Summary

Employment Allowance (£10,500/yr) is a powerful relief — but it is not available to companies whose only employee is also a director. Most solo contractors cannot claim it. If you have a genuine second employee (spouse or otherwise), the allowance can make higher director salaries (up to approximately £75K) tax-efficient by eliminating the employer NI cost. Before implementing a spouse-on-payroll arrangement, ensure the employment is genuine and commercially documented. This is an area where bespoke accountancy advice pays for itself.