The UK Sales Commission Guide: Tax, Plan Design, and Pay Mechanics

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This is the pillar guide to running sales commission in the UK. It covers how commission is taxed — PAYE, employee and employer National Insurance, and the bands that catch reps out — in our companion guide on how commission is taxed in the UK; how to design a scheme in our walkthrough of building a UK sales commission plan; the structures themselves in commission structures explained and the mechanics of accelerators, decelerators and clawbacks; and how it all rolls up to a credible number in our guide to setting OTE for UK sales roles. It then covers where commission collides with UK employment law — holiday pay, Statutory Maternity Pay and notice — and what an auditable, dispute-proof process actually looks like. Read it as the map; follow the links for the detail.

Most UK guides to sales commission are thinly-disguised US content with the dollar signs swapped for pounds. That gets you in trouble fast — UK National Insurance, holiday pay law, and Statutory Maternity Pay all behave differently to the US equivalents, and the cost of getting commission wrong here lands on the employer's payroll bill, not the rep's W-2. This guide is the version we wish existed when we started building Commit: a UK-specific walkthrough of how sales commission UK is taxed, how plans are designed, and where the legal edges sit.

TL;DR

UK sales commission is treated as ordinary earnings: it goes through PAYE, attracts employee National Insurance at 8% (between £242 and £967 per week) and 2% above that, and employer National Insurance at 15% above the £5,000-per-year Secondary Threshold (HMRC, 2025/26). Most UK B2B plans use a 70/30 or 80/20 base-to-variable split, with commission paid monthly or quarterly against deal-level or revenue-level targets. Commission paid regularly must be reflected in holiday pay (gov.uk holiday pay guidance) and counts toward Statutory Maternity Pay average weekly earnings (HMRC SMP guidance). The single biggest cause of disputes is not the plan itself but the absence of a written, auditable calculation trail.

What counts as sales commission in the UK?

In UK employment and tax terms, sales commission is one form of "performance-related pay" — a payment linked to measurable targets agreed between employer and employee (GOV.UK: Performance-related pay). HMRC does not draw a meaningful line between "commission" and "bonus" for tax purposes: both are earnings, both go through PAYE, and both attract Class 1 National Insurance.

Where the line matters is contractual. If commission is written into the contract of employment, non-payment is a breach of contract and can also be pursued as an unlawful deduction from wages under the Employment Rights Act 1996 (GOV.UK guidance). If a plan is described as "discretionary," UK case law still expects that discretion to be exercised rationally — "discretionary" is not a magic word that lets an employer refuse to pay earned commission on a whim.

How is sales commission taxed in the UK?

UK sales commission is taxed exactly like salary: it is added to the employee's gross pay for the period in which it is paid, and PAYE income tax and Class 1 National Insurance are deducted in the normal way.

For the 2025/26 tax year, the Personal Allowance is £12,570 and the income tax bands for England, Wales and Northern Ireland are 20% to £50,270, 40% to £125,140 and 45% above that (GOV.UK income tax rates). Scotland has its own bands. The Personal Allowance is tapered away at a rate of £1 for every £2 of adjusted net income above £100,000, which is why a single large quarterly commission payment can push a rep through a 60% effective marginal rate band — a calculation worth showing in any rep-facing payslip explainer.

Employee National Insurance for Category A in 2025/26 is 0% up to the £242-per-week Primary Threshold, 8% between £242.01 and £967, and 2% above £967 (HMRC NIC rates). A spiky commission month can briefly pull more of a rep's earnings into the 2% band, which is why reps sometimes notice the take-home percentage on a big commission cheque looks better than expected.

Employer National Insurance is the line finance teams forget. From 6 April 2025 the employer rate is 15% on all earnings above the Secondary Threshold of £5,000 per year (HMRC employer rates 2025/26). Every £100 of commission paid costs the employer an additional £15 in Class 1 secondary NICs, before pension and Apprenticeship Levy. Eligible employers can offset up to £10,500 a year through the Employment Allowance (same source), but most growing sales businesses exhaust that within the first few months of the tax year.

What does that look like on a real pay packet?

Take a £45,000 base, £15,000 OTE rep on a 70/30 split who hits target and earns £1,250 of commission in a month on top of £3,750 base. Their gross pay for the month is £5,000. Income tax, employee NIC and employer NIC apply on the same basis as any other £5,000 month — there is no special commission treatment. The employer cost is roughly £5,000 plus 15% employer NIC on earnings above the monthly Secondary Threshold (£417), so the loaded cost lands close to £5,690 before pension. Build that into your OTE modelling, not after it.

How are UK commission plans usually structured?

UK B2B sales commission plans cluster around a handful of patterns. The right commission plan design for your team depends on your sales cycle, deal size, and how tightly you can track individual attribution.

Comparison of UK commission plan structures

| Plan Structure | Base/Variable Split | Payment Frequency | Measurement Basis | Complexity | Best For | |---|---|---|---|---| | 70/30 monthly deal-based | 70% base / 30% variable | Monthly in arrears | Individual closed-won deals | Low — straightforward deal attribution and monthly visibility | Early-stage SaaS with sales cycles under 60 days and clear single-rep ownership | | 80/20 quarterly revenue-based | 80% base / 20% variable | Quarterly | Total revenue or ARR against quarterly quota | Medium — requires revenue tracking and fair splits for multi-touch deals | Scale-ups with complex buying committees and shared pipeline responsibility | | Tiered plan | 70/30 or 80/20 | Monthly or quarterly | Percentage of quota attained, with rates rising at defined thresholds (e.g. 0.5x up to 70%, 1x at 70–100%, 1.5x above 100%) | Medium — requires clear quota and attainment definitions | Teams with predictable monthly deal flow where you want to reward high performers without uncapped risk | | Accelerator plan | 70/30 or 80/20 | Monthly or quarterly | Standard rate up to 100% attainment, then 1.25x–2x multiplier above | Medium-high — risk of budget blow-out on mega deals | High-velocity environments where you want reps hunting upside, with clawback or cap clauses for outlier months | | Hybrid (base commission + SPIFs) | 70/30 core | Monthly core + ad-hoc bonuses | Core plan on revenue/ARR, SPIFs on strategic targets (new logos, specific products, quarterly push) | High — requires careful tracking of multiple incentive streams | Mature sales teams where you need flexibility to steer behaviour quarter-to-quarter without rewriting the core plan |

The table below summarises where each plan element typically breaks in practice.

The single most common mistake we see is importing a US 50/50 split into a UK plan without lifting the base. UK reps cannot rely on bonuses being lightly taxed the way some US states allow — every pound of variable pay is taxed at marginal rate. A rep who is genuinely living off variable income in the UK is also a rep whose mortgage application looks worse, whose holiday pay calculation gets harder, and whose first bad quarter triggers a resignation. For more on how commission structures interact with overall compensation strategy, see our guide on OTE UK benchmarks.

Where does commission interact with employment law?

Three pinch points matter for almost every UK sales team.

Holiday pay. Under the Working Time Regulations as interpreted in Lock v British Gas and subsequent cases, holiday pay for the four weeks derived from EU law must reflect "normal remuneration," which includes commission and bonuses "directly and intrinsically linked" to the work the worker performs (GOV.UK holiday pay guidance; EAT decision). For a commission-earning rep this means basing holiday pay on a representative reference period — commonly the previous 52 paid weeks — not on basic salary alone.

Statutory Maternity Pay. SMP is calculated from Average Weekly Earnings in the 8-week (or two-month) relevant period before the qualifying week. AWE "must include all earnings on which Class 1 National Insurance contributions are due" — which is to say, commission counts (HMRC SMP guidance). A rep whose biggest quarterly commission lands inside that reference window receives a meaningfully higher SMP entitlement than one whose did not. SMP itself is 90% of AWE for the first six weeks, then £187.18 or 90% of AWE if lower for the remaining 33 weeks (GOV.UK maternity pay).

Notice periods and garden leave. Whether a rep accrues commission on deals closing during notice depends almost entirely on plan wording. Silent plans tend to be read against the employer.

How should a UK sales team actually run commission?

The operational answer, regardless of tooling, is a small number of non-negotiables.

First, every rep should be able to see, in real time, the calculation behind every pound of their commission — the deal, the rate applied, the accelerator tier, and the expected pay date. Shadow spreadsheets exist because reps don't trust the official number; the cure is transparency, not better policing.

Second, the commission calculation needs an audit trail. When (not if) a dispute lands, you need to show what data the calculation used, who approved any overrides, and what changed. Spreadsheets fail this test the moment two people edit them. For teams struggling with disputed calculations, our guide to commission disputes walks through the common failure modes.

Third, the handoff to payroll should be a structured export rather than a copy-paste. We integrate with Xero for exactly this reason: commission lines flow through as additional gross earnings on the right pay run, with PAYE, NICs and pension applied automatically rather than reconstructed by hand. Read more about how commission integrates with Xero.

FAQ

Is commission taxed at a higher rate than salary in the UK?

No. UK sales commission is taxed as ordinary employment income through PAYE at the rep's marginal rate and attracts Class 1 National Insurance in the normal way (GOV.UK). A large commission payment can feel more heavily taxed because it pushes earnings into a higher band for that month, but the annual tax position is the same as if the same amount had been paid as salary.

Do employers pay National Insurance on commission?

Yes. Employers pay Class 1 Secondary NICs at 15% on commission above the £5,000 annual Secondary Threshold for 2025/26 (HMRC employer rates). Commission should be modelled with employer NIC loaded in when finance sets the comp budget.

Does commission count toward holiday pay in the UK?

For the four weeks of statutory leave derived from EU law, yes — holiday pay must reflect normal remuneration, including commission directly linked to the work (GOV.UK holiday pay guidance). The additional 1.6 weeks under UK law are treated differently unless the contract says otherwise.

Does commission affect Statutory Maternity Pay?

Yes. SMP is based on Average Weekly Earnings, which include all earnings subject to Class 1 NICs — commission included (HMRC SMP guidance). The timing of large commission payments inside the relevant 8-week reference period can change a rep's SMP entitlement.

Can an employer claw back commission that has already been paid?

Only if the contract or commission plan explicitly says so. Clawback is enforceable in the UK where it is clearly written, proportionate, and tied to a defined trigger (such as customer non-payment or rep-side fraud). The trickier question is the tax already paid by the rep — HMRC will normally allow an adjustment in the year the clawback occurs, but payroll teams should plan for the cash and timing mismatch.