HR and payroll for ecommerce in the United Kingdom
Reviewed by Mellow Editorial Team, HR & payroll content team
Running payroll and HR for a UK ecommerce business follows the same legal framework as any other employer, but the sector brings specific pressures — seasonal demand spikes, a high proportion of part-time and flexible workers, warehouse and logistics staff alongside office-based employees, and frequent use of contractors. Getting the fundamentals right matters more when your headcount fluctuates month to month.
Employment status: get the classification right first
Ecommerce businesses often rely on a mix of permanent staff, fixed-term employees, zero-hours workers, and self-employed contractors. Each classification carries different obligations.
Employees and workers are entitled to holiday pay, National Insurance contributions from the employer at 13.8%, pension auto-enrolment, and statutory sick and family-leave pay. Self-employed contractors are not — but if someone works exclusively for you, uses your equipment, and follows your instructions day to day, HMRC may treat them as an employee regardless of what the contract says.
Misclassification is one of the most common and costly mistakes in ecommerce. Before you onboard anyone, be clear on what they actually do, not just what you want to call them.
Seasonal headcount and payroll accuracy
Peak trading periods — Q4 in particular — mean many ecommerce businesses double their headcount temporarily. Every new starter triggers payroll obligations from day one.
Under Real Time Information (RTI) rules, you must submit a Full Payment Submission (FPS) to HMRC on or before each payday. There are no exceptions for seasonal workers or short-term contracts. Late submissions attract penalties.
Practically, this means your payroll process needs to scale quickly. When you bring on 20 warehouse staff for November, you need:
- Starter declarations completed (to determine the right tax code)
- National Insurance category confirmed
- Auto-enrolment assessed — workers who meet the earnings and age thresholds must be enrolled into a qualifying pension scheme within the statutory deadline, with a minimum employer contribution of 3% of qualifying earnings
For workers who leave after peak season, you need to process a leaver record through RTI promptly and issue a P45.
Zero-hours contracts and holiday pay
Zero-hours contracts are common in ecommerce fulfilment. They are legal, but they come with obligations that employers sometimes overlook.
Workers on zero-hours contracts are entitled to 5.6 weeks of statutory annual leave (28 days including bank holidays for someone working five days a week, pro-rated for irregular hours). For casual workers whose hours vary, holiday pay is calculated on the basis of average weekly earnings over a 52-week reference period.
The Employment Rights Act 2025 is relevant here. It strengthens day-one rights and introduces greater protections for workers on irregular-hours contracts, including a right to request more predictable working patterns. If your ecommerce workforce relies heavily on zero-hours arrangements, you should review your contracts and processes against the updated legislation now rather than after a complaint arises.
Warehouse and logistics staff: specific considerations
If you run your own warehouse or use employed drivers and couriers, you have additional HR obligations beyond standard payroll.
Working time rules apply — including limits on average weekly hours and requirements around rest breaks. Night workers (common in fulfilment operations) have additional protections, including a right to free health assessments.
National Minimum Wage compliance is non-negotiable. Warehouse roles are often paid close to the minimum wage, and any deduction — for uniforms, equipment, or unpaid travel time between worksites — can inadvertently push someone below the threshold. HMRC checks this, and the reputational cost of appearing on a public naming list is significant.
For employed drivers, check whether any are subject to drivers' hours rules and tachograph requirements under transport regulations — these sit outside employment law but interact with it when managing working time records.
Managing contractors and IR35
Many ecommerce businesses use contractors for web development, paid media, or logistics coordination. If those contractors operate through a personal service company and work predominantly for you, IR35 (off-payroll working rules) may apply.
As a medium or large business, you are responsible for determining IR35 status. If a contractor falls inside IR35, you become responsible for deducting income tax and employee National Insurance from their fees, and for paying employer National Insurance at 13.8%. Getting this wrong generates significant back-pay liability.
Small businesses (as defined by the Companies Act) are currently exempt from the off-payroll rules and the contractor remains responsible for their own IR35 assessment, but that exemption disappears the moment you grow past the small company threshold.
Keeping payroll records in order
Ecommerce businesses often grow quickly and informally. Payroll records sometimes lag behind. HMRC requires you to keep RTI records, payslips, and supporting documents for at least three years after the end of the tax year they relate to.
At year end, P60s must be issued to all employees on your payroll by 31 May. If any employees have received benefits in kind — company cars, private medical insurance, or expenses outside the PAYE settlement agreement — the P11D is due by 6 July. Benefits processed late or incorrectly result in interest charges and potential penalties.
A well-structured payroll process catches these deadlines automatically rather than relying on a manual calendar reminder during your busiest trading months.
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