Guides
Payroll and HR compliance for UK small businesses
Campsite · 20 June 2026
How UK business owners align payroll with HR compliance: NMW, hours evidence, RTW, leave accrual, auto-enrolment, and exporting approved time to your accountant without re-keying errors.
Who this guide is for
UK business owners who use an accountant or payroll bureau and wonder whether payroll compliance and HR compliance are the same thing. They overlap heavily, but they are not identical. Payroll compliance is mostly about tax, NIC, pensions, and pay calculation accuracy. HR compliance is mostly about employment rights, records, fair process, and lawful working arrangements.
If you searched "payroll compliance UK small business", "HR and payroll integration", or "minimum wage records employer", this guide connects the two sides so pay run day is not where problems first appear.
This is general information, not legal or tax advice. Your accountant remains authoritative on PAYE filing; this guide explains what you must supply and keep as the employer.
Payroll compliance essentials: what must be right every pay period
Your payroll provider or accountant executes calculations and files with HMRC. You remain responsible for supplying accurate inputs and meeting employer duties that payroll software alone cannot fix.
Core payroll compliance checklist
| Duty | Owner responsibility | Payroll provider role |
|---|---|---|
| PAYE registration | Register before first payday | Uses your employer reference |
| Timely HMRC payments | Fund account; approve BACS | Calculates amounts due |
| Correct tax codes | Collect P45 or starter checklist | Applies codes |
| National Minimum Wage | Supply accurate hours and rates | May flag if configured |
| Itemised payslips | Ensure delivery on or before pay day | Generates payslips |
| Auto-enrolment | Assess eligibility; choose scheme | Processes contributions |
| Statutory payments | Notify eligibility (SSP, SMP, etc.) | Calculates where eligible |
| Leavers and P45 | Tell payroll leaver date promptly | Issues P45 |
Missing any row in the left column can produce a "compliant" pay run that is still unlawful because the inputs were wrong.
Where HR compliance feeds payroll: the data chain
Think of HR as upstream of payroll. Errors in employee records propagate into every pay period until someone notices.
| HR record | Payroll impact if wrong | Example failure |
|---|---|---|
| Date of birth | Wrong NMW band | Birthday crosses threshold; rate not updated |
| Contracted hours vs actual | NMW and overtime disputes | Paid for 40 contracted but worked 55 |
| Leave without pay | Incorrect deductions | Unpaid leave not recorded before pay run |
| RTW failure | Should not be on payroll at all | Paid after permission expired |
| Leaver date | Final pay and P45 errors | Still paid two weeks after last shift |
| Bank details | Failed payment | Details sent via insecure chat |
| Pension opt-out status | AE breach | Opt-out not processed in time |
| Student loan plan | Wrong deduction | Starter checklist incomplete |
Centralising employee data in one people operations workspace reduces duplicate entry between HR onboarding and payroll starter forms. See Do I need HR software? for when that investment pays off.
National Minimum Wage: the HR-payroll junction
National Minimum Wage (NMW) and National Living Wage (NLW) compliance depends on:
- Age band on the pay date
- Worker category (apprentice, etc.)
- Total hours worked in the pay reference period
- Deductions and costs that reduce pay below minimum
Common owner failures are HR-shaped, not payroll-shaped:
- Unpaid pre-opening or closing time (working time not paid)
- Uniform or equipment costs deducted without agreement
- Salary sacrifice pushing effective pay below minimum
- Flat cash payments without payslip or hour records
Build an April review into your calendar when rates change, and a birthday review whenever a worker moves age band. Payroll can apply the rate only if HR tells it the correct band.
Hours evidence: what HMRC and tribunals expect
HMRC can investigate NMW compliance. Employment tribunals hear hours and holiday pay disputes. Both ask the same uncomfortable question: how did you know the hours were correct?
Keep defensible evidence:
| Evidence type | Purpose | Retention tip |
|---|---|---|
| Rotas (planned) | Shows intended schedule | Save published version with date |
| Timesheets or clock data | Shows actual hours | Link adjustments to approver |
| Manual adjustment log | Explains differences | Reason code, not just "fixed" |
| Manager sign-off | Shows oversight | Named approver, timestamp |
| Overtime approval | Contractual compliance | Written or system trail |
Re-keying WhatsApp hours into payroll is a compliance bottleneck. It introduces transcription errors, removes audit trail, and encourages informal "off the books" overtime.
Our Working Time compliance guide explains why rota design and timesheet reality must align before pay run.
Wagesheet batches: the modern export approach
Many UK small businesses run a split stack:
- Campsite (or similar) for HR, rotas, hiring, compliance
- Accountant or bureau for PAYE filing and bank payments
The integration point is approved hours export, sometimes called wagesheet batches:
- Managers approve timesheets or actual hours against rota
- Finance reviews batch totals and exceptions
- Approved batch exports to CSV or payroll import format
- Payroll runs with audit link back to individual shifts
This beats emailing a spreadsheet of hours because:
- Ops owns accuracy of hours; finance sees exceptions before import
- Tribunals and HMRC get a traceable chain
- Visa hour caps and Working Time flags can be reviewed pre-export
Campsite supports wagesheet batch workflows so ops approves time before payroll import. Your accountant keeps doing tax; you stop being the human API between rota and pay.
Auto-enrolment and HR onboarding
Workplace pension auto-enrolment is payroll-executed but HR-triggered. When someone joins:
- Assess whether they are an eligible jobholder (age and earnings thresholds)
- Enrol or document valid postponement
- Provide communications required by regulations
- Process opt-outs within window if applicable
Onboarding checklist items should include pension assessment before or on first pay period. See our onboarding compliance checklist for the full pre-start sequence.
Statutory sick pay and leave: HR records payroll needs
Statutory Sick Pay (SSP) eligibility depends on average earnings and waiting days. Maternity, paternity, and shared parental pay depend on HR events payroll must know about promptly.
| Event | Tell payroll | HR record to keep |
|---|---|---|
| Sickness beyond three days | As soon as SSP may apply | Fit notes, dates |
| Maternity leave start | Weeks in advance | MATB1, dates agreed |
| Unpaid leave | Before pay run | Approved request |
| Holiday on termination | On leaver processing | Accrual calculation |
Holiday pay on leavers is a frequent small business error: forgetting accrued but untaken leave in final payment. Leave balances belong in HR system; payroll executes the calculation you confirm.
Right to work and payroll: separate duties, one outcome
Right to work (RTW) is not payroll's job, but payroll must not run for someone who should not be working.
If RTW expires and nobody re-checks, continuing to pay wages can worsen an illegal working situation. Compliance gates that block rota assignment when RTW is missing also protect payroll inputs.
Read right to work check software UK guide for storage and expiry workflows.
Common small business payroll + HR failures
- Paying flat cash hours with no payslip. Criminal and civil exposure; weak tribunal defence.
- Deducting uniform or breakage costs below NMW. Deductions must be lawful and not reduce pay below minimum.
- Missing holiday pay on leavers. Accrued leave is payable; disputes are common.
- Wrong age band after birthday. Review HR dates monthly or automate alerts.
- Continuing pay after RTW expiry. Schedule re-checks before permission lapses.
- Duplicate conflicting rates in HR file vs payroll system. Single source of truth for pay rate.
- Late leaver notification. Final pay, holiday, and P45 delays create complaints.
- Tips and tronc outside documented scheme. Cash tips with no records invite NMW and tax issues.
Split stack that works for UK SMEs
You do not need one mega-vendor. Many successful small businesses run:
| Layer | Typical tool | Owner |
|---|---|---|
| People operations | Campsite | Ops / owner |
| Payroll filing | Accountant bureau | Finance |
| Accounting | Xero / Sage / similar | Finance |
| Pensions | NEST / provider portal | Finance |
Integration is CSV discipline and timing, not real-time API magic. Weekly rhythm:
- Monday: missing-document and RTW report
- Mid-week: rota published with compliance review
- End of week: timesheets approved
- Before pay run: wagesheet batch exported and checked
Compare this approach to spreadsheets in Campsite vs spreadsheets for UK employers.
Quarterly payroll-HR alignment review (30 minutes)
- Sample three employee files: contract rate matches payroll rate
- Confirm all active payroll employees have valid RTW on file
- Review one wagesheet batch trail from shift to payslip
- Check upcoming birthdays crossing NMW bands
- Verify leavers in last quarter had correct final pay and P45
- Confirm auto-enrolment assessments ran for recent starters
- Note one process fix for next month
How Campsite supports payroll-HR compliance
Campsite is a UK people operations workspace for employers with hourly and multi-site teams:
- Employee HR files with contracts, RTW, and pay rate history
- Rota and timesheet workflows with manager approval
- Wagesheet batch export for payroll-ready approved hours
- Leave tracking with balances visible before pay run
- Onboarding gates so starters are complete before scheduling
- Employment law monitor for UK pay and rights updates
- Audit trail on rate changes and hour approvals
We are not a payroll bureau. We reduce the HR-side errors that make payroll wrong.
FAQ
Is RTW payroll's job?
No. RTW is an employer duty before work starts. Payroll should not process someone who fails RTW, but HR or ops owns the check.
Can software calculate NMW automatically?
Good systems flag risks based on hours and rates. The employer remains legally responsible for compliance.
My accountant says hours are my problem. Is that normal?
Yes. Bureaus calculate from inputs you certify. Supply accurate approved hours.
Do we need real-time payroll integration?
Not necessarily. Weekly or fortnightly CSV export with audit trail suits many SMEs.
What if we pay weekly and rotas change daily?
Approve timesheets before each pay run; do not pay from stale rota alone.
Are directors on payroll different?
Director NIC and pay rules differ. HR file should still document arrangements.
How long keep payroll and hours records?
Tax records often six years; keep hours evidence that supports NMW for similar periods. Ask accountant for sector guidance.
Can agency workers go through our payroll?
Usually they are paid by agency; your compliance focus is RTW and safe working, not their PAYE.
Next steps
- Read Working Time compliance for UK small businesses
- Work through Automatic HR compliance software
- Complete the HR compliance checklist
- Review How to stay HR compliant
- Start a 14-day Campsite trial and test wagesheet export on sample shifts