Payroll is one of the most time-sensitive tasks in any business. Here's what it involves, what can go wrong, and how to handle it systematically.
What Payroll Actually Involves
Payroll is not just "transferring salaries." Done properly, it encompasses:
Every payroll period, several things have to happen in the right order, by the right deadline.
The Payroll Cycle
Weekly payroll: calculate, deduct, pay, report — every week. High-frequency, lower administrative risk per period.
Bi-weekly / fortnightly: every two weeks. Common in many countries.
Monthly: once per month. Lower frequency = fewer events, but each one is larger and more complex.
Most small businesses run monthly payroll for salaried employees and weekly for hourly workers.
Gross to Net: The Core Calculation
For each employee, each pay period:
Gross pay: Base salary ÷ pay periods, plus any overtime, bonuses, or commission.
Pre-tax deductions: Pension contributions, health insurance premiums (if employee pays a share).
Taxable pay: Gross pay minus pre-tax deductions.
Income tax: Calculated based on the employee's taxable pay, tax code, and the tax tables for your jurisdiction.
Employee social contributions: National insurance / social security — a percentage of earnings above a threshold.
Post-tax deductions: Any deductions not affecting tax (e.g. voluntary extras).
Net pay: What the employee actually receives.
What the Employer Owes (Beyond the Salary)
Employers pay contributions on top of employee salaries — these are an employment cost beyond the gross wage:
These costs can add 20–30% to the effective cost of an employee above the salary figure.
Payroll Compliance: What Can Go Wrong
Late payment to employees. Employees must be paid on the agreed date. Late payment is an employment law issue.
Late reporting. Most tax authorities require payroll to be reported each period (in the UK, Full Payment Submission must be sent on or before payday). Late submissions incur penalties.
Wrong deductions. Using the wrong tax code, miscalculating thresholds, or applying wrong rates leads to under or over-deductions — which require correction and can cause employee relations issues.
Forgetting starters and leavers. New employees need to be added immediately. Leavers need final pay calculations including any outstanding leave entitlement.
Year-end payroll. Most payroll systems require a year-end reconciliation — annual returns, P60s (UK), payment summaries, W-2s (US), etc. This must be completed by the statutory deadline.
Should You Do Payroll Yourself or Outsource?
DIY with software: Payroll software handles the calculations and generates the reports. You still need to understand what you're doing — missing a deadline or a deduction is your responsibility.
Payroll bureau: An external payroll provider handles everything: calculations, filings, payslips. You give them the hours/salaries and they process it. Costs £10–50 per employee per month typically.
For businesses with fewer than 5 employees, DIY with good software is manageable. Above 10, the time cost of payroll often justifies outsourcing.
Payroll in Quotation Expert
Quotation Expert includes a Payroll module for recording employee pay runs, calculating net pay, and tracking payroll costs. The payroll report shows total payroll spend by period, and payroll costs feed into your Profit & Loss report as an operating expense — giving you a complete financial picture that includes your people costs.
Try it free
Ready to simplify your business?
Create professional invoices, track expenses, and manage your business — all in one place. Free to start, no credit card required.