Small business hiring guide
Salary is only the starting point. Before you make your first hire or next hire, budget for employer National Insurance, pension contributions, paid leave, equipment, onboarding, payroll and the legal documents that make the relationship clear from day one.
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Quick answer
As a rough planning rule, many UK employers should expect the employer-side cost of employment to sit materially above headline salary once employer National Insurance, pension contributions, paid leave, equipment, recruitment and compliance are included.
Avoid treating any online percentage as a universal answer. Payroll thresholds, pension rules, role seniority and the practical cost of cover can all change the number.
Interactive tool
Estimate the employer-side cost of hiring an employee beyond salary alone, including employer National Insurance, pension contributions, recruitment, equipment, software and onboarding costs. These are planning figures, not payroll, accountancy or legal advice.
Employer-side planning estimate
This calculator estimates employer-side costs only. It does not calculate employee income tax, employee National Insurance, or take-home pay.
Example planning presets
Optional illustrative assumptions. Presets leave the salary and pension percentage unchanged.
The contractual salary before employer-side costs.
Simplified planning percentage applied to salary. Maximum 30%.
One-off first-year cost.
One-off first-year cost.
One-off first-year cost.
Recurring monthly cost annualised in the result.
Recurring annual planning cost.
Estimated first-year cost
£34,650
Salary plus employer-side payroll and planning costs.
Estimated ongoing annual cost
£34,650
Excludes one-off recruitment, equipment and onboarding costs.
Monthly first-year equivalent
£2,888
Ongoing monthly equivalent: £2,888.
Cost above salary
£4,650
15.5% uplift on the salary entered.
Rounded planning figures using 2026/27 assumptions.
Annual salary
£30,000
Employer NI before Employment Allowance
£3,750
Estimated employer NI after allowance
£3,750
Employer pension contribution
£900
Recruitment cost
£0
Equipment cost
£0
Training / onboarding cost
£0
Annual software cost
£0
Insurance / miscellaneous annual cost
£0
Estimated first-year total
£34,650
Estimated ongoing annual total
£34,650
Employment Allowance has not been applied. Eligible employers may be able to reduce their employer National Insurance bill.
Using the same simplified 2026/27 assumptions, here is what the employer-side cost looks like before optional recruitment, equipment, software or onboarding costs.
Salary
£25,000
Salary
£30,000
Salary
£40,000
Salary
£50,000
Employment Allowance is not applied in these examples. Optional setup costs are excluded. These are planning figures only.
Practical next step
Once the cost works, the next step is getting the employment terms clear before the employee starts.
You may also want to review the Small Business Legal Toolkit and the Employment Rights Act 2025 hub.
Cost breakdown
The right budget combines payroll, workplace setup and compliance. The exact mix depends on the role, whether the employee is full-time or part-time, where they work, and what systems your business already has.
The headline salary is the starting point, not the total budget. Check the role, working hours, commission or bonus promises, overtime expectations, and whether the salary is comfortably above current minimum wage rules for the hours actually worked.
Employers may need to pay employer National Insurance contributions through payroll on top of gross salary. The amount depends on current HMRC thresholds, payroll settings, age, category letter, and any available employment allowance position.
Auto-enrolment duties can add employer pension contributions where the worker is eligible or opts in. Budget for contributions, payroll administration, postponement decisions, employee communications, and the ongoing compliance calendar.
Employees are paid while taking holiday, so absence from work has an operational cost even though it is part of normal employment. Plan cover, handovers, rota pressure, bank holiday treatment, and how holiday accrues in the first year.
Advertising, recruiter fees, interview time, reference checks, background checks, and candidate delays can all add cost before the employee starts. The more specialised the role, the more recruitment friction should be budgeted upfront.
New hires need management time, system access, supervision, handover notes, policy briefings, and early performance reviews. Productivity usually builds over time rather than arriving fully formed on day one.
Laptops, phones, licences, email, payroll software, HR systems, security tools, uniforms, desk space, and home-working equipment can turn a neat salary figure into a broader monthly operating cost.
Employers should consider employers’ liability insurance, health and safety processes, data protection, right to work checks, payroll records, HR policies, and the cost of keeping documents current when the law changes.
Worked example
Using the same simplified 2026/27 planning assumptions as the calculator above, a £30,000 salary produces the following employer-side estimate before any role-specific setup costs.
These are illustrative planning figures only. Employment Allowance, salary sacrifice, pension scheme rules, worker category, benefits, payroll timing and future threshold changes can alter the actual cost.
Headline salary
£30,000
The contractual gross salary before employer-side costs.
Estimated employer NI
£3,750
15.0% above the £5,000 annual Secondary Threshold planning assumption.
Employer pension at 3.0%
£900
Simplified planning contribution using the calculator default pension percentage.
Role-specific setup costs
varies
Recruitment, equipment, onboarding and software depend on the role.
Estimated employer-side cost before optional extras
£34,650
Salary plus estimated employer NI and simplified employer pension only.
Cost above salary
£4,650 / 15.5%
The estimated employer-side uplift before optional setup costs.
Employment law obligations
Payroll is only one part of the hiring decision. A small employer also needs a defensible workplace process: clear terms, lawful checks, accurate records, safe systems of work and policies managers can actually follow.
✓ written employment particulars or a full employment contract issued on time
✓ right to work checks before employment starts
✓ PAYE payroll setup and accurate payslips
✓ workplace pension assessment, communications and contribution duties
✓ health and safety responsibilities, including risk assessment where relevant
✓ policies for discipline, grievance handling, sickness, holiday, flexible working and data handling
Documents to prepare before hiring
A document will not guarantee compliance by itself, but it gives managers and employees the written framework they need before the relationship starts.
The core document for role, pay, hours, holiday, sickness, notice, confidentiality, pension and post-termination restrictions.
View document →Use before the start date to confirm the role, salary, proposed terms and offer mechanics before the full contract is signed.
View document →Sets a consistent framework for investigations, hearings, warnings, outcomes and appeals before conduct problems arise.
View document →Helps managers handle flexible working requests consistently, with clear decision-making, consultation and records.
View document →Common mistakes
A £30,000 role is not just a £30,000 cash commitment once payroll costs, pensions, cover, equipment, software and onboarding are included.
If terms are unclear, disputes over pay, hours, probation, notice, duties and confidentiality become harder to resolve and more expensive to evidence.
Employer-side payroll costs can be material. Treat payroll setup as part of the hiring decision rather than an admin task after the offer is accepted.
Status depends on the real working relationship, not just the label in the contract. Control, substitution, mutual obligations and integration all matter.
Discipline, grievances, sickness absence and flexible working requests are harder to manage consistently if the process is invented under pressure.
Related Bracton guides
Check what should go into the contract before you issue written terms to a new employee.
Open resource →Work through the role, status, offer, contract, payroll, pension, policy and onboarding steps before day one.
Open resource →Understand current employment law changes before issuing new contracts and policies.
Open resource →Put hiring in the wider small-business legal context: contracts, freelancers, IP, debt recovery and risk controls.
Open resource →Browse the employment documents available on Bracton for hiring, policies and workplace administration.
Open resource →Compare employment with genuine freelance or contractor engagements before choosing the working model.
Open resource →Common questions
No. Salary is only the starting point. Employers also need to consider employer National Insurance, pension contributions, paid leave, payroll administration, equipment, software, onboarding, insurance and employment law compliance.
Next step
Use Bracton to create the core employment documents small businesses need before hiring.