How to Write a Job Description UK: Employer Guide

How to write a job description UK is one of those topics employers often underestimate. A rushed job description can attract the wrong applicants, weaken interview scoring, create inconsistency in probation decisions and, in the worst cases, create discrimination risk if essential criteria are poorly framed. Acas provides job description templates and recruitment guidance because the document sits at the centre of fair hiring, role clarity and day-one expectations. citeturn604805search2turn604805search5turn604805search8turn604805search11turn604805search14

This guide explains how to write a job description in plain English, what sections to include, how to separate essential and desirable criteria, and how to keep the document useful for recruitment, onboarding and performance management.

How to write a job description UK employers can actually use

A strong job description is not a wall of vague duties. It should explain:

• the purpose of the role
• where the role sits in the organisation
• the main responsibilities
• the skills, knowledge and experience required
• the reporting line
• any location, hours or travel expectations

Acas templates typically structure a job description around the job title, department or section, the main purpose of the job, key tasks and key results or objectives. That is a sensible framework because it helps applicants understand both the role and how success will be judged. citeturn604805search2turn604805search14

What is the difference between a job description and a person specification?

A job description explains the role itself. A person specification explains the attributes needed to perform it well. Employers often blend the two, but keeping the distinction clear makes recruitment fairer and easier to score.

For example:

• the job description might say “manage monthly payroll submissions”
• the person specification might say “experience using payroll software and handling RTI submissions”

This split matters because Acas recruitment guidance recommends selecting interview candidates against the criteria in a fair and consistent way, often using a scoring approach. citeturn604805search8

What should be included in a UK job description?

A practical structure looks like this:

How detailed should the duties section be?

Detailed enough to be useful, but not so detailed that it becomes a procedure manual. Focus on the core parts of the role:

• 6 to 10 main duties is often enough
• use action verbs such as “manage”, “prepare”, “review” and “coordinate”
• avoid vague phrases like “help out where needed” unless genuinely necessary
• keep duties realistic for the grade and pay level

Employers often make the mistake of writing every possible task into the role. That usually produces a bloated document that no applicant can interpret properly.

How do you make a job description fair and interview-ready?

A good job description should be written so it can feed directly into shortlisting and interviews. Acas recommends selecting applicants in a fair way and notes that using a scoring system can help. That only works if the criteria are clear from the start. citeturn604805search8

That means employers should:

• define essential criteria separately from desirable criteria
• avoid inflated requirements that are not necessary
• use plain English rather than internal jargon
• make sure the salary level and seniority broadly match the responsibilities
• check that the duties align with the contract and onboarding plan

Should small businesses use a template?

Yes. For most SMEs, a template improves consistency and saves time. Acas offers job description templates specifically to help employers structure the role and avoid starting from a blank page. citeturn604805search2turn604805search11

A template also helps when multiple managers recruit, because it creates a common structure for:

• advertised responsibilities
• interview scoring
• probation expectations
• later updates to the role profile

How to write a job description for small business roles

Small businesses often hire for flexible roles where one person covers admin, customer service and operations. That does not mean the job description should be vague. It means it should explain the priority areas clearly.

For a smaller employer, the best approach is usually:

1. state the main purpose of the role in one sentence
2. list the 5 to 8 outcomes the employee is mainly responsible for
3. set out the reporting line and working pattern
4. separate essential from desirable requirements
5. include a short note that duties may evolve with the business, without making the role completely open-ended

Job description drafting checklist

Use this checklist before publishing or issuing the role:

• use a clear, searchable job title
• describe the main purpose of the role in one short paragraph
• list the core duties using action verbs
• confirm the reporting line and team context
• state location, hours and any travel requirements
• separate essential and desirable criteria
• remove jargon and unnecessary requirements
• check wording for fairness and discrimination risk
• make sure the role aligns with the offer letter and contract
• save the final version for onboarding and probation use

Frequently asked questions

Key takeaways

Understanding how to write a job description UK employers can rely on comes down to clarity, fairness and practical use after recruitment. A good template improves hiring decisions, interview consistency and early performance management. For related support, see the writing effective job descriptions guide, the how to conduct interviews legally guide, the employment contract essentials guide and the Employee Handbook Generator.