How to write a warning letter to an employee (free template)

Published 28 September 2026 · Hiring and HR letters

A warning letter puts a problem on record: what happened, what needs to change, and what happens if it does not. Written well, it gives the employee a fair chance to improve, and gives you a clear record if they do not.

Before you write it

• Check your own procedure. If your handbook sets out disciplinary steps, follow them. Skipping steps you promised is one of the most common ways employers undermine their own decisions.
• Collect the facts. Dates, times, what was said or done, and who saw it. Timesheets, emails and customer complaints carry more weight than impressions.
• Hear the employee out. Meet before deciding on a warning. There may be an explanation, such as a health problem or caring responsibilities, that changes what you should do.

What to include

1. That it is a written warning, and whether it is a first or a final one.
2. What happened, as a dated list. Describe behaviour, not character: "arrived 45 minutes late on 14 September without calling in", not "is unreliable".
3. The rule or standard it breaks: the attendance policy, the code of conduct, or targets agreed at the last review.
4. Any earlier warning about the same issue, with its date.
5. What needs to change, specific enough that you will both know whether it has.
6. Support you will give, such as training, a different shift or regular check-ins.
7. A review date. The free deadline calculator works out a date a set number of days away.
8. How long the warning stays on file, commonly 6 to 12 months.
9. What happens if things do not improve: further action, up to a final warning or dismissal.
10. How to appeal, if your procedure allows it, and that the employee can add written comments.

Verbal, written or final?

These stages are common practice, not a legal requirement in most US states, where employment is usually at will. In the UK, the Acas Code of Practice on disciplinary and grievance procedures sets out a fair process, and an employment tribunal can increase compensation by up to 25% if an employer unreasonably fails to follow it. UK employees also have the right to bring a colleague or trade union representative to a disciplinary meeting that could lead to a formal warning.

Mistakes that cause trouble later

• Vague accusations. "Attitude problems" gives the employee nothing to fix and gives you nothing to rely on.
• Surprises. A warning that arrives with no conversation first feels unfair, and often is.
• Inconsistency. Warning one person for something others do without comment invites a discrimination claim.
• Protected reasons. Never base a warning on a disability, pregnancy, leave the employee is legally entitled to, union activity or a complaint they have made. Take advice before any warning that comes near these.
• Asking the employee to agree. Their signature confirms they received the letter, nothing more. If they will not sign, note the date you gave it to them and who was there.

Deliver it in person, then in writing

Give the letter in a private meeting, or send it straight after the meeting where you discussed it. Keep a copy on the personnel file and put the review date in your calendar.

Use the free template

The free employee warning letter template covers everything above: first or final warning, a dated list of incidents, the standard not met, what must change, support, a review date, time on file, an optional appeal and an acknowledgement of receipt. Answer the questions and download a Word letter; employee details stay on your computer. If things do not improve, the termination letter follows the same pattern. All the HR letters are on the free HR letter templates page.

General information, not legal advice. Employment law varies by country and state; take advice before dismissing anyone.

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