The work Christmas party has always carried a certain amount of risk. But this year, the stakes are higher and the risk of getting something wrong in the preparations could be both serious, and expensive.
By the time most office parties take place this December, two significant changes under the Employment Rights Act 2025 will already be in force. From 30 October, employers must take all reasonable steps to prevent sexual harassment, while new rules also make employers potentially liable for harassment of employees by third parties where they failed to take all reasonable steps to prevent it.
Christmas parties have always been a particular area of sexual harassment risk. Alcohol can lower inhibitions, colleagues are often socialising late at night, normal workplace boundaries can become blurred and senior and junior employees may interact very differently from how they would during the working day. Travel, hotels and continued socialising after the formal event can add further complexity.
You do not need to cancel the Christmas party or suck the fun out of the event. Employers should, however, be able to show that they considered the foreseeable risks and took all reasonable steps before everyone arrived at the venue.
Legally, Christmas parties are still connected to work
An employer cannot assume that normal workplace rules disappear once employees leave the office. An organised Christmas party is a work-related social event. Sexual comments, unwanted touching, discriminatory jokes or other harassment can therefore create the same employment law issues as conduct taking place during ordinary working hours.
The boundaries can become harder to judge when employees move on to another bar, hotel or private gathering afterwards. Each situation will depend on its facts, including how closely the event remains connected to work.
For HR, do not treat an official work social as something outside the organisation’s harassment framework merely because it involves dinner, drinks and a dance floor.
Alcohol changes the risk, not the rules
Alcohol is one of the most obvious Christmas-party risks. That does not mean businesses need to ban it. It does mean HR should consider whether the way alcohol is being provided unnecessarily increases the likelihood of inappropriate conduct.
An unlimited free bar until 2am creates a different risk profile from dinner with a limited drinks allocation. Organisations should also consider food, alcohol-free alternatives and whether managers know when and how to intervene if someone’s behaviour begins causing concern.
Most importantly, intoxication does not excuse harassment. Employees should understand before the event that the organisation’s standards of behaviour continue to apply.
A short, sensible pre-party communication can often achieve more than issuing a lengthy list of prohibitions. Remind employees that it is a work event, explain that harassment and discriminatory behaviour will not be tolerated and tell people where they can turn if something happens.
Think beyond your own employees
One of the most important differences for Christmas 2026 is the new third-party harassment regime. From 30 October, employers can be liable where an employee is harassed in the course of their employment by a third party and the employer failed to take all reasonable steps to prevent it. This risk includes customers, clients, contractors, people at events and members of the public in shared spaces as potential third parties.
That has obvious implications for Christmas parties. An employee might be harassed by a client invited to dinner. Someone working behind the bar could behave inappropriately towards an employee. A stranger in a shared hotel bar could make racist or sexual comments.
An employer cannot prevent every member of the public from behaving badly. The law does, however, require employers to think about what reasonable preventative measures are available.
Venue choice is therefore part of compliance. HR might want to understand whether the party has a private room, what areas are shared with the public, how venue security works and who should be contacted if somebody needs to be removed. Where clients or other guests are being invited, the business should also be clear that commercial importance does not give somebody permission to behave however they like.
The new rules expressly focus on whether the employer took all reasonable steps, rather than expecting an impossible guarantee that no third party will ever harass an employee.
Pay particular attention to power imbalances
Christmas parties can change the dynamics between people who would normally interact in relatively structured professional settings.
A junior employee might suddenly find themselves drinking with a managing director. A client relationship manager may feel unable to challenge an important customer. Someone on a temporary contract may worry that objecting to inappropriate jokes will make them look difficult. Those power imbalances should feature in the organisation’s risk assessment.
Reporting arrangements are particularly important. Employees should have somewhere to raise a concern other than their immediate manager, especially where that manager could themselves be involved.
Managers attending the party also need to know what is expected of them. They do not need to spend the evening acting as security guards, although somebody should understand how to respond if an employee says they are uncomfortable, wants to leave or reports inappropriate behaviour.
Do the risk assessment before the invitations go out
The strengthened duty places even greater importance on understanding the specific risks within an organisation. Taking all reasonable steps includes focusing on prevention and taking all of the measures that are reasonable for the particular organisation. Employers should consider Christmas-party risks such as alcohol, travel, overnight stays and power imbalances.
HR should therefore conduct a short event-specific risk assessment while the party is still being planned. That does not need to become an elaborate exercise. Look at the venue, guest list, alcohol arrangements, transport, seniority of attendees, involvement of clients or customers, previous problems at social events and how employees would report something if it happened.
Then ask the more important question: what can reasonably be done about those risks? Perhaps a different venue would reduce interaction with members of the public. Perhaps managers need a short briefing. Perhaps employees need reminding of an alternative reporting route. Perhaps the company should reconsider an unlimited free bar. The purpose of the exercise is to connect identifiable risks with practical preventative measures.
Do not forget what happens after the party
The formal finishing time deserves some thought too. A company that books dinner until 11pm and then continues paying for drinks at another venue may find it difficult to argue that the work-related event clearly ended at 11pm.
HR cannot control employees’ private lives. It can be clearer about when the official event ends, what the company is paying for and whether any later gathering is being organised or encouraged by the business.
Transport is another practical issue. Where people will be leaving late at night, consider whether employees have a safe way to get home and whether anyone feels pressured to continue socialising because senior colleagues are doing so.
The tribunal risk lasts longer too
Christmas 2026 also takes place under a changed employment tribunal regime. From 1 October 2026, the statutory changes extending many employment tribunal claim time limits from three months to six months came into force, subject to the relevant transitional and procedural rules.
Combined with the strengthened harassment duties, this means employers have good reason to ensure that their policies, training, risk assessments and records are in order before the festive season begins. If an incident does happen, the organisation may later need to demonstrate what it knew about the risks and what it did to prevent them. A generic harassment policy sitting on the intranet will tell only part of that story.
Prepare now, enjoy the party later
A lawful Christmas party does not require HR to remove all the fun. It requires some advance thought about the circumstances employees will actually encounter. Risk assess the event, consider alcohol and third parties, set expectations, make sure reporting routes work and ensure managers know what to do if something goes wrong.
From 30 October, employers will be judged against an all reasonable steps standard. Christmas parties are exactly the kind of foreseeable, higher-risk workplace event where being able to show that the organisation thought ahead may matter.
