Can your employer change your contract without your agreement? In most cases, an employer cannot simply change an agreed contractual term because they want to. Employment contracts are legally binding agreements, and changing their terms will usually require agreement between the employer and employee, unless a valid contractual provision or another legal basis allows the change.
Your employer will usually need your agreement to change a contractual term such as your pay, working hours or place of work. A contract may contain a clause allowing certain changes, but that does not automatically make every change lawful. If your employer imposes a change without a valid basis, you may have grounds to challenge it. The right response depends on your contract, the change, what your employer has said and what you have done since it was introduced.
When can an employer change your contract?
An employment contract is an agreement between you and your employer. Its terms may be set out in a signed contract, an offer letter, a written statement of employment particulars or other documents. Some terms may also arise from verbal agreements, established workplace practices or collective agreements incorporated into the contract.
Either side can propose a change. However, proposing a change is not the same as having the right to impose it.
Changes may be agreed through a discussion, a written agreement, an agreed variation or, in some circumstances, conduct that clearly demonstrates acceptance. Where a change affects your main terms of employment, your employer generally must provide written details of the change within the applicable statutory timeframe.
Examples of changes that may require agreement include:
- Reducing your basic salary or removing a contractual allowance.
- Changing your normal working hours or shift pattern.
- Moving your normal workplace to a different location.
- Changing your job duties in a way that goes beyond reasonable adjustments within your existing role.
- Reducing contractual holiday entitlement or changing other agreed benefits.
- Changing a contractual notice period or another express term.
Not every workplace adjustment is a contractual variation. Employers can often make reasonable management decisions within the flexibility already provided by the contract. The important question is whether the proposed change alters an existing contractual right or obligation.
Can your employer rely on a flexibility clause?
Some employment contracts contain clauses allowing the employer to make particular changes. These are often called flexibility clauses or variation clauses. For example, a contract might permit reasonable changes to duties, working arrangements or work location.
Such a clause may give your employer some flexibility, but it is not an unlimited permission to change any term at any time.
The wording of the clause matters. So do the nature of the proposed change, the circumstances in which it is being used and whether the employer is acting reasonably and consistently with its contractual obligations.
A clause allowing reasonable changes to duties, for example, does not necessarily allow an employer to cut your salary substantially. Similarly, a mobility clause may permit relocation within defined limits without automatically authorising every possible move.
Before relying on a clause, check:
- Its exact wording: What changes does it actually cover?
- Its limits: Does it refer to reasonable changes, particular locations or specified circumstances?
- Notice and consultation: Does the contract require advance notice or a particular procedure?
- How it is being used: Is the employer genuinely acting within the clause, or attempting to use it to make a fundamental change?
- Other legal duties: Could the change raise discrimination, health and safety, working-time or other legal concerns?
A flexibility clause should not be treated as proof that a proposed change is lawful. Its effect depends on the contract and the facts.
What if your employer imposes a change without your agreement?
If your employer announces a new term and says it will apply whether or not you agree, the position needs careful assessment. If the employer has no contractual or other lawful basis for the change, imposing it may amount to a breach of contract.
For example, imagine that your contract provides for a salary of £32,000 a year. Your employer announces that your salary will fall to £29,000 from the following month. You have not agreed to the reduction, and the contract contains no applicable provision allowing it.
The employer’s announcement does not automatically mean that the contractual salary has lawfully changed. Depending on the circumstances, you may have potential arguments about breach of contract or unlawful deductions from wages if you are paid less than you are contractually entitled to receive.
Other imposed changes can create different issues. A change to hours may affect pay, childcare arrangements or working-time rights. A relocation may raise questions about a mobility clause, travel requirements or disability-related adjustments. A reduction in duties or status may affect contractual rights and working relationships.
There is no single remedy that applies to every imposed change. The nature of the term, the amount at stake, your response and the available legal route all matter.
Does continuing to work mean you have accepted the change?
Not necessarily, but your conduct can matter.
If an employer introduces a change and you continue working under the new arrangements without objecting, the employer may argue that you accepted the variation through your conduct. Whether that argument succeeds depends on the circumstances. Continuing to work does not automatically settle the issue in every case.
If you disagree with the change, consider making your position clear in writing as soon as reasonably possible. Explain which term you believe is being changed, state that you have not agreed to the variation and ask your employer to explain its contractual basis.
Keep a copy of your message and any response. If you have already worked under the new arrangements, do not assume that your rights have either disappeared or been preserved automatically. Obtain advice about your particular situation.
What is fire and rehire?
“Fire and rehire” is commonly used to describe dismissal and re-engagement. It occurs when an employer dismisses an employee under their existing contract and offers to employ them again on new terms.
An employer might propose this route after failing to obtain agreement to changes involving pay, hours, shifts or benefits. It is different from simply announcing a change and treating the old contract as if it had already been amended.
Dismissal and re-engagement can create significant legal risks. The employer must consider the applicable dismissal law, provide the correct notice and follow a fair process where required. Collective consultation obligations may also arise when the employer proposes 20 or more dismissals at one establishment within the relevant period.
The statutory Code of Practice on dismissal and re-engagement applies in England, Scotland and Wales. It expects employers to explore alternatives and conduct meaningful consultation. It also makes clear that dismissal and re-engagement should be a last resort. A tribunal may take relevant failures to follow the Code into account, and an unreasonable failure can affect certain awards.
The law is also changing. The Employment Rights Act 2025 provides for additional restrictions on dismissals used to impose certain contractual changes. The government’s published implementation timetable has placed the new fire-and-rehire protections in January 2027. Because commencement dates and the details of covered terms matter, check the current rules before relying on those future protections in an individual case.
You can read the official guidance here:
- Acas guidance for employees facing dismissal and rehire.
- The statutory Code of Practice on dismissal and re-engagement.
What should you do if you disagree with a contract change?
Your first steps can help preserve evidence and clarify the dispute. Consider the following approach.
1. Get the proposed change in writing
Ask your employer to confirm exactly what is changing, when the change is intended to take effect and why it is being proposed. Keep the announcement, emails, letters, meeting notes and any revised contract.
2. Compare the proposal with your existing terms
Read your signed contract, offer letter, written statement and any relevant policies or collective agreement. Identify the precise term affected and check whether the contract contains a clause that could authorise the change.
3. Ask for the contractual basis
If you believe the change requires your agreement, ask your employer to explain the basis on which it believes it can proceed. You can also ask whether the proposal is negotiable and whether alternatives have been considered.
4. Record your position clearly
If you do not agree, explain your concerns in writing. Avoid relying solely on a verbal objection. Keep the wording professional and factual, and make clear whether you are seeking clarification, proposing an alternative or raising a formal grievance.
5. Consider the grievance procedure
If the issue cannot be resolved informally, your employer’s grievance procedure may provide a route to challenge the decision. Follow the relevant process and keep records of meetings and outcomes. A grievance does not automatically suspend legal deadlines.
6. Get advice before taking a major step
Resigning, refusing work, signing a new contract or accepting a reduced salary can have significant consequences. Before taking an irreversible step, consider obtaining advice on the contractual position, possible remedies and any relevant time limits.
What evidence should you keep?
Useful documents may include:
- Your original contract and any later variations.
- The written announcement of the proposed change.
- Emails or messages about consultation, negotiations or objections.
- Payslips, rotas, timesheets or other records showing the practical effect.
- Meeting notes and the names of people who attended relevant discussions.
- Any grievance, appeal or written response from your employer.
- Evidence of financial loss or other consequences caused by the change.
Keep documents lawfully and avoid copying confidential business or personal information that you are not entitled to access. A clear timeline of what happened and when can make it easier to assess the issue.
Are there time limits for challenging a contract change?
Potential claims have different time limits. Many employment tribunal claims must be started within a short period, often three months less one day from the relevant act or event, although the precise rule depends on the type of claim. Acas Early Conciliation can affect the calculation of some tribunal deadlines.
Certain contractual claims may follow different rules depending on the court or tribunal route and the legal basis of the claim. Do not assume that raising a grievance or continuing negotiations pauses a deadline.
If your employer has already reduced your pay, issued notice, dismissed you or set a date for a disputed change, get advice promptly. Identifying the correct claim and deadline early can be important.
Examples: how the answer may differ
Example 1: A pay reduction
Your employer announces a permanent reduction in basic salary and says everyone must accept it. Your contract specifies your salary and contains no obvious term permitting the reduction. The employer may need your agreement, and imposing the change could raise contractual or wage-related issues. The documents and the employer’s actions should be reviewed before deciding what to do.
Example 2: A reasonable change to duties
Your contract says you may be asked to undertake other reasonable duties consistent with your role. Your manager reallocates some tasks within that scope. This may be an ordinary management decision rather than a contractual variation. The answer may differ if the change substantially alters your role, status or pay.
Example 3: A new shift pattern
Your employer proposes moving you from fixed daytime hours to rotating shifts. Check the hours and flexibility provisions in your contract, how the change has been discussed, and whether other legal duties or personal circumstances are relevant. Do not assume either that the employer can change the pattern freely or that every change is prohibited.
Example 4: A new contract after dismissal
Your employer says you will be dismissed unless you sign a contract with less favourable terms. This may involve dismissal and re-engagement, rather than a simple variation. The employer’s reasons, consultation, notice, procedure and the legal protections in force at the time should be examined urgently.
Frequently asked questions
Can my employer change my contract without asking me?
Usually, an employer needs agreement to vary an existing contractual term unless a valid contractual provision or other lawful basis permits the change. Whether a particular change is allowed depends on the wording of your contract and the circumstances.
Can my employer reduce my salary without my agreement?
A contractual salary reduction will usually require agreement unless a valid legal or contractual basis applies. If your employer pays less than you are contractually entitled to receive, you may have grounds to challenge the reduction. Review your contract and obtain advice about the available options.
Can my employer change my working hours?
It depends on your contract, any applicable flexibility clause and the nature of the proposed change. A reasonable adjustment within existing terms may be permitted, while a substantial change to agreed hours may require agreement.
What if my contract contains a flexibility clause?
The clause may allow specified changes, but its wording and limits matter. It does not automatically give your employer unrestricted power to change your pay, duties, hours or workplace. Consider whether the proposed change genuinely falls within the clause.
Does working under the new terms mean I have accepted them?
Not automatically. However, your conduct and whether you objected can be relevant to whether a variation was accepted. If you disagree with the change, consider stating your position clearly in writing and seeking advice.
Can my employer dismiss me if I refuse a new contract?
An employer may propose dismissal and re-engagement, but this carries legal risks and must be assessed under the applicable law and procedure. The employer’s reason, consultation, notice and the terms being changed can all matter. Additional statutory restrictions are scheduled to apply in 2027, so check the law in force when the issue arises.
Should I sign a new contract if I disagree with it?
Do not sign without understanding what the new terms mean and whether signing could affect your position. Ask for time to review the document, raise questions in writing and consider advice before accepting a significant change.
How long do I have to challenge a contract change?
Time limits depend on the legal claim and the route used. Many employment tribunal claims have short deadlines, often three months less one day, and Acas Early Conciliation may affect the calculation. Seek advice promptly rather than waiting for an internal grievance to finish.
Get advice on your contract change
The key question is not simply whether your employer wants to change your terms. It is whether the proposed change is permitted by your contract and the law, whether the correct process has been followed, and what options are available if you disagree.
If your employer is changing your pay, hours, duties, location or benefits, gather the existing contract, the proposed terms and the relevant correspondence. A focused review can help identify the contractual issues, the risks of different responses and the next steps worth considering.
Consider a Legal Clarity Review to assess your employment situation, understand the issues raised by the proposed change and identify practical next steps.
Important information: This article provides general information about employment law in Great Britain and is not legal advice for your particular circumstances. The law and commencement dates can change. Northern Ireland has a separate employment-law framework. If a deadline, dismissal or significant financial change is involved, seek advice based on your individual facts.