UK Employer Rules · 2026
Can my employer reduce my contracted hours without my agreement?
Legal basis
Employment Rights Act 1996 — section on legislation.gov.uk">Employment Rights Act 1996 s.1 (written particulars must specify hours); contract law principles; constructive dismissal under ERA 1996 s.95(1)(c) where 2+ years' service.
When they CAN do it
Your employer CAN reduce hours if: (1) you give written consent; (2) you're on a zero-hours contract with no minimum guaranteed hours; (3) the contract has a genuine, narrowly-drafted variation clause covering hours; (4) it's part of a formal redundancy consultation where reduced hours is offered as an alternative to redundancy and you accept; (5) it's a temporary lay-off under a contractual lay-off clause.
When they CANNOT do it
Your employer CANNOT: unilaterally reduce your contracted hours; tell you 'business is slow so you're on 3 days from now'; cut Saturday shifts from your contract without consent; reduce hours and pay together to save money. Each of these is a breach of contract regardless of business reason.
What you should do
1) Get the proposed change in writing. 2) Check your contract for any flexibility clause. 3) Object in writing the same day if you don't agree. 4) Continue working your contracted hours under protest. 5) Calculate financial impact. 6) Raise a formal grievance. 7) If forced through, you can claim breach of contract (no service minimum) or resign and claim constructive dismissal (need 2 years' service for unfair dismissal element). Talk to ACAS first (free conciliation).
Worked example
James worked 35 hours/week at a retailer for 4 years. Management told him in March that his hours would drop to 25 from April due to falling footfall, with no consultation. He emailed HR objecting, said he was working under protest, and raised a grievance. The employer offered to keep him at 35 hours but on a different shift pattern; he negotiated to 32 hours with a guaranteed Saturday shift. Without his pushback, he'd have lost £580/month.
Red flags — when to escalate
🚨 'Business need' language with no consultation. 🚨 No written notice of the change. 🚨 Pressure to 'just go along' verbally. 🚨 No flexibility clause being relied upon. 🚨 No alternative offered like voluntary redundancy.
Recruiter pro tip
Reduced hours often signals impending redundancy. If your employer can't justify keeping you on full hours, the redundancy procedure (with statutory pay if 2+ years' service) is the proper route — not unilateral hours cuts. Many employers try the cheap route first (cutting hours) and only do proper redundancy if challenged. Push back early, in writing, and ask whether they're considering redundancy.
Related questions
Can my employer change my contract without my agreement?
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