Continuous service (also called continuous employment) is the unbroken length of time an employee has worked for the same employer, measured in weeks from the day their employment started to the day it ends. In UK employment law it is the clock that decides which statutory rights an employee has earned.
Get the start date wrong by a few weeks and you can hand someone a tribunal claim they should not have had, or refuse a redundancy payment they were legally owed. This guide explains how continuity is measured, what breaks it, what does not, and which rights unlock at which service thresholds.
Key takeaways
- Continuous service runs in whole weeks from the first day of employment, not from the end of probation.
- Most gaps of a full week without a contract break continuity, but sickness, temporary shutdowns, and family leave usually do not.
- A TUPE transfer preserves continuous service. The transferring employee keeps their original start date.
- Different rights have different qualifying periods, from day one up to two years.
What Is Continuous Service in UK Employment Law?
Continuous service is the statutory measure of how long an employee has been employed by one employer without a qualifying break. The rules sit in Part XIV, Chapter I of the Employment Rights Act 1996, and gov.uk publishes a plain-English summary.
Two points catch employers out. First, continuity is presumed to exist unless you can show otherwise, so the burden of proving a break sits with you. Second, it is a statutory concept, not a contractual one. You cannot shorten someone’s continuous service by writing a clause into a contract or by issuing a new contract on a promotion.
How Is Continuous Service Measured?
Continuity is counted in weeks. The clock starts on the first day the employee is contracted to work for you, including any day spent in induction, and it runs until the effective date of termination.
Where the clock starts
The start date is the first day of employment under the contract, not the day probation ends and not the day the first payslip is issued. Statutory notice is then added on top when you calculate the termination date for qualifying-period purposes, which can push an employee over a threshold they appeared to miss.
Which weeks count
Under section 212 of the Employment Rights Act 1996, any week in which the employee’s relations with the employer are governed by a contract of employment counts towards continuity. Part-time weeks count in full. Since 1995 there has been no minimum hours threshold, so a five-hour week counts the same as a forty-hour week.
What Breaks Continuous Service, and What Does Not?
The general rule is simple: a whole week (Sunday to Saturday) in which no contract of employment exists breaks continuity, and the clock restarts from zero on re-engagement.
The statutory exceptions matter more than the rule. Under section 212 of the Employment Rights Act 1996, continuity is preserved where the employee is:
- Absent through sickness or injury, for up to 26 weeks.
- Absent because of a temporary cessation of work, such as a seasonal shutdown or a gap between contracts.
- Absent by arrangement or custom, where both sides treat the employment as continuing.
Continuity is also preserved across statutory maternity, paternity, adoption, shared parental, and parental leave, and where an employee moves between associated employers in the same group. Weeks spent on strike do not break continuity, but they do not count towards it either, so the start date is pushed forward by the number of days lost.
What does break it: a genuine resignation followed by a re-hire after a clear week, and a period working for you through an agency or as a genuinely self-employed contractor, because there is no contract of employment in those weeks.
Does a TUPE Transfer Break Continuous Service?
No. A TUPE transfer preserves continuous service in full. Under regulation 4 of the Transfer of Undertakings (Protection of Employment) Regulations 2006, the contracts of transferring employees pass to the new employer as if they had originally been made with them.
In practice this means the transferring employee keeps their original start date, not the transfer date. Gov.uk sets out the position for both sides of a transfer. If you are acquiring a team, ask for original start dates in due diligence. Inheriting fifteen people who each have four years of accrued continuity is a materially different liability from inheriting fifteen new starters.
Which UK Rights Unlock at Which Service Thresholds?
Different statutory rights carry different qualifying periods. The table below lists only thresholds set out directly in primary legislation or gov.uk guidance.
| Right | Continuous service required | Source |
|---|---|---|
| Written statement of employment particulars | Day one | ERA 1996 s.1 |
| Statutory annual leave (5.6 weeks) | Day one, accruing from the start | WTR 1998 reg 13 |
| Request flexible working | Day one | gov.uk |
| Statutory minimum notice from the employer | 1 week after 1 month; then 1 week per full year from 2 years, capped at 12 weeks | ERA 1996 s.86 |
| Statutory minimum notice from the employee | 1 week after 1 month | ERA 1996 s.86(2) |
| Statutory Maternity Pay | 26 weeks by the end of the qualifying week (the 15th week before the expected week of childbirth) | gov.uk |
| Statutory redundancy pay | 2 years | ERA 1996 s.155 |
| Ordinary unfair dismissal claim | 2 years | ERA 1996 s.108 |
Two important qualifications. Dismissals for automatically unfair reasons, including whistleblowing, pregnancy, and trade union activity, carry no qualifying period at all under section 108(3). And the two-year qualifying period for ordinary unfair dismissal is an area of active reform, so confirm the position on gov.uk before you rely on it for a live decision.
Statutory redundancy pay is then calculated in age-banded weeks, capped at 20 years of service, using a statutory weekly pay maximum that is reviewed each April. Check the current redundancy pay rates on gov.uk rather than a figure you have saved in a spreadsheet. If you are working through a redundancy, our guide to paying accrued annual leave on redundancy in the UK covers the holiday side of the final payment.
How Do You Keep Continuous Service Records Straight?
Run a short continuity audit whenever an employee’s status changes. Four questions catch nearly every error:
- Is the recorded start date the true first day of employment, or is it the date HR set up the record?
- Has this person ever left and returned? If so, was the gap a full Sunday-to-Saturday week without a contract?
- Did they join through a transfer? If so, carry their pre-transfer start date across.
- Have there been long absences? Log sickness beyond 26 weeks, strike days, and unpaid career breaks separately, because they affect the calculation differently.
Store one authoritative continuous service start date per employee, separate from the contract date, and note the reason whenever the two differ. That single field is what your payroll, redundancy, and notice calculations should read from.
Frequently Asked Questions
Does probation affect continuous service?
No. Continuous service runs from the first day of employment regardless of whether the employee is still on probation. Probation is a contractual arrangement, not a statutory one, so it does not pause or delay the statutory clock in any way.
Does sick leave break continuous service?
Not usually. Under section 212 of the Employment Rights Act 1996, absence through sickness or injury preserves continuity for up to 26 weeks. Sickness absence while employed under a live contract simply counts as normal service. Our UK statutory sick pay guide covers the pay side.
If an employee resigns and comes back, do they keep their service?
Only if the gap does not include a complete week without a contract, or if a statutory exception applies. A Friday leaving date followed by a Monday return normally preserves continuity. A three-month gap normally resets it to zero.
Does continuous service affect annual leave entitlement?
Statutory annual leave does not depend on length of service. All workers accrue 5.6 weeks from day one. Many employers do offer extra contractual days at service milestones, and those sit entirely in your contract. See our UK annual leave entitlement guide for the statutory baseline.
Does agency work before a permanent role count?
Generally no, because during an agency assignment the worker usually has no contract of employment with the end client. If the agency period is followed by direct employment, continuity normally starts on the first day of the direct contract.
Track Service Dates Without the Spreadsheet Risk
Continuous service errors almost always start in the same place: a start date typed into a spreadsheet, copied into a second spreadsheet, and then quietly edited. Leave Balance holds one employee record with a single start date that drives leave accrual and service-based entitlements, so the number your managers see is the number your calculations use.
leave emails? Track your employee's leave with Leave Balance
Last updated: 26 July 2026. This article is general guidance, not legal advice. Continuous service thresholds are subject to legislative change. Verify the current position on gov.uk or with a qualified UK employment solicitor before acting on a specific case.