An annual leave reminder email helps employees use their entitlement before it expires and reduces the employer’s accrued leave liability. In the UK, the Working Time Regulations 1998 allow employers to cap carryover or enforce a use-it-or-lose-it policy — but only if employees have had a genuine opportunity to take their leave. A well-timed reminder campaign protects both the employee (who gets their rest) and the employer (who avoids a last-minute December rush or a large carryover liability).
Key Takeaways
- UK employers can require employees to use annual leave by a specific date, as long as they give adequate notice (at least twice the length of the leave being directed).
- The holiday year-end is the most common deadline — but mid-year nudges are more effective than a single final reminder.
- Employees with large carryover balances represent a financial liability — see our guide on excessive leave balance liability.
- A reminder email should include the employee’s current balance, the deadline, and clear instructions for booking.
- For rolled-up holiday pay arrangements (irregular hours workers), different rules apply under the new 2024 calculations.
Template 1: Mid-Year Balance Reminder (Friendly Nudge)
Send this 4-6 months before the holiday year-end, when there’s still plenty of time to plan.
Subject: Your Annual Leave Balance — [Number] Days Remaining
Hi [Employee Name],
Just a friendly reminder that you have [X] days of annual leave remaining for this holiday year ([Holiday Year End Date]).
With several months still to go, now is a great time to plan any remaining time off. Booking early also helps the team plan cover.
You can check your balance and book leave through [Leave Management System / speak to your manager].
If you have any questions about your entitlement or the booking process, please let me know.
Best regards,
[Your Name]A mid-year nudge is low-pressure and gives the employee plenty of time to plan. It’s also the least likely to trigger “use-it-or-lose-it” disputes because the deadline is still months away.
Template 2: Pre-Deadline Reminder (3-4 Weeks Before Year-End)
For employees who still have significant leave remaining close to the deadline.
Subject: Reminder — Use Your Remaining Annual Leave Before [Deadline]
Hi [Employee Name],
This is a reminder that you currently have [X] days of annual leave remaining, which must be taken by [Holiday Year-End Date].
To help you plan, here are the remaining weeks of the holiday year:
- [Week starting Date] — [Availability status]
- [Week starting Date] — [Availability status]
- [Week starting Date] — [Availability status]
Please book your remaining leave through [system name] or speak to [Manager Name] as soon as possible. If you need support finding dates that work, we're happy to help.
If you are unable to take all your remaining leave before the deadline, please let us know and we can discuss [carryover / unpaid leave options] if available.
Best regards,
[Your Name]At this stage, some employees may need help finding dates that work around operational needs. Offering proactive support reduces the risk of disputes about being unable to book.
Template 3: Final Deadline Reminder (1-2 Weeks Before Year-End)
This is the most urgent communication and the most likely to generate last-minute bookings.
Subject: Final Reminder — Book Your Annual Leave by [Deadline]
Hi [Employee Name],
This is your final reminder that you have [X] days of annual leave remaining, which must be taken by [Holiday Year-End Date], which is [X] working days away.
If you do not book your leave by the deadline, [your remaining leave will be forfeited in accordance with our policy / you may carry over [Y] days maximum / please contact HR to discuss your options].
Please book any remaining leave [in the system / by contacting your manager] immediately. If you are unable to work out suitable dates, please speak to [Manager Name] or [HR Contact] today.
Best regards,
[Your Name]For UK employers, a policy of forfeiting unused leave at year-end is enforceable as long as employees had a genuine opportunity to take it. The key is having sent timely reminders — like these templates — to demonstrate that the employee was given the chance.
Template 4: Large Balance Warning (Manager Alert)
For employees carrying a high balance that creates financial liability for the business.
Subject: Action Required — [Employee Name] — High Leave Balance
Hi [Manager Name],
This is an automated alert that [Employee Name] currently has [X] days of annual leave accrued, representing a high carryover balance.
The estimated accrued leave liability for this employee is £[amount].
Please speak to [Employee Name] to agree on a plan to reduce their leave balance before the holiday year-end. Consider:
- Block booking a period of leave before the deadline
- Agreeing on specific dates for the remaining leave
- Discussing whether a carryover arrangement is appropriate
If the balance cannot be reduced before the year-end, please contact HR to discuss carryover approval or a [leave payout](/blog/leave-payout-calculator-termination/).
Best regards,
[Leave Balance Team]This template is for internal use between managers and HR. The UK’s Employment Rights Act 1996 does not place a specific cap on carryover, but employers who allow large balances to accumulate may face financial risk if the employee leaves — see our guide on leave liability during redundancy.
Template 5: Holiday Year-End Confirmation (Post-Deadline)
After the year-end, confirm the carryover position for each employee.
Subject: Your Annual Leave — New Holiday Year Summary
Hi [Employee Name],
The [Previous Year] holiday year ended on [Date]. Here's your carryover summary:
Leave remaining at year-end: [X] days
Carryover allowed (per policy): [Y] days maximum
Carried forward to new year: [Z] days
Your new holiday year started on [New Year Start Date] with an entitlement of [A] days plus [Z] carried forward, giving you [Total] days for the current year.
Please plan your leave for the current year early to ensure you can take your full entitlement.
Best regards,
[Your Name]How to Run a Leave Reminder Campaign
Effective leave nudges follow a cadence:
- Mid-year (4-6 months before deadline) — friendly reminder, no urgency
- Pre-deadline (3-4 weeks before) — specific numbers and call to action
- Final (1-2 weeks before) — urgent, clear consequences
- Year-end confirmation — clean start for the new year
Most leave management systems — including Leave Balance — can automate these reminders. The key is consistency: send the same prompts to every employee with a balance above a set threshold.
For UK employers, the Working Time Regulations 1998 require that:
- Employees have the right to 5.6 weeks’ paid annual leave (28 days for a full-time employee)
- The employer can determine when leave is taken, including requiring it to be taken by a specific date
- The employer must give notice of at least twice the length of the leave being directed
FAQ
Can annual leave be forfeited if not taken by year-end?
Yes, in the UK, if the employer has given the employee a genuine opportunity to take their leave (including adequate notice and reasonable flexibility), unused leave can be forfeited at year-end. However, the employer must be able to demonstrate that the opportunity was genuine — which is where timely reminders are essential.
How much carryover should I allow?
Most UK employers cap carryover at 5 days (one working week) or the statutory minimum (4 weeks under EU-derived law). The Working Time Regulations allow carryover only in limited circumstances — chiefly sickness absence and maternity leave.
What about employees on sick leave who can’t take annual leave?
If an employee is unable to take annual leave due to sickness, they have the right to carry over their leave into the next holiday year under the EU Working Time Directive. This is a complex area — see our guide on accruing annual leave while on sick leave.
Should I nudge different employee groups differently?
Yes. Remote or hybrid workers may need more proactive reminders, as they’re less likely to have informal conversations about leave plans. Similarly, new starters, employees returning from maternity leave, and those on long-term sick leave should receive tailored communications.
Can I force an employee to take leave on specific dates?
Yes — the employer can direct employees to take annual leave on specific dates by giving twice the amount of notice as the leave period. This is commonly used for Christmas shutdown periods.