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Long-Term Sick Leave Carryover Deadline Calculator

Based on the default pattern below, a typical deadline is June 2027. Adjust the inputs for your exact figure.

Carryover deadline

June 2027

How it's worked out

December 2025 leave year end + 18 months = June 2027

Audit note

The 18-month statutory deadline applies to Reg 13 carryover from long-term sickness or family leave specifically, and runs from the END of the leave year it accrued in — not from the date it was accrued. Contractual deadlines can be shorter, but can never override the statutory 18-month floor for protected leave.

Stop tracking this by hand

Carryover only stays accurate if the balance behind it is accurate. Tempry tracks every day of accrued, taken and carried-over leave automatically, so nobody has to work out a carryover cap or a forfeiture deadline by hand again.

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Different scenario? Try the full holiday carryover calculator

How this calculation works

Carried-over leave isn't open-ended — work out the exact month and year it must be used by, whether it's protected sick-leave carryover (18 months) or your employer's own policy deadline.

Worked example

December 2025 leave year end + 18 months = June 2027

Frequently asked questions

When exactly does carried-over sick leave holiday expire?
18 months after the end of the leave year in which it accrued — if your leave year ends December 2025, carried-over leave must be used by June 2027.
Does the 18 months start from when I fell ill?
No — it starts from the end of the leave year the leave accrued in, not from your first day of sickness absence.
What happens if I'm still off sick when the deadline arrives?
The statutory position is that the leave is capped at 18 months' carryover; if you remain unable to take it beyond that point, get specific advice, as case law in this area continues to develop.