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April Leave Year Carryover Deadline Calculator

Based on the default pattern below, a typical deadline is September 2028. Adjust the inputs for your exact figure.

Carryover deadline

September 2028

How it's worked out

March 2027 leave year end + 18 months = September 2028

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

March 2027 leave year end + 18 months = September 2028

Frequently asked questions

Why do some UK employers use an April leave year instead of calendar year?
Many align the leave year with the UK tax year (6 April to 5 April) for payroll simplicity, rather than running January to December.
How does the deadline change on an April leave year?
The 18-month statutory carryover window still applies — it's just measured from the end of your April-aligned leave year (commonly March) rather than December.
Where do I check which leave year my employer uses?
Your contract, staff handbook or HR system should state your leave year start and end dates — enter the end month and year here to get your specific deadline.