BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CIS Books//Deadline Calendar 2026-27//EN
CALSCALE:GREGORIAN
X-WR-CALNAME:CIS Books — tax deadlines
BEGIN:VEVENT
UID:cis300-monthly@cisbooks.co.uk
DTSTART;VALUE=DATE:20260819
RRULE:FREQ=MONTHLY;BYMONTHDAY=19;COUNT=24
SUMMARY:CIS return (CIS300) due — if you pay subbies
DESCRIPTION:Monthly CIS contractor return for the month to the 5th. Automatic £100 penalty if late. cisbooks.co.uk/cis-deadlines/
BEGIN:VALARM
TRIGGER:-P3D
ACTION:DISPLAY
DESCRIPTION:CIS return due on the 19th
END:VALARM
END:VEVENT
BEGIN:VEVENT
UID:paye-cis-pay-monthly@cisbooks.co.uk
DTSTART;VALUE=DATE:20260822
RRULE:FREQ=MONTHLY;BYMONTHDAY=22;COUNT=24
SUMMARY:PAYE & CIS deductions payment due (electronic)
DESCRIPTION:Pay HMRC what you deducted. cisbooks.co.uk/cis-deadlines/
BEGIN:VALARM
TRIGGER:-P3D
ACTION:DISPLAY
DESCRIPTION:PAYE/CIS payment due on the 22nd
END:VALARM
END:VEVENT
BEGIN:VEVENT
UID:mtd-q2-2026@cisbooks.co.uk
DTSTART;VALUE=DATE:20261107
SUMMARY:MTD quarterly update due (6 Apr – 5 Oct)
DESCRIPTION:Cumulative update to HMRC. cisbooks.co.uk/cis-deadlines/
BEGIN:VALARM
TRIGGER:-P3D
ACTION:DISPLAY
DESCRIPTION:MTD update due 7 November
END:VALARM
END:VEVENT
BEGIN:VEVENT
UID:mtd-q3-2027@cisbooks.co.uk
DTSTART;VALUE=DATE:20270207
SUMMARY:MTD quarterly update due (6 Apr – 5 Jan)
DESCRIPTION:Cumulative update to HMRC. cisbooks.co.uk/cis-deadlines/
BEGIN:VALARM
TRIGGER:-P3D
ACTION:DISPLAY
DESCRIPTION:MTD update due 7 February
END:VALARM
END:VEVENT
BEGIN:VEVENT
UID:mtd-q4-2027@cisbooks.co.uk
DTSTART;VALUE=DATE:20270507
SUMMARY:MTD quarterly update due (full year 6 Apr – 5 Apr)
DESCRIPTION:Final quarterly update of 2026/27. cisbooks.co.uk/cis-deadlines/
BEGIN:VALARM
TRIGGER:-P3D
ACTION:DISPLAY
DESCRIPTION:MTD update due 7 May
END:VALARM
END:VEVENT
BEGIN:VEVENT
UID:sa-register-2026@cisbooks.co.uk
DTSTART;VALUE=DATE:20261005
SUMMARY:Register for Self Assessment (new in 2025/26)
DESCRIPTION:Only if you went self-employed in the 2025/26 tax year. cisbooks.co.uk/cis-deadlines/
END:VEVENT
BEGIN:VEVENT
UID:sa-final-2027@cisbooks.co.uk
DTSTART;VALUE=DATE:20270131
SUMMARY:Tax return + balancing payment + 1st payment on account
DESCRIPTION:2025/26 Self Assessment and payments. The January that hurts — unless you set aside monthly. cisbooks.co.uk/cis-deadlines/
BEGIN:VALARM
TRIGGER:-P14D
ACTION:DISPLAY
DESCRIPTION:31 January tax deadline in two weeks
END:VALARM
END:VEVENT
BEGIN:VEVENT
UID:sa-poa2-2027@cisbooks.co.uk
DTSTART;VALUE=DATE:20270731
SUMMARY:2nd payment on account due
DESCRIPTION:Second 2026/27 payment on account. cisbooks.co.uk/cis-deadlines/
BEGIN:VALARM
TRIGGER:-P7D
ACTION:DISPLAY
DESCRIPTION:Payment on account due 31 July
END:VALARM
END:VEVENT
END:VCALENDAR