Every date that costs you money if you miss it
Pick a country and see when its tax year starts, what has to be filed, and what has to be paid. Each date links to the official page that publishes it.
Tax year runs
6 April to 5 April the following year
2025/26
Next date
5 October 2026
Register for Self Assessment, in 23 days
Dates we watch
10
Recurring dates for this country
HMRC deadlines do not move for weekends. If the last day is a Sunday, the money still has to clear by then.
Coming up next
Soonest first, counting from today.
Register for Self Assessment
5 October 2026 · in 23 days
Tell HMRC you need to file for the tax year that ended in April.
Who: New sole traders, landlords and anyone with untaxed income
GOV.UKPaper return deadline
31 October 2026 · in 49 days
Last day for a paper Self Assessment return.
Who: Paper filers · Form SA100
GOV.UKAsk to pay through your tax code
30 December 2026 · in 109 days
File online by now if you want up to 3,000 of tax collected through your PAYE code instead of in one lump.
Who: Employees who also file a return
GOV.UKOnline return and balancing payment
31 January 2027 · in 141 days
File online and pay the balance for the tax year that ended in April, plus your first payment on account.
Who: Everyone in Self Assessment · Form SA100
GOV.UKLate payment penalty bites
1 March 2027 · in 170 days
A 5 percent surcharge on tax still unpaid from 31 January.
Who: Anyone who has not paid
GOV.UK
Get an email before each deadline
Filing late costs money in penalties and interest. Sign in and Taxmiser will email you in good time.
Sign in to switch reminders onThe whole year, month by month
Sign in to mark each return as filed, or print this page and keep it nearby.
January
31 January
Online return and balancing payment
File something
February
Nothing due. A good month to get organised.
March
1 March
Late payment penalty bites
Pay something
April
5 April
Tax year ends
Year ends
6 April
New tax year starts
Year starts
May
31 May
P60 in your hands
Payroll paper
June
Nothing due. A good month to get organised.
July
6 July
P11D deadline
Payroll paper
31 July
Second payment on account
Pay something
August
Nothing due. A good month to get organised.
September
Nothing due. A good month to get organised.
October
5 October
Register for Self Assessment
File something
31 October
Paper return deadline
File something
November
Nothing due. A good month to get organised.
December
30 December
Ask to pay through your tax code
File something
Dates we are watching for changes
Budgets and rate announcements. When one of these comes round, we check the official page and update the figures your plan uses.
2025-11-26
Autumn Budget
Rates, allowances and thresholds for the tax year ahead are announced.
GOV.UK Budget collection2026-04-06
Start of the new tax year
New income tax bands, National Insurance, ISA and pension allowances take effect.
GOV.UK rates and allowances2027-01-31
Self Assessment filing deadline
Online returns and payment for the previous tax year are due.
GOV.UK Self Assessment deadlines
Turn dates into a plan
A deadline on its own does not save you money. Put your figures in and we will tell you what to do before each one comes round.