Personal admin
When is Self Assessment deadline 2027?
Less deadline drama. More ready-to-file.
Self Assessment deadline is Sunday, 31 January 2027.
Filing and payment deadlines can differ. Check your own deadlines with HMRC.
Date source: GOV.UK
The calendar file includes a reminder one day before. You can change or remove it in your calendar app.
A little head start
Make it your own
Keep the published Self Assessment marker visible while you organise your own return.
Check which filing and payment deadlines apply to you.
Gather your records before you sit down to file.
Use your HMRC account for your individual position.
One occasion. Your choice.
Add it to My Dates, then choose whether it belongs in your calendar. SMS reminders are a separate option.