Self Assessment Deadline 2026 Explained
What the 2026 Self Assessment deadlines mean, which tax year they apply to, and the key dates sole traders and landlords usually need to track.
Audience: Sole traders and landlords
Last reviewed: 16 March 2026
UK filing deadlines and tax deadlines
Plain-English guidance on Self Assessment deadlines, Companies House filing dates, VAT return deadlines and landlord tax obligations — backed by official sources and structured for quick action.
Free UK filing calendar download
Download the PDF calendar covering key Self Assessment, Companies House, Corporation Tax and VAT dates. Use it as a high-level reminder sheet, then confirm your own filing dates with HMRC or Companies House.
What is inside
Who it is for
FilingFriend is written for practical people who want deadlines, filing rules and tax admin explained clearly without digging through multiple GOV.UK pages first.
Plain-English help with Self Assessment deadlines, registration, payments on account and record keeping.
Clear guidance on rental income deadlines, Self Assessment and Making Tax Digital changes affecting landlords.
A calmer view of annual accounts, confirmation statements, Corporation Tax and Companies House changes.
What you can use now
The site is structured around the search intents people actually have: finding a filing date, understanding what the rule means, checking penalties and downloading a quick-reference calendar.
Start on the deadlines page for a quick view of Self Assessment, Companies House, VAT and landlord tax dates.
Each guide explains the official rule in practical language before linking to the source.
The free PDF keeps the headline dates visible, while the guides explain the detail behind them.
Featured guides
The first guide set covers Self Assessment, limited company filing deadlines, VAT, landlord reporting and current Companies House changes.
What the 2026 Self Assessment deadlines mean, which tax year they apply to, and the key dates sole traders and landlords usually need to track.
Audience: Sole traders and landlords
Last reviewed: 16 March 2026
A clear guide to the 5 October registration deadline, who it affects, and how it fits with filing your first return.
Audience: New sole traders and landlords
Last reviewed: 16 March 2026
The core deadlines small UK limited companies usually track, including accounts, Corporation Tax, and confirmation statements.
Audience: Small limited company directors
Last reviewed: 16 March 2026
What a confirmation statement does, when it is due, and why it is different from annual accounts.
Audience: Limited company directors
Last reviewed: 16 March 2026
A plain-English guide to when Corporation Tax is usually due, when the Company Tax Return must be filed, and why those deadlines differ.
Audience: Limited company directors
Last reviewed: 16 March 2026
How UK VAT return deadlines usually work, when payment is due, and the timing rule most VAT-registered businesses need to know.
Audience: VAT-registered businesses
Last reviewed: 16 March 2026
Key deadlines
Use this as a fast reference, then click through to the related guide for the surrounding rule, timing and source.
| Deadline | Timing | Who it affects | Source | Urgency |
|---|---|---|---|---|
Register for Self Assessment If you need to file for the first time, HMRC says you must tell them by 5 October after the end of the tax year in which you became liable. | 5 October after the end of the relevant tax year | New Self Assessment filers | HMRC: Register for Self Assessment | High |
Paper Self Assessment return HMRC's paper deadline is earlier than the online deadline, so paper filers need to be ready sooner. | 31 October after the end of the tax year | Taxpayers filing on paper | HMRC: Self Assessment tax returns deadlines | Medium |
Online Self Assessment return and balancing payment This is HMRC's main online filing deadline and is also the usual deadline for the balancing payment. | 31 January after the end of the tax year | Online Self Assessment filers | HMRC: Self Assessment tax returns deadlines | High |
Second payment on account If payments on account apply to you, HMRC says the second payment is usually due on 31 July. | 31 July | Self Assessment taxpayers who make payments on account | HMRC: Self Assessment tax returns deadlines | High |
Free download
A single PDF with the main dates covered on FilingFriend, designed for sole traders, landlords, and small company directors who want one clear yearly view.
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Important: FilingFriend provides general informational guidance about UK filing requirements. It does not provide tax, accounting, or legal advice. Always confirm requirements with HMRC or Companies House.
FAQ
It is designed for UK sole traders, landlords, self-employed professionals and small limited company directors who want filing deadlines and compliance guidance explained clearly.
The site focuses on UK filing deadlines such as Self Assessment, Companies House annual accounts and confirmation statements, VAT returns, landlord tax dates and related compliance changes.
No. FilingFriend is general informational guidance only and does not replace qualified tax, accounting or legal advice.