Business deadline guide

UK business deadline calendar for first-time owners

Business deadlines can feel scattered because different organisations handle different duties. Companies House deals with company filing, while HMRC deals with tax, VAT, PAYE and Self Assessment. This guide explains the main deadlines to know so you can build a simple calendar and avoid last-minute surprises.

Written by the Business Sorted editorial team · Reviewed 18 July 2026

Last reviewed: 18 July 2026
Next review: Within 3 months, or sooner if official guidance changes.
Primary sources checked: HMRC, Companies House, Running a limited company

Business Sorted is not HMRC, Companies House, an accountant or a legal adviser. Use this guide to understand the topic, then check the official source and get professional advice when your situation needs it.

Need to know in 30 seconds

The safest next step is to identify whether this applies to your business, check the official source and set a preparation reminder before the filing or payment date.

What it is

A business deadline calendar is a practical list of filing, reporting and payment dates. It is not a substitute for advice, but it helps you see what needs attention and which official source explains it.

Who it applies to

This guide is for first-time UK business owners, including sole traders, limited company directors and employers who want a clearer view of recurring administration.

Why it matters

This topic matters because missed filings, unclear records or late payments can create avoidable admin, penalties, interest or extra support work. A simple reminder is useful only when it is tied to the correct official source.

When it applies

Deadlines depend on your business structure, accounting dates, VAT registration, PAYE setup and whether you need to file a Self Assessment tax return.

Important deadlines

Confirmation statement: usually every 12 months for limited companies.
Annual accounts: normally due to Companies House after the company financial year ends.
Corporation Tax return: usually due 12 months after the accounting period ends.
Corporation Tax payment: often due before the return filing deadline.
VAT Returns and payments: usually quarterly, unless HMRC has agreed a different scheme.
PAYE: payroll reporting is usually on or before employees are paid.
Self Assessment: key online filing and payment deadlines normally fall in January.

Preparation checklist

Confirm whether this applies: This guide is for first-time UK business owners, including sole traders, limited company directors and employers who want a clearer view of recurring administration.
Open the relevant HMRC or Companies House account before acting.
Collect records, dates and reference numbers that support the filing.
Set a preparation reminder before the deadline, not only on the deadline.
Save submission receipts, payment references and source links.

Realistic example

A first-time owner reads the Deadline calendar guide after receiving a reminder or official message. They check whether the duty applies, note the relevant date from the official account, gather the records listed in the source guidance and save evidence after filing or paying.

This example is deliberately general because actual dates and duties can change with your company history, tax registrations, accounting period and HMRC or Companies House notices.

Common mistakes

Treating all tax and filing deadlines as the same date.
Forgetting that payment and filing deadlines can be different.
Relying on memory instead of a calendar and source links.
Missing Companies House letters or HMRC online account messages.

Penalties and risk

Late filing or payment can lead to penalties, interest, restrictions or further compliance checks. The exact result depends on the duty, the delay and your circumstances, so check the relevant official guidance.

Common myths

If no money changed hands, no filings can be due.
Companies House and HMRC deadlines are always the same.
A reminder calendar can replace checking the official account.
Filing a form always means any related payment has also been made.

How to use it

Start with your business structure, then add dates from Companies House and HMRC. Keep the source link with each task so you can check the wording before you file or pay.

Why dates vary

Limited company dates often depend on incorporation and accounting periods. VAT and PAYE dates depend on how HMRC has set up the account. Sole trader Self Assessment dates follow the tax year.

Frequently asked questions

Are all UK business deadlines the same for every business?

No. Deadlines depend on your business structure, registrations, accounting dates and HMRC or Companies House requirements.

Should I rely only on a calendar reminder?

No. Use reminders, but keep official source links with each task so you can check the latest wording before acting.

Video explainer

This guide is ready for a 2-minute explainer and 5-minute walkthrough. No video is embedded until Business Sorted has a reviewed transcript that matches the official-source guidance.

Transcript outline

1. What Deadline calendar means.
2. Who should check whether it applies.
3. Which dates and records to prepare.
4. Which official sources to open before acting.

Turn business deadlines into a clear task list

Business Sorted helps first-time UK business owners see what needs doing, when it is due and which official source to check before acting.

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