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Plain-English guides to UK Corporation Tax and CT600 filing.

36 results for “deadline”Clear search
22 February 2026

CT600 Filing for First-Time Directors: Complete Beginner's Guide

Never filed a CT600 before? This step-by-step guide explains everything first-time directors need to know — deadlines, documents, iXBRL, and how to file for £59.

CT600first-time directorbeginner guidecorporation taxnew company
22 February 2026

HMRC CT600 Filing Service Closing: What Directors Must Do Before March 2026

HMRC's free CT600 filing service closes permanently on 31 March 2026. Here's your complete action plan — deadlines, penalties, and the cheapest alternative at £59.

CT600HMRCcorporation taxfiling deadlineHMRC closure
22 February 2026

Company Director Tax Responsibilities: What You Must Do (and When)

Every UK company director has legal tax obligations. This checklist covers corporation tax, PAYE, VAT, confirmation statements, and key deadlines.

company directortax responsibilitiesHMRCPAYEVATcorporation tax
22 February 2026

HMRC Free CT600 Filing Is Ending March 2026: What Are Your Options?

HMRC's free Corporation Tax Online service closes 31 March 2026. Here's what happens next and the cheapest ways to file your CT600 after the deadline.

HMRCCT600free filing endingcorporation tax software2026
22 February 2026

Filing Annual Accounts at Companies House: Complete Guide for Limited Companies

Everything you need to know about filing your company's annual accounts at Companies House — deadlines, formats, micro-entity vs small company, and penalties.

Companies Houseannual accountsiXBRLfilinglimited company
22 February 2026

First Year Corporation Tax: What New Limited Companies Need to Know

Just incorporated? Here's your complete guide to corporation tax in your first year — registration, deadlines, what to file, and how to pay.

corporation taxnew companyfirst CT600limited companyHMRC registration
22 February 2026

How to Pay Corporation Tax: Complete HMRC Payment Guide 2025/26

Step-by-step guide to paying your corporation tax bill. Covers all payment methods, deadlines, payment references, and what happens if you pay late.

corporation taxHMRC paymentpayment referenceCT600tax deadline
22 February 2026

How to Amend a CT600 Tax Return: Correcting Mistakes After Filing

Made an error on your CT600? Learn how to amend your corporation tax return within the 12-month deadline, what changes HMRC allows, and the step-by-step process.

CT600HMRCamendmentscorporation taxtax return corrections
21 February 2026

CT600 Deadline: When to File Your Corporation Tax Return (and When to Pay)

When is your CT600 due? Filing deadlines, payment deadlines, and how they differ from Companies House deadlines. Avoid late penalties.

21 February 2026

Corporation Tax Deadlines 2026: When You Need to File and Pay

All corporation tax deadlines for 2026 — CT600 filing dates, payment due dates, and penalties for late filing. Key dates for UK limited companies.

corporation-taxdeadlines2026ct600penaltieshmrcfiling
21 February 2026

First Year Corporation Tax: A Complete Guide for New Companies

New limited company? Learn when to register for corporation tax, your first accounting period, filing deadlines, and how to avoid common first-year mistakes.

first year corporation taxnew companyCT600company registrationHMRC
21 February 2026

CT600 Nil Return: How to File When Your Company Has No Trading Activity

Learn how and when to file a CT600 nil return for a dormant or non-trading company, including deadlines, penalties, and step-by-step guidance.

ct600nil-returndormant-companycorporation-taxhmrc
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