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

176 results for “ct600”Clear search
21 February 2026

Company Formation & Corporation Tax Registration

Step-by-step guide to registering for Corporation Tax after forming a limited company. Covers CT41G, UTR numbers, deadlines, and first CT600 filing.

corporation-taxcompany-formationregistrationct600hmrcnew-company
21 February 2026

Corporation Tax on Overseas Income: Guide

How UK companies pay corporation tax on overseas income. Covers foreign trading profits, dividends, rental income, double taxation relief, and CT600 reporting.

corporation taxoverseas incomeforeign incomedouble taxation reliefCT600UK companyinternational tax
21 February 2026

Company Tax Return (CT600) vs Annual Accounts: What's the Difference?

CT600 vs annual accounts: one goes to HMRC, one to Companies House. What each is, when they are due, and how they relate.

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21 February 2026

How to Appeal a CT600 Late Filing Penalty from HMRC

Got a CT600 late filing penalty? You may be able to appeal. Step-by-step guide to HMRC penalty appeals, reasonable excuses, and time limits.

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21 February 2026

How to File Your CT600 Yourself in 2026 (Complete DIY Guide)

File your CT600 without an accountant in 2026. What you need, how to prepare accounts, calculate tax, and submit to HMRC.

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21 February 2026

How Long Does HMRC Take to Process a CT600? Processing Times Explained

Find out how long HMRC takes to process your CT600 company tax return, when you'll get your tax calculation, and what to do if it's taking too long.

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21 February 2026

Do I Need to File a CT600? When Your Company Must Submit a Tax Return

Find out whether your limited company needs to file a CT600 Corporation Tax return with HMRC. Covers dormant companies, new companies, losses, and exemptions.

CT600corporation taxHMRClimited companyfiling requirements
21 February 2026

Corporation Tax for Startups: The Complete Guide for New Limited Companies

Corporation tax for startups. Registration, deadlines, expenses, R&D relief, first CT600 filing, and mistakes to avoid.

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21 February 2026

Can't Pay Your Corporation Tax? How to Set Up an HMRC Payment Plan

Can't afford your corporation tax bill? Learn how to set up an HMRC Time to Pay arrangement and avoid penalties.

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21 February 2026

CT600 for Contractors: Filing When You're Inside or Outside IR35

How IR35 status affects your CT600. Practical guide for contractors filing corporation tax — inside IR35, outside IR35, or mixed.

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21 February 2026

HMRC Enquiry Into Your CT600: What to Expect and How to Respond

Received an HMRC enquiry about your CT600? What triggers enquiries, your rights, what HMRC can ask, and how to respond.

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21 February 2026

Just Incorporated? Your First CT600 Timeline: Key Dates You Can't Miss

New limited company timeline: when to register for corporation tax, your first accounting period, CT600 deadline, and payment date.

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