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

100 results for “filing”Clear search
21 February 2026

How to File a Nil CT600 Return for a Dormant Company

Step-by-step guide to filing a nil Corporation Tax return for your dormant limited company. Avoid penalties — even dormant companies must file with HMRC.

CT600dormant companynil returnHMRCcorporation tax
21 February 2026

Corporation Tax for Freelancers: A Complete Guide for Limited Company Contractors

Corporation tax guide for freelancers with a limited company. Covers allowable expenses, IR35, dividends, and filing your CT600.

corporation taxfreelancercontractorlimited companyIR35
21 February 2026

Corporation Tax Penalties & Interest Charges

Understand HMRC corporation tax penalties for late filing and payment, how interest is calculated, and how to appeal. Complete guide for UK company directors.

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20 February 2026

Corporation Tax for Property Companies: A Complete Landlord Guide

Corporation tax for property companies. Mortgage interest relief, capital gains, allowable expenses, and filing your CT600.

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20 February 2026

How to File Your CT600 Without an Accountant — Complete Guide

Step-by-step guide to filing your CT600 without an accountant. What you need, how to calculate tax, and how to avoid mistakes.

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20 February 2026

CT600 Filing Checklist — Everything You Need Before You Start

Complete checklist of every document, figure, and detail you need to file your Corporation Tax return. Print it, tick it off, file in 15 minutes.

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20 February 2026

Best CT600 Filing Software UK 2026 — Compared

HMRC's free filing tool closes March 2026. Compare the best CT600 filing software options — prices, features, and which one suits your company.

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19 February 2026

What Happens If You Don't File Corporation Tax? Penalties, Interest, and How to Fix It

Missed your CT600 deadline? Learn about HMRC late filing penalties (fixed penalties escalating to 10% tax surcharges), interest charges, how to appeal, and the fastest way to get back on track.

CT600penaltieslate filingHMRCcorporation taxdeadlines
19 February 2026

Your First Company Tax Return — A New Director's Guide to CT600 Filing

Just set up a limited company? Everything you need to know about your first CT600 — when it is due, what to include, and how to file.

ct600new companyfirst tax returncorporation taxbeginners
19 February 2026

Dormant Company CT600 Filing: Do You Still Need to File? (Yes — Here's How)

Your dormant company still needs to file a CT600 with HMRC. Learn what counts as dormant, how to file, and the fastest way to stay compliant for just £59 + VAT.

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19 February 2026

10 Common CT600 Mistakes (and How to Avoid Them)

The most frequent errors company directors make when filing their CT600. From wrong dates to missing boxes — and how to get it right first time.

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12 February 2026

CT600 Deadline: When Is Your Company Tax Return Due?

When is your CT600 due? Your company tax return deadline is 12 months after the accounting period ends. Late filing means automatic penalties.

CT600Deadlines
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