Associated Companies — How They Affect Your Corporation Tax Rate
How associated companies change your Corporation Tax thresholds. What counts, what doesn't, dormant company exemption, and how to report them on your CT600.
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Plain-English guides to UK Corporation Tax and CT600 filing.
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Corporation Tax Payment Reference — How to Pay HMRC Correctly
How to construct your Corporation Tax payment reference, HMRC bank details, payment methods, and what to do if you use the wrong reference.
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.
Annual Investment Allowance (AIA): Claim Up to £1 Million in Tax Relief
How to claim AIA on your CT600 for plant and machinery purchases. What qualifies, what doesn't, and common mistakes that cost small companies money.
Dividends vs Salary: The Tax-Efficient Way to Pay Yourself
How to optimise your salary and dividends mix as a limited company director. Save thousands in tax with the right strategy — and how it affects your CT600.
What Happens If You Don't File Corporation Tax? Penalties, Interest, and How to Fix It
Missed your CT600 deadline? Learn about HMRC penalties (£100 to 10% surcharges), interest charges, how to appeal, and the fastest way to get back on track.
R&D Tax Relief for Small Companies: What to Claim on Your CT600
R&D tax credits for SMEs: what qualifies, how to calculate the relief, and which CT600 boxes to complete. Plain English guide.
Corporation Tax Losses: How to Carry Forward and Carry Back Losses
How to use trading losses on your CT600 return. Carry forward, carry back, group relief, and which CT600 boxes to complete for loss relief claims.
How to Register for Corporation Tax: Step-by-Step Guide for New Companies
Complete guide to registering your limited company for corporation tax with HMRC. Deadlines, what you need, UTR numbers, and what happens after registration.
How to Amend a CT600 — Correcting Mistakes on Your Corporation Tax Return
Filed your CT600 and spotted an error? Here's how to amend your Corporation Tax return, the time limits, and what happens if HMRC finds the mistake first.
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.
Accounting Periods Explained — When Does Your Corporation Tax Year Start and End?
What is an accounting period for Corporation Tax? How to work out your dates, what happens in your first year, and how periods affect your CT600 deadlines.