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

123 results for “Corporation Tax”Clear search
20 February 2026

How to Reduce Corporation Tax Legally: 12 Strategies for UK Companies

Discover 12 legal ways to reduce your corporation tax bill. From capital allowances to pension contributions, learn how to minimise what your company pays HMRC.

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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.

CT600checklistcorporation taxfilingdocumentspreparation
20 February 2026

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.

associated companiescorporation taxthresholdsmarginal reliefCT600tax rate
20 February 2026

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.

payment referencecorporation taxHMRCUTRpaymentdeadline
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 penalties (£100 to 10% surcharges), interest charges, how to appeal, and the fastest way to get back on track.

CT600penaltieslate filingHMRCcorporation taxdeadlines
19 February 2026

Corporation Tax for Contractors: IR35 and Your CT600

How IR35 affects your Corporation Tax return. Inside vs outside IR35, deemed payments, and guidance for contractor companies.

CT600IR35contractorscorporation taxoff-payroll workingdeemed payment
19 February 2026

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.

19 February 2026

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.

19 February 2026

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.

CT600amendmentscorporation taxHMRCmistakes
19 February 2026

Corporation Tax Allowable Expenses — The Complete List for Small Companies

Complete list of expenses your limited company can claim against Corporation Tax — from office costs to travel, with real examples.

corporation taxallowable expensestax deductionssmall business
19 February 2026

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.

accounting periodcorporation taxct600deadlinesfirst year
19 February 2026

How to Pay Corporation Tax to HMRC — All Payment Methods Explained

Step-by-step guide to paying your Corporation Tax bill. Bank details, payment references, deadlines, and what happens if you pay late.

corporation taxHMRCpaymenttax paymentdeadlines
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