Limited Company Expenses You Can Claim
Complete guide to allowable limited company expenses for Corporation Tax. Covers office costs, travel, staff, professional fees, and what HMRC disallows.
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Plain-English guides to UK Corporation Tax and CT600 filing.
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Pension Contributions & Corporation Tax Relief
How employer pension contributions reduce your CT600 corporation tax bill. Limits, timing rules, and how to claim the deduction for your limited company.
R&D Tax Credits for SMEs: Complete Guide to Claiming
How UK small and medium-sized companies can claim R&D tax credits. Covers eligibility, qualifying costs, calculation examples, the merged scheme, and how to include R&D relief on your CT600.
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.
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.
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.
Free CT600 Filing Software: What Are Your Options in 2026?
Free CT600 filing software compared. HMRC's free filing service closed in March 2026 — here's what it offered and what to use instead.
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.
Making Tax Digital for Corporation Tax: What Your Company Needs to Know
HMRC cancelled Making Tax Digital for Corporation Tax in July 2025. Here's what happened, what it means for your company, and what filing changes do affect you now.
Every Corporation Tax Relief Available to UK Companies (2025/26 Complete List)
Every corporation tax relief for UK companies in 2025/26 — R&D, creative industry, patent box, capital allowances, and more.
Corporation Tax Group Relief: How to Share Losses Between Companies
How to use corporation tax group relief to share losses between companies. 75% ownership test, consortium relief, and filing.
Corporation Tax Refund: How to Claim Back Overpaid Tax from HMRC
How to claim a corporation tax refund from HMRC. Covers overpayment, amended returns, loss carry-back, and how long refunds take.