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

71 results for “NI”Clear search
23 February 2026

Micro-Entity Accounts: What They Are and How to File with Your CT600

Complete guide to micro-entity accounts for UK limited companies. Learn the qualifying thresholds, what to include, FRS 105 requirements, and how they work with your CT600 filing.

micro-entityaccountsCT600FRS 105Companies HouseiXBRLlimited companyannual accounts
22 February 2026

CT600 for Property Companies: Landlord Corporation Tax Guide 2026

Complete guide to filing CT600 for property investment companies. Covers rental income reporting, mortgage interest deductions, capital allowances on furnishings, property disposal gains, and step-by-step filing instructions for buy-to-let landlords.

property companybuy-to-letlandlordCT600corporation taxrental incomemortgage interestcapital allowances
22 February 2026

Filing CT600 Without an Accountant: Is It Safe? A Step-by-Step Guide

Can you safely file your CT600 without an accountant? Yes for simple companies. When DIY filing is safe, when to get help, and how to do it step by step.

ct600diy filingno accountantcorporation taxstep by step
22 February 2026

CT600 Box-by-Box Guide: Which Boxes Do You Actually Need to Fill In?

A plain English guide to the CT600 boxes that matter for small companies. Learn which boxes to fill in, which to skip, and how to avoid common mistakes.

ct600box guidehow tofiling guidecorporation taxsmall company
22 February 2026

Do I Need to File a CT600 If My Company Made No Profit?

Yes — even if your company made no profit, you almost certainly need to file a CT600. Learn about nil returns, dormant companies, and how to file for £59.

ct600nil returndormant companyno profitcorporation taxfiling
22 February 2026

Best CT600 Software for Limited Companies (2026 Comparison)

Comparing the best CT600 corporation tax software for UK limited companies in 2026. Pricing, features, and which one is right for your business.

CT600 softwarelimited companiescorporation taxcomparison2026HMRC
22 February 2026

Filing Annual Accounts at Companies House: Complete Guide for Limited Companies

Everything you need to know about filing your company's annual accounts at Companies House — deadlines, formats, micro-entity vs small company, and penalties.

Companies Houseannual accountsiXBRLfilinglimited company
22 February 2026

First Year Corporation Tax: What New Limited Companies Need to Know

Just incorporated? Here's your complete guide to corporation tax in your first year — registration, deadlines, what to file, and how to pay.

corporation taxnew companyfirst CT600limited companyHMRC registration
22 February 2026

Best Alternatives to HMRC's Free Filing Service in 2026

HMRC's free CT600 filing tool closes March 2026. Compare the best alternatives: Taxpipe (£59), accountants, and full accounting software for UK limited companies.

hmrcct600alternativessoftware2026
21 February 2026

CT600 Deadline: When to File Your Corporation Tax Return (and When to Pay)

When is your CT600 due? Filing deadlines, payment deadlines, and how they differ from Companies House deadlines. Avoid late penalties.

21 February 2026

CT600 Box-by-Box Guide: Every Core Box Explained (2025/26)

Complete walkthrough of every CT600 box from 1 to 620. Plain English explanations, what to enter, and which boxes most small companies actually use.

21 February 2026

Dormant Company Corporation Tax: Do You Need to File a CT600?

Find out if your dormant company must file a CT600 with HMRC. When you're exempt, when you must file, and how to submit a nil return.

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