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

71 results for “NI”Clear search
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.

corporation taxproperty companybuy to letlandlordCT600
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.

corporation taxtax planninglimited companyallowable expenses
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
19 February 2026

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.

capital allowancesAIAplant and machineryCT600tax reliefcorporation taxfull expensing
19 February 2026

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.

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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

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.

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

Capital Allowances for Small Companies — AIA, Full Expensing & Cars

How to claim capital allowances on your CT600. AIA, full expensing, car rules, and writing down allowances for small companies.

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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.

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12 February 2026

What Records Do I Need for My Company Tax Return?

Complete checklist of records and documents needed for CT600 filing. How long to keep them, what HMRC expects, and how to organize everything.

ct600record keepingdocumentsHMRC requirements
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