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

48 results for “corporation-tax”Clear search
23 February 2026

Sole Trader vs Limited Company Tax: Which Saves You More in 2025/26?

Complete tax comparison between sole trader and limited company structures. Income tax vs corporation tax, national insurance, dividends, and the crossover point.

corporation-taxsole-traderlimited-companytax-planning
23 February 2026

Sole Trader vs Limited Company: Tax Comparison 2025/26

Detailed tax comparison between operating as a sole trader vs limited company in 2025/26. Income Tax vs Corporation Tax, National Insurance, dividends, and when to incorporate.

corporation-taxsole-traderlimited-companytax-comparisonincorporation
23 February 2026

HMRC Government Gateway for Corporation Tax: Setup & Navigation Guide

Step-by-step guide to setting up and using HMRC Government Gateway for Corporation Tax. How to register, enrol for CT, view your account, and manage your tax.

hmrcgovernment-gatewaycorporation-taxguide
23 February 2026

R&D Tax Credits for Small Companies: Save Up to 27% on Innovation Costs

How SME R&D tax relief works for small companies. Qualifying activities, how to calculate the benefit, and reporting on your CT600.

ct600r-and-dtax-creditscorporation-taxinnovation
23 February 2026

Corporation Tax for Landlords: Running a Property Company in 2025/26

Complete guide to Corporation Tax for property investment companies. Buy-to-let through a limited company, allowable expenses, mortgage interest relief, and CT600 filing.

ct600propertylandlordcorporation-taxbuy-to-let
23 February 2026

IR35 & Off-Payroll Rules: How They Affect Your Corporation Tax

How IR35 and off-payroll working rules impact your limited company CT600. Inside vs outside IR35, deemed payments, and tax implications explained.

ct600ir35corporation-taxcontractors
23 February 2026

Changing Your Company Year End: CT600 & Tax Implications

How changing your accounting reference date affects your CT600 filing. Short periods, HMRC notification, and tax planning opportunities.

ct600year-endaccounting-periodcorporation-tax
23 February 2026

CT600 Filing Deadline Calculator: When Is Your Return Due?

Calculate your CT600 filing deadline and Corporation Tax payment deadline. Different deadlines explained with examples for various accounting periods.

ct600deadlinehmrccorporation-tax
23 February 2026

HMRC Enquiry Into Your Corporation Tax Return: What to Expect

What happens if HMRC opens an enquiry into your CT600. Your rights, the process, time limits, and how to respond.

ct600hmrcenquirycorporation-taxcompliance
23 February 2026

Corporation Tax Rates 2025/26: Small Company Guide (19% vs 25%)

Complete guide to Corporation Tax rates for 2025/26. How the 19% small profits rate and 25% main rate work, marginal relief explained with examples.

corporation-taxtax-ratessmall-businessmarginal-relief2025-26
23 February 2026

How to Pay Corporation Tax: Every Payment Method Explained

All the ways to pay your Corporation Tax to HMRC — bank transfer, direct debit, online, and by post. Processing times and payment references explained.

corporation-taxhmrcpaymentguide
23 February 2026

CT600 Box by Box Guide 2025/26: Every Box Explained

Comprehensive CT600 box-by-box guide for 2025/26. What goes in each box, common mistakes, and worked examples for every section of the Corporation Tax return.

ct600guidehmrccorporation-taxboxes
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