Corporation Tax Quarterly Instalment Payments: Who Needs to Pay and When
Find out if your company must pay Corporation Tax in quarterly instalments (QIPs), including thresholds, payment dates, and calculation.
Plain-English guides to UK Corporation Tax and CT600 filing.
Find out if your company must pay Corporation Tax in quarterly instalments (QIPs), including thresholds, payment dates, and calculation.
Understand the merged R&D tax relief scheme for SMEs from April 2024, qualifying expenditure, enhanced rates, and which CT600 boxes to complete.
CT600 rejected by HMRC? Here are the most common rejection reasons — BVR errors, XML failures, mismatched data — and step-by-step instructions to fix and resubmit.
How iXBRL tagging works for CT600 filing — what gets tagged, HMRC requirements, common tagging errors, and how to generate iXBRL accounts without specialist software.
How dividends interact with Corporation Tax — paying dividends, receiving dividends, the dividend exemption, franked investment income, and CT600 reporting for UK companies.
How to claim capital allowances on your CT600 — AIA, writing down allowances, full expensing, first-year allowances, and which assets qualify for Corporation Tax relief.
All corporation tax deadlines for 2026 — CT600 filing dates, payment due dates, and penalties for late filing. Key dates for UK limited companies.
Find out whether you need an accountant for corporation tax or can file your CT600 yourself. Honest guide for UK limited company directors.
Compare every option for filing your CT600 — from accountants to DIY software — ranked by cost. Find the cheapest way to file your company tax return.
Compare Taxfiler and Taxpipe for CT600 filing — features, pricing, ease of use, and which suits your limited company best.
Understand corporation tax rates for small companies in 2025/2026, including the 19% and 25% thresholds, marginal relief calculation, and associated companies rules.
New limited company? Learn when to register for corporation tax, your first accounting period, filing deadlines, and how to avoid common first-year mistakes.