File CT600 After HMRC Free Service Closes (2026)
HMRC's free CT600 service closed on 31 March 2026. Step-by-step guide to filing your corporation tax return from April 2026 using commercial software.
Plain-English guides to UK Corporation Tax and CT600 filing.
HMRC's free CT600 service closed on 31 March 2026. Step-by-step guide to filing your corporation tax return from April 2026 using commercial software.
Miss your CT600 deadline and HMRC charges escalating penalties — from £200 on day one for filing dates from April 2026, rising to 10% of unpaid tax. Learn the full penalty structure, appeal options, and how to file on time.
HMRC withdrew its free CT600 filing service on 31 March 2026. Learn what this means for your company, your options for filing going forward, and how to switch to affordable software.
Complete guide to claiming R&D tax credits on your CT600. Covers the merged R&D scheme, qualifying expenditure, CT600L supplementary page, HMRC compliance checks, and cash credits vs tax reduction.
Complete guide to filing CT600 for Amazon, eBay, and e-commerce sellers operating through a limited company. Covers stock valuation, platform fees, VAT interaction, international sales, FBA considerations, and step-by-step filing instructions.
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.
Complete guide to filing your CT600 as a contractor or freelancer operating through a PSC. Covers IR35 implications, dividend vs salary tax efficiency, expense claims, and step-by-step filing instructions.
Honest head-to-head comparison of TaxCalc vs Taxpipe for CT600 filing. Features, pricing, ease of use — which is right for your company?
Missed your CT600 deadline? Learn the exact HMRC penalty structure — £200 initial then 10% and a further 10% for filing dates from April 2026 — how late payment interest works at 7.75%, and the steps to fix it fast. Plus how to appeal.
Compare CT600 filing costs in 2026: Taxpipe at £59 vs accountants at £200-500+ vs HMRC's free service (closed 31 March 2026). Real prices, real scenarios, real savings.
HMRC's free CT600 filing service closed permanently on 31 March 2026. Here's your complete action plan — deadlines, penalties, and the most affordable alternative at £59.
Comparing the best CT600 corporation tax software for UK limited companies in 2026. Pricing, features, and which one is right for your business.