Expert insights
for UK directors

Your Government Gateway password and Companies House authentication code are encrypted with AES-256-CBC and are readable only by you — not by our administrators, not by our support team, not by API callers. Here is exactly what we encrypt, what we deliberately never store, how a submission stays provable without keeping secrets, and what encryption does not protect you from.

A complete 2026 guide to capital allowances for UK limited companies: the £1m AIA, full expensing, the new 40% first-year allowance, the 18% to 14% writing down allowance change, and exactly which CT600 box each figure belongs in.

Error 3001 is not an error. An IRmark receipt is not proof your return was logged. A practical field guide to the HMRC and Companies House rejection codes that show up in real CT600 filings — 1046, 3304, 1608, 1610, 1611, 1612, 9043, 4084, 9999, 3081 — what each one really means, and exactly how to fix it.

Charities and Community Amateur Sports Clubs still have to file a corporation tax return — CT600E is how the exemption is claimed. Here is how WeFile supports every box from E5 to E200, why charity accounts must be filed with Companies House separately, and what happens on a long period of account.

Supplementary page CT600A is now fully supported in WeFile. Here is everything you need to know about the section 455 charge on directors' and shareholders' loans — how it works, the rate schedule up to 35.75%, how relief and deferred relief are handled, and how to file it start to finish.

Companies House late filing penalties are automatic and start at £150 — rising to £1,500, or double for a second consecutive late year. Here are the exact amounts, how the deadline is measured, when an appeal can succeed, and what happens if you do not pay.

We're excited to announce that our MTD-compliant VAT return filing service is officially live. Connect to HMRC, view your obligations, and submit your VAT returns — all completely free of charge for every WeFile user.

A comprehensive guide to Companies House approved software suppliers, what it means to be listed on the official GOV.UK register, and how WeFile helps businesses file their accounts electronically with ease.

Use WeFile as your company formation agent for Companies House submission, document retrieval, ID verification and optional registered address services.