Free tools
UK accounts, penalties & CT600 tools
Practical calculators and checklists that turn search intent into actionable next steps.
Late Filing Penalty Estimator
Estimate Companies House late filing penalties (private companies) + next steps.
Accounts Filing Options Chooser (Abridged vs Micro vs Filleted)
Quick path: micro-entity check + abridged/filleted guidance (for small companies).
Dormant Checker (CH vs HMRC)
Quick triage: dormant vs micro-entity path (includes the bank fees trap).
Micro-Entity Eligibility Check
2-out-of-3 thresholds + common exclusions.
CT600 Inputs Checklist Builder
Generate a practical checklist of what you need for CT600.
Appeal Evidence Builder (AI + Manual)
Draft an evidence checklist and explanation paragraph for penalty appeals.
Penalty Appeal Letter Generator
Generate a copy-paste appeal letter (template tool).