UK company lookup, filing deadlines, late penalties and Corporation Tax maths. No account.
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First seen 12 Oct 2026. One server, whatever directories list it: each directory listing keeps its own page and history.
1
Directories
Collected by InvokeRank
7
Tools
From an anonymous probe
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Tools
| Tool | Description | Behaviour |
|---|---|---|
| check_ct600_eligibility | Check whether a company fits this tool (micro-entity limits, single UK trade, no groups/R&D/gains/property). An overdrawn director loan is supported: the return carries a CT600A. Money in POUNDS. | Read-only |
| compute_ct600 | Compute the corporation tax position from figures (stateless, nothing stored): tax due, taxable profit, marginal relief, losses, CT600 box values. | Read-only |
| ct600_filing_guide | READ THIS FIRST. How to prepare a CT600 with this server: which companies qualify, the order to gather figures in, what the words mean (micro-entity, filleted accounts, the declaration), and which cases to refer to an accountant instead. Takes no arguments. | Read-only |
| estimate_uk_self_assessment | Estimate one person's UK Self Assessment for one tax year (2025-26 or 2026-27): income tax on salary, dividends, self-employment and interest, Class 4, student loans, payments on account, and Class 1 National Insurance on a salary from the person's own company. Uses the same engine as A.X.E.L Filing's returns, which matches HMRC's own test cases. An estimate only: nothing is saved or filed. Never ask for a UTR or National Insurance number. | Read-only |
| lookup_uk_company | Look up a UK company at Companies House by company number: name, status, registered office, next accounts period, and a quick fit check. | Read-only |
| uk_company_late_filing_penalties | Late filing penalties for a UK company's accounts (Companies House) and CT600 (HMRC): what is owed if filed on a given date, and the full schedule of dates when each penalty applies. Use with lookup_uk_company, which gives the accounts deadline. Dates are ISO (YYYY-MM-DD); filedOn defaults to today. | Read-only |
| uk_director_tax_year | The director's whole year in one view: the company's corporation tax AND the director's own Self Assessment, side by side. Give either filingId (a saved CT600 draft, signed in) or the company's figures, plus the director's salary per tax year and each dividend with the date it was PAID (dividends are taxed in the tax year paid, which may differ from the company's year). Returns the company's profit, tax and profit after tax, each personal tax year's Self Assessment, Class 1 National Insurance on the salary (employee and employer, paid through payroll, with the Employment Allowance where it applies), payments on account, every due date, and the combined total. For what-ifs, call once per scenario and compare them side by side; when a scenario changes the salary, pass figures with staffCosts adjusted (salary plus employer NI) so corporation tax reflects it (see the guide). With MORE THAN ONE company, ask about every company they draw from and pass `companies` (or, signed in, `useProfile: true` to start from their saved answers): the Self Assessment covers all of it once, associated companies share the corporation tax limits, connected companies share one Employment Allowance, and NI can add the pay together. The user decides; present options, not a recommendation. Never ask for a UTR or National Insurance number. | Read-only |
| Directory | Listing | Tier | First seen |
|---|---|---|---|
| Official MCP Registry | A.X.E.L Filing (public tools) | - | 12 Oct 2026 |