uk.co.0sand1s/cis

up checked 2026-11-11T01:38:52.805Z

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Publisher-provided title

0s and 1s CIS calculators

Publisher-provided description

Free UK CIS calculators: deductions, deadlines, late penalties, gross payment test, verification.

Summary by lookupd

Calculates UK construction industry scheme deductions, gross-up amounts, tax months, filing deadlines, late penalties and verification or…

Install

Claude Code, remote (streamable-http)

claude mcp add --transport http cis https://0sand1s.co.uk/mcp

Codex, remote (streamable-http)

codex mcp add cis --url https://0sand1s.co.uk/mcp

Cursor, remote (streamable-http) → .cursor/mcp.json

{
  "mcpServers": {
    "cis": {
      "url": "https://0sand1s.co.uk/mcp"
    }
  }
}

Other clients: docs. Or tell your agent: Set up lookupd for me: read https://lookupd.com/agent.md and follow it.

Publisher-provided text

cis_deduction Works out the CIS deduction on a payment to a subcontractor, from the gross bill to the net payment. Takes the gross including VAT, the VAT, the subcontractor's
cis_gross_up Finds the gross amount (excluding VAT) that leaves a given net payment after the CIS deduction, for a subcontractor quoted a take-home figure. Takes the net, th
cis_tax_month For a date, gives the CIS tax month it falls in (the 6th to the 5th), the tax year, the date the monthly return (CIS300) is due (the 19th, also the date for pay
cis_late_penalties Works out the late filing penalties on one monthly CIS return under Finance Act 2009 Schedule 55: £100 the day after the 19th, £200 at 2 months, then the greate
cis_gross_payment_turnover_test Checks the turnover test for CIS gross payment status (Finance Act 2004 Schedule 11, SI 2005/2045 reg 28): £30,000 net construction turnover for a sole trader;
cis_needs_verification Says whether a contractor must verify a subcontractor with HMRC before paying them (SI 2005/2045 reg 6): not needed if the subcontractor was on one of this cont
cis_nil_return_check Says whether a contractor must file a CIS nil return for a tax month (SI 2005/2045 reg 4(9A) and (9B), inserted by SI 2026/289 from 6 April 2026): due when a ma

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