UK Corporation Tax and the CT600

If you formed a UK private limited company (Ltd) with Companies House, its annual profit is reported to HMRC on a Corporation Tax return — the form known as the CT600. FormBridge's Tax autopilot assembles that return from your books, and a licensed partner reviews it before it's filed.

What the CT600 is

The CT600 is the return a UK company files with HMRC to report its taxable profit and the Corporation Tax due on it. It's a distinct obligation from the Confirmation Statement you file with Companies House — that one confirms who owns and runs the company, and is tracked by the Compliance autopilot, not the Tax autopilot.

How FormBridge assembles it

• Reads your closed books. Revenue, costs, and balances come from your categorized ledger, the same source used for your P&L and balance sheet.
• Maps figures to the CT600. The agent places your numbers onto the return and prepares the supporting computations that accompany it.
• Flags open questions. Anything ambiguous — a cost that may not be allowable, a period that looks off — is surfaced for the human reviewer rather than guessed.
• Routes to a licensed accountant. A qualified partner reviews the return, resolves anything flagged, and handles the filing to HMRC.

See how the assembly step fits the wider flow in how tax filing works, or compare the US forms in US tax forms explained.