Independent filing service. Not a government website. Not affiliated with HMRC or Companies House.

Prepare micro-entity accounts and a CT600 in one place

Filing software for an existing UK company. Check the deadlines, enter the figures, and submit accounts to Companies House and a Company Tax Return to HMRC.

Start free. Pay only when you submit.

Find my company

£39 for a trading micro-entity · £10 for a dormant company · No subscription

Your filings are submitted to HMRC and Companies House.

What this software does

For a UK company that is already on the register. You prepare the filing here, then it is sent to Companies House and HMRC.

One guided flow for the accounts and the CT600 for the same period
Deadlines shown before you create an account. Accounts, the tax payment and the CT600 fall on different dates
Figures are entered in whole pounds, and the computation uses the HMRC taxonomy that covers that period end
The account shows whether each filing was accepted or rejected, and the receipts can be downloaded

HMRC’s free Company Tax Return service closed on 31 March 2026, so a CT600 is now filed through software. How to file a CT600 online

Guides

How it works

Find your company and check its deadlines
Prepare your accounts and Corporation Tax return
Review, pay once and submit to both authorities

Pricing

£39 — trading micro-entity: accounts to Companies House and a Company Tax Return to HMRC
£10 — file dormant accounts with Companies House (nil Company Tax Return available when HMRC has issued a notice to file)
No monthly subscription — pay only when you submit

What you submit

Micro-entity accounts to Companies House
Company Tax Return to HMRC, with tax computation and supporting documents
Submission status and acceptance receipts

Registering or incorporating a new company is not offered. CT Submit does not provide tax advice.

Free deadline checker · Guides · View pricing · Terms and Conditions · Privacy Policy