How DormantFile works
From sign-up to filed — the whole process takes under five minutes. Three phases, two filings, zero accounting knowledge.
Set up
30 sec
Reminders
Auto
Filing
~2 min
Get set up
~2 minutesCreate an account, add your company, and pick a plan. That's it.
Create your account
Sign up with your email address and set a password. Takes about 30 seconds.
Add your company
Enter your company number — we pull the name, incorporation date, and filing history from Companies House automatically. Then add your UTR and accounting period dates.
Choose your plan
Basic is £19/year for one company. Multiple is £39/year for up to 10. Agent is £49/year for up to 100.
We watch your deadlines
AutomaticWe calculate your filing deadlines automatically — nine months after your accounting reference date for accounts, twelve months for CT600. You get email reminders so you never miss a deadline.
Reminders sent at
Filing deadline in 30 days
from DormantFile
Your annual accounts for ACME HOLDINGS LTD are due on 28 April 2026.
Log in to your dashboard to file now →
CT600 return due in 7 days
File and confirm
~2 minutesConfirm your details and submit. Both filings go directly to the government via official APIs.
File your accounts
Submit your dormant accounts to Companies House. Enter your authentication code and we generate the iXBRL document and submit via the Companies House software filing API.
File your CT600
Submit a nil CT600 to HMRC. Enter your Government Gateway credentials — they’re used once at submission and immediately discarded. We file directly via HMRC’s GovTalk API.
Get confirmation
Once your filing is accepted, we show confirmation in your dashboard and send you an email. Filing records are stored so you always have a history.
See it in action
A walkthrough of the actual DormantFile dashboard.
EXAMPLE HOLDINGS LTD
Company number: 12345678
10 Example Street, London, EC1A 1BB
ActiveYour credentials stay yours
We never store your HMRC or Companies House login details. Here's exactly how it works.
Government Gateway
Your credentials are used once at submission and immediately discarded. Never stored, never logged.
Authentication code
Your Companies House auth code is used in-session to sign the submission. It's never persisted.
Behind on your filings?
DormantFile shows all outstanding periods for your company. File them one at a time, starting from the oldest, and your company will be brought up to date.
Not registered for Corporation Tax?
No problem. Accounts and CT600 are independent filings — you can file one without the other. Many dormant companies only need to file annual accounts. Read our guide →
Ready to get started?
Set up your company in minutes. When it's time to file, both returns go directly to Companies House and HMRC. From £19 a year.