Dormant and micro-entity accounts to Companies House, then your CT600 to HMRC. FileMyLtd fills in what it can from the register, checks every figure in plain English, and you approve and submit.
- Checked against Companies House rules
- Deadline reminders
- You submit, always
What you can file
Every UK limited company files accounts with Companies House, including dormant ones. Most trading companies also file a Company Tax Return (CT600) with HMRC. FileMyLtd does both, in the order they're due.
Dormant company accounts
For a company that hasn't traded. Last year's figures come from your previous accounts, so most dormant filings are a review and a click.
Micro-entity accounts
For small trading companies under £1m turnover and £500k on the balance sheet. A short balance sheet, the right statements, in the iXBRL format Companies House needs.
CT600 Company Tax Return
Corporation tax worked out from your accounts, including marginal relief, and filed with your iXBRL accounts attached, the way HMRC expects.
WebFiling is closing for accounts
From 1 April 2028, accounts can only be filed with software.
Companies House's web and paper routes close for all accounts, including dormant ones, with no transition period. What changes and what to do
How it works
- 01
Find your company
Type your company number. Name, directors and deadlines come straight from the Companies House register.
- 02
Start from last year
Last year's figures and shares are read from your previous accepted accounts, with a note saying where each one came from.
- 03
Check in plain English
The balance sheet must balance, the period must be valid and the dates must match the register. Every problem is explained, not coded.
- 04
You approve and submit
You read the final accounts, make the director's declaration and press submit. Nothing is ever sent without you.
Before anything is sent
A rejected filing after the deadline still earns a penalty. So FileMyLtd runs its checks before you approve, not after Companies House says no.
The numbers add up
Assets less liabilities equal capital and reserves, comparatives are present, and totals are recomputed rather than trusted.
The dates are right
The period ends on your accounting reference date and is no longer than 18 months, and the dates match what Companies House holds.
It matches the register
Company name, number and the signing director are taken from the Companies House register, so they can't be mistyped.
The file is valid iXBRL
Accounts are validated with Arelle, the open-source XBRL processor, against the current FRC taxonomy before you see the final version.
Your deadlines
Pick the date your accounting year ends to see when everything is due. FileMyLtd reads the real dates from Companies House and reminds you 60, 30, 14, 7 and 1 days before each.
-
Period end
Accounting year ends
31 March 2026 -
+ 9 months
Accounts due at Companies House
31 December 2026Late filing starts at £150 and doubles if you're late two years running.
-
+ 9 months and 1 day
Corporation tax payment due
1 January 2027For profits up to £1.5 million. HMRC charges interest on late payment.
-
+ 12 months
CT600 due at HMRC
31 March 2027If HMRC has sent a notice to deliver. Late filing now starts at £200.
Built to be trusted
Your HMRC login isn't stored
Your HMRC online login is used for the one submission it's needed for, then discarded. It never sits in a database.
Two-factor sign-in
An authenticator app is required before anyone can approve or submit, and sensitive actions ask you to confirm again.
Encrypted where it matters
Your company UTR is encrypted before it is saved and shown only as its last two digits after that.
Data held in Europe
Accounts data and documents are stored in EU-jurisdiction storage, processed close to London.
You see everything first
The accounts you approve are exactly the accounts that are sent. There's no hidden step and no auto-submit.
A UK company behind it
Made by Cyber Spark IT Services Ltd, company 14891489, registered in England and Wales.
"The software should do the fiddly parts and explain the rest. The director should always be the one who presses submit."
Sameer Mushtaq, founder
Pricing
Early-joiner launch offer: 50% off
Yearly prices, no add-ons. Early joiners pay half.
Dormant
For a company that hasn't traded.
- Dormant accounts to Companies House, in iXBRL
- Last year's figures filled in from your previous accounts
- Checked against Companies House rules before you approve
- Deadline reminders at 60, 30, 14, 7 and 1 days
Micro-entity
Accounts and the CT600 for a small trading company.
- Micro-entity accounts to Companies House
- CT600 Company Tax Return to HMRC, with the accounts in iXBRL
- Corporation tax worked out, including marginal relief
- Deadline reminders for accounts, CT600 and payment
- Plain-English checks before anything is sent
Planned prices · Full pricing and what's included
FAQ
Can I file my company accounts myself, without an accountant?
Yes. Companies House guidance has a "file your own accounts" route for directors, and many dormant and micro-entity companies file without an accountant. You stay legally responsible for the accounts either way, so FileMyLtd explains each figure and checks it before anything is sent.
When does Companies House WebFiling stop taking accounts?
From 1 April 2028 all accounts, including dormant and revised accounts, must be filed with commercial software in iXBRL. There is no transition period. WebFiling stays open for other filings such as confirmation statements and director changes.
What do I need to file through FileMyLtd?
Your company number, the 6-character company authentication code, and a Companies House presenter ID and code for software filing. For the CT600 you also need the company's 10-digit UTR and your HMRC online login, which is used for that one submission and never stored.
Is FileMyLtd part of Companies House or HMRC?
No. FileMyLtd is independent software made by Cyber Spark IT Services Ltd, a UK company. It sends filings through the official Companies House and HMRC software filing services, which it is being tested against now.
How much will it cost?
Prices are £10 a year for a dormant company and £29 a year for micro-entity accounts with the CT600. Early joiners get 50% off: £5 and £14.50 a year. Nothing is charged without your say-so.
Create an account, add your company from the Companies House register and see your deadlines in a couple of minutes. FileMyLtd is in early access. Accounts and tax returns are being tested with Companies House and HMRC; live filing opens to early-access members first.