If you operate a limited company, there’s an important deadline coming up. On 31 March 2026, the government will shut down its free joint filing service for both HMRC and Companies House submissions. After this date, you’ll need to use commercial filing software to file annual accounts and Company Tax Returns (CT600).
What’s Changing?
Currently, the government offers a free online platform where limited companies can file both their annual accounts to Companies House and company tax returns to HMRC in one go. However, from April 2026 onwards, that combined service will no longer exist. Filing will need to be done separately using approved commercial software, or, in some cases, through a separate Companies House web service or by post.
Why Is the Free Service Being Withdrawn?
The joint filing tool was first introduced in 2011 and has served businesses well, but it no longer meets updated standards. Changes introduced under the Economic Crime and Corporate Transparency Act require improved data quality, traceability, and digital compliance. Discontinuing the free service aligns with efforts to bolster transparency, prevent financial crime, and improve the accuracy of filings across the board.
What You’ll Need to Do
From 1 April 2026, every limited company must:
- Use approved commercial software to file Company Tax Returns (CT600) with HMRC,
- Submit annual accounts either via commercial software, the separate Companies House online service, or the traditional paper method (which may also be phased out later).
If you’ve used HMRC’s joint filing service in the past, make sure you download and back up all previously submitted returns, ideally going back three years. Once the system closes, your past submissions will no longer be accessible.
Why Planning Early Matters
Although 2026 feels like it’s still a way off, switching your filing method takes time and planning. You don’t need to wait, commercial software is already approved and available now. Starting early gives you space to choose a provider, practice using the system, and migrate your records.
Key Takeaways
- The free HMRC/Companies House joint filing platform is being withdrawn on 31 March 2026.
- Limited companies will need to use commercial software to file both tax returns and annual accounts.
- Ensure you back up previous HMRC submissions before the system shuts down.
- Early preparation reduces stress and ensures compliance well ahead of the deadline.
Need Support With the Transition?
We know it may seem like a hassle, but you don’t have to handle it alone. At Greystone Advisory, we support limited companies across the Midlands with tax and compliance. Whether it’s recommending software, managing filings on your behalf, or providing clear, jargon-free guidance, we’re here to help.
Want to get ahead of the game? Contact us today to discuss your next steps and ensure your business stays compliant without the last-minute scramble.
