How online accounting actually works for your limited company
“Luke is an extremely professional and approachable guy. His knowledge in the field of accounting is second to none.”
How online accounting works for limited companies is one of those questions that sounds simple but opens up into a lot of moving parts. If you’ve recently incorporated or you’re trying to figure out whether your current setup is actually keeping you compliant, here’s a clear picture of what’s involved.
What online accounting actually means for a limited company
Online accounting just means managing your company’s finances through cloud-based software rather than spreadsheets or desktop programmes. Think QuickBooks, FreeAgent, Xero, or Sage. The software connects to your bank, keeps your records up to date, and makes it much easier to stay on top of VAT, payroll, and filing deadlines throughout the year.
For limited companies specifically, the accounting obligations go further than they do for sole traders. You need to file annual accounts with Companies House, submit a Company Tax Return (CT600) to HMRC, handle corporation tax, and stay on top of confirmation statements. Online accounting software helps you keep the records that make all of that possible. Without organised records, hitting those deadlines becomes genuinely stressful.
HMRC’s joint online filing service for company accounts and Company Tax Returns closed on 31 March 2026. From 1 April 2026, you must use third-party software to file your Company Tax Return with HMRC. If you’re still relying on the old HMRC portal, it’s worth getting this sorted now.
What changed in 2026 and why it matters for your company
The HMRC and Companies House joint filing service has now closed. According to GOV.UK guidance on the service closure, this happened because the old system was outdated and didn’t align with modern digital standards or the requirements introduced by the Economic Crime and Corporate Transparency Act. It’s not optional to catch up with this. If you’re filing a Company Tax Return after April 2026, you need compliant software to do it.
The same guidance also recommends that company directors download and save at least three years of previous accounts filings before the old portal disappears entirely. If you haven’t done that yet, it’s worth checking. Future filing of accounts with Companies House will also eventually move to software-only, though HMRC has confirmed at least 21 months’ notice will be given before that change comes in.
Making Tax Digital and what it means if you’re VAT-registered
If your limited company is registered for VAT, you’re already inside Making Tax Digital. All VAT-registered limited companies must comply with Making Tax Digital for VAT, which means keeping digital records and submitting VAT returns through MTD-compatible software. You can’t just log into HMRC’s website and type the numbers in anymore. The records have to flow digitally from your accounting software to HMRC.
This is one of the reasons that using proper accounting software isn’t really optional for a limited company. It isn’t just about convenience. It’s about being able to meet your legal obligations. Accounting software is the most sought-after technology among UK SMEs according to government research on SME technology adoption, and a big part of that is compliance rather than preference.
What to look for in an online accountant for your limited company
The main thing I’d say here is: make sure you know exactly who is handling your accounts. There are online accounting services that charge a monthly fee and then go almost completely quiet. One thread on UK Business Forums described a director who paid monthly for over a year and received no contact and no filed accounts. That’s not an edge case. It happens more than people realise.
For a limited company, you want an accountant who handles your corporation tax, annual accounts, CT600, Companies House filings, and can deal with VAT and payroll if you need those too. You also want someone who explains things in plain English when you have a question, not someone who sends you a technical reply you have to Google. Fixed fees help too. You don’t want a surprise invoice every time you send an email.
Running a limited company comes with real obligations, and it’s normal to feel uncertain about whether you’ve got everything covered. If you want to talk through your situation before committing to anything, just book a free call and I’ll give you an honest picture of where things stand.
Ready to go further?
Whether you want to set things up yourself or hand it over entirely, here are two good next steps depending on where you are right now.
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AAT qualified accountant based in Uttoxeter. Personal, one-to-one accounting for small businesses and sole traders across the UK.