Can you run multiple businesses under one limited company?
You can absolutely run more than one trading activity through a single limited company. There’s no legal rule against a company having a consulting arm and an ecommerce shop and a rental property, all under one roof.
Why people do this
It’s simpler. One set of annual accounts, one Corporation Tax return, one bank account to reconcile, rather than running separate legal entities for every idea you have. If the ventures are small, low risk, and closely related, this is often the pragmatic choice, and it’s genuinely cheaper in accountancy fees than running multiple companies.
Why people sometimes shouldn’t
Here’s the catch. Because it’s all one legal entity, a problem in one part of the business, a lawsuit, a big debt, a failed venture, can affect the whole company, including the parts that were doing fine. If you’re running a low risk side project alongside something genuinely risky, like a venture involving significant debt or liability exposure, bundling them together means the risky one can drag the safe one down with it.
When separate companies make more sense
If the ventures are meaningfully different in risk profile, if you might want to sell one of them independently one day, or if you want different people holding shares in each, separate companies (sometimes under a holding company structure) usually make more sense despite the extra cost and admin.
The practical middle ground
Plenty of small business owners run related, low risk activities under one company and only split things out once a venture grows large enough, or risky enough, to justify its own legal shell. There’s no rush to overcomplicate this before you need to.