Umbrella vs limited company: which keeps more of your money?
Two contractors on the same day rate can take home very different amounts. Here's how umbrella and limited-company pay actually differ, and when each one makes sense.
In short: IR35 is the rule that decides whether a contractor is genuinely self-employed or effectively an employee for tax. Inside IR35, you're taxed much like an employee and the limited-company dividend advantage disappears. Outside IR35, you can be paid more tax-efficiently. For medium and large clients, the client decides your status.
IR35 has a reputation for being impenetrable, and the official name — “off-payroll working rules” — doesn’t help. But the idea underneath it is genuinely simple, and worth understanding because it directly affects how much of your day rate you keep.
The question IR35 is really asking
Strip away the jargon and IR35 asks one thing: if it weren’t for your limited company sitting in the middle, would you look like an employee of this client? If the honest answer is yes, the rules say you should be taxed roughly like one. If you’re genuinely running a business — multiple clients, your own equipment, real commercial risk — then you’re outside IR35 and taxed as a business.
It’s about the reality of the working relationship, not your job title or the fact you have a company.
Inside vs outside, and why it matters to your pay
Outside IR35, you can pay yourself the tax-efficient way: a modest salary plus dividends, with the dividend portion avoiding National Insurance. Inside IR35, that route is effectively closed — you’re taxed much like an employee, and a limited company gives you little advantage over an umbrella. This is exactly why the umbrella vs limited company comparison hinges on your status, and why the calculator asks whether you’re inside IR35.
What status actually turns on
Three factors do most of the heavy lifting:
- Control — does the client direct how, when and where you work, like a boss would?
- Substitution — could you genuinely send a qualified substitute in your place, or must it be you personally?
- Mutuality of obligation — is the client obliged to offer work and are you obliged to take it, like an employment relationship?
The more your arrangement looks like employment on these, the more likely it’s inside IR35.
Who decides
This changed in recent years and trips people up. For contracts with medium and large clients (and across the public sector), the client assesses your status and issues a determination — it’s not your call. Only with small clients does the responsibility generally remain with your own company. Either way, it’s worth understanding the factors so you can have an informed conversation rather than just accepting a blanket assessment.
General information, not tax or legal advice. IR35 is fact-specific and the consequences of getting it wrong can be significant — take professional advice and see HMRC’s guidance.