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The UK market blends permanent roles, umbrella engagements, and outside-IR35 contracts. Each wrapper changes tax handling. This article frames the employee path vs a straightforward sole trader setup you can compare in our calculator.
Two NI universes
Employees and employers pay Class 1 within thresholds; sole traders face Class 2 flat and Class 4 profit
slices. Marginal percentages differ, so do not map £1 of salary to £1 of profit without rerunning the bands.
Pensions and auto-enrolment
Employers must enrol you and contribute at minimums; freelancers must voluntarily fund pots. Missing those
contributions shows up decades later as much as in the current account.
Demand risk and bench time
Contractors frequently earn more per day yet bill fewer days. Annualize cautiously: multiply day rate by
realistic billable weeks, not by fifty-two.
FAQ
Does IR35 make freelance pointless?
It changes net economics and risk; some still prefer controlled PAYE equivalents inside arrangements.
What about limited-company dividends?
Tax on dividends plus optimal salary splits differs from sole trader profit—model separately with an accountant.