Locum dentists: how your tax actually works

Most locum dentists are self-employed across several practices — which means one self assessment return, but income and paperwork arriving from many directions. The principles are the same as for any associate; the failure mode is different: records scattered across sites and engagements until nobody can reconstruct the year.

The locum specifics

• One business, many engagements. Keep a single running record of every practice, period worked, gross paid and deductions taken — per pay statement, filed as you go.
• Travel is more claimable — sometimes. Genuinely itinerant work to temporary engagements can support travel claims that a fixed associate could never make; a long-running regular slot at one practice starts to look like a normal workplace again. The pattern decides, so log everything.
• Watch employment status. Short engagements controlled tightly by the practice can drift toward employment in substance. Understand each engagement's terms — status surprises cut both ways.
• Pension needs deliberate attention. Whether and how NHS locum dental work is pensionable depends on the engagement's arrangements — don't assume it's handled. If the NHS pension matters to you, make it an explicit question on every booking, and reconcile whatever's deducted.
• Income smoothing is on you. Gaps between bookings are normal; the set-aside discipline (30% for tax, plus a buffer for quiet months) is what makes locum life sustainable.

Run properly — one clean record system, quarterly check-ins, expenses logged with the travel pattern documented — a locum's tax is no harder than anyone else's. Run from a shoebox across nine practices, it's misery. We onboard locums onto exactly that system as standard.