What it means
A clinic may need cover during leave, illness or a hiring gap, and a locum can maintain service while the permanent post is unavailable. Temporary status does not lower the required professional standard.
NHS England has guidance for organisations engaging locum doctors and the UK General Medical Council explains employer checks and indemnity for doctors, but these are UK-specific sources and other professions and jurisdictions have different rules. The term is used beyond medicine for pharmacists, vets and other professional substitutes, and some places use "locum tenens" or different titles, so always state the profession and job duties.
A fictional medical practice books a doctor for two weeks and verifies registration, scope, references and cover under the relevant local requirements, while a fictional pharmacy needing weekend cover confirms that the locum pharmacist may perform the assigned services. A general resume is not a substitute for current credentials.
A locum may be paid hourly, per session or under another contract, and agency fees, travel, taxes and indemnity can change total cost. A fictional hospital quoted $80 per hour for temporary cover is charged a separate agency fee under the contract, so finance budgets both before approving the shift.
Compared with permanent staff, locums provide flexibility but can cost more per hour in some markets, and the comparison depends on benefits, recruitment, workload and duration, so a blanket "always more expensive" claim is unsupported. A fictional rural practice comparing temporary cover for three months with hiring includes recruitment delay and continuity, not just hourly pay, and the best choice may change after the vacancy is filled.
Onboarding matters even for a short placement, because access to records, escalation routes, equipment and local protocols can affect safety. A fictional vet joining a new clinic for one week is shown the medicine storage system and emergency referral protocol, details that a licence alone cannot reveal.
Clinical responsibility remains with the professional for their work, while the organisation also has duties, and the exact allocation depends on law and contract. Clarify who supervises, reports incidents and handles complaints; when a patient raises a concern about treatment during a locum shift, the practice keeps the record and follows its complaint process rather than treating the temporary worker as making it someone else's problem.
Continuity of care is a risk when professionals rotate frequently, so good notes and handoffs matter, and a doctor who orders a test near the end of a placement needs a named clinician assigned to review the result. Check indemnity and insurance for the work performed, since the GMC notes that UK doctors must have appropriate cover and details vary by employment arrangement and jurisdiction; a fictional specialist accepting weekend work outside the usual scope of an existing policy confirms coverage before the shift.
Scheduling rules matter because long or repeated shifts can create fatigue, and a fictional service that has covered the same rota gap with locums for a year should review staffing and demand, since temporary cover should not conceal a structural shortage. Record assignment dates, qualifications, agreed rates and handoffs, and remove access when the placement ends, because data security is part of ending the engagement well.
In practice
Real-world examples.
Example
A doctor covers a colleague's annual leave at a clinic. The clinic checks registration and indemnity before the first shift and agrees the rate in writing. A named permanent clinician supervises and takes over any follow-up when the leave ends.
Example
A pharmacist fills a weekend rota gap after credentials are checked. The pharmacy confirms that the pharmacist may perform the services on the rota and gives access only to the systems needed. Access is closed on Monday morning.
Example
A practice assigns follow-up for tests ordered near a locum's last day. It names a clinician to review each result and tells patients who to call. Nobody is left waiting for a person whose contract has ended.
Formula
Calculation
Illustrative total locum cost = agreed hours x hourly rate + applicable agency, travel, tax and cover costs. Contract terms decide actual amounts.
A fictional hospital books a locum for 10 shifts of 8 hours at $80 per hour. The pay is 10 x 8 x $80 = $6,400. An agency fee of 15% adds $6,400 x 15% = $960, and travel adds $400, so the total is $6,400 + $960 + $400 = $7,760. Across 80 hours, that is $7,760 / 80 = $97 per hour, which is $17 above the quoted rate.Case study
Seen in the real world.
In this fictional case, Ridge Clinic hires a locum doctor for 10 shifts while a permanent clinician is on leave. It verifies credentials and cover, grants limited system access and provides a handoff. A pending test result is assigned to an ongoing clinician. Finance separately records the agreed rate and agency charge.
The locum is paid for 80 hours at an agreed $80 per hour, a pay bill of $6,400, with a separate agency charge of $960 and travel of $400, so the full cost is $7,760. Finance reports $97 per hour as the true cost of cover and not the quoted rate. The invented figures show why the budget needs the whole bill and not only the hourly rate.
Watch out
Common mistakes.
- Assuming temporary staff need no local onboarding.
- Treating the quoted hourly rate as the entire cost.
- Leaving pending patient or client work without a handoff.
Questions
People also ask.
Are locums only doctors?
No. The term is also used for pharmacists, vets and other roles.
Does a locum need professional registration?
Where the role requires it, current registration and scope must be checked.
What should an organisation plan for?
Credentials, contract, onboarding, indemnity and continuity.
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