Locum GP chambers: how they work and what they cost

GP chambers sit between full self-employment and agency locum work. You keep your self-employed status and invoice your own hours, but the chambers handles the business admin, sometimes negotiates rates with practices on your behalf, and pools marketing, indemnity discounts, and peer support. In return they take a fixed monthly fee or a percentage of earnings.

The three chambers models

Most UK chambers fall into one of three shapes.

Flat monthly fee. Typical range £100–£300 per month. You get booking admin, invoice-sending, a branded email, and peer events. You still set your own rate and bill the practice directly. Good if you work a lot and want predictable cost.

Percentage of gross. Typical 5–12%. The chambers handles rate negotiation, chase, and often pension paperwork. Lower risk if work is patchy but expensive if you have a good year.

Hybrid with shared booking platform. Smaller monthly fee plus a lower percentage. You see all the available sessions in one place and the chambers handles contracting.

What you actually get

Not every chambers offers all of these. Check before joining.

• A booking platform or shared diary with practices in your area
• Contract template and invoice template done once, reused
• NHS Pension Form A and B submission (valuable, the Form B deadline is the 10th of the month after the work)
• Group indemnity discount (normally via MDU, MPS, or MDDUS)
• CPD events, peer-group meetings, practical session reviews
• Someone to chase a late invoice without you having to

Chambers vs agency vs direct

Direct with the practice is almost always the best-paid option. No one takes a cut. The work is on you to find.

An agency takes 10–20%. It is the easiest route when starting, with the least financial margin.

Chambers fees normally sit between the two. The justification is that the chambers is working for you, not selling you, and the peer network is real.

The right structure depends on how much you work and how much you value admin off your plate. A full-time locum GP on £120,000 gross pays £12,000 a year to an agency at 10%. The same GP pays £3,600 a year for an average chambers. If the chambers saves you ten hours a month of admin that is time you can either convert into more clinical work or keep as your life.

Who chambers suit

Mid-to-full-time locum GPs with a regular pattern of sessions who do not want to run an admin business alongside medicine. They are less valuable if you only locum occasionally, the monthly fees can erode a small income fast.

Practical due diligence before joining

Ask: who owns the chambers, are the directors working clinicians, what is the notice period, who chases my invoices, what is the turnaround on payment, and what happens to my personal data and booking relationships if I leave.

Read the contract. Anything that limits your ability to work directly with practices after leaving is a red flag, a chambers should earn its fee, not tie you in.

Sessional works with chambers models as well as direct and agency, the same tools apply. See our locum GP page for the full set of features, or try the take-home tax calculator to work out whether a chambers fee is justified in your personal numbers.