How much does knee replacement cost privately in the UK? (2026)

A private total knee replacement resurfaces the worn ends of the thigh bone and shin bone with metal and plastic parts, and is used when arthritis causes pain and loss of function that other treatments no longer control.

We looked at the self-pay price lists several hospital groups make public. For knee replacement, the figures ran from £14,938 to £21,411, and the table gives each one with the hospital and the exact item named in its list.

A guide price can move after assessment, for example if your consultant recommends a different variant. Always ask for the final figure in writing before agreeing.

After anaesthesia the surgeon removes the damaged surfaces and fits metal and plastic components, sometimes with bone cement, and may tailor the cuts using a robotic system. You are encouraged to bend and straighten the knee within hours of surgery.

Physiotherapy is a long part of the pathway. Ask how many sessions are included, who delivers them and what happens if your range of movement is slow to return.

Several things move the cost of knee replacement up or down. These are the ones worth asking about first.

• Total versus partial replacement: a unicompartmental replacement is listed below a total knee at several hospitals, for example £15,550 against £16,940 at Nuffield Health Bristol.

• Implant and approach: standard, personalised or robotic-assisted implants differ, and Ramsay Park Hill lists a personalised (Conformis) knee at £21,411 against £16,301 for the standard knee.

• Hospital stay length and rehabilitation needs: knees often need more physiotherapy than hips, and slow progress can extend the stay.

• Consultant and anaesthetist fees, which Spire says are set independently of the hospital.

• Location: the guide prices we retrieved span £14,938 to £19,078 for a standard total knee.

Quotes rarely list everything, so it helps to know what to look for. The table sets out typical inclusions and extras for this procedure.

Insurers usually cover knee replacement for arthritis once conservative treatment has been tried, with some applying fee limits that can leave a gap. Self-pay patients may be offered a fixed price with finance.

If you are using insurance, get pre-authorisation in writing before treatment and ask which fees your policy limits could leave uncovered. If you are paying yourself, some hospital groups offer medical finance subject to status; check the rate, term and total repayable before agreeing.

NHS knee replacement follows assessment and trial of non-surgical treatment, and is subject to the 18-week referral-to-treatment standard, though local orthopaedic waits can be longer. Surgery is free at the point of use.

In England the NHS aims to start non-urgent consultant-led treatment within 18 weeks of referral, and patients can ask to be offered alternative providers if that is likely to be exceeded. Actual waits vary by trust and specialty.

Most people walk with aids soon after surgery and drive again after several weeks, and return to desk work in roughly one to three months depending on the job. Physiotherapy over several months matters, and its cost should be in your plan.

Few people need more than the planned care, but the cost position if they do is worth settling before treatment.

• Stiffness, infection, blood clots and persistent pain happen in a minority of people and can mean further treatment; ask what your quote covers and for how long.

• Knee replacement recovery depends heavily on rehabilitation, so a limited physiotherapy allowance may lead to extra spending to get a good result.

When you have two or three estimates, these questions help you see which is genuinely the better value.

• Is the quote for a standard total knee, and what do partial or robotic options cost?

• How many physiotherapy sessions are included?

• What would a manipulation or other complication cost?

• Are consultant and anaesthetist fees included or estimated?

• Are professional fees and hospital charges shown as separate lines, and is the total a firm figure or an estimate?