Weight loss injections work. The clinical evidence is clear and the results are real. But before you commit to treatment, you need to understand what you are actually going to pay — because the costs are significant, prices vary enormously between providers, and the headline figure you see advertised is rarely the full picture.
This guide gives you the complete 2026 price breakdown for every major weight loss injection available in the UK — Wegovy, Mounjaro, Ozempic, and Saxenda — covering NHS costs, private prescription prices by dose, what is and is not included, and practical strategies to reduce what you pay.
The Short Answer
Private weight loss injections in the UK cost between £100 and £340 per month depending on which medication you take and which dose you are on. NHS access is available for some patients at the standard prescription charge of £9.90 in England and free in Scotland, Wales, and Northern Ireland — but waiting lists of 12 months or longer make private prescription the reality for most people who want to start treatment now.
Over a full year at maintenance doses, most patients pay between £1,800 and £4,000 in medication costs alone.
Wegovy Cost in the UK
Wegovy is semaglutide 2.4mg weekly — the version of semaglutide licensed specifically for weight management in the UK.
Private prescription prices by dose:
0.25mg (starter, weeks 1–4): £100–£150 per month 0.5mg (weeks 5–8): £120–£170 per month 1mg (weeks 9–12): £140–£200 per month 1.7mg (weeks 13–16): £160–£240 per month 2.4mg (maintenance): £200–£299 per month
Most people reach the maintenance dose after approximately 16–20 weeks. Your first few months on Wegovy are cheaper because you are on lower doses — factor this into your budget planning.
Annual cost estimate (private): Titration phase (months 1–5): approximately £700–£1,000 Maintenance phase (months 6–12): approximately £1,400–£2,100 Total year one: approximately £2,100–£3,100
NHS cost: £9.90 per prescription item in England. Free in Scotland, Wales, and Northern Ireland. Requires referral to a Tier 3 specialist weight management service — waiting lists of 12–18 months in most areas.
Mounjaro Cost in the UK
Mounjaro is tirzepatide — the dual GLP-1 and GIP receptor agonist that produces stronger weight loss than semaglutide in clinical trials. It is currently the most effective licensed weight loss medication in the UK.
Important pricing context: Eli Lilly raised the UK list price of Mounjaro by up to 170% on 1 September 2025. The maintenance doses nearly tripled in price overnight. Most private providers passed this increase directly to patients.
Private prescription prices by dose:
2.5mg (starter, weeks 1–4): £120–£220 per month 5mg (weeks 5–8): £150–£240 per month 7.5mg (weeks 9–12): £180–£265 per month 10mg (weeks 13–16): £210–£295 per month 12.5mg (weeks 17–20): £250–£330 per month 15mg (maintenance): £270–£340 per month
Most competitive UK pricing currently: Asda Online Doctor from approximately £149/month at starter doses, with all-in pricing that includes prescription and aftercare. Always verify current prices directly with any provider before committing.
Annual cost estimate (private): Titration phase (months 1–5): approximately £850–£1,300 Maintenance phase (months 6–12): approximately £1,900–£2,400 Total year one: approximately £2,750–£3,700
NHS cost: £9.90 per prescription in England. Free in Scotland, Wales, and Northern Ireland. NHS GP prescribing expanded significantly in 2026 — ask your GP whether your practice is participating in the QOF Mounjaro scheme. Availability varies by region.
Ozempic Cost in the UK
Ozempic is semaglutide at doses up to 2mg weekly, licensed in the UK for type 2 diabetes only. It is not licensed for weight management — Wegovy is the appropriate medication for that indication. However, Ozempic is sometimes prescribed off-label for weight loss by UK registered prescribers.
Private prescription prices: 0.5mg: £80–£130 per month 1mg: £100–£160 per month 2mg: £120–£190 per month
NHS cost: Ozempic is available on NHS prescription for type 2 diabetes. If you have type 2 diabetes and your GP considers it clinically appropriate, Ozempic may be prescribed through normal NHS channels — more accessible than Wegovy or Mounjaro for diabetes patients because it does not require specialist referral in many cases.
Saxenda Cost in the UK
Saxenda is liraglutide 3mg daily — one of the older GLP-1 weight loss medications, requiring a daily injection rather than weekly. It produces less weight loss than Wegovy or Mounjaro (approximately 5–8% of body weight) but remains licensed for weight management and is sometimes prescribed as a first-line option or when newer medications are unavailable.
Private prescription prices: Approximately £150–£250 per month.
Saxenda is less commonly prescribed in 2026 given the availability of more effective once-weekly options. It may be relevant if you have tried and not tolerated weekly injections, or if an insurer requires step therapy.
Full Comparison Table: UK Weight Loss Injection Costs 2026
| Medication | Active Ingredient | Injection | Private Cost/Month | NHS Available |
|---|---|---|---|---|
| Wegovy | Semaglutide | Weekly | £100–£299 | Yes (Tier 3, limited) |
| Mounjaro | Tirzepatide | Weekly | £120–£340 | Yes (GP from 2026) |
| Ozempic | Semaglutide | Weekly | £80–£190 | Yes (diabetes only) |
| Saxenda | Liraglutide | Daily | £150–£250 | Limited |
What Is and Is Not Included in Private Prices
This is where most people get caught out. The monthly price you see advertised by UK online clinics often refers to the medication cost only. Additional charges can include:
Initial consultation fee: £30–£150 depending on provider. Some clinics include this in the monthly price, others charge separately for the first assessment.
Follow-up appointments: Some providers include regular clinical check-ins in the monthly cost. Others charge per appointment — typically £20–£50 each.
Delivery charges: Usually free for regular deliveries, but some providers charge for express or refrigerated delivery.
Needles and injection supplies: Usually included with the medication pen. Confirm this with your provider.
Blood tests: Some programmes require baseline blood tests before starting and periodic monitoring during treatment. These may be charged separately.
The right question to ask any provider: What is the total cost per month including consultation, medication, delivery, and any required follow-up appointments?
How to Reduce the Cost of Weight Loss Injections in the UK
Get on the NHS waiting list now. Even if you plan to go private, registering with your GP for NHS referral costs nothing. Some people reach the front of the NHS list after 12–18 months — by which point they may have lost significant weight privately already. The NHS route then becomes available for continued treatment.
Ask your GP about the NHS Mounjaro QOF scheme. From April 2026, GPs can prescribe Mounjaro for obesity through the NHS Quality and Outcomes Framework. From June 2026 the BMI threshold drops to 35 with four qualifying conditions. If you qualify, this is free or near-free treatment through your GP.
Compare total costs, not headline prices. A provider advertising £99/month may charge £50 for the initial consultation and £30 per follow-up — making the true monthly cost substantially higher than a competitor charging £179 all-in.
Start on the lower titration doses and do not rush. Your first months at lower doses cost less. Slower titration also reduces side effects, which means better adherence — and better results.
Check whether your private health insurance covers it. Some UK private health insurance policies cover weight management medication. This varies by policy and insurer — check your policy documents or call your insurer directly.
Use a Prescription Prepayment Certificate (PPC) if you have NHS access. If you are paying NHS prescription charges for any medication, a PPC caps your annual cost. A 12-month PPC currently costs significantly less than paying individual prescription charges throughout the year.
Does Private Health Insurance Cover Weight Loss Injections?
Historically, most UK private health insurance policies excluded weight management medications. This is changing — driven by the same evidence that convinced NICE to approve these medications on the NHS.
Some AXA, Bupa, and Vitality policies now include weight management medication coverage under specific conditions. Coverage typically requires a clinical diagnosis of obesity as a disease rather than a lifestyle choice, documentation of BMI and comorbidities, and prior authorisation from the insurer.
If you have private health insurance, it is worth calling your insurer specifically to ask whether Wegovy or Mounjaro is covered under your plan. Do not assume the answer is no — the landscape is shifting faster than policy documents are being updated.
The Real Total Cost: A Realistic Budget Guide
Here is what a realistic budget looks like for two common scenarios:
Scenario A — Wegovy private, one year: Initial consultation: £50 Months 1–5 titration: £700 Months 6–12 maintenance: £1,400 Follow-up appointments (6): £120 Estimated total: £2,270
Scenario B — Mounjaro private, one year: Initial consultation: £50 Months 1–5 titration: £1,000 Months 6–12 maintenance: £2,100 Follow-up appointments (6): £120 Estimated total: £3,270
These are estimates. Your actual costs depend on your provider, the dose you reach at maintenance, and how quickly you titrate. Some people reach full results at 10mg Mounjaro and never need the 15mg dose — which saves meaningful money each month.
Is the Cost Worth It?
This is a personal question only you can answer, but here is the context that helps frame it.
The average weight loss on Wegovy is 14–17% of body weight. On Mounjaro it is 20–22%. For a person starting at 100kg, that is 14–22kg of weight loss over 72 weeks. The health benefits of that degree of weight loss — reduced blood pressure, improved blood sugar, lower cardiovascular risk, better joint health, improved sleep — are well-documented and significant.
For many people the question is not whether the medication works. It is whether they can afford to maintain treatment long-term, given that weight typically returns when the medication is stopped.
The most cost-effective approach for most people is to start treatment now at private rates, pursue NHS access simultaneously, and transition to NHS prescribing if and when it becomes available — using the weight already lost as evidence of a good clinical response.
Frequently Asked Questions
What is the cheapest weight loss injection available in the UK? At private prescription rates in 2026, Ozempic at the starter dose (0.5mg) is typically the cheapest option at £80–£130 per month, but it is licensed for diabetes only. For weight management specifically, Wegovy at the starter dose (0.25mg) at approximately £100–£150 per month is the most affordable licensed option.
Why is Mounjaro so expensive now? Eli Lilly increased the UK list price of Mounjaro by up to 170% in September 2025 to align with European market pricing. The increase was particularly steep at higher doses — the 15mg pen went from approximately £122 to £330 per month at list price.
Can I get weight loss injections on the NHS for free? If you qualify and can access NHS treatment, prescription charges are £9.90 per item in England and free in Scotland, Wales, and Northern Ireland. NHS eligibility is strict and waiting lists are long — most people currently on these medications are paying privately.
Is it cheaper to buy weight loss injections from abroad? Purchasing prescription medications from unregistered overseas sources is illegal in the UK and dangerous. MHRA-regulated medications from GPhC-registered pharmacies are the only legal route — there are no legal shortcuts on cost from overseas purchases.
Do costs go down once you reach the maintenance dose? Not necessarily. Higher doses often cost more per pen. However, some people reach their effective dose at 10mg or 12.5mg and do not need to progress to the 15mg maximum — which does reduce ongoing costs.