It's the question most people ask within about thirty seconds of hearing about weight loss injections for the first time. And it's a fair one. These treatments aren't available on the NHS for most people, which means you're paying privately. That changes the calculation.
Here's an honest, up-to-date guide to the cost of weight loss injections in the UK in 2026.
Which Weight Loss Injections Are Available in the UK?
Three main injectable treatments are currently licensed for weight management in the UK:
- Wegovy (semaglutide): a once-weekly injection, licensed by the MHRA for weight management in adults with obesity or overweight plus at least one weight-related condition.
- Mounjaro (tirzepatide): also once-weekly, licensed for the same indications, and generally showing greater average weight loss in clinical trials.
- Saxenda (liraglutide): a daily injection, the longest-established option in this category, though less commonly prescribed now that weekly alternatives are available.
Each has a different cost structure, different dose titration schedule, and different clinical profile.
What Do Weight Loss Injections Cost Per Month in the UK?
Prices vary considerably based on the treatment, the dose, the provider, and what's included. Here's a broad picture of what to expect in 2026:
Wegovy typically costs between £75 and £299 per month across UK providers, depending on dose and clinical support level. Starter dose prices (0.25mg) sit at the lower end; maintenance doses (2.4mg, 7.2mg) are significantly higher.
Mounjaro typically costs between £130 and £370 per month. The 2.5mg starter dose is at the cheaper end; the 15mg maintenance dose pushes higher. Budget providers tend to charge less; programme-based providers offering clinical oversight charge more.
Saxenda, as a daily injection, often works out similarly priced to Wegovy on a monthly basis, though it's less commonly prescribed. Its lower profile in the market means fewer comparison tools track it as actively.
Annual Cost: The Number Worth Knowing
Weight loss injection treatment is not a one-month decision. Most clinical guidelines and prescribing frameworks assume a treatment course of at least 12 months, often longer.
At moderate doses, a full year of Wegovy treatment costs in the region of £1,800 to £2,800. A full year of Mounjaro, accounting for dose titration, can cost between £2,000 and £3,500 depending on which dose you stabilise at.
These are significant sums. Plan for the full treatment cycle, not just the first month.
What Does the Price Actually Include?
This varies enormously between providers, and it's the question most people forget to ask. A monthly price from a UK weight loss injection provider might include:
- Medication only, with a prescription from a registered clinician
- Medication plus regular check-in consultations
- Medication plus a structured weight management programme
- Medication, programme, anti-nausea tablets, and a GP integration service
Two providers charging the same monthly fee can be offering very different things. Before comparing prices, understand what's in the box.
Can You Get Weight Loss Injections on the NHS?
Mounjaro (as Wegovy's equivalent in the NHS context) became available through NHS specialist services in 2023. But eligibility is strictly limited. In England, patients need a BMI of at least 40, or 35 with at least one significant weight-related condition, and must be referred through a tier 3 or tier 4 specialist service.
The NHS rollout is slow. Many patients who are clinically eligible are on waiting lists. The private market exists partly because of that gap.
If you think you might qualify for NHS access, speak to your GP first. Private treatment is not the only route.
Hidden Costs to Factor In
When budgeting for weight loss injections, account for:
- Consultation fees: some providers charge separately for the initial assessment and ongoing prescriptions.
- Delivery charges: often included but not always. Check before you compare.
- Blood test requirements: some providers require periodic blood tests to monitor treatment. These may or may not be included.
- Dose increases: your monthly cost will change as your dose goes up. Budget for the dose you're likely to reach, not where you start.
How to Find the Most Competitive Price
Use a comparison tool that shows current pricing across multiple providers for the same dose. Make sure you're comparing the full monthly cost, including delivery and consultation where applicable, and not just the headline number.
Verify that any provider you use is GPhC-registered. This is the minimum standard for a UK pharmacy and a non-negotiable requirement.
And speak to your GP before committing to any private treatment. Weight loss injections are serious medication. The clinical conversation should come before the price comparison.