The Cost of Diabetes: £10bn a Year, and Most of It Preventable

Diabetes is one of the largest single costs the NHS carries — around £10 billion a year, about 6% of the whole UK health budget. The striking part is where that money goes: most of it treats complications that better, earlier care could prevent.

Turn that budget line into people and it reads very differently. Diabetes is not, for most people who live with it, a matter of billions; it is the daily discipline of managing a condition that never takes a day off — the finger-pricks and injections, the appointments, the constant arithmetic of food and activity and medication. When care is good, that work keeps people well for decades. When it falls short — through missed checks, long waits or thin support — the condition can quietly damage eyes, kidneys, nerves and feet. The money on this page is largely the cost of that preventable damage, and the human story behind it is one of harm that did not have to happen.

A £10 billion bill, mostly complications

The NHS spends at least £10 billion a year on diabetes, about 6% of the UK health budget, and around 60% of that goes on complications — not the condition itself, but the damage that follows when care falls short.

That split — roughly sixty pence in every pound spent on complications rather than on keeping people well — is really a diagram of a system reacting too late. Complications are not an inevitable part of diabetes; they are what tends to happen when the routine care that prevents them is not in place: the annual checks, the eye and foot screening, the education and support that help people manage a demanding condition. Every dislocation of that care shows up, months or years later, as damage on this chart. The money is the echo of missed opportunities.

Let that number stand on its own for a moment: one hundred and eighty-four times a week, someone in the UK loses part of a foot or a leg to diabetes. Each one is a person who will have to relearn how to walk, work and live — and the great majority began with a foot ulcer that timely, skilled care could have caught and healed. These are among the most devastating and the most preventable outcomes in the whole of medicine. That so many still happen, week after week, is not a fact of the disease; it is a verdict on how consistently the care that prevents them reaches the people who need it.

What this means day to day

For the person living with diabetes, the difference between good care and gaps in care is felt in the body and in the mind. It is the reassurance of a foot check that catches a problem while it is still small — or the slow-healing sore that no one looked at in time. It is the eye screening that protects sight, or the appointment that kept being pushed back until vision had already changed. It is also the daily mental load of self-management, and the anxiety that builds when the system feels distant or overstretched — the worry about what is happening to your kidneys, your nerves, your future, when reviews are hard to come by. Good diabetes care is quiet and preventive; its absence is loud and life-changing.

None of this is about individual willpower or blame. People living with diabetes are managing a relentless condition largely on their own, day and night, and doing so with remarkable diligence. When complications follow, the cause lies overwhelmingly in whether the care system delivered the checks, the specialist support and the early intervention it knows work. The failure, where there is one, is structural — and structures can be fixed.

Why it matters

Around 4.6 million people in the UK are living with diagnosed diabetes, and the total cost to the country has been estimated at close to £14 billion a year. Because so much of the spend is on avoidable complications, the case for investing in prevention and routine care is also an economic one. This is about how care is organised, not about blaming people with diabetes.

Here the moral case and the financial case point the same way, which does not happen often. Spending earlier — on the checks, the screening, the podiatry and the support that prevent complications — would spare people amputations, sight loss and kidney failure, and would cost the country less than clearing up the damage afterwards. A pound spent keeping someone well is worth far more than a pound spent responding to the crisis that follows neglect. Framed that way, the current split on the chart is not just a health failure; it is a false economy paid for in people's bodies.

Why we're publishing this

Health Insurance UK is a commercial health-insurance resource, not a charity or a campaign. We drew these figures together because the diabetes charities, healthcare professionals and people living with the condition who are calling for better routine care deserve to have the evidence — the scale of the cost, and how much of it is preventable — set out plainly and made easy to cite. We are not speaking over anyone. We are amplifying a case they have long been making, and standing with them as they press for change.

How to read this data

Cost figures are from Diabetes UK and a University of York cost-of-illness study; prevalence counts diagnosed cases and estimates vary with method and year. Confirm the latest figures before publishing. This is analysis of published data, not new research.

Use this data

Free to cite with attribution to Health Insurance UK. For the figures or a bespoke chart, get in touch.