How much does an HbA1c test cost?
Free from your GP if you have symptoms or a higher risk. One NHS-lab kit costs £32. But a high home result needs a GP test, and one sample type reads closer to a lab.
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How much does an HbA1c test cost?
Nothing, if you go through your GP. The NHS says to see a GP if you think you may have type 2 diabetes, or if you have a higher risk.
HbA1c shows your average blood sugar over the last 2 to 3 months. You don’t need to fast for it.
Paying is optional. Some pharmacists offer blood tests, but Diabetes UK says you pay for these, unlike through your doctor. One home kit tested in an NHS lab costs £32 (price checked October 2026).
| Option | Cost | Can it confirm diabetes? |
|---|---|---|
| GP blood test | Free on the NHS | Yes. A lab tests your sample. |
| NHS Health Check (40 to 74, no existing condition) | Free | It may include a blood sugar test. |
| Pharmacy risk check | Usually a fee | No. It’s a set of questions, not a diagnosis. |
| Home HbA1c kit tested in an NHS lab | £32 (one kit, adults 18+) | No. A high result needs a GP test. |
| Blood sugar meter | Varies | No. It shows only your sugar at that moment. |
| Diabetes UK Know Your Risk | Free online | No. It gives your risk level. |
Sources: Diabetes UK; NHS Health Check; Monitor My Health; Know Your Risk
Have symptoms or a higher risk? Start with your GP. It’s free, and a lab result from your surgery is what confirms diabetes.
Are home HbA1c tests accurate?
The good ones come close. It depends on how your blood travels to the lab.
That’s the small tube. A review of 30 studies found blood posted in a tiny tube read much closer to a vein sample than dried spots on a card.
| How the blood is posted | Average gap from a vein test (mmol/mol) | What it means |
|---|---|---|
| Small tube | -0.4 to 1.4 | Close to a lab test. |
| Dried spots on a card | -4.3 to 7.2 | Can be off by enough to change your band. |
Source: Colley 2023, Diabetic Medicine
A gap of 7 matters. It’s enough to move a 41 (lower risk) to a 48 (diabetes range).
Two later studies of home tube samples, one sent by standard post, also matched a vein sample closely.
Most of these studies were in people who already had diabetes and were checking it. So a home result is a good guide, but it doesn’t replace your GP’s test.
Before you buy, check the kit says your blood goes into a small tube. More on finger-prick accuracy and how to do a finger-prick test.
What does my home HbA1c result mean?
Diabetes UK says 48 mmol/mol or above is diabetes, and 42 to 47 is prediabetes. Some kits give a percentage: 42 to 47 is 6.0 to 6.4%, and 48 is 6.5%.
- Below 42 mmol/molGenerally lower risk. Higher risk: check yearly.
- 42 to just under 48 mmol/molPrediabetes. NICE: high risk.
- 48 mmol/mol or aboveDiabetes range. Lab repeat if no symptoms.
Sources: Diabetes UK; NICE PH38; Gloucestershire NHS lab
48 or more with no symptoms? NICE says to carry out a second blood test. One NHS lab repeats it from a vein within 2 weeks.
42 to 47? That lab says to give lifestyle advice and check HbA1c at least once a year. See prediabetes blood tests and how to lower HbA1c.
Under 42 is generally lower risk. Under 48 doesn’t rule out diabetes found by other sugar tests. More in normal HbA1c levels.
If you have a higher risk, the lab says to check it yearly.
Is a blood sugar checker or online test enough?
No. A blood sugar meter shows only your sugar at the moment you test, and Diabetes UK says it can’t diagnose diabetes.
Think of a meter as today’s weather. HbA1c is more like the average over the last 2 to 3 months. One hot day doesn’t make a hot summer.
A sensor worn on your arm may show high sugar, but it won’t confirm diabetes either. See CGM vs HbA1c.
The free online test is Diabetes UK’s Know Your Risk. It takes about 5 minutes and rates your risk as low, medium, high or very high. It may give you a letter to take to your GP.
Not sure if you need a test? Do that first. It’s free and shows whether a GP visit is your next step.
When is a home HbA1c test the wrong choice?
When sugar may be rising fast. Type 1 diabetes can start quickly, so HbA1c may not be raised yet. The NHS-lab kit isn’t meant for anyone who may have type 1.
One NHS lab says HbA1c shouldn’t be the only test if you:
- are under 16 and have symptoms
- have signs of type 1 diabetes, at any age
- have had symptoms for less than 2 months
- are at high risk of diabetes and suddenly unwell
- are pregnant
- take medicines that may raise sugar fast, such as steroids or antipsychotics (medicines for some mental health conditions)
- have recent damage to, or had surgery on, your pancreas (the gland that makes insulin)
- have stage 4 or 5 kidney disease, or HIV, or take HIV medicines (anti-retrovirals)
Anything that changes how long your red blood cells last can affect the result, such as iron deficiency anaemia. Never stop or change a prescribed medicine without your prescriber.
Before you buy a home HbA1c kit
- Think you may have type 1 diabetes? Ask for an urgent GP appointment or use NHS 111 instead.
- Check the kit tests HbA1c, not just your sugar at that moment.
- Check your blood goes into a small tube, not dried spots on a card.
- Check a lab tests your sample.
- Eat as normal. You don’t need to fast for HbA1c.
- Got 48 or more? Book your GP for a second blood test.
Sources: Diabetes UK; NHS; Monitor My Health; Colley 2023
When to speak to a GP
Peeing more, very thirsty and tired? Call 999 or go to A&E if you also get worse quickly or have stomach pain, diarrhoea or sickness. The same goes if you feel sleepy or confused, or breathe faster and deeper than usual.
- You think you or your child may have type 1 diabetes. Ask for an urgent GP appointment or use NHS 111.
- You feel very tired, pee more than usual, feel thirsty all the time or lose weight without trying. These are the most common signs of type 2 diabetes.
- You or your child may have a higher risk: white and over 40, or over 25 and South Asian, Chinese, Black African or Black Caribbean; a parent, brother or sister with diabetes; overweight and not very active; or high blood pressure.
- Your home HbA1c is 48 or more. You’ll need a second blood test to confirm it.
- Your home HbA1c is 42 to 47. Ask about a yearly retest.
Not everyone with type 2 diabetes has symptoms. Aged 40 to 74 with no existing condition? Ask your GP surgery or pharmacy for a free NHS Health Check.