Hepatitis B Surface Antigen

This test checks for Hepatitis B Surface Antigen, which shows whether you have been infected with Hepatitis B within the past few weeks. It suits anyone wanting a fast, at-home check after a possible exposure.

  • At-home test
  • Doctor reviewed
Sample
Blood
Collection
At-home finger-prick or venous draw at clinic or nurse home visit
Results in
1 day
Biomarkers
1
Doctor reviewed
Yes
Tests for
  • Hepatitis B Surface Antigen (anti-HBsAg)

Test specifications

Sample type
blood
Collection method
at-home finger-prick or venous draw at clinic or nurse home visit
Turnaround time
1 day
Biomarkers tested
1
At-home test
Yes
Doctor reviewed
Yes
Gender focus
Both

What's tested

1 biomarker as listed by Blue Horizon Medicals.

  • Hepatitis B Surface Antigen (anti-HBsAg)

About this test

Hepatitis B Surface Antigen is a marker used to show whether you have been infected with Hepatitis B, generally detectable from around 3-4 weeks after exposure. The provider is explicit that testing too soon after a possible exposure can give an inconclusive result, so a repeat test some weeks later is advised if the risk is thought to be high.

Within the eight Hepatitis B tests we compare, this sits near the bottom of the price range at £45.25, matched only by Blue Horizon's own Core Antibody IgM test and beaten only by LloydsPharmacy Online Doctor's £43 immunity check; the group median is £79.25. It is also one of the few in the group that can be done as an at-home finger-prick sample rather than requiring a clinic visit.

That combination drives a strong overall score: full marks for collection convenience, since it can be done at home or via a venous draw and nurse visit, and a high value-for-money score given the below-median price. Results are reviewed by a doctor, and Blue Horizon has traded since 2009 with a 4.2 Trustpilot score from 395 reviews and lab work through UKAS ISO 15189 partner labs.

Who is it for?

This suits anyone who has had a possible Hepatitis B exposure and wants a low-cost, at-home check of whether an infection is present, without needing to travel for a venous blood draw. It is not a test for immunity or past, resolved infection.

If you would rather have someone else take the sample, or want a slightly cheaper option, LloydsPharmacy Online Doctor's Hepatitis B immunity test is £43, though that measures immunity rather than active infection, so it answers a different question.

How it works

You can take this as an at-home finger-prick sample, or opt for a venous draw at a clinic, Circle Hospital or Superdrug store, or a nurse home visit; the option is selected at checkout. Once your sample reaches the lab, results are reviewed by a doctor and are typically back within 1 day.

Pros & cons

Pros

  • Can be done at home with a finger-prick sample, unlike most tests in this comparison group.
  • One of the cheapest Hepatitis B tests we compare, at £45.25 against a £79.25 median.
  • A doctor reviews your result before you receive it.
  • Results back within 1 day despite the at-home collection option.

Cons

  • Provider warns results can be unreliable within 3-4 weeks of exposure, so retesting may be needed.
  • Only checks for current infection, not past infection or immunity.

Our editorial score

Compare Health Test Score Cheap, at-home Hepatitis B antigen test with fast results
Editorial confidence: 10.0/10

Hepatitis B Surface Antigen shows whether you've been infected with Hepatitis B within roughly the last month. At £45.25 it is tied with Blue Horizon's own IgM test as the second-cheapest option in this group, just above LloydsPharmacy's £43 immunity check, and it can be done as an at-home finger-prick. Results may be unreliable within 3-4 weeks of exposure.

Score breakdown

  • Clarity and documentation 9.0/10

    The listing publishes a detailed description, the full biomarker list, a stated turnaround, clear collection options, the sample type; it does not state what the report looks like.

  • Clinical depth 7.5/10

    A single-marker test measuring exactly what it sets out to; depth is not the point of this comparison group.

  • Collection convenience 10.0/10

    A finger-prick sample you take at home; with a venous or clinic option as well; a home nurse visit is offered; results in around 1 days, well ahead of the sexual health norm of 2.

  • Results and follow-up 7.0/10

    Results are reviewed by a doctor; the provider does not describe the report format.

  • Trust signals 7.5/10

    Trustpilot 4.2 from 395 reviews; accredited lab (UKAS ISO 15189 partner labs); trading 17+ years.

  • Value for money 9.5/10

    £45.25 against a comparison-group median of £79.25 (-43%).

Calculated 13 September 2026 from the facts we hold about this test and provider, using our published scoring formula. Scores are not hand-edited.

Compare with similar tests

This test belongs to our Hepatitis B test comparison group. See how it stacks up against equivalent tests from other providers.

View all →

Hepatitis B Immunity Blood Test

Not the cheapest hepatitis B immunity check available

Checks for hepatitis B surface antibodies to confirm immunity from vaccination or past infection; it does not detect a current infection. Suits people who need proof of protection for work, travel or healthcare requirements.

  • At-home test
8.2 / 10