A DNA test analyses your genetic code to reveal information about your ancestry, biological relationships, or health predispositions. In the UK, these tests have become widely accessible, but the type you choose depends entirely on your goal: tracing your family tree, confirming paternity, or assessing health risks. Understanding how they work and what they cost is essential before buying a kit.
The science is straightforward. Most tests use a saliva or cheek swab sample. The laboratory examines specific regions of your DNA—autosomal DNA for ancestry, or targeted markers for paternity—and compares them against reference databases or the DNA of another person. Results are typically delivered through a secure online portal within days or weeks, depending on the test’s complexity.
There are three primary categories of DNA tests available to UK consumers: ancestry tests, paternity and relationship tests, and health screening tests. A fourth category, legal tests, overlaps with paternity testing but follows strict government protocols for use in court or immigration matters. Each category has its own cost, accuracy standards, and regulatory requirements.
How Much Does a DNA Test Cost in the UK?
Prices vary widely, from around £35 to over £969, depending on the type of test, whether it is for legal or personal use, and the depth of analysis. Legal paternity tests typically start from £289 to £324 plus VAT, while home peace-of-mind paternity tests cost £89 to £99. Ancestry tests range from £79 to £100 for basic analysis, and health screening panels are usually £150 to £310.
DNA Tests in the UK: A Quick Comparison
Discover ethnic origins and find genetic relatives.
Best for: Genealogy enthusiasts.
Example: AncestryDNA
Confirm biological relationship between father and child.
Best for: Legal or personal confirmation.
Example: That DNA Company
Assess genetic risks for diseases and medication response.
Best for: Proactive health management.
Example: Bupa DNA Health Test
Used in child maintenance, inheritance, or visa disputes.
Best for: Official legal proceedings.
Example: GOV.UK service
Key Insights About DNA Testing Costs in the UK
- DNA tests fall into three main categories: ancestry, paternity/relationship, and health. Each serves a different primary need.
- In the UK, the cost of a DNA test varies significantly: from free (via government schemes in specific cases) to over £300 for comprehensive health panels.
- A legal DNA test requires a strict chain of custody (witnessed sample collection) to be admissible in court, unlike a peace-of-mind home test.
- The UK government provides guidance on using DNA tests for child maintenance and immigration, but does not offer free tests to the general public.
- Accuracy for paternity tests is typically 99.9% or higher when conducted by an accredited laboratory.
Cost Breakdown by Test Type
| Test Type | Peace of Mind (Home) Cost | Legal (Court-Admissible) Cost | Typical Results Time |
|---|---|---|---|
| Paternity (Father/Child) | £89 – £99 | £289 – £395 | 24 hrs – 5 days |
| Paternity (Mother/Child/Father) | £149 – £290 | £395 – £420 | 24 hrs – 5 days |
| Immigration Paternity | Not available | £399+ | ~5 days |
| Ancestry (Basic) | £79 – £100 | Not applicable | 2–4 weeks |
| Ancestry (Advanced/Health) | £149 – £229 | Not applicable | 2–4 weeks |
| Health & Genetic Screening | £150 – £310 | Not applicable | 2–6 weeks |
| Relationship (Sibling/Grandparent) | £199 – £249 | £249 – £310 | 5–10 days |
Prices vary by provider. Additional participants (e.g., mother, extra children) often add £42–£90 per person.
What Is the Best DNA Test for Ancestry in the UK?
For genealogy enthusiasts, ancestry DNA testing is the most popular option. These tests analyse your autosomal DNA, which is inherited from both parents and can identify relatives across all branches of your family tree. According to independent reviews, AncestryDNA is frequently rated the best overall for ancestry accuracy in the UK, priced around £94.
Types of Ancestry DNA Tests
- Autosomal: The most common type; tests DNA shared with all relatives (both genders).
- Y-DNA: Tests the paternal line (men only; women can use a father’s or uncle’s results).
- mtDNA: Tests the maternal line (both genders).
Key Providers for Ancestry
Major brands include Ancestry (£79–£94), MyHeritage (£79), Living DNA (£74.95–£179), and 23andMe (£99). Basic tests identify ethnic origins; advanced packages include wellbeing or Neanderthal data. Living DNA’s £179 package, for example, includes a breakdown of UK regional ancestry.
Ancestry tests can identify broad geographic origins and match you with genetic relatives. However, they cannot pinpoint an exact village or town of origin. Results are probabilistic, not absolute.
How Does a Paternity DNA Test Work in the UK?
Paternity DNA tests compare the DNA of a child and an alleged father to confirm a biological relationship. The laboratory analyses specific markers—short tandem repeats (STRs)—to calculate a probability of paternity. If the alleged father is not the biological parent, the test will typically show an exclusion. Accuracy is 99.9% or higher when conducted by an accredited laboratory.
Home vs. Legal Paternity Tests
The critical distinction is between a home peace-of-mind test and a legal court-admissible test. Home tests cost £89–£99 and are for personal curiosity only. Legal tests start from £289–£395 and require a strict chain of custody, meaning samples must be collected by an accredited professional. Legal paternity tests are used in child maintenance disputes, court cases, and immigration applications.
Results from a home DNA test are not accepted in UK courts or by the Home Office for immigration or visa matters. Only a test with a witnessed, documented chain of custody will be considered legally valid.
Can I Get a Legal DNA Test for Child Maintenance or Court?
Yes. The UK government provides official guidance on using DNA tests for legal purposes, including child maintenance, inheritance disputes, and applications for a child to settle in the UK. According to GOV.UK, DNA testing can be used to solve child maintenance disputes, apply for contact with a child, apply for visas for children to settle in the UK, and determine estate inheritance.
Immigration Paternity Tests
The Home Office and UK Visas and Immigration (UKVI) only accept specific immigration paternity tests, starting at around £399. These include accredited analysis and official reports. They are not available as home tests.
Are DNA Health Tests Worth It?
DNA health tests assess your genetic predisposition to certain hereditary conditions, such as cystic fibrosis, and can provide information about how your body responds to specific medications (pharmacogenomics). Standard health panels cost £150–£310, while comprehensive genomic analysis can rise to £825.
Health tests can identify specific genetic markers for inherited conditions like BRCA1/2, but they cannot predict all diseases. Many conditions are influenced by lifestyle and environment. Consult a doctor before making health decisions based on results. Some providers, like Bupa, offer DNA health tests with medical interpretation.
The Evolution of DNA Testing: A Timeline
- 1984: Discovery of DNA fingerprinting by Sir Alec Jeffreys.
- 2000s: First direct-to-consumer ancestry tests appear.
- 2010s: Rapid growth of home testing kits (AncestryDNA, 23andMe).
- 2020s: Rise of health-focused genetic testing and integration with NHS research.
- 2025: Focus on privacy, data security, and AI-driven health insights.
What DNA Tests Can and Cannot Tell You
Established Information
- Paternity tests can determine biological fatherhood with >99.9% accuracy.
- Ancestry tests can identify broad geographic origins and match you with genetic relatives.
- Health tests can identify specific genetic markers for certain inherited conditions (e.g., BRCA1/2).
Information That Remains Unclear or Limited
- Ancestry tests cannot pinpoint an exact village or town of origin.
- Health tests cannot predict all diseases; many conditions are influenced by lifestyle and environment.
- Home DNA tests are not automatically admissible in UK courts without a legal chain of custody.
How to Choose the Right DNA Test for Your Needs
The DNA test market in the UK is segmented. For genealogy, AncestryDNA is the market leader. For paternity, specialised labs like That DNA Company offer legal-grade tests. For health, Bupa provides a medical-grade service. The key decision factor is your primary goal: family history, legal proof, or health insight. Always check for UKAS accreditation if the result needs to be used legally.
What the Sources Say
“AncestryDNA is the newest DNA test which helps you find genetic relatives and expand your genealogy research.”
— Ancestry.co.uk
“DNA testing can be used in child maintenance or inheritance disputes, or applications for contact with a child or for a child to settle in the UK.”
— GOV.UK
“With our DNA health tests we can help you understand which medicines work best for you, identify your health risks.”
— Bupa UK
Is a DNA Test Right for You in 2025?
Choosing the right DNA test depends on your objective: ancestry discovery, legal proof of paternity, or health insights. The UK market offers options for every need, but understanding the differences between home and legal tests, and the limitations of each type, is essential before you buy.
Frequently Asked Questions
Can I get a DNA test for free on the NHS?
Generally, no. The NHS does not offer free DNA tests for ancestry or paternity. However, genetic testing may be available for specific medical conditions if recommended by a specialist.
How long does a DNA test take to get results?
Paternity tests typically take 3–5 working days. Ancestry tests can take 6–8 weeks from the time you mail your sample.
What is the difference between a home DNA test and a legal DNA test?
A home (peace of mind) test is for personal knowledge only. A legal test requires a witnessed, documented chain of custody to be admissible in UK courts.
Are DNA health tests worth it?
They can provide valuable insights into genetic predispositions, but they are not a substitute for professional medical advice. Consult a doctor before making health decisions based on results.
What is the best DNA test for ancestry in the UK?
AncestryDNA is frequently rated the best overall for ancestry accuracy in the UK, priced around £94. Independent reviews often recommend it for its large database and accuracy.
Can I use a home paternity test for immigration?
No. The Home Office and UKVI only accept specific immigration paternity tests with accredited analysis and official reports.
How much does a legal paternity test cost in the UK?
Legal paternity tests typically start from £289–£395. Prices vary by provider and whether additional participants (e.g., mother) are included.
What does a DNA health test screen for?
Health tests typically screen for hereditary conditions like cystic fibrosis, pharmacogenomic markers, and carrier status for certain genetic disorders.
How accurate are home DNA test kits?
Accuracy for paternity tests conducted by accredited laboratories is 99.9% or higher. Ancestry tests are highly accurate for broad regional analysis but less precise for specific locations.
Amelia Grant is Technology & Media Editor at NewsPrism.co.uk, covering AI, platforms, cybersecurity, consumer tech and the media landscape.