Paternity DNA Tests in the UK (2026): Home vs Legal, Costs and Best UK Labs
Important — information, not legal or medical advice
Paternity testing decisions often sit next to family-law, child-welfare, or immigration questions. This guide explains how the UK market works and how providers compare. For anything legally consequential (CMS, family court, Home Office, birth-certificate amendments), talk to a family-law solicitor before ordering anything. Read our full disclaimer.
A paternity DNA test answers one question: is this man the biological father of this child? The science underneath has been settled for two decades — modern STR-based DNA testing gives a result of either >99.99% probability of paternity (an inclusion) or 0% (an exclusion). Where UK consumers actually get confused is everything around the science: which test you need depends on what you plan to do with the result, not on what you want to know.
This guide walks through the two halves of the UK market — home (peace-of-mind) tests and legal (court-admissible) tests — the prices in 2026, the labs worth considering, and the practical decisions you'll need to make before ordering.
The 90-second answer
If you only read one box
- Personal/family curiosity, won't go to court or CMS: a home (peace-of-mind) paternity test. £89–£169 from a UK lab, 3–5 working days, you collect cheek swabs at home. Result is not admissible in any UK court or to the Child Maintenance Service.
- Anything that could end up in court, CMS, Home Office, or on a birth certificate: a legal (court-admissible) paternity test from a Ministry of Justice-accredited UK lab. £285–£500 standard. Sampler attends to collect cheek swabs from all parties with photo ID; chain-of-custody documented end to end.
- Best home test for value: AlphaBiolabs — UK lab (Warrington, UKAS-accredited), £89 home test with next-day option, on the Ministry of Justice accredited list for legal tests too.
- Best for legal/court-admissible: any lab on the UK government's accredited list. AlphaBiolabs, Cellmark, Eurofins Forensic, Anglia DNA and DDC are all reputable and regularly included. Avoid any "legal" service from a lab not on that list.
- Don't bother with: tests that promise legal admissibility for under £200 (almost certainly not actually MoJ-accredited), or peace-of-mind tests that try to upsell you a "legal upgrade" after results come in — chain-of-custody can't be retroactively added.
Home vs legal: the only distinction that really matters
Every UK paternity test falls into one of two buckets. The DNA science is identical. What differs is how the samples are collected and documented.
Home (peace-of-mind) tests
You order online. A kit arrives in the post containing cheek-swab applicators (usually 4 per person), small envelopes, and a return paid envelope. You swab the inside of each person's cheek, leave the swabs to dry briefly, seal them in the envelopes, post them back to the lab. Results land via secure portal or email in 3–5 working days from receipt.
The accuracy is, in lab terms, identical to a legal test — the same STR markers, the same analysis, the same statistical thresholds. What you don't get is any independent verification that the samples actually came from the people named on the form. The lab tests the swabs that arrived; it has no way of knowing whose cheeks they came from. That's exactly why a UK court won't accept the result.
Home tests are appropriate when both adult participants have consented, the result is for personal information only, and no one plans to use it for anything official. Common legitimate uses:
- A father and the child's mother want to confirm or rule out biological paternity privately, with no court or CMS involvement intended.
- Adult children seeking to confirm what they already strongly suspect about their parentage, with the consent of the alleged parent.
- Resolving family questions where everyone involved has agreed in advance to accept the result without external proceedings.
Home tests are not appropriate when there's any chance the result becomes legally consequential. You cannot retroactively make a home result legally admissible. If you might eventually need a legal test, order the legal test now — paying for a home test first then a legal test later is paying twice.
Legal (court-admissible) tests
The lab must be on the Ministry of Justice's accredited list (reviewed annually; the current list is on gov.uk). Sample collection is carried out by a neutral approved sampler — usually a GP, a registered nurse, or a sampler appointed by the lab — at a time and location arranged through the lab. Each participant presents photo ID, which the sampler verifies and photographs. Samples are sealed in tamper-evident packaging with the sampler's signature and shipped to the lab using a tracked chain-of-custody protocol. The lab's report names the sampler, the date, the location, and the documents verified.
That documentation is what makes the result admissible. UK family courts, the Child Maintenance Service, HM Passport Office, and the Home Office (for immigration) will accept a report from any lab on the MoJ list that follows this process. They will not accept anything else.
Legal tests are required for:
- Family court proceedings involving disputed paternity.
- Child Maintenance Service paternity disputes (CMS will direct you to an accredited lab; some are part-funded if you meet the criteria).
- Adding or amending a father's name on a UK birth certificate where the man named has died or is otherwise unable to attend the General Register Office.
- UK immigration applications where biological relationship needs to be evidenced (Home Office accepts results from MoJ-list labs).
- Some inheritance and probate disputes.
What UK paternity tests cost in 2026
Prices verified May 2026 from public UK provider pages. Sampler attendance fees for legal tests vary by location (typically £40–£90 on top of the lab fee, sometimes included).
| Test type | Typical price | Turnaround | Use case |
|---|---|---|---|
| Home (peace-of-mind) — father + child | £89–£129 | 3–5 working days | Personal information only |
| Home — father + child + mother | £89–£169 (mother often free) | 3–5 working days | Slightly higher statistical power; same legal status (none) |
| Home — next-day express | £159–£249 | 1 working day from receipt | Urgent personal answer |
| Legal — standard trio (mother, child, alleged father) | £285–£395 | 5–10 working days | Court, CMS, birth certificate, immigration |
| Legal — duo (alleged father + child only) | £249–£349 | 5–10 working days | As above where mother is unavailable |
| Legal — express turnaround | £395–£550+ | 3–5 working days | Time-pressured court matters |
| Each additional alleged father (legal or home) | +£90–£150 | Same | Multiple possible fathers |
Two consistent traps in UK pricing:
- "From £X" headlines. Some labs advertise a low price that's the analysis fee only, with sampler attendance billed separately. Always check whether the quoted legal-test price includes sampler attendance or not. Reputable labs are upfront about this in writing before you book.
- "Legal upgrade" offers. A handful of services market a peace-of-mind test with the option to "upgrade to legal" after you receive the result. This is not how UK legal testing works. Chain-of-custody is the legal-admissibility requirement; you can't retroactively chain-of-custody a sample that arrived in a Royal Mail envelope. If you might need a legal result, order a legal test from the start.
Best UK labs for paternity testing
Our picks below are restricted to labs that meet our basic editorial threshold for this space: UK-based or UK-operating, UKAS-accredited for DNA testing (ISO 17025 or ISO 15189), with transparent pricing in £, and — for the legal-test recommendations — on the current Ministry of Justice accredited list.
AlphaBiolabs — best all-round UK paternity testing
AlphaBiolabs is a Warrington-based UKAS-accredited laboratory and one of the most consistently visible names in UK consumer DNA testing. Home paternity tests start at £89 with next-day analysis on receipt. They're on the Ministry of Justice accredited list for legal paternity testing, with sampler attendance arranged through a UK-wide network. They also run drug, alcohol, and immigration DNA testing, which means the same lab can handle whatever the result leads to.
Best for: anyone who wants a single UK lab to handle both a home test now and (if needed) a legal test later, without changing provider mid-process.
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AffinityDNA — high-touch UK paternity tests with strong customer service
AffinityDNA is part of the DNA Worldwide group and offers home and legal paternity testing with a more concierge-style customer experience — a named UK case manager, telephone support, and detailed result explanation. Pricing sits in the middle of the range (~£99–£149 home, ~£329 legal). Worth considering if you'd value a human contact during what can be an emotionally heavy process rather than a portal-only service.
easyDNA UK — competitive home test pricing, sister lab to AffinityDNA
easyDNA UK sits within the same group as AffinityDNA but markets to a slightly more price-led segment. Home paternity tests from £89, broad menu of relationship tests (sibling, grandparent, avuncular), legal testing available. Quality is identical to AffinityDNA (same lab pipeline); the difference is the customer-service depth and the branding.
International Biosciences (IBDNA) — established UK consumer DNA brand
International Biosciences has been in the UK consumer DNA market for ~20 years, with a full menu of paternity, maternity, sibling, and prenatal paternity tests. Home paternity from ~£99, legal tests in the £300–£400 range. Solid choice with no particular standout — a safe, mid-pack pick.
Cellmark — premium UK lab, no consumer affiliate (editorial mention only)
Cellmark is one of the longest-established UK DNA labs (Abingdon-based, used by UK police and family courts for decades). Home paternity from ~£169, legal from £324 + VAT. They sit at the higher end on price but are the most respected name in UK legal DNA testing. We list them as a reference rather than promote them — they don't run a consumer affiliate programme, so there's no commercial incentive in mentioning them. Genuinely worth considering if your case is high-stakes (contested family court matters in particular).
Can you do a paternity test without the mother's DNA?
Yes — and this is one of the most common UK reader questions. Modern STR analysis can establish paternity to >99.99% probability using only the alleged father and child. The mother's DNA helps slightly with statistical confidence (because it lets the lab subtract her contribution to the child's genome and isolate the paternally inherited markers), but it is not required for a definitive result.
Every UK lab we cover offers father-and-child-only ("duo") testing. Adding the mother typically costs £20–£40 extra; some labs include her free.
Where the mother's DNA matters more is in edge cases:
- Twin or sibling alleged fathers (very rare, but the mother's DNA helps disambiguate).
- Cases where the child has been adopted by the mother's new partner and family questions arise later.
- Some prenatal paternity scenarios (where the mother's blood sample is the source of fetal DNA, so her sample is inherent to the test).
Consent and the Human Tissue Act
The UK's Human Tissue Act 2004 makes it a criminal offence (Section 45) to have a person's DNA analysed without "qualifying consent" — with exemptions for medical, criminal-justice, and certain excepted purposes. In practice, this means:
- Adults consent for themselves, in writing, on the lab's consent form.
- Children under 16 are consented for by a person with parental responsibility (usually but not always the mother). If both parents have parental responsibility, only one needs to consent for the child to be tested — but reputable labs may decline to test a child where there's clear disagreement between consenting parents and ask for legal clarification first.
- Surreptitious samples — a discarded toothbrush, hair from a hairbrush, a chewed straw — cannot lawfully be tested without consent except for excepted purposes. Reputable UK labs will refuse to accept these. Services that advertise "discreet" testing of unconsented samples should be avoided; the result is not legally usable even if you obtain it, and you may have committed an offence in collecting the sample.
If the alleged father refuses to consent, the practical route is to apply through the family court for a court-ordered DNA test. A family-law solicitor can advise on the threshold and process; the test itself is then carried out by an MoJ-accredited lab on the court's order.
How to choose: a 60-second decision tree
- Will the result ever be used in court, CMS, the Home Office, or to change a birth certificate? → Yes: order a legal test from an MoJ-accredited lab. Skip the home kit entirely.
- Is everyone old enough to consent and willing to consent? → No (one adult won't agree, or parents disagree on testing a child): a home test is not the answer. Talk to a family-law solicitor about court-ordered testing.
- Is the result for personal information only, with all parties on board? → Yes: a home test is the right choice. AlphaBiolabs at £89 is the value pick; AffinityDNA if you want more customer-service hand-holding.
- Is the alleged father unavailable (deceased, unwilling, unreachable)? → Consider a grandparent or avuncular DNA test (less conclusive than direct paternity but the only option in these cases). Most major UK labs offer them; we'll cover this in a dedicated guide.
- Is the child not yet born? → A non-invasive prenatal paternity (NIPP) test uses a maternal blood sample from ~9 weeks gestation. Available from ~£700–£1,200 in the UK from specialised providers. Sensitive area — we'll cover separately.
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Frequently asked questions
Can I do a home paternity test and use the result in court?
No. UK courts will not accept results from a home-collected paternity test, regardless of which lab analyses the sample. The chain-of-custody documentation is what makes a legal test admissible — you can't add it after the fact. If the result might end up in court, order a legal test from a Ministry of Justice-accredited lab from the start.
How accurate are home paternity tests?
The DNA analysis is identical to legal testing — typically >99.99% probability of paternity when paternity is confirmed, and 0% (definitive exclusion) when it is not. The most common source of error is sample contamination during home collection (eating, drinking or smoking in the 30 minutes before swabbing). Follow the instructions exactly and the result is effectively as accurate as a lab-collected sample.
How long does a paternity test take in the UK?
Standard home tests: 3–5 working days from when the lab receives the samples. Legal tests: 5–10 working days from sample collection. Next-day and same-day express turnaround is available from most major labs for an extra £70–£150. None of these timings start until the lab physically has the samples — Royal Mail transit adds 1–3 days.
Does the NHS do paternity tests?
No. The NHS does not provide paternity DNA testing as a clinical service. The only NHS-adjacent route is via the Child Maintenance Service, which can order a paternity test in disputed maintenance cases — the test itself is carried out by a private MoJ-accredited lab, sometimes part-funded by CMS depending on the outcome and your circumstances. For all other purposes, UK paternity testing is a private-sector service.
What's the cheapest legal paternity test in the UK?
As of mid-2026, prices for legal trio tests from MoJ-accredited UK labs start around £285–£300 inclusive of sampler attendance. Be cautious of anything advertised significantly below this — confirm the lab is on the current MoJ list before paying.
Can I do a paternity test if the alleged father has died?
Direct paternity testing isn't possible without the alleged father's DNA, but you can establish biological relationship through close relatives — typically the alleged father's parents (a paternal grandparent DNA test) or full siblings (an avuncular/aunt-uncle DNA test). These give probability results rather than the >99.99% certainty of direct paternity, and the strength of the result depends on which relatives are available. Most major UK labs offer these tests; a dedicated guide is on our roadmap.
Related guides on this site
- Prenatal Paternity Test UK — the same biological question, answered from 8 weeks of pregnancy via a safe maternal blood draw (NIPP). £700–£1,200 in 2026.
- Legal vs Peace-of-Mind DNA Tests UK — the deeper walk-through of chain-of-custody and when a legal test is required.
- Sibling DNA Test UK — when the alleged father isn't available and you're testing through siblings instead.
- Grandparent and avuncular DNA tests UK — establishing paternity via the alleged father's relatives.
- UK DNA tests overview — the full index of guides in this section.
- How to choose a private blood test in the UK — the equivalent decision guide for blood testing.
- Affiliate disclosure — how we make money and how we keep editorial picks honest.
- Our methodology — how we research, verify, and rank.