Best Interest Assessors: What They Do & How to Become One in 2026

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Last Updated on: September 18, 2026

Publisher disclosure: Zion Blogger is an educational publishing site, not a legal, medical or social care authority. If you have an active case, please seek advice from a qualified local professional or your local authority.


TL;DR: A Best Interests Assessor (BIA) is a professional who carries out a specific legal assessment for people who may be having their liberty restricted in a care home or hospital because they lack the mental capacity to agree to it themselves. This sits inside the Deprivation of Liberty Safeguards (DoLS), which is part of the Mental Capacity Act 2005. The role is open to several professions, not just social workers, but it does require extra training approved by Social Work England. Main takeaway: you don’t need to be a social worker, but you do need registration, experience and approved training.


Quick Answer to the Best Interest Assessors

Best Interests Assessor is a qualified and registered health or social care professional who carries out specific statutory assessments under the Deprivation of Liberty Safeguards (DoLS), a legal framework under the Mental Capacity Act 2005. Their job is to assess whether it is lawful, necessary, and proportionate to deprive a person of their liberty in a care setting.

Here is the short version of what you need to know:

  1. A BIA holds a specialist statutory role under DoLS, not a generic job title
  2. To become a BIA, you need to be registered in one of four professions: social worker (registered with Social Work England), first level nurse (registered with the Nursing and Midwifery Council), occupational therapist, or psychologist (registered with the Health and Care Professions Council)
  3. You need at least 2 years of post-registration experience in your profession
  4. You must complete an approved BIA training course regulated by Social Work England
  5. Once qualified, you must keep your practice current through ongoing CPD and annual legal updates

At a Glance

QuestionShort Answer
What is a BIA?A professional who carries out statutory assessments under DoLS
Who can become one?Registered social workers, nurses, occupational therapists, or chartered psychologists
Do you need to be a social worker?No
Is specialist training required?Yes, approved by Social Work England
Where do they work?Hospitals, care homes, local authorities, and independent practice
Is DoLS still used in 2026?Yes. LPS has not been brought into force as of 2026

Introduction

If you’ve typed “best interest assessors” into Google, you’re probably trying to figure out one of two things: either you want to become one, or someone just told you a BIA is coming to assess a family member and you have no idea what that means.

I’ve spent a good chunk of my writing career double-checking legal and health guidance before publishing it, and this is one of those topics where getting the details slightly wrong actually matters to real people’s lives. So let’s slow down and go through it properly.

What Is a Best Interests Assessor?

best-interest-assessors-how-it-works-and-how-to-become-one

A Best Interests Assessor (BIA) professional development course provides experienced practitioners with the specialist knowledge and practical skills required to carry out assessments under the Deprivation of Liberty Safeguards (DoLS), a vital framework introduced in 2009 under Schedule A1 of the Mental Capacity Act 2005.

The Mental Capacity Act 2005 is the law in England and Wales that governs decision-making for people who may not be able to make decisions for themselves. DoLS sits within that framework as a specific set of protections for people whose care arrangements may amount to a deprivation of their liberty.

Best interests assessors are the lynchpin on which the entire edifice of DoLS rests, and they have a range of duties that fall to them within the operation of the Safeguards. This is not a supporting role. It is a statutory one with real legal weight.

The Best Interests Assessor undertakes independent Deprivation of Liberty Safeguards assessments on behalf of local authorities to determine whether care arrangements that may amount to a deprivation of liberty are lawful, necessary and proportionate, and in the individual’s best interests.

The role requires the assessor to apply the principles of the Mental Capacity Act 2005 and relevant case law when analysing care arrangements and restrictions placed upon individuals who may lack capacity to consent to their care or treatment.

A BIA acts independently of the care provider. That independence matters. Acting on behalf of local authorities (or Local Health Boards in Wales), BIAs conduct statutory assessments that are central to upholding human rights.


BIA vs Best-Interests Decision-Maker

This is a distinction that causes genuine confusion, so let’s be clear about it.

Best Interests Assessor is a specific, approved professional carrying out a formal statutory assessment under DoLS. Best-interests decision-maker refers to anyone making a decision on behalf of a person who lacks capacity in a particular situation. That might be a doctor, a family member, a care manager, or a legal guardian.

Every BIA assessment involves best-interests reasoning. But not every best-interests decision involves a BIA. The BIA role is defined by DoLS law. The broader concept of best-interests decision-making runs across the whole of the Mental Capacity Act.


Who Can Become a Best Interests Assessor?

The eligible professions are:

  • Social worker registered with Social Work England
  • First level nurse registered in Sub-Part 1 of the Nurses’ Part of the Register maintained under article 5 of the Nursing and Midwifery Order 2001
  • Occupational therapist registered in Part 6 of the register maintained under article 5 of the Health Professions Order 2001
  • Chartered psychologist who is listed in the British Psychological Society’s Register of Chartered Psychologists and who holds a relevant practising certificate issued by that Society

The training to become a BIA is the same regardless of the person’s regulated profession. That consistency is intentional. The skills required cut across all four professional backgrounds.


Do You Have to Be a Social Worker to Become a BIA?

No. Social workers make up a significant portion of the BIA workforce, but the role is open to four registered professions. The BIA course is designed for professionals working in health and social care, including social workers, nurses, occupational therapists, and psychologists.

In practice, many BIAs come from a social work background, which reflects workforce patterns in adult social care. But a registered nurse or occupational therapist with the right experience and training is equally eligible.


What Experience Do You Need?

The BIA role is a specialist role, and the person appointed must be:

  • An approved mental health professional (AMHP)
  • Registered social worker
  • Qualified and registered first level nurse
  • Occupational therapist or chartered psychologist
  • Have had at least 2 years post-qualifying experience
  • Have successfully completed approved Best Interest Assessor training and when completed more than 12 months ago, have undertaken further training relevant to the role within the last year

Beyond the minimum 2-year threshold, the experience that actually matters for this role includes:

  • Working with people who may lack capacity to make decisions
  • Applying the Mental Capacity Act in a practice setting
  • Risk assessment in complex situations
  • Understanding of mental health legislation
  • Human rights awareness
  • Legal literacy, including reading case law and statutory guidance

Experience with conflicting family dynamics, complex care environments, or challenged decisions will serve you well. The role is not just about knowing the law. It is about applying it with judgment.


What Qualifications Do You Need to Become a BIA?

There is a layered answer to this, and it is worth separating the components clearly because they are often muddled together.

  1. Underlying professional qualification in social work, nursing, occupational therapy, or psychology
  2. Current professional registration with the relevant regulatory body (Social Work England, NMC, or HCPC)
  3. At least 2 years of post-registration experience in a relevant health or social care setting
  4. Completion of an approved BIA training course, regulated by Social Work England
  5. Ongoing CPD, including annual legal updates

These are sequential requirements. You cannot start BIA training without the professional qualification and registration already in place.


Professional Registration

To become a BIA, you need to be registered in one of four professions. To ensure consistency of oversight, Social Work England is named in law as the regulator for BIA training.

Each profession has its own regulatory body. Social workers register with Social Work England (or Social Care Wales). Nurses register with the Nursing and Midwifery Council. Occupational therapists and psychologists register with the Health and Care Professions Council. A lapsed or suspended registration disqualifies you from the BIA role.

Social workers who successfully complete the course can annotate their professional registration on the Social Work England register with an SWE BIA Annotation.


BIA Qualification vs BIA Training

This trips people up. “BIA qualification” and “BIA training” are sometimes used interchangeably but they mean different things in context.

BIA training refers to the taught course itself. BIA qualification typically refers to the approved award you receive on successful completion, which makes you eligible to be approved by a supervisory body.

You do not automatically become a practising BIA by finishing the course. You still need to be formally approved through the relevant local authority or supervisory body.

Upon successful completion of the course and formal approval by the Examination Board, you will be eligible for selection by a Supervisory Body to act as a Best Interests Assessor, in line with statutory requirements.


Best Interests Assessor Training

BIA training is a specialist post-qualifying programme. It is not a short awareness session or a half-day online module. It is designed to develop real practice competence across a defined set of capabilities.


What Do You Learn on a BIA Course?

Through workshops, case studies, and practice-based assessments, you will develop and demonstrate the six BIA capabilities, from legal literacy and ethical decision-making to communication and professional judgment.

The curriculum typically covers:

  • The Mental Capacity Act 2005 and its five principles
  • DoLS law, process, and the Code of Practice
  • Relevant case law (including how case law has shaped assessments)
  • The six qualifying assessments under DoLS
  • Best-interests assessment methodology
  • Risk assessment and proportionality
  • Communication with people who have complex needs
  • Report writing and documentation
  • Professional independence and managing conflicts of interest
  • Evidence evaluation and defensible decision-making

The curriculum is fully mapped against the six key capabilities required by Social Work England (2024).


How Long Does BIA Training Take?

Course length varies by provider. Some courses are delivered as a one-week intensive, with some intakes held online only and some face to face.

University-based programmes tend to run across a longer period, often a single academic semester, and may carry Level 7 (Master’s level) credit.

As part of the entry requirements, applicants are expected to arrange two separate shadowing opportunities with a Best Interests Assessor conducting assessments. That observational element sits alongside the taught content and takes additional time to organise.

Realistically, from starting the course to being approved to practise, allow between 3 and 6 months depending on the provider and your own scheduling.


How Do You Choose a BIA Course?

Not all BIA training is equal. Here is what to check before you commit:

FactorWhat to look for
Social Work England approvalConfirm the course is currently approved
Entry requirementsCheck your profession and experience meet the threshold
Assessment methodIncludes written work and practice-based elements
Shadowing requirementsUnderstand what you need to organise yourself
Legal currencyIs case law and guidance up to date?
CPD optionsDoes the provider offer refresher training?
Delivery formatOnline, blended, or face to face. Which suits you?
Provider experienceAre the tutors qualified practitioners?

Teaching should be practice-informed and feature case studies, group work, and guest lectures from experts including legal practitioners.

If a course cannot confirm Social Work England approval, that is a problem. The approval is not optional. It is what makes the qualification count.


What Does a Best Interests Assessor Do?

The Best Interests Assessor has the central role of determining whether a deprivation of liberty is already occurring or is likely to occur.

Their key consideration is whether authorising the deprivation of liberty is necessary to prevent harm to the person, and whether it is proportionate to the likelihood and seriousness of that harm.

The BIA is also responsible for several other assessments within the DoLS process. They are responsible for ascertaining that the person is 18 or older (the age assessment, now generally incorporated as part of the best interests assessment).

They are solely responsible for assessing whether there are any lawful decision-makers who object to what is proposed (the no refusals assessment).

The BIA then produces a written recommendation. That recommendation carries statutory weight and goes to the supervisory body, which in most cases is the local authority.

The supervisory body makes the final authorisation decision based on the BIA’s report and the mental health assessment.


Who Does a BIA Work With?

A BIA assessment is never conducted in isolation. Depending on the case, the BIA will typically work with:

  • The person being assessed (meeting them directly is a requirement, not optional)
  • Family members and informal carers
  • Care home staff or hospital staff
  • The person’s GP or treating clinician
  • An Independent Mental Capacity Advocate (IMCA), where one has been appointed
  • The Relevant Person’s Representative (RPR)
  • The supervisory body
  • Mental health assessors and other professionals involved in the person’s care

The BIA gathers information from all of these sources. They weigh it. They form an independent view. Their report must explain their reasoning, not simply list what they were told.


What Happens During a BIA Assessment?

The role involves undertaking face-to-face assessments, consulting with relevant parties, and producing clear, legally robust reports within statutory timescales.

Here is how a typical BIA assessment works in practice, from referral to recommendation:

  1. Referral received from the managing authority (usually the care home or hospital)
  2. Review existing information: care plans, risk assessments, medical records, previous capacity assessments
  3. Meet the person in their care setting, in a way that supports their participation
  4. Explore the person’s wishes and feelings, past and present, verbally and non-verbally
  5. Consult relevant people: family, carers, advocates, treating professionals
  6. Examine the qualifying criteria: age, mental health, mental capacity, eligibility, no refusals
  7. Identify the restrictions in place: what limits are being placed on the person’s freedom?
  8. Consider alternatives: are there less restrictive ways to meet the person’s needs?
  9. Assess risk: what harm might result from the deprivation of liberty, and what harm might result without it?
  10. Apply the best-interests framework: would a reasonable person, in full knowledge of the circumstances, agree this is in the person’s best interests?
  11. Consider necessary conditions: what conditions, if any, should attach to the authorisation?
  12. Determine duration: what is an appropriate period for the authorisation?
  13. Document your reasoning: the report must explain the decision, not just state it
  14. Consider escalation: if the proposed arrangements cannot be authorised or raise concerns, consider whether the Court of Protection needs to be involved

How Does a BIA Assess Someone’s Best Interests?

Best-interests assessment under the Mental Capacity Act 2005 is governed by Section 4. It is not a checklist to be ticked. It is a framework for structured, evidence-based reasoning.

The BIA must consider:

  • The person’s past and present wishes and feelings
  • Their beliefs and values
  • Any written statements they made when they had capacity
  • The views of people who know them well
  • Relevant circumstances, including their health, care needs, and living situation
  • Whether there are any less restrictive alternatives
  • Whether the proposed arrangements are proportionate to the level of risk involved

Why Do Wishes and Feelings Matter?

Wishes and feelings are not just one consideration among many. They sit at the heart of the best-interests assessment. A person who lacks capacity to make a formal decision still has a right to have their voice heard, and the BIA is there to ensure that happens.

In practice, this means meeting the person face to face, observing how they respond to their environment, listening to what they say even if they cannot communicate conventionally, and taking seriously what their family and carers say about who they are and what they value.

Ignoring or minimising a person’s expressed wishes is one of the most common mistakes in this type of assessment.


What Does “Least Restrictive” Mean?

The least restrictive principle means that any deprivation of liberty must be the minimum necessary to achieve the care aim. It cannot be more restrictive than is needed.

Here is a straightforward example. Imagine someone with dementia who tries to leave their care home repeatedly and is at risk of falls.

A locked front door with no alternative is one option.

But if a staffed garden area and a regular walking schedule could meet the same safety need with fewer restrictions, that alternative should be considered first. The BIA’s job is to ask that question and document the answer.


BIA vs Other Professionals and Roles

RoleMain FunctionHow It Differs from a BIA
Best Interests Assessor (BIA)Statutory DoLS assessmentSpecific function under DoLS law
Social WorkerSocial care assessment and supportBroader professional role, not DoLS-specific
Mental Health AssessorConfirms mental disorder under Mental Health ActDifferent statutory function within DoLS
AMHPMental health legislation functions including detentionDifferent legal role, though AMHPs can also be BIAs
IMCAIndependent mental capacity advocacyRepresents and supports the person’s participation
Care Home ManagerResponsible for care provisionCannot carry out or replace a BIA assessment
Best-Interests Decision-MakerMakes a particular best-interests decisionBroader MCA concept, not the same as the DoLS BIA role

The key roles in the DoLS assessment process include the Mental Health Assessor, the Best Interests Assessor, the Eligibility Assessor, and the Supervisory Body.

The Mental Health Assessor confirms whether the individual has a mental disorder as defined under the Mental Health Act.

This role must be undertaken by a doctor who is either Section 12 approved or a registered medical practitioner with a minimum of three years’ specialist experience in diagnosing and treating mental disorders.


Where Do Best Interests Assessors Work?

BIAs carry out their assessments wherever the person lives or is cared for. In practice, that usually means care homes and hospitals, because those are the settings covered by DoLS.

Common employer types include:

  • Local authority adult social care departments
  • NHS trusts (some commission BIA assessments through employed staff)
  • Specialist DoLS teams within councils
  • Independent and commissioned BIA services

A typical DoLS team may include a service manager, team manager, senior social workers, and multiple full-time equivalent Best Interests Assessors working alongside coordinators.


Can a BIA Work Independently?

Yes, in some arrangements. Some services seek experienced and qualified Best Interests Assessors to join a pool of associate professionals undertaking DoLS assessments on behalf of local authorities.

This is a flexible, sessional opportunity for BIAs who wish to undertake additional independent work alongside their existing roles.

Independent BIA work tends to suit those who are already established in the role and want flexibility. It is not usually the starting point for a newly qualified assessor.


Best Interests Assessor Career Path

The typical path into BIA practice looks like this:

Professional qualification (social work degree, nursing degree, occupational therapy, or psychology) → professional registration → post-registration experience (minimum 2 years) → approved BIA training → formal approval by supervisory body → BIA practice → annual CPD and legal updates → senior practice / specialist roles

BIA work often sits alongside a substantive professional role rather than replacing it. Many BIAs are senior social workers or experienced nurses who carry out assessments as part of a broader role in adult social care.

Others move into specialist DoLS teams where BIA work is the primary focus.

From there, some practitioners move into:

  • Supervision and mentoring of other BIAs
  • Senior practice lead roles in MCA and DoLS
  • Consultancy or independent practice
  • Policy, audit, or service development work
  • Teaching on BIA programmes

No single path is guaranteed. What you do with the qualification depends on your employer, your professional background, and where the workforce needs are in your area.


Best Interests Assessor Salary and Jobs

BIA is not typically a standalone job title in the way “social worker” or “nurse” is. Most BIAs are employed in a broader professional role and carry out DoLS assessments as part of that work.

Salary figures from current job listings give a practical picture:

LocationSalary RangeSource / Date
Staffordshire£45,091 to £49,282 per yearStaffordshire County Council, August 2025
Devon£39,862 to £44,075 per yearDevon Jobs, closing March 2026
London (average)£43,545 to £81,740 per yearGlassdoor, September 2026
Hertfordshire£40,643 to £45,077 plus £3,000 supplementRecruit.net listing

The average salary for a Best Interest Assessor is £46,357 per year in the United Kingdom. That figure reflects a blended picture across employer types and regions. Independent sessional rates differ. Some local authority-commissioned independent BIA roles have advertised at £38 per hour for short-term contracts.

Under the Deprivation of Liberty Safeguards and the forthcoming Liberty Protection Safeguards, BIAs assess whether it is in a person’s best interests to be deprived of their liberty in a care setting.

This is a demanding, specialist role that typically attracts additional allowances.


Skills You Need as a Best Interests Assessor

Good BIA practice is not built on knowledge alone. It depends on how you think, how you communicate, and how you handle pressure.

The skills that actually matter in this role include:

  • Legal reasoning: You need to apply statute, guidance, and case law to real situations, not just recite them
  • Critical analysis: Reading a care plan critically is different from accepting it at face value
  • Communication: Reaching a person who may have dementia, limited speech, or complex communication needs requires real skill
  • Interviewing: Getting meaningful information from family members, carers, and professionals takes structured thinking
  • Evidence evaluation: Knowing the difference between hearsay and reliable evidence matters in a legal process
  • Risk assessment: Effectively assessing risk in complex situations and using analysis to make proportionate decisions is a core BIA capability.
  • Report writing: A poorly written report undermines an otherwise sound assessment
  • Professional independence: You must be able to hold your position when challenged by family members, care providers, or colleagues
  • Conflict management: Disagreements between family members and care providers are common in this work
  • Human rights awareness: Article 5 of the European Convention on Human Rights (the right to liberty) sits directly behind this work

Resilience, the ability to handle emotionally challenging situations and make decisions objectively, and advocacy skills, ensuring the voice of the individual who lacks capacity is heard and considered in the decision-making process, are also central to effective BIA practice.


Challenges Best Interests Assessors Face

Anyone considering this career path should go in with a clear picture of what makes it difficult. This work is rewarding. It is also genuinely hard.

Common challenges include:

  • Conflicting views between family members about what the person would have wanted
  • Families who disagree with the proposed care arrangements, sometimes intensely
  • Incomplete or unreliable evidence from care providers or medical records
  • Organisational pressure to reach a particular conclusion quickly
  • Complex risk, where there is no clearly right answer
  • Difficult conversations with people who are distressed, angry, or grieving
  • Defensible documentation: your written reasoning may be scrutinised by a court
  • Keeping pace with a changing legal framework: case law in this area moves, and what was good practice 3 years ago may have been refined or overturned

Applicants for BIA roles must hold a current DoLS Best Interests Assessor qualification, have recent experience of completing assessments within the last year, and have undertaken annual DoLS/BIA legal update training within the last twelve months.

That annual requirement exists precisely because the law changes. Keeping up is not optional.


Continuing Professional Development for BIAs

BIA qualification is not a one-time event. The role carries ongoing obligations.

Many local authority DoLS teams provide annual DoLS legal update training to their Best Interests Assessors, monthly team meetings, monthly supervision for full-time workers, regular BIA support and CPD sessions, and some administrative support from DoLS coordinators.

Core CPD elements for BIAs include:

  • Annual legal update training (many employers require this as a condition of approval)
  • Supervision, including reflective practice
  • Case law reading and discussion with colleagues
  • Updated guidance from the Social Care Institute for Excellence (SCIE) and the Office of the Public Guardian
  • Refresher training on specific areas such as communication, risk, or report writing
  • Peer discussion with other BIAs

The reflective dimension matters too. BIA work involves making judgment calls in situations where reasonable people might disagree.

Having space to think critically about your own decisions, not just your knowledge, is part of staying good at this job.


DoLS, LPS and the 2026 Legal Position

This is the section that matters most if you are working in or entering this field right now.

What Is the Current DoLS Framework?

The Deprivation of Liberty Safeguards provide a legal framework authorising the deprivation of liberty of a person who lacks capacity to consent to their care arrangements in a hospital or care home.

DoLS was introduced in 2009 and has been operating, with significant pressures and criticisms, ever since.

The existing DoLS regime has been widely criticised as overly complex, bureaucratic, and inefficient. It was recommended in the 2017 Law Commission report that DoLS be replaced as a matter of “pressing urgency.”


What Changed With the 2026 Supreme Court Judgment?

On 2 June 2026, the Supreme Court handed down a judgment by the Attorney General for Northern Ireland, now referenced as the AGNI case.

This judgment had immediate effect on how to establish whether a person may be deprived of their liberty. The previous decision in Cheshire West and the application of the acid test no longer applies. A more complex multi-factorial assessment now applies, which was used before Cheshire West.

This is a significant shift. The Cheshire West “acid test” had been the standard way of determining whether a deprivation of liberty was occurring since 2014. BIAs, supervisory bodies, and care providers need to understand what the AGNI judgment means for how assessments are now conducted.

A person may be able to give valid consent in relation to a deprivation of liberty even if they lack legal capacity to consent to their care and residence under the MCA 2005. This adds nuance that was not present in the earlier Cheshire West approach.

It is estimated that under the proposed definition of valid consent, the number of those considered to require a DoLS authorisation in Northern Ireland would be reduced by 25%. In England and Wales, it is estimated that DoLS applications would be reduced from 350,000 per year to 250,000.


Has LPS Replaced DoLS?

No. Implementation of the Liberty Protection Safeguards has been repeatedly delayed and as of 2026, LPS are not yet in force. DoLS remain the operational regime.

On 18 October 2025, the government announced that it will undertake a consultation on the implementation of the Liberty Protection Safeguards in the first half of 2026.

The LPS was developed as part of the Mental Capacity (Amendment) Act 2019 and was intended to replace the Deprivation of Liberty Safeguards in 2020.

However, their implementation was postponed multiple times and in April 2023, the then Conservative government announced that they would be delayed beyond the life of that Parliament. They have never therefore been brought into force.

It is widely considered that the earliest the LPS could be in force is 2027.

When LPS does eventually come into force, the landscape will shift. The LPS require three assessments (capacity, medical, and necessary and proportionate), with greater scope to reuse existing assessments, compared to the six assessments required under DoLS.

The BIA role as currently defined exists within DoLS. What replaces it under LPS will look different, and practitioners should follow government and Social Work England guidance closely as this develops.


Common Mistakes in Best Interests Assessments

These are recurring problems in BIA practice, not theoretical ones.

  1. Ignoring or minimising the person’s wishes and feelings, treating them as background noise rather than central evidence
  2. Assuming incapacity means exclusion: a person without capacity to make a formal decision can still participate in the process
  3. Failing to consider less restrictive alternatives: accepting the proposed arrangements at face value without asking whether anything less limiting could work
  4. Inadequate consultation: speaking to family briefly and ticking a box is not the same as genuine consultation
  5. Weak or absent evidence base: conclusions that are not supported by documented evidence will not withstand scrutiny
  6. Confusing care planning with BIA assessment: a care plan describes what will happen, a BIA assessment evaluates whether it is lawful and proportionate
  7. Failing to explain proportionality: what harm is being prevented, and does the restriction match the level of risk?
  8. Poor documentation: a good assessment written up badly is still a problem
  9. Ignoring disagreement: if family members or professionals disagree, that disagreement needs to be addressed in the report, not glossed over
  10. Treating proposed restrictions as automatically necessary: just because a care home has put restrictions in place does not mean they are lawful or proportionate

The importance of the BIA role was highlighted in London Borough of Hillingdon v Neary [2011], where the BIA was described as “the cornerstone of protection.” That description carries responsibility. Getting an assessment wrong has real consequences for real people.


Key Takeaways

Let us bring this together clearly.

  • A Best Interests Assessor has a specific, independent role within the DoLS framework, separate from the care team.
  • Becoming a BIA is open to several professions, not just social workers, including nurses, occupational therapists, psychologists and AMHPs.
  • Professional registration and at least two years of relevant experience are expected before you can train.
  • Specialist BIA training, approved by Social Work England, is required on top of your base qualification.
  • Every assessment involves gathering evidence, consulting widely, weighing wishes and feelings, checking risk and proportionality, and considering less restrictive alternatives.
  • BIA work usually sits alongside a wider professional career rather than replacing it.
  • The law here moves; DoLS is still current in 2026, LPS has not replaced it, and the June 2026 Supreme Court judgment changed how deprivation of liberty itself is tested.

If you are a health or social care professional thinking about becoming a best interests assessor, the path is clear: get the experience, complete approved training, and commit to keeping your practice current.

If you are trying to understand the role from the outside, perhaps as a family member involved in a DoLS process, the core thing to know is that a qualified BIA is there to act independently in the interests of the person being assessed, not on behalf of the care provider or any other party.

What questions do you have about the BIA role or the assessment process? Share them in the comments below.

Aboah Okyere
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