Probate Valuer Qualifications: NAJ, IRV, RICS, Gem-A Explained

HMRC does not publish a list of approved valuers or mandate a specific qualification. The Inheritance Tax Manual states only that valuations must reflect Open Market Value as defined by section 160 IHTA 1984, and that HMRC "will usually be able to accept" valuations prepared by professionals on the correct basis.

In practice, this means HMRC accepts valuations from individuals with demonstrable expertise in the relevant asset type. The acid test is whether the valuer can produce a defensible report supported by appropriate market evidence and is willing to stand behind it under enquiry. The recognised professional bodies — NAJ, IRV, RICS, Gem-A, SOFAA — exist precisely to provide that defensibility.

Choosing an unqualified valuer (a friend who once worked in retail jewellery, a local antique dealer with no formal credentials, an online valuation service) creates two risks. First, HMRC may reject the valuation outright, requiring the executor to commission a second one from a qualified professional. Second, if HMRC accepts the figures and later challenges them, the executor has no defensible report to point to, and may be personally liable for any shortfall.

Different asset types require different specialist knowledge. Jewellery and gemstones, art and antiques, classic cars, and property each have their own established professional bodies. The five most relevant for probate are summarised below, with detail on each in the sections that follow.

The National Association of Jewellers (NAJ) is the UK's trade association for the whole jewellery sector. With over 1,700 members and 156 years of history, it represents retailers, manufacturers, suppliers, designers, and valuers, all of whom must follow a Code of Conduct based on "honesty, integrity and professionalism".

Within the NAJ, the Institute of Registered Valuers (IRV) is the specialist body for valuers of jewellery, watches, and silverware. Founded in 1987, the IRV has been the recognised UK authority for jewellery appraisal for nearly four decades. Entry to its Member and Fellow categories is strict: candidates must hold qualifications in valuation, gemmology, and diamond grading, and have at least five years' experience in the jewellery industry.

The first step toward IRV membership is the ATHE Level 3 JET Certificate in the Foundations of Appraisal Practice (FoAP), which is a prerequisite for full membership. All IRV Members and Fellows must commit to the IRV Code of Practice, undertake Continuing Professional Development, and pass a Professional Review every five years.

For probate purposes, IRV members are the gold standard for jewellery, luxury watches, and silverware. HMRC accepts IRV reports as a matter of course, and the IRV directory at naj.co.uk allows executors to find a registered valuer in their area.

The Royal Institution of Chartered Surveyors (RICS) is the global professional body for property and the built environment, with over 130,000 members and candidates across more than 140 countries. RICS sets qualifications, regulates members, and publishes the RICS Valuation — Global Standards (commonly known as the Red Book), which is the authoritative standard for valuations submitted to HMRC and other regulators.

RICS membership operates at three levels. AssocRICS is the entry-level associate qualification. MRICS (Member of the Royal Institution of Chartered Surveyors) is the standard professional grade, achieved by candidates who pass the Assessment of Professional Competence. FRICS (Fellow) is the senior grade, recognising substantial experience and contribution to the profession.

RICS regulates valuers across multiple specialisms. For probate, the most relevant are residential property surveyors (for valuing the deceased's home), commercial property valuers (for buy-to-let portfolios, business premises, and land), and Fine Art and Chattels valuers (a distinct specialism within RICS covering paintings, antiques, classic cars, and decorative arts).

A RICS Red Book valuation report is the highest standard of property valuation defensibility. The Valuation Office Agency, which reviews property valuations submitted on the IHT400, treats RICS Red Book reports as the benchmark.

The Gemmological Association of Great Britain (Gem-A), founded in 1908, is the world's longest-established provider of gemmology education. Based at Ely Place in central London, it operates in over 26 countries with more than 40 teaching centres worldwide and publishes The Journal of Gemmology and Gems & Jewellery.

Gem-A awards two principal credentials. The Gemmology Diploma (post-nominal FGA — Fellow of the Gemmological Association) is the comprehensive qualification covering identification, grading, and valuation principles for all gem materials. The Diamond Diploma (post-nominal DGA — Diamond Member of the Gemmological Association) is the specialist qualification in diamond grading.

For probate purposes, FGA and DGA credentials are essential where the estate contains significant gemstone jewellery — particularly coloured stones (rubies, emeralds, sapphires) where authentication and treatment detection materially affect value. A diamond ring valued without proper grading may be off by a factor of two or three.

Many practising probate jewellery valuers hold both NAJ/IRV membership and Gem-A qualifications, which is the strongest combination for fine jewellery work.

The Society of Fine Art Auctioneers and Valuers (SOFAA), established in 1976, is the UK's sole professional organisation dedicated to fine art auctioneers and valuers. Membership comprises leading firms across London and the regions, specialising in the valuation and auction of antiques, fine art, jewellery, and other chattels.

SOFAA is not a regulatory body in the strict sense — it does not issue post-nominals to individual valuers — but membership signals that a firm meets the society's standards on best practice, money laundering compliance, and professional conduct. Many SOFAA member firms also hold RICS Fine Art and Chattels accreditations at the individual valuer level.

For probate purposes, SOFAA member firms are particularly useful where the estate contains a wide range of categories (paintings, furniture, ceramics, silver, jewellery, books) that benefit from a single integrated assessment by an auctioneer with cross-category expertise. Major regional auction houses such as Bonhams, Christie's, Dreweatts, Lyon & Turnbull, Tennants, and Woolley & Wallis are among the SOFAA membership.

A qualification by itself is not enough. The other essential safeguard for executors is professional indemnity insurance — a policy that covers the valuer if their valuation is later proven negligent or significantly incorrect.

All members of the NAJ/IRV, RICS, and most SOFAA firms are required to carry professional indemnity insurance as a condition of membership. The insurance protects the valuer, but it also indirectly protects the executor: if HMRC successfully challenges a valuation, the executor can recover any shortfall from the insurer rather than out of their own pocket.

Unqualified valuers — including high-street jewellers offering insurance valuations as a sideline, online valuation services, and self-employed individuals without a professional body — typically have no professional indemnity cover. The executor in this scenario carries the entire risk personally.

Always ask a prospective valuer for their professional body membership number AND confirm they hold current professional indemnity insurance. Both are reasonable, standard questions, and any genuine professional will answer them without hesitation.

The five recognised bodies all maintain public directories of their members. Verifying a valuer takes five minutes and is the single most effective protection an executor can put in place.

A common executor mistake is assuming that any local jeweller can provide a valid probate valuation. They cannot — at least, not unless they hold the appropriate qualifications.

Most high-street jewellers offer "insurance valuations" as a service, but these are designed for retail replacement value (what a customer would pay to buy an equivalent new item) rather than Open Market Value. Using an insurance valuation for probate typically overstates the estate by 200-300% and results in significant overpayment of Inheritance Tax.

The correct question to ask any jeweller is: "Are you an Institute of Registered Valuers member, and can you provide a probate valuation on Open Market Value basis with professional indemnity cover?" If the answer is no to any part, the executor should engage a qualified probate valuer instead.