What Actuarial Consulting Firms Actually Do
Actuarial consultancies sell advice, not insurance. Where an in-house actuary at an insurer or pension scheme works for a single employer with a single balance sheet, a consulting actuary serves dozens of clients - pension trustees, insurers, corporates, and increasingly, general businesses managing financial risk - each with their own liabilities, funding position, and regulatory pressures. The work spans pension scheme valuations, insurance reserving and pricing reviews, mergers and acquisitions due diligence, and increasingly, climate and longevity risk modelling, much of it grounded in the same risk management principles used across quantitative finance more broadly.
This guide compares the major actuarial consulting firms operating in the UK and globally in 2026, how their hiring and graduate schemes work, how pay compares to in-house insurance roles, and which type of firm and role suits which kind of person. If you are still deciding whether to pursue the qualification at all, our guides on how to become an actuary and actuary vs quant cover the route and the alternative in more depth.
The Major Actuarial Consulting Firms
Milliman
Milliman is one of the largest independent actuarial consultancies globally, with a strong life insurance and healthcare practice alongside pensions and property/casualty work. Independence (it is not part of a broader professional services group) is part of its pitch to clients who want advice free of audit-related conflicts. Milliman has a substantial London presence and a genuinely global reach, making it a common choice for actuaries who want international mobility without moving to a Big Four-style generalist firm.
WTW (Willis Towers Watson)
WTW runs one of the largest pensions and insurance consulting practices in the world, alongside a significant broking and risk advisory business. Its actuarial graduate scheme is one of the most structured in the UK market, with clear rotational exposure across pensions, insurance, and investment consulting in the early years. Scale is the main selling point: WTW's breadth means an actuary can move between specialisms internally without changing employer.
Aon
Aon's actuarial practice sits within a much larger risk, retirement and health advisory business, giving it significant scale in pensions de-risking (buy-ins, buyouts, longevity swaps) - an area of UK pensions consulting that has grown substantially as defined benefit schemes mature and look to transfer risk to insurers. Aon is also a major player in reinsurance broking, which creates crossover opportunities for actuaries interested in the insurance side of the business.
Mercer
Mercer, part of the Marsh McLennan group, has one of the broadest human capital and pensions consulting practices globally, with actuarial work sitting alongside investment consulting, benefits, and wealth management advice. This breadth suits actuaries who want their technical work connected to wider corporate advisory conversations rather than purely calculation-focused output.
Hymans Robertson
Hymans Robertson is a UK-headquartered, employee-owned firm with a strong reputation in local government pension schemes (LGPS) and defined benefit pensions consulting more broadly. Its independent, partner-owned structure is a genuine differentiator: profit-sharing and career progression are governed by the partnership rather than a listed parent company, which appeals to actuaries who want a flatter, more UK-centric career path.
LCP (Lane Clark & Peacock)
LCP is another UK-founded, partnership-structured firm with a strong pensions practice and a growing insurance and financial technology arm. It has built a reputation for technically strong, research-driven output, including publishing widely read industry surveys and commentary. LCP's smaller scale relative to the global giants tends to mean earlier client-facing responsibility for junior actuaries.
Gallagher
Gallagher's actuarial and consulting arm has expanded significantly through acquisition over the past decade, absorbing a number of smaller UK actuarial and benefits consultancies. It now offers meaningful scale in pensions and insurance consulting, though its actuarial brand identity is less established than the older specialist firms above, since much of its recent growth has been inorganic.
Barnett Waddingham
Barnett Waddingham is a mid-sized, employee-owned UK consultancy with a strong reputation in pensions, insurance, and a growing wealth and investment advisory business. Like Hymans and LCP, its independent structure and UK focus appeal to actuaries who prioritise culture and ownership stake over the scale of a multinational parent.
The Big Four's Actuarial Practices
Deloitte, PwC, EY and KPMG all run actuarial practices, typically embedded within their broader risk advisory or financial services consulting arms rather than standing alone as pure actuarial firms. These practices tend to attract candidates who want optionality: the actuarial qualification alongside exposure to broader transaction advisory, audit-adjacent, or general risk consulting work, with an easier internal path to move into non-actuarial consulting later if interests shift.
How Hiring Works at Consulting Firms
Actuarial consultancies hire graduates almost exclusively into structured trainee schemes, distinct from the direct-entry pattern common in quant trading recruitment. Expect a numerical reasoning test, a situational judgement or competency-based assessment, and one or two interview rounds focused on communication skills as much as mathematical ability - client-facing consulting work rewards people who can explain a funding deficit to a pension trustee board, not just calculate one.
A 2:1 or above in a numerate degree (mathematics, actuarial science, statistics, economics, physics, engineering) is the typical minimum requirement, though a specific actuarial science degree is not required and, at some firms, not even particularly advantaged over a strong maths or physics background. Firms fund IFoA exam attempts and give paid study leave, generally a similar package across the major consultancies, so exam support is rarely the differentiator between offers.
The more meaningful differentiator between firms is specialism exposure. Larger firms (WTW, Aon, Mercer) rotate graduates across pensions, insurance and sometimes investment consulting before graduates settle into a specialism. Smaller, UK-focused partnerships (Hymans, LCP, Barnett Waddingham) tend to place graduates into a specific team earlier, which suits candidates who already know they want pensions over insurance, or vice versa. Our actuarial graduate schemes UK guide walks through the application timeline and assessment centres in detail.
Consulting Pay vs In-House Insurance Pay
Consulting and in-house insurance actuarial roles pay similarly at the graduate and early-qualified stages, but the shape of the career and the ceiling differ.
| Career Stage | Consulting (UK, estimate) | In-House Insurer (UK, estimate) |
|---|---|---|
| Graduate trainee | £30,000 - £40,000 | £32,000 - £42,000 |
| Part-qualified (2-4 yrs) | £42,000 - £58,000 | £45,000 - £62,000 |
| Newly qualified | £60,000 - £80,000 | £65,000 - £88,000 |
| Senior consultant / manager | £85,000 - £120,000 | £90,000 - £125,000 |
| Partner / Director | £150,000 - £400,000+ | £130,000 - £220,000 |
In-house roles at insurers often edge ahead slightly at the newly qualified stage, since insurers compete directly with banks and asset managers for the same talent pool. Consulting overtakes at the senior end, because partnership economics (a genuine equity share of firm profits, most pronounced at employee-owned firms like Hymans Robertson and LCP) create a materially higher ceiling than an in-house senior actuary's salary and bonus structure typically allows. Our actuary salary guide breaks the full trainee-to-fellow trajectory down by level, and for a comparison against quantitative finance pay, see our actuary vs quant guide.
Consulting vs In-House: Who Fits Which
Consulting suits people who like variety and client interaction. You will work across multiple clients simultaneously, present findings to trustee boards and finance directors, and see a wider range of problems than an in-house actuary tied to one employer's book of business. The trade-off is billability pressure: consultants track chargeable hours, and utilisation targets create a different kind of stress to the exam grind, one that continues well past qualification.
In-house roles suit people who prefer depth over breadth. You own one employer's actuarial function, understand its book of business intimately over years, and are typically insulated from the client-winning and billing pressure that shapes a consultant's day. Progression tends to be more linear: chief actuary or head of actuarial function is a well-defined ceiling, whereas consulting partnership is both a higher ceiling and a genuinely harder track to make.
Neither path is a permanent choice. Movement between consulting and in-house roles happens throughout an actuarial career in both directions, and firms generally view a mixed background (a few years each way) as a genuine asset rather than a mark against a candidate, unlike some quantitative finance careers where switching path early is read more critically. Actuaries considering a move toward the more technical end of financial risk work may find our quantitative analyst career guide useful for mapping out what that transition actually involves.
Where This Comparison Wobbles
Firm cultures and specialisms shift with mergers and acquisitions, and several of the firms above have both acquired and been acquired within the past decade - Gallagher in particular has grown substantially through acquisition, and further consolidation across the mid-tier consulting market is plausible. Pay figures are estimates drawn from public surveys, job postings and recruiter commentary rather than confirmed employer data, and partnership-level consulting pay in particular varies enormously based on client base and individual performance in ways a table cannot capture. Regulatory change, particularly ongoing reform of UK pensions and Solvency UK capital rules, will continue to reshape which specialisms grow fastest within these firms.
Frequently Asked Questions
What is the biggest actuarial consulting firm?
By global scale, WTW, Aon and Mercer are typically considered the largest, each embedding a substantial actuarial practice within a much broader risk, benefits and insurance advisory business. Among UK-focused independent partnerships, Hymans Robertson and LCP are the most established names in pensions consulting specifically.
Do actuarial consulting firms pay more than insurers?
Pay is broadly similar early in a career, with in-house insurer roles sometimes edging slightly ahead at the newly qualified stage. Consulting tends to overtake at the senior end because partnership structures at firms like Hymans Robertson and LCP offer a genuine profit share, creating a higher ceiling than most in-house senior actuary packages.
Is it easier to get into consulting or an insurer as a graduate actuary?
Difficulty is broadly comparable, since most major consultancies and insurers use similar assessment processes (numerical reasoning tests, competency interviews) and target the same pool of numerate graduates. Consulting firms tend to place slightly more weight on communication and client-facing potential during interviews, given the nature of advisory work.
Which actuarial consulting firm has the best graduate scheme?
There is no single best answer since it depends on what a candidate wants. WTW, Aon and Mercer offer the broadest early rotation across specialisms due to their scale. Hymans Robertson, LCP and Barnett Waddingham offer earlier specialisation and a more UK-centric, partnership-track career for candidates who already know they want to focus on pensions or insurance consulting.
Can I switch from a Big Four actuarial practice to a specialist consultancy?
Yes, this move happens regularly in both directions. Actuaries commonly move from a Big Four practice into a specialist pensions or insurance consultancy (or vice versa) once qualified, and firms generally view this kind of lateral experience positively rather than as a mark against a CV.
Do actuarial consulting firms hire people without an actuarial science degree?
Yes, and it is common. Most consultancies hire from any numerate degree background (mathematics, physics, economics, engineering, statistics) and provide the actuarial-specific training and IFoA exam support in-house. A dedicated actuarial science degree can help with the earliest exams but is rarely a hiring requirement.
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