Why Some NED Roles Should Be Time-Limited

By Adrian Lawrence FCA, founder of NED Capital · Part of the Board Governance Hub

It can seem strange to build a planned ending into a role you have just filled well — but for non-executive directors, a defined term is not a lack of confidence in the person; it is a safeguard for the thing that makes the role work at all. This article sets out why that safeguard matters, how the UK governance framework expresses it, and why it is a matter of judgment rather than a blanket rule. It concerns the principle; the practical mechanics of managing turnover are covered in planning for NED rotation without losing continuity, and the individual’s side of a well-timed exit in knowing when it’s time to step down gracefully.

Why Independence and Freshness Fade Over Time

The case for time-limiting a non-executive role rests on a simple, uncomfortable truth: the qualities that make a NED useful are strongest at the start and tend to weaken with time. Independence is the first to go. A non-executive earns their place by being genuinely independent of the executives they oversee — able to ask the awkward question, resist the comfortable consensus, and judge management’s performance dispassionately. But independence is not a permanent state; it is worn down by years of shared history. The longer a non-executive sits alongside the same chief executive, the more the relationship becomes a friendship, the more invested they become in decisions they themselves endorsed, and the harder it becomes to challenge people they have come to like and trust. Freshness fades alongside it. The outside perspective a non-executive brings — the ability to see what those inside the business have stopped noticing — depends precisely on being, to some degree, an outsider. After enough years on a board, a non-executive is no longer an outsider at all: they have absorbed the company’s assumptions, grown accustomed to its ways, and lost the very distance that let them spot what everyone else missed. None of this is a criticism of the individual; it happens to good and conscientious directors as surely as to complacent ones, because it is a function of time rather than character. And that is exactly why it cannot be left to individual judgment to correct — a director rarely notices their own independence eroding, which is why the safeguard has to be built into the structure of the role rather than relied upon from the person in it.

How the Nine-Year Guideline Codifies This

The UK Corporate Governance Code addresses this directly, and it is worth understanding how, because it is often misremembered. The Code includes what is commonly called the nine-year guideline: a non-executive’s length of service is one of the factors that bears on whether they can still be considered independent, and service of more than about nine years from the date of first appointment is likely to compromise that independence. In effect, once a non-executive passes roughly nine years, the board is generally expected to stop regarding them as independent — they may remain a perfectly good director, but no longer an independent one. It is important to be precise about the status of this: the Code operates on a comply-or-explain basis, so the nine-year guideline is a strong expectation that a board must either follow or publicly explain its reasons for departing from — it is not a hard statutory cap that forces a director off the board at a fixed date, and the figure is a guideline rather than a rule written into company law. The practical mechanism through which all this works is the letter of appointment, which sets a defined term — commonly around three years — that is then renewed only by a deliberate decision rather than by default. That structure of defined, renewable terms is what allows a board to refresh itself consciously and to keep its independence genuine, rather than letting tenure drift on unexamined until a director has quietly become an insider. The framework, in other words, does not distrust long-serving directors; it simply recognises that independence has a natural half-life and builds in a checkpoint before it expires. How this fits the wider governance framework is set out in how the UK Corporate Governance Code impacts non-executive directors, and the independence criteria themselves in independent versus affiliated non-executive directors.

Time-Limited, Not One-Size-Fits-All

The title says some roles, and the qualification is deliberate, because time-limiting is a safeguard to be applied with judgment, not a blanket rule to be imposed mechanically. Continuity has real value: a board that changed its entire non-executive complement every few years would lose the institutional knowledge, the hard-won understanding of the business, and the steady relationships that make a board effective, and there are moments — midway through a turnaround, during a crisis, ahead of a major transaction — when losing an experienced non-executive to an arbitrary time limit would do real harm. The nine-year guideline itself is built for exactly this balance: it is comply-or-explain precisely so that a board can retain a valued director beyond the usual point where doing so is genuinely in the company’s interest, provided it is honest about the loss of independence and explains its reasoning. So the mature position is not “every NED must go after a fixed period” but rather that boards should treat non-executive tenure as something to be actively managed — expecting independence to fade, planning refreshment before it becomes a problem, and being willing to make the deliberate exception where continuity clearly outweighs renewal. Handled well, this keeps a board both fresh and stable: independent challenge is renewed before it dulls, while continuity is preserved where it genuinely matters. The cost of getting the balance wrong in the other direction — letting boards ossify by never refreshing — is set out in the cost of waiting too long to refresh your board. Getting this balance right is one of the quieter arts of good governance, and one where an experienced view helps. At NED Capital we advise boards on tenure, refreshment and succession, and help them find the non-executives who keep independent challenge alive. Every search is led personally by Adrian Lawrence FCA, a Fellow of the ICAEW and former listed-company finance director.

This article is general information about board tenure and the UK Corporate Governance Code, not legal or governance advice. The Code applies in full to premium-listed companies and on a comply-or-explain basis; other companies are not bound by it. Boards should take their own professional advice on their specific obligations.

NED Capital | Sister practice of FD Capital | ICAEW practising certificate held by Adrian Lawrence FCA.

Adrian Lawrence

Adrian Lawrence FCA is the founder of NED Capital and a Fellow of the Institute of Chartered Accountants in England and Wales (ICAEW) and holds an ICAEW practising certificate in his own name. He holds a BSc from Queen Mary College, University of London, and has over 25 years of experience working with boards, investors and business owners across the UK. He founded NED Capital to connect businesses with the independent Non-Executive Directors they need to provide challenge, governance and strategic oversight — and personally leads candidate assessments for board-level appointments.