Succession planning: a step-by-step guide

Succession planning protects an organisation when key people leave, retire, or move into new roles. This guide sets out a practical, step-by-step process HR leaders can use to identify critical roles, develop successors, and keep the business running through change.

Succession planning is the process of identifying business-critical roles and preparing the people who could step into them in future. It readies an organisation for both planned moves, such as retirement or promotion, and sudden gaps, such as resignation or illness.

The CIPD succession planning factsheet describes it as identifying and growing talent to fill leadership and business-critical positions over time. A plan usually covers senior leadership, specialist technical roles, and any position where a vacancy would stall operations.

Modern succession planning differs from the fixed charts of the past. It now centres on developing people for future roles, not simply recording who currently sits where on the organisation chart. Succession planning sits alongside workforce planning and career path frameworks, and it is most effective when it feeds directly into how you develop and promote staff, so you are genuinely preparing the people you identify for what comes next. Succession planning applies at any size, from a small senior team to a large organisation with many business-critical roles.

Succession planning matters because unplanned departures create operational risk. When a senior leader or specialist leaves without a ready replacement, projects stall, decisions slow, and specialist experience leaves with them. A plan keeps business-critical roles covered and removes single points of failure.

Most UK organisations remain exposed. According to research reported by People Management, only 14% of UK organisations have a succession plan in place, and 39% have no plan at all. That gap leaves leadership transitions to chance at the exact moment continuity matters most.

Strong succession planning protects continuity in three practical ways. It shortens the time a critical role sits empty, because a developed successor can step up quickly. It retains institutional knowledge, since expertise transfers before someone leaves instead of after. And it steadies stakeholders, customers, and teams during change, because the organisation can show a clear plan for who leads next. That reassurance often matters as much as the operational cover itself, since confidence in leadership continuity shapes investment, retention, and morale.

An effective succession plan follows a repeatable process: identify business-critical roles, define what each role needs, assess potential successors, close capability gaps through development, and review the plan regularly. The steps below turn succession planning from an annual document into an active part of how you manage talent.

1. Identify business-critical roles. List the roles that would cause the most disruption if they became vacant. These are usually senior leadership, revenue-critical positions, and specialist roles with scarce skills. Rank them by impact and by how hard each would be to fill externally.
2. Define what each role requires. Set out the skills, experience, and behaviours each critical role needs, not the traits of the current holder. This keeps the plan focused on future demands instead of replicating the past.
3. Assess potential successors. Map current employees against each role. Identify who is ready now, who could be ready in one to two years, and where you have no internal option. A skills matrix makes these gaps visible.
4. Develop successors deliberately. Close the gaps you find through stretch assignments, mentoring, and leadership development programmes. Tie each person’s development to the specific role you are preparing them for.
5. Document and communicate the plan. Record who covers which role, at what readiness level, and what development is under way. Share enough with managers to act, while handling sensitive information carefully.
6. Review the plan on a set cycle. Revisit it quarterly, not once a year. Roles, people, and priorities change, and a plan that no one reviews becomes inaccurate quickly.

Effective managerial succession planning builds a pipeline, not a single named replacement. The strongest approaches develop several people for a band of roles, tie development to real business projects, and involve managers directly in spotting and coaching future leaders.

• Build pools, not single heirs. Prepare several people for groups of similar management roles, so one departure does not derail the plan.
• Involve line managers in identifying talent. Managers see day-to-day performance and potential, so training managers to coach strengthens the pipeline at source.
• Tie development to live work. Give future managers stretch assignments and real projects with measurable outcomes, instead of classroom exercises alone.
• Assess objectively. Use consistent criteria and, where useful, structured assessment, so readiness decisions rest on evidence and not personal impression.
• Plan for interim cover. Decide who steps in temporarily if a role opens before a successor is ready, so operations continue without a scramble.
• Prioritise internal mobility. A visible succession plan signals to ambitious employees that they can progress, which improves retention.

A succession plan should cover any role where a sudden vacancy would disrupt operations, revenue, or leadership. This usually means senior executives, people managers, and specialists with rare or hard-to-replace skills. It should not try to cover every role, which would dilute focus and waste effort.

Focus your plan on three groups:

• Senior leadership. C-suite and director roles where a gap affects strategy and external confidence.
• People managers. Team and department leads whose absence stalls delivery and staff development.
• Business-critical specialists. Technical or knowledge-heavy roles where few people hold the skill, inside or outside the organisation.

Avoid over-extending the plan. Covering junior or easily replaced roles adds administration without reducing real risk. A practical test is to ask whether a three-month vacancy in a role would materially harm the organisation. If the answer is no, that role belongs in general workforce planning and not the succession plan.

The most common succession planning mistakes are naming a single successor per role, judging readiness on current performance alone, and building a plan that no one develops or sees. Each of these leaves an organisation exposed when a senior role actually opens.

• Naming a single successor per role. If that person leaves or declines, the plan collapses and the organisation fills a senior role under pressure. Identify more than one option so a single departure does not undo your planning.
• Forgetting the knock-on vacancy. Promoting a successor opens their previous role, so a plan that stops at one level simply moves the gap down the organisation. Map the follow-on moves each promotion triggers.
• Confusing performance with potential. A strong performer in the current role is not automatically ready to lead. Assess people against future role requirements.
• Building a list without development. Identifying successors but never developing them creates a list, not a plan. Attach specific development to each name.
• Keeping the plan hidden from managers. Managers develop the people on the plan day to day, so shutting them out stalls the very development the plan depends on. Share readiness levels and development plans with the managers who need them.

Replacement planning names a stand-in to cover a role temporarily if it becomes vacant. Succession planning goes further by developing people over time so they are genuinely ready to take on the role, not simply hold it.

Start before you need it, as soon as you can identify roles that would disrupt the organisation if they became vacant. Waiting until a senior person announces their departure leaves too little time to develop a ready successor.

HR usually owns the process, while senior leaders and line managers hold shared responsibility. Managers identify and develop talent day to day, and executives approve priorities and back the development that successors need.

Most successors need one to three years of focused development to become ready for a senior role, depending on the gap between their current skills and the role’s demands. Structured coaching and stretch assignments shorten this considerably.