How many successors per role?

1–3 typically. One named "ready now" candidate, optionally one "ready in 12 months," and one "ready in 24+ months" for longer development arcs. Roles with zero internal successors go on the risk register.

When should a company start succession planning?

Formally — around 30 employees, when role specialization makes informal handoffs risky. For executive roles, from day one — losing a CFO or CTO without a plan causes serious board-level disruption.

Should successors know they're being developed for a specific role?

Mixed practice. Pros: focuses development, retains the candidate. Cons: creates expectations, demotivates if the role doesn't open. Most companies share that the employee is on a "high-potential" track without naming a specific successor slot.

HR GLOSSARY · People development

Succession planning

Also known as: Leadership pipeline, Talent pipeline

Succession planning is the deliberate process of identifying and developing employees to fill key positions when current incumbents leave. It covers planned departures (retirement, promotion), unplanned departures (sudden resignation, illness), and the development arc needed to make internal candidates ready before the gap opens.

Companies without succession plans treat departures as emergencies — scrambling to fill a role under pressure, defaulting to expensive external hires, accepting capability gaps for 6–18 months. Companies with succession plans treat departures as transitions — internal candidates have been preparing, the development arc is mapped, and the handoff is structured. The difference shows up in continuity, cost, and the company's ability to grow leaders internally rather than perpetually buy them.

What a succession plan typically covers

Critical roles — identified by impact and replaceability, not by org chart level
Successor candidates per role — 1 to 3 named individuals at different readiness levels
Readiness timeline — "ready now," "ready in 12 months," "ready in 24 months"
Development plan per candidate — stretch assignments, formal training, mentoring
Risk register — roles with no internal successor (must hire external or develop fast)
Review cadence — typically annual, with quarterly check-ins on at-risk roles

When succession planning becomes critical

For 5–20 person companies, succession planning is mostly informal — the founder knows who could step up. Above 30 employees, formal succession planning starts paying back: roles are specialized enough that nobody can wing it, and the cost of a wrong external hire (6+ months to productivity, 3–6 months to fire if it fails) exceeds the time invested in development. For executive roles, succession planning is mandatory — losing a CFO or CTO without a successor causes board-level disruption.

Frequently asked questions

What is succession planning?: The deliberate process of identifying and developing employees to fill key positions when current incumbents leave — whether planned (retirement) or unplanned (sudden resignation).
How many successors per role?: 1–3 typically. One named "ready now" candidate, optionally one "ready in 12 months," and one "ready in 24+ months" for longer development arcs. Roles with zero internal successors go on the risk register.
When should a company start succession planning?: Formally — around 30 employees, when role specialization makes informal handoffs risky. For executive roles, from day one — losing a CFO or CTO without a plan causes serious board-level disruption.
Should successors know they're being developed for a specific role?: Mixed practice. Pros: focuses development, retains the candidate. Cons: creates expectations, demotivates if the role doesn't open. Most companies share that the employee is on a "high-potential" track without naming a specific successor slot.