Two managers. Same rating scale. Same company. Yet somehow an "Exceeds Expectations" in one team means something entirely different in another. When performance cycles end without anyone checking, you get inconsistency that is impossible to explain to the people who deserve honest answers. Calibration meetings exist to fix that - but only if you know how to run them well.
Calibration is not about changing ratings for the sake of it. It is about making sure the same bar is being applied to every person, every cycle, across every team.
What a calibration meeting actually is
A calibration meeting is a structured conversation between managers, usually held after initial performance ratings have been set but before they are communicated to the team. Each manager presents their ratings and rationale. The group asks questions, flags anomalies, and where there is a genuine discrepancy, discusses it until the ratings align.
The goal is not to challenge every rating or second-guess every manager. It is to check that you are all applying the same criteria and holding the same standard. This matters most at promotion and pay-band thresholds. When one manager gives "Exceeds" freely and another reserves it for exceptional performance, people in the second team are disadvantaged through no fault of their own. Calibration is how you prevent that.
Without calibration
Inconsistent. Unfair. Hard to defend.
With calibration
Consistent. Fair. Defensible.
Calibration typically happens once or twice a year as part of a formal performance review cycle. In some organisations it is facilitated by HR; in others it is peer-led between managers at the same level. Either way, the mechanics are the same.
How to prepare for calibration
Calibration sessions reward preparation. Walk in without it and you will spend the meeting scrambling for examples while others have already moved on. Preparation also protects your team. If you cannot defend a rating clearly, it will shift - not because it was wrong, but because you could not make the case.
Before you walk in
Bring evidence, not impressions. "She has been performing really well" is not evidence. "She delivered three projects on time this quarter, received consistent positive feedback from stakeholders, and stepped in to unblock the team when a dependency slipped" is. The difference is the difference between a rating that holds and one that gets revised in the room.
- One-sentence rationaleFor each person, write one sentence explaining the rating. If you cannot articulate it, your case is weaker than you think. This also forces you to separate ratings from personal feelings.
- Relative rankingCalibration involves comparing people, not just rating them individually. Know where each person sits relative to their peers on your team. If you have two people at the same rating but one is clearly stronger, be ready to say so.
- Re-read the criteriaThe differences between adjacent ratings are where most disagreements happen. Before the session, re-read the definitions for each level, especially around the ratings you are using most.
How to run the session well
A calibration session needs a facilitator, usually a senior manager or HR business partner. Without one, the loudest voice in the room wins. That is not calibration - it is negotiation, and it produces ratings that reflect who argued best rather than who performed best.
Calibration grid: performance vs potential
High potential, developing performance
Invest in coaching and stretch assignments
High potential, high performance
Prioritise for promotion and retention
Lower potential, developing performance
Clarify expectations and provide support
Lower potential, high performance
Recognise contribution and sustain engagement
If your entire team sits top-right, that is a conversation to have.
Work through one person at a time. The presenting manager shares the rating and a brief rationale. Others ask clarifying questions. The group agrees or surfaces a discrepancy, then discusses until alignment is reached. Move on. Keep the pace steady - a full team calibration should rarely take more than an hour.
- Grade inflationThe manager who rates everyone highly to avoid difficult conversations. The fix is to ask for specific evidence. If someone is rated "Exceeds", what exactly did they exceed? What would "Meets" have looked like?
- Grade deflationThe manager who holds the bar unrealistically high. Ask what would actually justify a higher rating. If the answer describes a superhero, the criteria may need revisiting, not the person.
- Halo effectsRating someone highly across all dimensions because of one visible success. Separate the dimensions: delivery, collaboration, growth, and impact are different things. Strong on one does not mean strong on all.
- Recency biasRatings dominated by what happened last month rather than the full review period. Ask: what about the first six months? How consistent was this performance over the whole cycle?
What to do after calibration
A calibration session is only useful if something changes as a result of it. That might mean updating a rating, refining how you articulate your reasoning, or rethinking how you set expectations ahead of the next cycle. All of that is useful work. The worst outcome is walking out and doing nothing with what you heard.
After the session
If ratings shifted during calibration, update them before communicating. Do not tell your team member they were rated one way if the calibrated outcome is different. The number that reaches them should be the one the group agreed on.
If you disagreed with an outcome but it was calibrated down, that is worth sitting with. Were you holding a higher standard than your peers, or a lower one? Either way, that is useful signal for how you set expectations in the next cycle. Using data to make reviews fair starts well before calibration - with notes, evidence, and patterns captured throughout the year.
After calibration, every person on your team should have a clear development target connected to what you discussed. That makes the next calibration easier, because progress is visible and documented rather than reconstructed from memory. Explore Targets in Manager Toolkit for a straightforward way to track development goals across your team all year round.
Frequently asked questions
Make performance reviews fair
Track development targets and capture evidence all year so calibration is never a scramble.