Before performance ratings get delivered, every manager's draft ratings go into a room called "calibration" — a meeting where managers across a department compare notes and adjust scores before anything reaches an employee. We'd like to explain, honestly, what happens in that room, because it routinely changes outcomes in ways the employee never sees and the manager rarely fully explains afterward.
What calibration is supposed to do
Correct for one manager being a harsh grader and another being a generous one, so that two equally strong performers on different teams don't end up with wildly different ratings purely because of who happened to manage them. This is a real, legitimate problem, and calibration is a reasonable attempt to solve it.
What calibration actually does most of the time
Redistributes ratings to fit a shape leadership already expects — often an implicit or explicit curve, where only so many people can get the top rating and a certain number need to land in the middle or below, regardless of whether that distribution reflects the actual work. A team that had a genuinely exceptional year, performing well above a comparison team, can still get rationed down to fit the curve, because the curve was the actual constraint the meeting was managing against, not a pure assessment of merit.
The horse-trading
"I'll move mine down if you move yours up" is a sentence that gets said, quietly, in almost every calibration session that's ever run long. Managers negotiate across their own teams' ratings the way diplomats negotiate border disputes — not because either manager has new information about either employee's actual performance, but because the room has a fixed number of top ratings to hand out and somebody's rating has to absorb the shortfall.
Why your manager's draft and your final rating differ
Your manager walks into calibration with an honest assessment, formed over a year of actually working with you. They walk out with whatever survived the room — sometimes unchanged, sometimes quietly downgraded to fit the curve, sometimes upgraded because another manager's case for their own report was weaker than yours. The rating you receive is the output of a negotiation you were never in the room for, conducted by someone who, in the best case, fought for you, and in the worst case, traded you to protect someone else.
What your manager tells you afterward
Rarely the full story. "The team had a strong year, and ratings are always competitive" is as much as most managers will say, because explaining the actual mechanics — "you were downgraded because another manager pushed harder for their report, and the meeting has a quota" — would damage trust in a system the manager has to keep using every cycle, and would also expose process the manager themselves may not be allowed to disclose.
Why companies use this format anyway
Because an uncalibrated system, where each manager grades independently with no cross-check, produces real, documented unfairness too — grade inflation on generous teams, unfair harshness on strict ones, and a general sense that your rating is more about your manager's personality than your actual work. Calibration is a genuine attempt to fix a real problem. It just introduces a different one: a hidden, unaccountable layer of adjustment that nobody outside the room can see or appeal.
What we're not saying
We're not saying calibration is dishonest by design — most companies running it are trying, in good faith, to make ratings fairer across the org, and some calibration sessions genuinely do correct real grading inconsistency without rationing anyone unfairly. We're saying the process is opaque by construction, and an employee has essentially no way to know whether their final rating reflects their manager's honest read, a curve-driven downgrade, or a trade made on their behalf in a room they'll never see the inside of.
Our recommendation
If you manage people: tell your reports, in general terms, that calibration exists and can move ratings — don't let them think the number they received was your unfiltered opinion if it wasn't. If you're being rated: ask your manager directly whether your rating changed in calibration and why, even knowing the honest answer might be incomplete.
If your last rating changed between your manager's draft and what you actually received, email us at contact@b2bsaas.guru. We'll help you ask the right question. We can't promise you'll get the full answer.