The 9 box is a grid: performance on one axis, potential on the other, three levels each, nine cells. Every employee is placed in one cell after the review, and the team is looked at as a whole. It was built for talent reviews in large companies, and it survives at small scale because it does one thing the review form cannot: it puts everyone's rating on one page so the managers who gave them can see the distribution together. This page explains what a 9 box assessment plots and where the two axes come from, how a 9 box performance review is used to calibrate ratings across a team, and where a company of ten to two hundred should stop, because the grid is also the fastest way to turn an appraisal into a label.
The two axes and where they come from
Performance is the appraisal rating for the period, against the objectives, on the company's scale collapsed to three levels: below, meets, exceeds. It is evidence-based and it is the manager's judgement, already written and commented on. Potential is a judgement about the next role, not the current one: could this person do a bigger job within a period or two. It is softer, it is the part people argue about, and in a small company it is usually the founder's or the manager's honest guess. A 9 block assessment that treats potential as a second performance rating has lost the point of the second axis.
Calibration: the grid's real job at small scale
Put every employee's cell on one page and the pattern by manager appears at once: one team entirely in the top row, another with nobody above the middle. That is the calibration conversation, and the grid started it without anyone accusing anyone. Managers explain their placements against the objectives and the comments; ratings move where the explanation does not hold; the merit budget is then allocated against calibrated ratings rather than against who argued loudest. The free final comments worksheet on this site turns the calibrated rating into the outcome and the new salary, with example comments beside the figures.
Where a small company should stop
Do not show employees their cell. The grid is a management tool for calibration and succession, and a cell shown to an employee becomes a label they carry for years. Do not use potential to decide the merit increase; pay follows performance, and the potential axis feeds the development plan and the succession conversation only. Do not keep the grid in a slide deck; keep each employee's placement, dated, on their cycle record, so next year's grid can be compared with this year's. Reviewvo Pro keeps the rating, the placement and the outcome together per employee per cycle, calibrated across the team.
Questions people ask about 9 box
What is a 9 box grid?
A three-by-three grid of performance against potential. Each employee is placed in one cell after the review so a team's ratings can be seen together and calibrated across managers.
Should employees see their 9 box placement?
No. The grid is a management tool for calibration and succession. A cell shown to an employee becomes a label; the review conversation should be about the rating, the comments and the development plan.
Does the 9 box decide the merit increase?
The performance axis, which is the calibrated rating, feeds the merit increase. The potential axis feeds the development plan and succession only. Paying for potential rewards a guess.