Where to find it
Your HR system, payroll provider, or a quick headcount. Use full-time equivalents if you have a mix of part-time staff. Contractors who use company software count.
Why we ask
We use this as a general signal for organisational size. It helps calibrate whether the estimate is in a plausible range — a 5-person firm and a 200-person firm have very different software footprints.
Example
A 30-person accounting firm enters 30.