How many recruiters do you actually need
The ratios in vendor whitepapers are useless. Work it out from your own funnel.
Someone will tell you the benchmark is twenty five reqs per recruiter. Someone else will say eight. Both are quoting a survey of companies that do not resemble yours.
The honest answer comes from your own data, and you can get it in an afternoon.
Start from hours, not reqs
Take three recently closed roles of different types. For each, count the hours your team spent: intake, sourcing, screening, scheduling, debriefs, offer, admin. Be unkind about it and include the rescheduling.
You will typically find a range from about twenty hours for a repeatable role you have hired ten times, to well over a hundred for a first in company senior hire.
Multiply by realistic throughput
A recruiter has roughly twenty five productive hours a week once you remove meetings, training and the general noise of an office. Not forty. Divide your plan for the quarter by that and you have a number that will survive scrutiny.
Adjust for three things
Hiring manager maturity. A manager who has hired fifteen people consumes a third of the recruiter time of one hiring for the first time. If you are growing into a lot of new managers, your ratio gets worse before it gets better.
Scheduling ownership. If recruiters still book interviews by hand, you are paying senior salaries for calendar work. Coordination support usually pays for itself somewhere around six recruiters.
Sourcing load. Roles where inbound covers the funnel are a different job from roles where every candidate is found. Do not average them into one number.
Then plan for the trough
Hiring is seasonal and lumpy. If you staff for peak, you will carry idle recruiters and eventually cut them, which costs you the institutional knowledge you spent a year building. Staff to the steady state and use contractors or an agency for the spikes. It is more expensive per hire and much cheaper per year.
The ratio you land on will look nothing like the benchmark, and that is fine. You can defend a number you built from your own funnel. You cannot defend one you read in a PDF.