Sales Capacity Planning

Sales capacity planning is the process of modelling how much revenue a sales team can realistically generate given its current and projected headcount, ramp schedules, average quota levels, and average deal sizes. It is the foundation of a credible revenue plan — without it, targets are set top-down from financial requirements rather than bottoms-up from what the team can actually deliver.

The basic capacity model

A simple capacity model multiplies the number of fully-ramped quota-bearing representatives by their average quota to produce total team capacity. It then adjusts for ramp time (new hires contribute only a fraction of their quota in their first months), attrition (some percentage of the current team will leave), and quota attainment (not every rep hits 100%). The result is a realistic revenue ceiling — not a stretch aspiration — that can be compared against the revenue plan to reveal gaps that need to be filled by hiring or improving productivity.

Where capacity models fail

The most common failure in capacity planning is using optimistic ramp assumptions. If ramp time is modelled at three months but the actual average is six, every hire's contribution is overstated for the first two quarters. Revenue plans built on this assumption systematically miss. A second common failure is excluding ramp and attrition entirely — treating all headcount as fully productive from day one — which produces plans that are physically impossible to execute.

Capacity vs. pipeline coverage

Capacity planning tells you how much revenue the team can close. Pipeline coverage modelling tells you whether there is enough pipeline to achieve it. The two are related but distinct. A team may have the capacity to close £4m in a quarter but only £6m of pipeline (at a 3x coverage ratio) to do it from. If the pipeline is £8m of which 40% is accurately qualified, the actual deliverable coverage is still only 3x. Both models need to be run together to give an accurate forecast view.

Using capacity planning to build the hiring plan

Capacity modelling also runs in reverse: if the revenue target is known and the current team's ceiling is known, the model produces the minimum hiring rate and timing required to meet the plan. Because of ramp time, hires made in Q3 may not contribute meaningful revenue until Q1 of the following year. Revenue leaders who run capacity models early can surface these dependencies and influence the hiring plan before the gap becomes unrecoverable.

How Closing Foundry uses it

Sales capacity planning is the foundation of every Revenue Planning engagement we run. Before a founder commits to a headcount plan or a revenue target, we build a bottoms-up capacity model that translates headcount, ramp time, quota levels, and expected attainment into a realistic revenue ceiling. In most cases, the first model we build reveals that the committed plan is physically impossible at the current or projected headcount — usually because ramp time has been underestimated and quota assumptions are not calibrated to historical attainment. The capacity model becomes the shared language between the founder, their board, and their team: it makes the revenue plan inspectable and gives everyone a common basis for the conversations about what needs to change to hit the number.