Headcount Planning
The process of determining how many people to hire, when to hire them, and how each hire impacts the budget and runway.
The hiring impact card shows the exact burn rate and runway change from each planned hire.
What is Headcount Planning?
Headcount planning is the strategic process of deciding your team size and composition over time. For startups, it's one of the most important financial planning exercises because payroll is typically the largest expense — often 60-80% of total burn.
A headcount plan includes who to hire (role), when (start date), at what cost (salary + benefits + equipment), and the expected impact on the business (revenue generated, product shipped, support scaled).
The financial component is critical: each hire adds $8,000-$25,000+ per month to your burn rate (including benefits, taxes, and equipment). Two unplanned hires can cut 3-4 months off your runway.
Why it matters
Hiring is the single largest financial decision most founders make on a recurring basis. Each new team member is a long-term commitment that reduces runway. Letting someone go after a bad hire is expensive too — severance, lost productivity, and re-hiring costs.
A headcount plan connected to your financial model ensures every hire is intentional. You know exactly how each addition affects burn rate, runway, and your path to the next milestone.
Formula
Monthly Payroll Cost per Hire = Base Salary / 12 + Benefits + Taxes + Equipment (amortized) Total Payroll Impact = Sum of all employee monthly costs
Example
You plan to hire a senior engineer ($150K/year = $12,500/month salary) and a marketing manager ($120K/year = $10,000/month). With benefits (20% loaded), total monthly impact = $12,500 × 1.2 + $10,000 × 1.2 = $27,000/month. At a current burn of $80,000/month, this increases burn to $107,000. If you have $600,000 in cash, runway drops from 7.5 months to 5.6 months.
How RunwayCal helps
RunwayCal's Team module lets you add current and planned team members with start dates and salaries. The hiring impact card shows exactly how each hire changes your burn rate and runway. You can model different hiring timelines to find the optimal sequence.
Common mistakes
- 1Planning hires without modeling the runway impact of each addition
- 2Not accounting for the 1-2 month gap between deciding to hire and the person starting (and then 2-3 months to ramp)
- 3Hiring in batches instead of sequentially, which causes a sudden jump in burn rate
See the runway impact of every hire before you commit
RunwayCal's hiring impact card shows exactly how each new team member changes your burn rate and runway timeline.
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