Quick Forecast Inputs
Growth - enter Target OR Growth Rate
Cost Inputs
Options
Department Planning
Enter data per department. Growth can be headcount (#) or percentage (%).
| Department | Current HC | Growth Target | Attrition % | Avg Salary | Benefits % |
|---|
Quarterly Roadmap
Distribute total new hires across quarters. Percentages must sum to 100%.
Results
Headcount Composition
Scenario Comparison
Conservative = Growth×0.8, Attrition×1.1 | Aggressive = Growth×1.2, Attrition×0.9
How to Calculate a Headcount Plan
Headcount planning is built on a simple but important formula:
Attrition Losses = Current HC × Attrition Rate % Backfill Hires = Attrition Losses Growth Hires = max(0, Ending HC − Current HC + Attrition Losses) Total New Hires = Growth Hires + Backfill Hires Ending HC = Current HC − Attrition Losses + Total New Hires Fully Loaded Cost = Base Salary × (1 + Benefits Load %) Total Budget = Total New Hires × Fully Loaded Cost
Worked Example
Company with 100 employees, targeting 120 year-end headcount, 15% attrition, $70,000 avg salary, 25% benefits load:
- Attrition Losses = 100 × 15% = 15
- Backfill Hires = 15
- Growth Hires = max(0, 120 − 100 + 15) = 35
- Total New Hires = 15 + 35 = 50
- Fully Loaded Cost = $70,000 × 1.25 = $87,500
- Total Budget = 50 × $87,500 = $4,375,000
Industry Attrition Benchmarks
Use these approximate annual voluntary + involuntary attrition rates (2024-2025 HR averages) as a starting point for your planning. Actual rates vary by organization size, location, and role level.
| Industry | Annual Attrition % |
|---|---|
| Technology | 13% |
| Healthcare | 20% |
| Finance | 12% |
| Retail | 30% |
| Manufacturing | 15% |
| Education | 10% |
| Government | 8% |
| Hospitality | 35% |
| Professional Services | 14% |
| Non-Profit | 18% |
| Other / Global Average | 15% |
Headcount Planning Best Practices
- Connect to business plan. Every new hire should map to a revenue, product, or operational goal. If you cannot articulate why you need each role, challenge it.
- Bake in attrition from day one. Most plans forget that some of this year's hires are replacing people who will leave. Using your realistic attrition rate - not zero - is the single biggest accuracy improvement you can make.
- Phase hires quarterly. Spreading hiring evenly assumes your recruiting capacity is infinite. Use the Quarterly Roadmap mode to align hiring volume with your TA team's throughput and your budget release schedule.
- Budget fully loaded cost, not just base salary. Benefits, employer taxes, equipment, and overhead typically add 20-40% on top of base salary. Use a realistic benefits load % to avoid mid-year budget surprises.
- Run scenario plans. At minimum, have a conservative (lower growth, higher attrition), base, and aggressive scenario. Click "Compare Scenarios" to see the budget impact of each. Present all three to leadership.
- Review monthly, not annually. Headcount plans go stale quickly. Set a monthly review cadence to compare actuals vs. plan and re-forecast the remainder of the year.
- Cross-reference with Time to Fill and OAR data. A headcount plan that assumes you can hire 50 people in Q1 when your average Time to Fill is 60 days is not a plan - it is a wish. Use your Time to Fill Calculator and Offer Acceptance Rate Calculator to pressure-test your roadmap.
FAQ
What is headcount planning?
Headcount planning is the process of forecasting how many employees an organization needs over a future period to meet its business goals, accounting for expected attrition, growth targets, and budget constraints. It is the starting point of any workforce plan and directly informs recruiting, L&D, compensation, and facilities budgets.
How do I calculate headcount for next year?
Start with your current headcount. Multiply by your expected attrition rate to get attrition losses. Then determine how many additional people you need to reach your target headcount (growth hires). Total New Hires = Growth Hires + Backfill Hires (to replace attrition). Ending Headcount = Current HC − Attrition + Total New Hires. Use the Quick Forecast tab above to run this calculation instantly.
What is the difference between growth hires and backfill hires?
Backfill hires replace employees who leave due to attrition - they keep you at the same headcount level. Growth hires are net-new additions above your current staffing, needed to reach a higher target. Both count toward your total new hire requirement and your total budget. Plans that only count growth hires systematically underestimate hiring volume.
How does attrition affect my hiring plan?
Every percentage point of attrition creates backfill pressure. For a 100-person company at 20% attrition, you need to hire 20 people just to stay flat - before adding a single growth hire. High attrition rates (retail, hospitality) can mean more than half of all annual hires are backfills, which is important context when presenting hiring plans to finance and leadership.
What is a fully loaded employee cost?
Fully loaded cost = Base Salary × (1 + Benefits & Overhead Load %). It captures the true total cost of employment beyond salary, including employer payroll taxes, health insurance, retirement contributions, equipment, office space, and other overhead. A 25% benefits load on a $60,000 salary gives a fully loaded cost of $75,000 - this is the figure HR and Finance should use when planning budgets.
Should I plan headcount by department or company-wide?
Both. Start with a company-wide Quick Forecast to set the total headcount and budget guardrails. Then use Department Planning mode to allocate that plan across functions, each with their own salary bands and attrition rates. This combination gives you the big-picture number that Finance needs and the per-department detail that hiring managers need.
How do I phase hiring across quarters?
Use the Quarterly Roadmap tab. Enter what percentage of your total new hires you plan to make in each quarter (Q1-Q4). The tool applies a time-weighting factor (Q1 = full year cost, Q4 = quarter year cost) to show the annualised budget impact of your hiring schedule. This helps you spread recruiting load and manage cash flow.
Is my headcount and salary data private?
Yes - completely. All calculations run in your browser using JavaScript. No data is transmitted to any server, stored in any database, or used for any purpose. The only storage this tool uses is your own browser's localStorage, and only when you click "Save Preset" - that data never leaves your device.