~2 min read
The most common mistake when budgeting headcount is using base salary as the cost. The true employer cost of an employee is base salary × 1.25 to 1.45 for most US knowledge workers, driven by mandatory payroll taxes and benefits.
What Makes Up Total Employee Cost
1. Employer payroll taxes (~7.65%) - FICA: 6.2% Social Security (on first $168,600) + 1.45% Medicare (no cap) - FUTA: 0.6% effective federal unemployment (on first $7,000 of wages) - SUTA: ~2.7% average state unemployment tax rate (on first $7,000–$56,500, varies by state)
2. Health insurance - Average employer cost: $8,000–$18,000/year per employee (2024 KFF data) - Family coverage: $14,000–$22,000/year - Self-only: $7,000–$10,000/year
3. Retirement contributions (optional) - 401(k) match: typically 3–6% of salary - At $100k salary with 4% match: $4,000/year
4. Bonus and equity - Target bonus for knowledge workers: 10–20% of base - Equity grants (RSUs (Restricted Stock Units)): $5,000–$50,000/year depending on level
The 1.25x to 1.4x Rule of Thumb
A quick mental model: multiply any salary by 1.3x for a fully-loaded employment cost estimate (taxes + health insurance + 401k match, no bonus). Add 15–20% for bonus-eligible roles.
| Salary | Taxes (~8%) | Benefits (~12%) | Total (1.2x) | + 10% Bonus (1.3x) |
|---|---|---|---|---|
| $80,000 | $6,120 | $9,600 | $95,720 | $103,720 |
| $120,000 | $9,180 | $14,400 | $143,580 | $155,580 |
| $150,000 | $11,475 | $18,000 | $179,475 | $194,475 |
Contractors vs. Employees
When comparing a W-2 hire to a contractor, remember that the contractor's rate includes their own taxes and benefits. A contractor at $75/hour is not 1.3x more expensive than an employee — the contractor is paying their own 15.3% SE tax and benefits. The true cost comparison requires adding the employee burden to the salary before comparing.
Frequently asked questions
What payroll taxes does the employer pay? Employers pay FICA (7.65%: 6.2% Social Security + 1.45% Medicare), FUTA (effective 0.6% on first $7,000 of wages), and SUTA (state unemployment tax, ranging from 0.6% to 8.5% depending on state and rate experience).
How much does health insurance cost the employer? According to the 2024 Kaiser Family Foundation survey, employers pay an average of $8,435/year for single employee coverage and $17,393/year for family coverage. This is the largest variable in the cost multiplier after payroll taxes.