Calculator/Retention vs Recruitment
Retention vs Recruitment: Which Costs More?
Retaining an employee costs 10 to 25% of their salary in total annual investment. Replacing them costs 50 to 200%. The math favours retention in most cases, but not all. Here is a nuanced, data-driven comparison.
Average retention cost per employee per year
10-25%
Of annual salary (raises, training, benefits, engagement)
Average replacement cost per departure
50-200%
Of annual salary (recruitment, vacancy, ramp, knowledge loss)
Side-by-Side Comparison: 8 Dimensions
| Dimension | Retention | Recruitment |
|---|---|---|
| Direct cost | 10-25% of salary annually (raises, training, benefits) | 50-200% of salary per event (recruiter, vacancy, ramp) |
| Time investment | Ongoing, small increments (hours per quarter) | Concentrated burst (100+ hours over 3-6 months) |
| Productivity impact | Maintains or improves current output | 3-9 month productivity gap during transition |
| Knowledge preservation | 100% of institutional knowledge retained | Significant knowledge loss; months to rebuild |
| Team stability | Reinforces team cohesion and morale | Disrupts team dynamics; triggers contagion risk |
| Scalability | Requires individual attention; harder to scale | Process-driven; more scalable for high-volume roles |
| Risk level | Low risk; worst case is the employee leaves anyway | Higher risk; new hire may not work out (30% fail within 18 months) |
| ROI timeline | Immediate (avoids cost from day one) | 6-12 months to recoup investment |
When Retention Wins
- The employee is a strong performer in a role with high replacement cost (engineering, sales, executive).
- The departure reason is addressable: compensation below market, manager quality issues, lack of growth path, or workload concerns.
- The employee holds significant institutional knowledge or key client relationships.
- The team has already experienced recent departures and the contagion risk is elevated.
- The cost of the retention intervention (raise, promotion, flexibility) is less than 50% of the replacement cost.
When Recruitment Wins
- The employee is consistently underperforming and has not responded to coaching or performance management.
- The role is being eliminated or fundamentally restructured as part of a strategic pivot.
- The employee's salary has drifted significantly above market and a correction would create internal equity problems.
- The departure reason is not addressable: the employee wants to change careers, relocate, or start a business.
- The role has a large, available talent pool with short hiring timelines and low ramp-up requirements.
The Break-Even Analysis
At what point does a retention investment pay for itself versus the cost of replacement? The break-even point is straightforward to calculate:
Break-even = Replacement Cost x Probability of Departure
For an engineer earning $130,000 with a 1.8x replacement cost ($234,000), if you estimate there is a 40% chance they leave within 12 months:
Expected loss
$93,600
$234K x 40%
Retention investment
$20,000
15% raise + training
Net expected saving
$73,600
Even if retention only works 50% of the time
The retention investment needs to reduce departure probability by just 9 percentage points (from 40% to 31%) to break even. In most cases, a meaningful retention action reduces departure risk by 20 to 40 percentage points.
Decision Checklist
When an employee signals they may leave, work through these questions:
- 1Is this person a strong performer? If no, consider whether you should retain them.
- 2What is the replacement cost for this specific role? (Use the calculator or by-role data.)
- 3Is the departure reason addressable? (Compensation, manager, growth, flexibility, workload.)
- 4What would the retention intervention cost? (Raise amount, training budget, role change.)
- 5Is the retention cost less than 50% of the replacement cost? If yes, the investment is clearly justified.
- 6Are there contagion risks? Would this departure trigger others? If yes, the effective replacement cost is higher.
- 7Can you execute the retention action quickly enough? Bureaucratic delay often means the window closes.
For engineering roles specifically: See EngineeringHiringCost.com for detailed hiring cost data