Hiring vs Promotion Calculator — Which Actually Costs Less for Your Open Role?

Which costs less over 24 months — external hire or internal promotion?

⚖️ Hiring vs Promotion Calculator

Which Actually Costs Less Over 24 Months?

Compare true 24-month cost: recruiting, ramp, salary, training, retention risk, and team impact.

🎯 Role

Annual salary for the open role

🔍 External Hire

Recruiting fee (agency/ads/time) bench: 20–30% salary

Ramp time to full productivity bench: 4–8 mo

months

Training & onboarding cost

24-month departure probability bench: 25–40%

Team & culture impact cost

⬆️ Internal Promotion

Promoted employee's current salary

Ramp time to full productivity in new role bench: 1–3 mo

months

Development & training for new role

24-month departure probability bench: 8–15%

Backfill cost for vacated role

Team & culture impact cost

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What This Does

When a senior role opens up, most organizations default to one of two options — promote someone internally or hire externally — without rigorously comparing the true financial cost of each. The result is a decision driven by gut feel, politics, or whichever option is most visible, rather than the one that's actually better for the business. The Hiring vs Promotion Calculator computes the total 24-month cost of each path across six dimensions: Recruiting Cost (agency fees, job board spend, interview time), Ramp Time Cost (how long before the person is fully productive, and what that gap costs), Compensation Delta (the salary difference between an external hire and the promoted employee, plus any backfill cost), Training & Onboarding (all development required to bring either person to full capability), Retention Risk (the probability each path leads to departure in 24 months, and the cost of replacing them), and Culture & Team Impact (estimated cost of team disruption, morale effects on the team that was passed over, and knowledge transfer). The result is a side-by-side 24-month total cost comparison, a break-even analysis showing when each option becomes more expensive than the other, and a recommendation with the specific factors that drive the difference. Most organizations are surprised: external hires typically cost 40–80% more than promotions on a true 24-month basis.

Assumptions

·24-month total cost of ownership comparison
·Ramp cost assumes 50% productivity during ramp-up period
·Retention risk probability applied to full replacement cost

When Should You Use This?

→A senior or specialized role has opened and you have at least one qualified internal candidate
→You want to build the business case for promoting internally vs going to market
→You are evaluating whether the premium for an experienced external hire is justified
→You have a skill gap on the team and need to decide whether to hire for the skill or develop it internally
→You want to compare the 24-month cost of two or more hiring scenarios

Example Scenario

A $120M software company has a VP Engineering role open. External hire: $35k agency fee, $180k salary, 5-month ramp to full productivity at $180k/yr. Internal promotion: $0 recruiting cost, $155k salary (from $125k), 2-month ramp, plus $90k backfill for the promoted person's old role. On paper, external looks simpler. But 24-month comparison: External total cost $412k. Internal total cost $296k. Internal saves $116k, even counting the backfill. If the external hire leaves in month 18 (30% probability for external hires in competitive markets), total cost jumps to $580k.

Frequently Asked Questions

Is it always cheaper to promote internally?

Not always — but it is more often than most organizations expect. Internal promotion becomes less favorable when: the internal candidate requires 12+ months of development before being effective, the role has highly specialized external skills that don't exist internally, or the cultural signal of 'always promoting internally' is actively harmful (can create insularity). External hiring becomes more favorable when you genuinely need a capability the organization doesn't have and can't develop in time.

How do I calculate ramp time cost?

Ramp cost = (Months to full productivity × Monthly salary) × (1 - Average productivity during ramp). If an external hire takes 6 months to fully ramp and is 50% productive during that time, ramp cost = 6 × (annual salary / 12) × 0.5. For internal promotions, ramp is typically 1–3 months because the person knows the company, systems, and culture — even if the role is new.

What is a typical agency recruiting fee for senior roles?

Retained or contingency search fees for senior roles typically run 20–30% of first-year salary. For a $150k role, that's $30k–45k. For very senior roles ($200k+), retained firms often charge 33%. In-house recruiting has lower hard costs but higher time costs — calculate the hours spent by recruiters, hiring managers, and interviewers at their hourly rates.

How do I estimate retention risk for each option?

External hires in the first 24 months leave at roughly 20–30% higher rates than established employees. For senior roles in competitive markets, 24-month external hire departure rates of 30–40% are common. Promoted employees leave at 10–15% rates in the same window (lower because promotion increases engagement). The cost of departure includes recruiting cost + ramp cost again — which is why retention risk is the single biggest factor in 24-month TCO.

What about the team that gets passed over for a promotion?

The morale and retention cost of passing over a strong internal candidate for an external hire is real and underestimated. Studies suggest the team member most likely to feel passed over has a 25–40% higher departure probability in the following 12 months. If that person is high-value, their replacement cost adds significantly to the true cost of the external hire decision. The calculator includes an optional team impact field for this reason.