Free Calculator

Promote From Within or Hire From Outside?

The offer letter is the visible cost. The invisible ones are recruiting, months of ramp, and the premium the market charges for strangers. Here is the honest year-one comparison, so the decision runs on numbers instead of habit.

$

Market rate for the role

$

Their new salary after the raise

$

Ads, agency or sourcing, interview hours

1 5 mo 9
0 2 mo 6

Year-one difference

$0

External, year one

$0

salary + recruiting + ramp

Internal, year one

$0

salary + process + ramp

Ramp gap

0 mo

context the insider has

Salary premium

$0

external over internal

The Year-One Breakdown

Loaded salary, acquisition cost, and the price of partial output during ramp, side by side. The invisible columns are the ones that decide it.

External hire

$0

Internal promotion

$0

What This Number Means for You

Count the backfill honestly, in both directions.

Promoting from within opens a seat behind the promotion, so part of the internal saving goes to a backfill. The pattern still usually favors internal, because you backfill a more junior, cheaper, faster-to-ramp role. Price that second hire with the cost per hire calculator before you call the comparison done.

A forced promotion costs double.

If the internal candidate is not ready, the cheaper option becomes the expensive one: the role underperforms and you damage a good IC on the way. Readiness is checkable before the title changes; the Should I Promote This Employee quiz walks the signals, and the cost of bad hire calculator shows the downside you are protecting against.

The premium sometimes buys exactly what you need.

New capability nobody inside has, genuine outside perspective, or simply no ready candidate: in those cases the external premium is a purchase, not a waste. Budget the ramp honestly with the onboarding timeline calculator so the purchase gets the support it needs to pay off.

About the numbers: Year-one cost = loaded salary (salary × 1.3) + acquisition cost + ramp cost, where ramp cost = ramp months × loaded monthly cost × 40% average productivity gap during ramp. The internal path uses a flat $2,000 process cost (posting, interviews, transition time). The model excludes the backfill for the promoted person's old seat and any counteroffer dynamics; both are discussed above. Research on external hiring consistently finds outsiders are paid more and take longer to reach insider performance, which the defaults reflect. Planning estimates, not a compensation policy.

The Habit of Looking Outside

When a role opens, most organizations reflexively write a job posting. The external market feels like where hiring happens, the internal candidate feels like a stretch, and the fact that the insider is a known quantity somehow counts against them ("we know their gaps") while the stranger's gaps are invisible ("great interview"). The result is a systematic bias toward the more expensive option: pay more, wait longer for productivity, and accept higher uncertainty, all while telling your best insider that the path up runs through the exit.

The numbers above will not always favor the promotion, and they should not. Sometimes the capability genuinely is not in the building. But running the comparison forces the real question: are you paying the external premium for something, or out of habit?

What the Spreadsheet Cannot See

Two factors live outside the math and deserve a named place in the decision. First, the signal: every promotion teaches the team that growth happens here, and every passed-over ready insider teaches the opposite lesson at compound interest. Second, the perspective: a team that has promoted from within three times in a row is running one playbook, and sometimes the most valuable thing an outsider brings is the sentence "why do you do it this way?" Neither factor fits in a cell. Both belong in the conversation.

Frequently Asked Questions

Why does the external hire usually cost more?
Three stacked reasons. Recruiting: sourcing, agency fees, and interview hours that an internal move mostly skips. Salary: hiring from the market means paying the market, and research on external hiring has consistently found external hires command higher pay than promoted insiders for the same role. Ramp: an outsider learns your systems, customers, and unwritten rules from zero, which means months of partial output that an insider already has behind them.
Does the internal option not just move the hole? I still have to backfill.
Yes, and honest accounting includes it. The usual pattern still favors internal: you backfill a more junior seat, which is cheaper to recruit for, ramps faster, and carries lower mishire risk than the senior role you were originally filling. The promotion also converts one hire into two development moves. But if the backfill would be just as senior and scarce, the internal advantage shrinks, and this calculator's gap narrows accordingly.
When is the external hire worth the premium?
Three honest cases. When the role needs a capability nobody inside has (not "could learn," but "must arrive knowing"). When the team genuinely needs outside perspective, because promoting from within reproduces the current playbook. And when there is no ready candidate: promoting someone who is not ready costs double, since the role underperforms and you damage a good IC in the process. The premium buys something real in all three cases; the mistake is paying it out of habit.
What is a normal promotion raise?
Typically 10 to 20 percent for a step up in responsibility, more if the person was underpaid to begin with. Beware the false economy at the bottom of that range: promoting someone into a bigger role at a token raise reads as "more work, same money," and the market will eventually correct it for you, at replacement cost. Price the promotion against the role, not against their old salary.
Does promoting internally help retention?
Strongly, and beyond the person promoted. A visible path upward tells every ambitious person on the team that growth happens here, and the leave-to-get-promoted pattern is one of the most preventable forms of turnover. The inverse also holds: repeatedly hiring outsiders over ready insiders teaches your best people exactly where their next promotion lives.
How do I know if my internal candidate is actually ready?
Look for evidence they are already doing pieces of the bigger job unprompted: leading without the title, being the person others route questions through, handling the hard conversation nobody assigned them. Readiness shows up before the promotion, not after. The Should I Promote This Employee quiz walks through the signals dimension by dimension, and it is harder to fool than your gut.

Check the Candidate Before You Check the Market.

If someone inside might be ready, verify it with signals instead of hope. Then run this comparison with real numbers and make the call on purpose.

Quiz: Should I Promote This Employee? → Calculator: Cost Per Hire →

Related: Cost of Bad Hire → Related: Onboarding Timeline →

← All Calculators