Moving an intern into a permanent role at the end of their internship, usually through a pre-placement offer made before or shortly after the internship ends.
Not re-interviewing your own intern as if they were an external candidate. You have six months of evidence; re-weighting four hours of interview against it is a decision-making error, not rigour.
Conversion is the cheapest hire available in most organisations. No agency fee, a ramp measured in weeks rather than months, and — most importantly — a mis-hire probability far below anything an interview process can achieve, because you watched the person work.
It is also the hire most often lost, and almost always for the same reason: nobody decided whether a seat existed until after the internship ended, by which time the intern had accepted something else.
When this is the right hire
Compared with hiring externally for the same seat:
the intern met the bar. Six months of observed work is better evidence than any interview process produces, and the cost difference is substantial once agency fees, ramp time and mis-hire risk are counted.
they did not meet the bar. Converting an adequate intern because the seat exists and re-hiring is effort is how teams acquire performance problems they manage for years.
How to do it well
- 1Decide the seats before the internship starts
Conversion decided afterwards converts from the wrong end of the cohort — the interns with the strongest outside options cannot wait for an answer.
- 2Tell interns the truth about the number in week one
"Two seats, and here is what the decision is based on" outperforms "we'll see", including with the interns who do not get one.
- 3Assess against the written scope, throughout
The midpoint and final reviews should make the conversion decision readable. If it rests on something in neither, the process failed earlier.
- 4Decide within two weeks of the end
Either way. Interns who hear nothing assume no, tell their whole cohort, and accept elsewhere.
- 5Price on the role, not on the stipend
Anchoring the offer on what you paid the intern is the most common self-inflicted conversion loss.
- 6Manage the gap for final-year interns
A summer intern returning to a final year has a nine-month gap ahead. Everything that applies to campus offers applies here.
What to pay
Price the conversion offer at the market rate for the role you are hiring into. The internship stipend reflected a short learning engagement and has no bearing on what a permanent seat is worth. Candidates compare their offer with what their classmates are receiving, not with what they earned as interns — and a below-market offer to someone you assessed for six months is the most expensive possible way to lose a hire.
How to assess
- Deliverable completion against the scope agreed at the start — objective, and the thing you told them you would assess.
- Trajectory between the midpoint and final reviews, which matters more than the endpoint at this level.
- The mentor's recommendation, with evidence rather than impressions.
- The honest test: if this person applied externally today, knowing everything you now know, would you hire them?
- Not: how they compare with the rest of this cohort. Cohort ranking converts the best of the cohort rather than someone who meets the bar.
What goes wrong
The defining failure. You convert from the wrong end of your own cohort because the strongest interns could not wait.
Loses the candidate you spent six months assessing, over an amount smaller than the cost of replacing them.
Discards six months of evidence in favour of four hours of interview. That is a worse decision process, not a more rigorous one.
They assume no, they tell their cohort, and both outcomes are permanent.
A performance problem you will manage for two years, acquired to avoid a re-hire.
Questions employers ask
Is converting an intern cheaper than hiring externally?+
Usually and substantially, through the avoided agency fee, a much shorter ramp and far lower mis-hire risk. It is not automatic — a long expensive internship converted at a salary close to lateral market rate narrows the gap. The conversion ROI calculator prices both paths over the first year.
When should we make a pre-placement offer?+
Within two weeks of the internship ending, and earlier for interns returning to a final year. An early written PPO removes their placement-season anxiety entirely, which is worth more to them than a modestly larger offer made later.
Should we re-interview an intern before converting them?+
A conversation about the role, yes. A fresh interview loop, no — it discards six months of observed work in favour of four hours of interview, which is a worse basis for the decision, not a more rigorous one.
What if the intern was good but there is no seat?+
Tell them clearly and early, give them the certificate and a strong reference, and keep them in a talent pool with their graduation date. Interns rejected on seats rather than on quality are the cheapest future hire you will ever have — and how you handle the no determines whether they answer your call.
How do we set the conversion salary?+
At the market rate for the role. The internship stipend was for a short learning engagement and has no bearing on what a permanent seat is worth. Your stipend policy should say this explicitly, because the conversation happens under time pressure otherwise.
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