The hire vs train cost calculator puts two staffing routes on the same footing for a single year. One route is hiring someone who already has the experience, paying more in salary and usually more in recruiting fees, and getting to full output quickly. The other is hiring someone junior, paying less in salary, and absorbing training costs, mentoring time and a long period at reduced output. The comparison is worth doing explicitly because the salary difference is visible and the ramp cost is not.
At Arb Digital we build free tools that stay inside their competence, and this one is arithmetic and nothing more. It takes every rate, salary and percentage from you and publishes none. It does not tell you which route to take, does not model any individual's performance, and has nothing to say about the legal side of employment decisions — which is real, jurisdiction-specific, and belongs with a qualified adviser rather than a calculator.
What This Hire vs Train Cost Calculator Does
Each route is costed the same way. Base salary is grossed up by an employer on-cost percentage to give a loaded annual cost. Recruiting cost is added. For the junior route, a training programme cost and the value of mentoring time are added as well. Then the ramp-up productivity loss is valued: the productivity loss percentage, multiplied by the ramp period expressed as a fraction of a year, multiplied by the loaded annual cost. That last term is the one people leave out, and it is usually the largest single difference between the two routes.
The output is a first-year total for each route, the gap between them, and which is lower. The bars scale both totals against the larger so the size of the difference is visible rather than needing arithmetic to see.
How to Use It
- Enter both base salaries. Use the actual offer figures for your market, not published averages. This page deliberately publishes none.
- Set the employer on-cost percentage. This covers employer payroll taxes, pension or retirement contributions, insurance and any statutory levies. The right figure depends entirely on your jurisdiction and your benefits package.
- Enter recruiting cost for each route. Agency fees, advertising, assessment tools and the time your own team spends interviewing all belong here if you can value them.
- Set the ramp period and productivity loss for each. An experienced hire still ramps — new systems, new codebase, new relationships. Use an average loss across the ramp period rather than a starting figure.
- Add training and mentoring for the junior route. Mentoring is the cost most often omitted: a senior person's hours spent teaching are hours not spent on their own work.
The Formula — How Each Route Is Costed
Loaded salary is base salary multiplied by one plus the on-cost percentage. Ramp cost is the productivity loss percentage, multiplied by ramp months divided by twelve, multiplied by that loaded salary — in other words, the share of a year's paid capacity that the ramp consumed. First-year total for the experienced route is loaded salary plus recruiting plus ramp cost. For the junior route it is loaded salary plus recruiting plus training plus mentoring plus ramp cost.
Two things about that formulation are worth stating. It values ramp loss at cost rather than at the revenue or output foregone, which is the conservative choice; if the role generates measurable revenue, the true cost of a slow ramp is higher than this shows. And it treats the mentor's hours as a straight cost at a rate you supply, which is the simplest defensible treatment. On the human-capital thinking behind either route — building capability internally versus buying it in — professional bodies such as SHRM's talent acquisition resources publish extensive practitioner material on how organisations frame the choice.
A Worked Example
Take the defaults. The experienced hire is on a base of 110,000. At 22 per cent on-costs the loaded salary is 134,200. Recruiting cost is 18,000. The ramp is two months at an average 50 per cent productivity loss, so the ramp cost is 0.50 multiplied by two twelfths, multiplied by 134,200, which is 11,183. The first-year total is 134,200 plus 18,000 plus 11,183, which is 163,383.
The junior hire is on a base of 62,000. Loaded at the same 22 per cent, that is 75,640. Recruiting cost is 4,000 and the training programme is 9,000. The ramp is nine months at an average 60 per cent loss, so the ramp cost is 0.60 multiplied by nine twelfths, multiplied by 75,640, which is 34,038. Mentoring is 120 hours at 75 per hour, which is 9,000. The first-year total is 75,640 plus 4,000 plus 9,000 plus 34,038 plus 9,000, which is 131,678.
The junior route is 31,705 cheaper in year one. But look at what the ramp did. The salary gap between the two routes is 58,560 on a loaded basis — and more than half of that advantage was consumed by ramp loss, training and mentoring. Stretch the junior ramp to twelve months at the same loss rate and the ramp cost rises to 45,384, cutting the advantage to about 20,000. Push the mentoring to 300 hours and it falls further. The comparison is genuinely sensitive to assumptions that most people never write down.
What This Arithmetic Cannot Tell You
Cost is one input into a staffing decision and rarely the deciding one. Several things this calculator cannot model matter at least as much.
- Risk. An experienced hire's capability is more observable before you commit. A junior hire's trajectory is a genuine unknown, and the range of outcomes is much wider in both directions.
- Opportunity cost of time. If the work is urgent, nine months of reduced output is not a discount you get to enjoy; it is a delay with its own consequences.
- Capacity to teach. The junior route assumes someone senior is available to mentor. If nobody has the time, the training does not happen and the ramp lengthens indefinitely.
- Retention. Both routes leave. Neither salary premium nor training investment survives an early departure, and the first-year cost is entirely sunk if it does.
- Team composition. A team of only seniors and a team of only juniors both fail, in different ways. The right answer often depends on who is already there.
The Assumptions Buried in the Ramp Figure
The ramp inputs deserve more scrutiny than they usually get, because they carry the largest single cost difference and are almost always estimated from memory. Three specific errors recur. The first is treating ramp as a productivity figure at day one rather than an average across the period — someone who starts at ten per cent productivity and reaches full output in month nine has an average loss over that period of roughly half, not ninety per cent. Use the average.
The second is assuming experienced hires do not ramp. They do: unfamiliar systems, undocumented processes and relationships that have to be built all take time regardless of seniority, and two to three months at meaningfully reduced output is common. Setting the senior ramp to zero systematically favours that route. The third is ignoring the mentoring drag on the mentor's own ramp-adjusted output — a senior person giving 120 hours to a junior is not merely spending 120 hours; they are also context-switching around them.
If you want the loaded-cost side of this calculation on its own, our employee cost calculator builds a fully loaded annual and hourly cost from a salary. For a different axis of comparison entirely, the contractor vs employee calculator compares employment types on the same basis rather than comparing seniority levels — the two pages answer different questions and are worth running together when a role could plausibly be filled either way.
The Legal Side Is Not Arithmetic
Employment decisions carry obligations that no calculator can represent. Redundancy processes, notice periods, consultation requirements, probation rules, fixed-term and apprenticeship arrangements, training-cost clawback agreements and the enforceability of any of them vary by jurisdiction and change over time. In the United Kingdom, for example, the process an employer must follow is set out by Acas guidance on redundancy; other countries have their own frameworks and they differ substantially. Non-discrimination obligations apply throughout, and an approach that treats age or experience as a proxy for anything else can create real legal exposure.
Treat this page as a costing worksheet and nothing else. Before acting on any staffing decision — restructuring, replacing a role, or attaching repayment conditions to training — take advice from an employment lawyer or a qualified HR adviser in your jurisdiction. The arithmetic is the easy part and it is not the part that goes wrong.
Arb Digital builds websites and content that carry more demand without carrying more headcount. Sometimes the cheapest hire is a better funnel.
See Web Growth Services Talk to Arb DigitalCommon Mistakes to Avoid
- Comparing base salaries alone. On-costs, recruiting, training and ramp routinely account for more than a third of a first-year total.
- Setting the experienced hire's ramp to zero. Everyone ramps. Assuming otherwise builds the conclusion into the inputs.
- Using day-one productivity as the ramp figure. The input wants the average loss across the whole ramp period, which is usually about half the starting figure.
- Forgetting mentoring time. Senior hours spent teaching are real cost and are the most commonly omitted line in the junior route.
- Deciding on one year. Ramp and training are one-off; the salary difference recurs. A three-year view frequently reverses a one-year conclusion.
Related Free Tools From Arb Digital
For the loaded cost of a single hire, use the employee cost calculator; to compare employment types rather than seniority, the contractor vs employee calculator. The hourly to salary calculator and salary to hourly calculator convert between pay bases, the employee turnover rate calculator covers retention, and the employee tenure calculator measures service length. For the payback on any of it, see the payback period calculator. The free tools hub has the rest.
Frequently Asked Questions
The total first-year cost of two staffing routes: hiring someone already experienced, and hiring a junior and training them. Each route is costed as loaded salary plus recruiting, plus training and mentoring where applicable, plus the value of ramp-up productivity loss.
As the average productivity loss percentage across the ramp period, multiplied by the ramp months as a fraction of a year, multiplied by the loaded annual cost. This values the loss at what the time cost you rather than at the revenue foregone, which is the more conservative treatment.
Yes. Unfamiliar systems, undocumented processes and new working relationships all reduce output for a period regardless of seniority. Setting the experienced ramp to zero builds a conclusion into the inputs rather than testing it.
Employer payroll taxes, pension or retirement contributions, insurance, and any statutory levies that apply where you employ people. The correct figure depends entirely on your jurisdiction and benefits package, so this calculator takes it as an input.
Because training, recruiting and ramp costs are one-off while the salary difference recurs every year. A junior route that looks cheaper in year one can look very different once the ramp is behind you and pay progression begins.
No. It is a cost comparison only. It does not model performance, retention, or the wider range of outcomes that comes with hiring someone whose capability is less directly observable at the point of offer.
Yes, and they are outside what any calculator can address. Redundancy, notice, consultation, probation, training repayment agreements and non-discrimination obligations all vary by jurisdiction. Take advice from an employment lawyer or qualified HR adviser before acting.
This tool performs arithmetic on figures you enter and is for general business education only. It publishes no salary data or rates, and it is not legal, financial, tax or human-resources advice. Redundancy, notice periods, training-cost repayment agreements and non-discrimination obligations are legal matters that vary by jurisdiction — consult an employment lawyer or qualified adviser before making any staffing decision.
