How to calculate the real cost and capacity of a new hire

The real cost of a new hire is the weekly wage plus the payroll burden and benefits you pay on top, plus one-time recruiting and equipment, set against the output the person actually adds while they ramp up, minus the time an experienced colleague spends mentoring them — and only up to the demand you really have. The method below walks through each step with one set of numbers, so you can repeat it with your own.

Start with the recurring cash cost

Begin with recurring cash cost. Forty paid hours at 20 cost 800. If the business enters 10% payroll burden and 120 of weekly benefits, software and workspace, recurring cost is 1,000. Recruiting and equipment are separate one-time costs, not a number spread invisibly through the wage.

Two details matter here. First, the burden rate is your own figure: employer taxes, insurance and contributions differ by country, by contract and over time, so take the rate from your payroll provider or adviser and write down where it came from. Second, count each benefit once. If your burden rate already includes health or pension contributions, do not enter them again as a weekly benefit — that is one of the most common ways a hiring estimate becomes too high.

Build the ramp week by week

Next build the ramp. At one output unit per productive hour, a 40-hour role at 25%, 50%, 75% and 100% productivity produces 10, 20, 30 and 40 gross units across four stages. Availability belongs in the same table: leave, onboarding days or a part-week start reduce the hours that can become output at all.

Subtract mentor time

If a mentor loses five productive hours in the first week, the net gain is only 5 units. Training time should not also appear as productive time. Mentor time is easy to forget because nobody pays for it separately — the cost shows up as work your best person did not do. Write down how many hours a week someone will spend explaining, checking and correcting, and how much output each of those hours would otherwise have produced.

Constrain the benefit by demand

Constrain benefit by demand. If customers need only 15 extra units, 40 units of theoretical capacity cannot create 40 units of contribution. Use the lesser of incremental demand and net capacity. This avoids making a hire appear profitable because the model sold work that does not exist.

A backlog changes the picture only once: it can absorb spare capacity until it is worked off, and after that the weekly extra demand is the limit again.

Calculate the steady break-even volume

Calculate steady break-even volume. At 1,000 recurring weekly cost and 50 contribution per extra unit, the role needs 20 incremental units per week to cover recurring cost. That is not the same as recovering the 5,000 setup cost. Put setup on its payment date and follow cumulative cash to find the break-even week.

If the contribution per unit is zero or negative, there is no sales volume that covers the cost — and a calculation that still prints a "required units" number is wrong.

Check the cash floor

A hire can be profitable over a year and still fail in week two. Add the cash you have at the start, put the one-time costs in the week they are paid and look at the lowest week-end balance. In the worked example, opening cash of 12,000, setup of 5,000 in week 1 and a slow first month give a lowest balance of 5,750. Against a floor of 5,000 that passes; with a smaller cash cushion or a larger setup bill, the same long-run winner would breach the floor before it pays back.

Employee vs contractor vs overtime

Compare alternatives on the same basis. A contractor can have a higher hourly rate but little setup and a faster ramp. Overtime can begin immediately but may carry a multiplier and an entered productivity effect. Part-time can fit a smaller demand gap. A no-hire scenario preserves cash but may leave backlog or owner overload.

In the worked example, a contractor at 32 an hour with a 5% platform fee costs 1,344 a week but needs only 400 of onboarding; ten overtime hours at time and a half cost 363 a week but add only 8.5 units after an entered 85% fatigue factor. Whether a person should be engaged as an employee or as a contractor is a legal question for your adviser — the cost model only compares the arrangements you are allowed to choose.

Apply gates before a recommendation

Apply gates before a recommendation: required capacity, minimum cash and any management constraint. If no option passes all gates, show that result instead of selecting the least bad card as "recommended." Hiring Cost, Ramp-Up & Capacity Lab makes the cost, capacity and timing assumptions inspectable. Use the fictional demo to compare all options week by week.

Worked numbers at a glance

Common mistakes checklist

• Wage only, no burden or benefits.
• The same benefit entered in the burden rate and again as a weekly cost.
• Full output from day one; training counted as productive time.
• Mentor time ignored.
• Capacity counted as sales even when demand is lower.
• Setup cost spread through the year instead of paid on its date.
• Break-even volume confused with recovering the setup cost.
• No cash floor, or no no-hire baseline to compare against.

Limitations

This method uses the rates, benefits and productivity figures you enter. It does not calculate payroll tax, decide worker classification or replace payroll software or professional advice. It is decision support that makes your assumptions comparable and visible.

Try the fictional demo of Hiring Cost, Ramp-Up & Capacity Lab, plan the absences of the people you already have with the Leave Balance & Coverage Planner, and turn approved hours into pay records with Shift-to-Pay Control.

Explore the fictional demo · See the full tool