The famous number and the number that decides

Revenue per employee is the most quoted metric when productivity comes up: one turnover, one headcount, one division. In the reference — 6,000,000 of revenue, 40 full-time equivalents — it makes 150,000 per employee: easy to compute, easy to compare, and used everywhere, from analyst reports to board decks.

But the famous number does not answer the question that matters: does this team pay for itself? For that you must divide what the labor generates — the gross margin, not the revenue — by what the labor costs. That is the labor efficiency ratio (LER): at the reference, 3,600,000 of margin over 2,000,000 of labor cost makes 1.80 — every unit spent on people returns 1.80 of margin.

This calculator gives both numbers, plus the one that turns analysis into decision: the hiring headroom — how many people the income statement has already financed against the efficiency target you declared.

Why revenue per person is not enough

RPE alone misleads in two ways. The first is the margin: a distributor with 500,000 of revenue per employee and a 12% margin generates 60,000 of value per head; a consulting firm with 180,000 of revenue per employee and an 85% margin generates 153,000. The famous number says the distributor is «more productive»; the income statement says the opposite.

The second is the cost: 150,000 of revenue per employee is excellent with salaries of 35,000 and insufficient with salaries of 90,000. RPE ignores the payroll — precisely the thing the company controls when it hires, promotes or opens an office in another country.

The LER corrects both distortions in a single division: gross margin over labor cost. It is dimensionless — valid in every currency, every industry, at every size — and that is why it is the right number for comparing branches, years and plans.

The same team, five revenues

The table holds the team fixed — 40 FTE, 2,000,000 of labor cost, 60% margin — and moves only the revenue flowing through it. The workforce is identical in every row: what changes is how much work finds it.

The LER column crosses every verdict zone without anyone hiring or firing: between 1.20 (survival) and 2.40 (excellence) there is only the revenue doubling over the same team — and already the step from 6 to 8 million, a third more, moves the index from 1.80 to 2.40. That is why productivity is judged over the cycle, not at an instant: the same team looks like a problem in the slow year and a miracle in the full one.

The table also carries the reverse warning: if revenue grows 33% and headcount grows 33%, the LER does not move a millimetre. Growing is not improving — it is only getting bigger at the same efficiency, with more complexity to manage.

How this calculator works

The annual revenue is the turnover of the last twelve months — an actual figure, not the budget. The gross margin is the percentage left after the direct costs of product or service: materials, resold goods, cloud and platform fees for software, subcontractors for services.

The headcount is in full-time equivalents, not heads: two 50% part-timers count as one. The annual labor cost is the full cost: gross pay plus employer contributions, benefits, bonuses and agency staff — everything that would disappear if the team disappeared.

The efficiency target is the LER you want to defend: the 1.5-2 band is the common reference for healthy companies, but every industry has its own threshold. From here come RPE, LER, margin per employee and the hiring headroom.

How to read the results

Revenue per employee serves the external comparison: with competitors, with industry benchmarks, with your own history. The gross margin per employee — 90,000 at the reference — is the honest version of the same number: how much value each person really generates, net of what the product costs.

The LER index is the verdict, with three thresholds: below 1 the labor consumes more value than it creates — every month of waiting widens the hole; between 1 and 1.5 the team pays for itself but the cushion is thin; between 1.5 and 2 there is balance: margin for the structure, the capital and the surprises; above 2 productivity is excellent — and the risk changes sign, from excessive cost to underinvestment.

The hiring headroom: the budget hidden in the income statement

The question «can we afford to hire?» almost always gets gut answers. The formula makes it arithmetic: at the declared LER target, the gross margin sustains a maximum labor cost of margin/target — and the difference with the current cost, divided by the average cost of one FTE, is the number of people already financed. At the reference, with a 1.5 target: room for 8.0 hires at the current average cost.

The negative sign is just as informative: the same company with a 2.0 target shows 4.0 FTE of excess against the ambition — not an order to fire, but the exact measure of the distance between the income statement you have and the one you want. Raising the target without a plan to close that distance is declaring a number, not managing it.

The correct use is in budgets: first set the LER target, then the hiring headroom says how many people the plan sustains — in the reverse order, the headcount grows with the hoped-for revenue and you discover the LER at year end, when it is late.

The desk neighbours

The denominator of this index has a dedicated calculator: the true cost of an employee builds the full cost of one person — gross pay, contributions, benefits, workstation — and it is the number to use here when the total labor cost is not at hand: average cost times the number of FTE.

The other neighbour is the span of control: the LER says whether the team pays for itself, the span says whether it is manageable. The two questions meet in the same meetings — every hire the margin finances is also a report someone must manage, and a plan that passes only one of the two exams is half a plan.

The healthy sequence for a growth plan: current LER (this page), hiring headroom at target, full cost of the people to add, span of the managers who will receive them. Four numbers, ten minutes, and the plan stops being a hope.

Where the numbers come from

The labor cost comes from the accounts (personnel cost) plus the items that often escape: agency staff and stable contractors, which sit elsewhere in the income statement but count fully in productivity. Excluding them inflates the LER exactly where it hurts most, in companies that outsource heavily.

The gross margin deserves the strictest definition available: for software, revenue minus cloud, platform fees and first-line support; for services, revenue minus subcontractors and reimbursable costs; for commerce, revenue minus cost of goods sold. A generous margin produces a flattering LER and wrong decisions.

The FTE come from HR data, with one choice to declare: founders and working partners count in the headcount even if they do not pay themselves a full salary — otherwise young companies benchmark against numbers they will never see again.

Limits of the estimate

The LER is an average, not a marginal: it says the team as a whole pays back 1.80 times, not that hire number 41 will return as much. For important plans it pays to estimate the incremental margin of the new position, not to apply the average of those already there.

The index ignores capital: a company can show an excellent LER because it replaced people with machines and software — the cost migrated from labor to depreciation, and the full judgement needs both lenses. And it ignores time: today's hires produce margin in six months, so in fast growth phases the current LER systematically understates the team.

A parametric estimate for information purposes: it supports budgets, comparisons between sites and hiring plans; it replaces neither profitability analysis by project nor individual evaluations, which have nothing to do with this page.

The target scale

The first table holds the reference company fixed — 3,600,000 of gross margin, 2,000,000 of labor cost, 50,000 per FTE — and moves only the declared ambition.

The middle row is the mirror: with a 1.8 target — the current index — the hiring headroom is exactly zero, because the company is already spending everything that ambition allows. Every target below the current index frees people, every target above questions them: between 1.5 and 2.0 lie twelve FTE of difference on the very same company.

That is why the target must be chosen first and in writing: declared afterwards, it magically adapts to the headcount that exists. The table makes the cost of every ambition visible in advance — and turns the «can we hire?» discussion from a gut negotiation into the reading of one row.

The average-cost scale

The second table holds revenue and margin fixed and moves the labor cost — that is, the seniority, the salary market, the country where you hire.

The table says one uncomfortable thing and one consoling one. The uncomfortable: 40% more average cost (from 50,000 to 70,000) takes the same company from balance to the yellow zone without anyone working worse — it is the mathematics of salary inflation, eroding the index one renewal at a time. The consoling: the higher average cost is sustainable, but only if it brings margin with it — the senior team that costs 40% more must generate 40% more, and when it does, the index does not even notice.

It is also the table of locations: the same function performed in a country costing 40,000 or in one costing 70,000 produces two distant indices at equal output — the honest international comparison corrects for cost, which is exactly what the LER does on its own.

The sliding index: salary inflation

The LER has a silent enemy that works every year: salaries grow by inertia — renewals, seniority steps, the market — while revenue grows only if someone makes it grow. A 10% increase in labor cost at flat revenue takes the reference from 1.80 to 1.64: no wrong decision, no hire, one year of ordinary administration — and a sixth of the cushion gone.

The defence is not freezing salaries (which has its own bill: turnover, and those who leave are rarely those who cost too much). It is matching the speeds: if the labor cost grows 10%, the index is defended only by revenue or margin growing as much — and the honest budget puts the two curves side by side, instead of discovering at year end that one was running and the other walking.

The calculation to redo at every important renewal: new labor cost, same revenue, new LER. Ten seconds that show how much margin the renewal consumes — and how much growth it takes to give it back.

The right benchmark: comparing with your own mirror

Published RPE benchmarks mix industries that have nothing in common: pure software runs at multiples of manufacturing's revenue per employee, which in turn doubles labour-intensive services — and none of the three is «better»: they have different cost structures. Comparing your RPE with the general average is like comparing your fever with the city's average temperature.

The comparison that informs is threefold: with yourself over time (this year's index against the last three — the direction matters more than the level), with direct competitors (same business model, same margin structure), and between your own units (branches, teams, product lines — where the dimensionless LER allows comparisons the absolute RPE falsifies).

The most useful version of the exercise is internal: compute the index per division and look at the distribution. Almost always one or two units sustain the others — and the conversation that follows is worth more than any purchased benchmark.

Automation and outsourcing: when the index must be read in pairs

Two strategies improve the LER without improving the company, and they must be recognized. Automation moves cost from labor to capital: fewer people, same output, higher index — but the machines' depreciation does not appear in the denominator, and the full judgement requires looking at the cost of capital too (for machines, the hourly rate is the twin calculator).

Outsourcing is sneakier: external contractors disappear from the labor cost and reappear in the direct costs, that is, inside a lower gross margin. The index can even worsen while the headcount «lightens» — and that is the honest signal: the contract changed, not the productivity. The clean rule is to count in the denominator all stable labor, internal or agency, and leave out only the truly variable work.

In both cases the right question is not «did the index rise?» but «did the margin per unit of total cost rise?» — the LER is the lens on labor, not the whole income statement.

Mistakes that distort the index

The first is the dream gross margin: forgetting cloud, platform fees, subcontractors or support inside the margin inflates the numerator exactly where the count should bite. The strict definition is half the value of the exercise.

The second is heads instead of FTE: part-timers and seasonals counted in full depress the RPE and confuse comparisons — and founders excluded from the headcount gift young companies numbers the future can only fall from. The third is the half labor cost: without contributions, benefits and agency staff, the index rises by as much as reality does not allow.

The fourth is the most strategic: using the average for the marginal decision. The team LER says whether the system works; the single hire must be judged on the margin it will add, not on the margin the colleagues already generate. The two questions share a numerator and have different answers — and confusing them is the most elegant way to hire at a loss with an excellent index.

Frequently asked questions

What is revenue per employee (RPE)?

It is the annual revenue divided by the headcount in full-time equivalents: in the reference, 6,000,000 over 40 FTE = 150,000 per employee. It is the most used productivity metric for comparing companies, but alone it does not say whether the team pays for itself.

What is the labor efficiency ratio (LER)?

It is the gross margin divided by the total labor cost: how many times the team pays back its own payroll. At the reference, 3,600,000 of margin over 2,000,000 of labor cost = 1.80. It is dimensionless: valid in every currency and industry.

Why is the LER more reliable than RPE?

Because it corrects the two distortions of revenue per person: the margin (500,000 of revenue at 12% generates less value than 180,000 at 85%) and the labor cost (150,000 of RPE is excellent with 35,000 salaries, insufficient with 90,000 salaries).

Which LER thresholds does the verdict use?

Below 1 the gross margin does not cover the labor cost; between 1 and 1.5 the team pays for itself with a thin cushion; between 1.5 and 2 there is balance; from 2 up productivity is excellent and the risk becomes underinvestment. The 1.5-2 band is the common reference for healthy companies.

What goes into the labor cost?

The full cost: gross pay, employer contributions, benefits, bonuses, plus agency staff and stable contractors — everything that would disappear if the team disappeared. Excluding externals inflates the index precisely in companies that outsource heavily.

How do I count the headcount?

In full-time equivalents (FTE), not heads: two 50% part-timers count as one. Founders and working partners should be included even if they do not draw a full salary, otherwise the comparison with the future will always be merciless.

What is the hiring headroom?

The number of people the income statement has already financed against your LER target: gross margin divided by the target gives the sustainable labor cost, and the difference with the current cost divided by the average cost of one FTE gives the possible hires. At the reference, with a 1.5 target: 8.0 FTE.

What does a negative hiring headroom mean?

That against the declared target the current headcount is in excess: the same reference company with a 2.0 target shows 4.0 FTE above. It is not an order to fire — it is the measure of the distance between the current income statement and the ambition, to be closed with more margin or more revenue.

Which gross margin should I use?

The strictest definition available: for software, revenue minus cloud, platform fees and first-line support; for services, minus subcontractors and reimbursable costs; for commerce, minus the cost of goods sold. A generous margin produces a flattering index and wrong decisions.

Why does the calculator show no currency?

Because the mathematics is identical in every country: enter revenue and costs in your currency and RPE and margin per employee come out in the same unit, while the LER is a pure number comparable across branches, industries and countries.

Does the LER apply to a single hire?

No: it is a team average, not a marginal. It says the workforce as a whole pays back 1.80 times, not that the next position will return as much — for important decisions estimate the incremental margin of the new role.

Is a high LER always good news?

Almost: above 2 the risk changes sign and becomes underinvestment — a stretched team, key skills concentrated in few people, growth postponed. The hiring headroom quantifies exactly how much capacity the income statement would allow to add.

Updated July 2026