What One Unit Actually Costs You
Your real unit cost is loaded cost divided by what you actually delivered. Almost nobody calculates the second number.
Summary
- The real cost of a unit is loaded cost divided by the units actually delivered, not salary divided by available hours or input price divided by input issued.
- Build it in three layers: direct inputs adjusted for yield, direct effort at loaded cost, and directly attributable capacity. Keep shared overhead separate.
- Yield loss exists in every business. In services it is utilisation: a firm at 55% realised utilisation is losing 45% of the hours it pays for.
- Seven items are routinely left out, from setup and changeover to energy at the real rate. Check the build by multiplying unit costs by volumes and comparing the total with cost of delivery in the P&L.
A services firm quotes ₹4,800 an hour. Their internal view of cost is a senior engineer on ₹18 lakh a year, roughly ₹900 an hour across 2,000 working hours. Healthy margin, they think.
Two corrections change the picture entirely.
Loaded cost, not salary. Add PF, gratuity provision, insurance, laptop and software, workspace, and the share of delivery management, HR and recruitment that this person consumes. ₹18 lakh becomes closer to ₹27 lakh.
And realised utilisation, not available hours. Of 2,000 hours, this engineer billed 1,150. The rest went to bench between projects, internal work, training, pre-sales support and leave.
So the real cost is ₹27 lakh ÷ 1,150 = ₹2,350 an hour, not ₹900.
One engineer, three views of what an hour costs
| View of cost | Cost per hour (₹) | Margin at ₹4,800 an hour |
|---|---|---|
| Salary ÷ available hours: ₹18,00,000 ÷ 2,000 | 900 | 81% |
| Loaded cost ÷ available hours: ₹27,00,000 ÷ 2,000 | 1,350 | 72% |
| Loaded cost ÷ billed hours: ₹27,00,000 ÷ 1,150 | 2,348 (about 2,350) | 51% |
The firm believed it kept ₹3,900 of every ₹4,800 hour, about 81%. It keeps ₹2,450, about 51%. In rupees that is 63% of what they thought they were making (₹2,450 ÷ ₹3,900). Every pricing decision, every discount approval and every fixed-price quote has been made against the wrong number. How a services firm builds that figure grade by grade is set out in costing an IT services business.
First, name your unit
Costing starts by deciding what one of the thing is.
The unit to cost, by business
| Business | The unit |
|---|---|
| SaaS | Account-month, or seat-month, or module |
| IT / tech services | Billable hour, or a defined deliverable |
| Hospitals | Procedure, bed-day, or package |
| Diagnostics | Test, or panel |
| D2C / ecommerce | SKU, plus the order that delivers it |
| Manufacturing | Unit or batch |
| Pharma | Batch, or pack |
| Semiconductors, robotics | Unit, plus amortised development |
Get this wrong and everything after is misdirected. A services firm costing per employee instead of per billable hour will never see its real economics. A D2C brand costing per SKU and ignoring the order will miss most of its cost.
Build the unit cost from the bottom, in three layers
Three layers, in this order.
- Direct inputs. What is consumed to produce one unit. Material for a manufacturer. Reagent and consumable for a test. Implant and drug for a procedure. Compute and third-party API for a software account. Time for a service.
- Direct effort. The people time, at loaded cost. Loaded means wages plus statutory, benefits, tooling, workspace and the directly attributable supervision. A ₹22,000 monthly wage is rarely a ₹22,000 monthly cost.
- Directly attributable capacity. The machine, the analyser, the theatre, the server, where it is used by this unit and can be measured.
Stop there. What you now have is the direct cost per unit, and it holds two different kinds of cost. The inputs in it are variable: per unit they do not move with volume, and they are the base of your floor. The salaried time and capacity in it are paid for whether or not they are used, so per unit they move with , exactly as ₹900 became ₹2,350 above. Keep them as a visible line of their own. They are what the rate card has to recover over a year. They should not set the price of a single job, and why unit cost moves with volume explains why.
Shared overhead comes next, separately, and should never be blended into this number silently. It is spread by apportionment. What a particular customer costs on top of the unit is a further question again, cost to serve.
Yield: the part everyone outside manufacturing misses
If you issue 100 units of input and get 94 usable units out, your real input cost is the rate divided by 0.94. That is about 6.4% higher than the bill of materials says.
Factories understand this because the loss is visible on the floor. Every other business has exactly the same effect and usually does not count it.
What yield loss looks like outside the factory
| Business | What yield loss actually is |
|---|---|
| IT / tech services | Bench time, non-billable hours, unbilled overruns, rework after client review |
| SaaS | Free trials and onboardings that consume engineering and infra and never convert; churned accounts whose implementation was never recovered |
| Diagnostics | Repeat tests, QC runs, calibration, reagent wasted on small batches, samples rejected |
| Hospitals | No-shows, cancelled theatre slots, denied and disallowed claims, readmissions under warranty |
| D2C | Return to origin, damaged returns that cannot be resold, failed deliveries |
| Manufacturing | Scrap, rejection, rework |
| Pharma, semiconductors | Batch rejection, die yield, where it is genuinely central |
The services version is the most consequential and the least recognised. A firm at 55% realised utilisation has a 45% yield loss and almost never describes it that way.
Utilisation is yield.
The engineer above billed 1,150 of 2,000 hours: 57.5% utilisation, a 42.5% yield loss. Divide the loaded ₹1,350 an hour by 0.575 and you arrive at the same ₹2,348, the same correction as dividing a material rate by 0.94.
Seven costs that usually go missing from the build
In rough order of how often we find them missing.
- Setup and changeover. Machine setup in a factory. Project mobilisation in services. Onboarding in SaaS. Theatre turnaround between cases. Fixed per instance, so it is far heavier per unit on small batches, short projects and low-volume specialties.
- Idle and downtime. Planned maintenance, system downtime, an analyser out of service, an empty theatre slot. You paid for the capacity whether or not it produced.
- Packaging and delivery of the unit. Physical packaging for goods. Report generation and delivery for diagnostics. Documentation and handover for services.
- Quality and verification. Inspection, QC, code review, clinical , claim scrubbing. Varies hugely by unit type and is almost always spread evenly.
- Holding cost. Material sitting before conversion. Work in progress on a project that has not been invoiced. Unbilled revenue in services. At 14% a year, 70 days of holding costs around 2.7% (14% × 70 ÷ 365).
- Write-offs. Obsolete stock, written-off receivables, unrecoverable unbilled time. If 1.5% is written off annually, roughly 1.5% belongs on the cost of what did get delivered.
- Energy and infrastructure at the real rate. Not the average on the bill, but the rate including demand charges and backup running. For analysers, servers and heavy machinery the gap is substantial.
A sanity check that catches most errors
Total your unit costs times volumes for the year and compare the result with your actual cost of delivery in the P&L.
If they are 15% apart, something is missing. It is usually yield, or an overhead pool that never got into the build.
Four decisions a correct unit cost changes
- Your line ranking. Units with high setup, low yield or heavy verification drop. Simple, high-volume, repeatable ones rise.
- Your minimum viable order. Once setup is in the number, a 50-unit order and a 500-unit order are visibly different costs. So is the price that makes the small one worth taking. Same for a three-week project against a six-month one.
- Your floor. A floor built on direct inputs alone is too low, which means you have been approving discounts you could not afford.
- And in services specifically, your rate card. The gap between rate card and realised rate is the single largest unexamined number in most Indian services firms.
Start with one unit. Direct inputs adjusted for yield, direct effort at loaded cost, attributable capacity. Then ask which of the seven omissions applies to you. An afternoon for the first one, and it teaches you most of what you need for the rest.
The Pricing Maturity Assessment shows whether your cost floor or your pricing is the weaker layer.
Frequently asked questions
How do you do a cost per unit calculation?
Decide what one unit is, then add three layers. The first is the direct inputs it consumes, adjusted for yield. The second is the direct people time at loaded cost. The third is any machine, analyser or server time used by that unit. Divide by units actually delivered, not units planned. Shared overhead is added separately afterwards, so it never hides inside the direct cost.
What goes into the loaded cost of an employee?
Salary plus statutory contributions such as PF, gratuity provision, insurance, equipment and software, workspace, and the share of supervision, HR and recruitment that person consumes. In the example above it takes ₹18 lakh of salary to about ₹27 lakh, one and a half times.
What is yield loss in a services business?
Hours paid for that are never billed: bench between projects, internal work, training, pre-sales and leave, plus overruns and rework nobody invoices. It is the same effect as scrap on a factory floor, and it is measured by realised utilisation.
Should shared overhead be included in unit cost?
Keep it out of the direct cost per unit, whose variable inputs are the base of a price floor. Add it as a separate, visible layer when you want full cost. Blending it in silently makes the floor look higher than it is and hides the overhead where nobody manages it.
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SRF Capital Studio
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