The Quote That Looked Fine Until the Job Closed
A shop quotes a job at $28 an hour for a machinist's time because that's the number on the paycheck. The job runs, the invoice goes out, and three weeks later the owner is staring at a margin that's four points thinner than it should be. Nothing went wrong on the floor — no scrap, no rework, no schedule slip. The job simply cost more to run than $28 an hour, because $28 an hour was never the real cost of that machinist's time. It was the wage. The burden — everything the shop pays to keep that person clocked in and productive — never made it into the quote.
This is one of the most common and least visible margin leaks in a small job shop, because the gap doesn't show up as an error. It shows up as a slow, cumulative underquote that repeats on every job using that labor rate until someone rebuilds the number from scratch. This article covers exactly what belongs in a labor burden rate, what doesn't, and how to build one from a shop's own payroll and overhead numbers instead of a guess carried over from last year's spreadsheet.
What a Labor Burden Rate in Manufacturing Actually Measures
A labor burden rate is the true hourly cost of employing someone, expressed as a load on top of their base wage. It answers a narrower question than "what do we pay this person" — it answers "what does it cost this shop, per hour of that person's productive time, to have them on payroll at all."
The distinction matters because base wage and true cost diverge fast. A shop quoting jobs off wage alone is quoting off a number that's missing payroll taxes, benefits, insurance, and the paid hours that never turn into billable work. Every one of those is a real cash outlay. None of them show up on the pay stub the way the hourly rate does, which is exactly why they're so easy to leave out of a quote.
Building a defensible labor burden rate manufacturing shops can actually stand behind at quote time means starting from payroll records and overhead accounts, not from a habit.
What Loads Into the Rate
A complete burden calculation pulls from a short, specific list. Leaving any one of these out understates the rate.
Statutory payroll costs. Employer-side Social Security and Medicare contributions, federal and state unemployment insurance, and any state-specific payroll taxes are a fixed percentage on top of wages, mandatory, and easy to source directly from payroll reports.
Workers' compensation insurance. Manufacturing work-comp rates vary by classification and claims history, and they load per hour of labor the same way taxes do. This is a real, shop-specific number — pull it from the current policy, not a rule of thumb from a different shop.
Health insurance and retirement contributions. Whatever the shop pays toward premiums or a 401(k) match is a cash cost per employee per year. Divide it across that employee's paid hours and it becomes an hourly load.
Paid non-productive time. This is the category shops most often underweight. Vacation, holidays, sick time, and any paid downtime the shop covers are hours the employee is paid but not producing. A machinist paid for 2,080 hours a year but only physically running jobs for a smaller portion of that time is burdened at a much higher rate per productive hour than the raw wage suggests.
Small tools, PPE, and training. Recurring costs tied directly to keeping a person equipped and current — safety gear, certifications, training time — belong in labor burden rather than general overhead, because they scale with headcount, not with square footage or machine count.
What does not belong here: rent, utilities, machine depreciation, and facility insurance. Those are real costs, but they load onto a machine or work-center rate, not a person. Mixing the two produces a rate that's neither an accurate labor number nor an accurate machine number — it's a blend that's hard to audit and harder to defend when a customer asks how a quote was built.
Building the Rate: A Worked Example
The mechanics are straightforward once the inputs are separated. This is an illustrative example for a representative shop — plug in real payroll and benefits numbers to get a real rate.
Start with annual base wage: $52,000 for a machinist. Add the annual cost of everything above — payroll taxes, workers' comp, health insurance contribution, and training — say that comes to $18,500 for this example. Total annual cost of employment: $70,500.
Now divide by productive hours, not paid hours. If the shop pays for 2,080 hours a year but the employee is out an average of 15 paid days for vacation and holidays (120 hours), productive hours available are 1,960. If unplanned downtime — waiting on material, machine issues, meetings — eats another 150 hours a year on average, productive hours drop to 1,810.
$70,500 ÷ 1,810 = roughly $39 an hour.
That's the labor burden rate — nearly $11 higher than the $28 hourly wage this example started with in the opening scenario, and the gap widens further once workers' comp and benefit costs run richer than this illustration assumes. Quoting off the wage instead of the burdened rate means underpricing every hour of that machinist's time by close to 40% before a single scrap part or schedule delay enters the picture.
The step-by-step version of this calculation, including how to source each input from payroll and benefits records, is covered in more detail at how to calculate burden rate.
Burden Rate vs. Machine Rate vs. Fully Burdened Shop Rate
These three numbers get confused constantly because they all load costs onto an hourly figure, but they're measuring different things.
- Labor burden rate — the true cost of a person's time, built the way described above.
- Machine rate — the cost of operating a specific piece of equipment for an hour: depreciation, power, maintenance, tooling wear, allocated facility overhead for that work center.
- Fully burdened shop rate — what actually gets quoted to a customer for an hour of a given operation, combining labor burden, machine rate, and a margin target.
A shop that only tracks one of the first two and calls it the "shop rate" is quoting with half the picture. A manual op that's labor-heavy and machine-light needs a rate dominated by labor burden. A lights-out CNC op running unattended overnight needs a rate dominated by machine cost, with labor burden playing a much smaller role. Collapsing these into one number for every operation in the shop guarantees some jobs are overquoted and others underquoted — and the underquoted ones are the ones that quietly erode margin. The distinction, and how to calculate each side separately, is worked through at machine rate vs. labor rate.
Where Overhead Allocation Fits In
Labor burden covers costs tied to the person. General overhead — rent, insurance on the building, administrative salaries, utilities — still has to land somewhere, and it doesn't belong buried inside a labor number either. It gets allocated across jobs using a method the shop can defend: per direct labor hour, per machine hour, or as a percentage of direct cost, depending on how the shop's cost structure actually behaves.
Getting this allocation wrong in either direction has the same effect as getting labor burden wrong: quotes stop reflecting what jobs actually cost to run, and the shop finds out at year-end instead of at quote time. The mechanics of choosing and applying an allocation method are covered at overhead allocation in manufacturing.
Turning a Burden Rate Into a Job-Costing Discipline
A correct burden rate is only useful if it's actually used — folded into the direct labor cost per hour that goes into every quote, and then checked against what jobs actually cost once they run. That comparison, actual hours logged on the floor against the hours a job was quoted at, is where a burden rate either proves itself or exposes a gap that needs fixing.
This is the layer WorkTickets is built for. Burden and machine-rate configuration per work center, rolled into a job-level profitability summary, is available starting on the Professional tier; actual-vs-quoted labor comparison per operation and per job is available on every tier, from Essentials up through Enterprise. It's a deliberately narrow tool — routing, traveler, clock-in, WIP, and cost comparison — not a scheduling system or an inventory platform, sitting below full ERP rather than trying to replace it. For a shop running QuickBooks and a spreadsheet today, that's the layer missing between "we think this job made money" and knowing it did.
For the full picture of how a burden rate connects to routing, standard time, and margin tracking across a shop, the job costing resource hub ties these pieces together, and the direct labor cost per hour calculation breakdown covers the wage side of this same math in more depth.
Building the Rate From Your Own Numbers
A labor burden rate built from a shop's actual payroll, benefits, and non-productive-time data is one of the highest-leverage numbers in job costing, because it corrects every quote that uses it, not just one job. Guessing it, or inheriting it from a prior owner or a generic industry rule of thumb, means every quote built on it carries the same error forward.
The Shop Rate & Burden Calculator lays out this exact calculation in a downloadable template — wage, statutory costs, benefits, non-productive time, and productive-hour math — so it can be built once from real numbers and reused for every rate the shop needs. It's available at the Shop Rate & Burden Calculator.
