Tool · calculator
Effective labor rate calculator
Work out what an hour of shop time is worth after discounts and unbilled hours, then read the gap against the rate posted at your counter.
What you walk away with
- Outcome
- Your effective labor rate, the gap against your door rate, and what that gap cost you over the period.
- Time
- About 5 minutes
Effective labor rate is labor dollars billed divided by labor hours billed. It is what one hour of your shop's time brings in after the discounts come off and the unpaid hours go in. The calculator below returns yours, and it returns the gap against the rate posted at your counter.
Key takeaways
- The formula is labor dollars billed over labor hours billed.
- Discounts come out of the dollars. Comeback and unbilled hours go into the hours.
- Multiply the gap by your hours and you have what the drag cost you last month.
- Break-even math and pay-plan math both want the effective rate as their input.
Effective labor rate calculator
One period of labor. Put in what you billed and what came back off it.
The rate posted at the counter.
Labor hours invoiced over the period.
Coupons, fleet pricing, counter goodwill.
Time spent redoing work you already sold.
Warranty, courtesy checks, hours nobody wrote a line for.
The arithmetic
- Labor dollars
- $185.00 × 620 hrs − $3,400.00 = $111,300.00
- Labor hours
- 620 + 26 + 34 = 680 hrs
- Effective labor rate
- $111,300.00 ÷ 680 hrs = $163.68
- Gap
- $185.00 − $163.68 = $21.32 per hour
- Cost of the gap
- $185.00 × 680 hrs − $111,300.00 = $14,500.00
Comeback and unbilled hours belong in the denominator because the hour was worked and reached a repair order carrying nothing. A discount comes out of the numerator because the hour was still sold. Put a drag in the wrong place and the rate moves the wrong way.
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What is an effective labor rate?
It is the rate you got, measured after the fact, on hours that reached a repair order. Nothing about it is set in advance. The number falls out of closed invoices and out of time that reached a ticket.
Every other figure in a shop's finances wants this one as its input. When you work out how many hours a month cover the rent, the hours have to be valued at what they earned. Value them at the posted rate and the answer comes back cheerful and wrong.
Why is it lower than the door rate?
Discounting is the visible leak. A fleet rate, or fifty dollars knocked off at the counter to end an argument: the hour was sold and some of the money went back.
Comeback time is where more of it goes. When a technician spends four hours redoing a job the shop already invoiced, those four hours are gone at full cost with nothing arriving on the other side of them.
Then there is everything that carried hours and no charge. Courtesy checks. Diagnostic time nobody was willing to bill for. A wall sign carries none of this, which is why a shop can raise its posted rate twice in two years and watch the money stay where it was.
Connecticut makes that sign mandatory and says what goes on it. Every repair shop there has to post "the hourly charge for labor", along with any storage charge and any charge for a diagnosis. What gets posted is the rate before a dollar comes off, which is the number this calculation exists to check.
Where does each drag belong in the formula?
This is the part that gets done wrong on spreadsheets, so it is worth being exact about.
| What happened | Where it goes | Why |
|---|---|---|
| Labor discount given | Out of the dollars | The hour was sold; some of the money came back off |
| Comeback hours | Into the hours | The hour was worked and reached a ticket with no charge |
| Unbilled inspection time | Into the hours | Same reason. The bay was occupied |
| Parts discount given | Neither | This is a labor rate. Parts belong in parts margin |
| Technician's unpaid lunch | Neither | It never reached a repair order |
Put a discount into the hours side by converting it to hours at the door rate and the answer comes out close, then drifts as soon as your rate changes. Keep the two halves separate.
A month, worked all the way through
The calculator loads with a month at a small shop. Six hundred and twenty hours went out the door at a hundred and eighty-five dollars, which is $114,700 of labor before anything comes off. Then $3,400 of discount comes out of the dollars, leaving $111,300 invoiced. Twenty-six comeback hours and thirty-four unbilled hours go into the hours, taking 620 up to 680.
$111,300 divided by 680 hours is $163.68. The gap against the door rate is $21.32 an hour, or 11.5%. Across 680 hours, that gap is $14,500 the shop did not collect in a single month.
The dollar figure is the one that gets a decision out of a management meeting. Fourteen and a half thousand, in one month, on hours the shop already worked.
What do shops get wrong here?
Counting only invoiced hours. A shop that divides labor sales by the hours that appeared on invoices has computed its door rate back again with extra steps, because the unpaid hours were never in the denominator to begin with.
Mixing parts into it is the other common one. The federal tax guide for small business draws the same line between the two halves of a shop. Publication 334 has a business that sells merchandise figure a cost of goods sold, and lets a business where "the sale of merchandise is not an income-producing factor" skip that step, since for that one "your gross profit is the same as your net receipts". A shop is both kinds of business on the same ticket. That is the reason the labor half and the parts half get measured apart.
California's tax authority splits the same ticket and puts the split in front of the customer. Its guide for repair garages says "your charges for labor and services are not taxable" and tells a shop it "must list labor and service charges separately on your customer invoices". So the labor dollars this formula wants are already sitting in their own subtotal on every invoice you closed last month.
What do you do with the number once you have it?
Feed it into the two calculations that need it. Your break-even in billed hours has to use the effective rate, because break-even asks what an hour contributes once it is paid for. Pay plans want it too, which is why the technician efficiency calculator asks for it before pricing a point of efficiency.
Then go after whichever half of the formula moved. A labor matrix addresses the dollars. A comeback problem addresses the hours. The definition of the term itself is in the effective labor rate glossary entry, and the full pricing workflow that produces these hours sits in how an estimate gets priced.
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Questions shops ask
- What is the effective labor rate formula?
- Labor dollars billed divided by labor hours billed. Take the labor sales that reached invoices over a period, then divide by every labor hour that reached a repair order over that same period, paid or unpaid. The answer is what one hour of your shop's time is worth.
- Should comeback hours go in the calculation?
- Yes, in the denominator. A comeback hour was worked. It occupied a bay and reached a repair order carrying no charge. Leaving it out flatters the rate by pretending the hour never happened, which is why a shop with a comeback problem can post a healthy-looking rate and still lose money.
- Why is my effective rate under my door rate?
- Because every discount comes off the dollars and every unpaid hour goes into the hours, and the wall sign sees neither. A fleet rate, a coupon at the counter, a warranty job, a courtesy check: each one moves one half of the formula and leaves the posted number alone. Work out which half moved in your month before deciding what to do about it.
- Is a low effective labor rate always a pricing problem?
- No. A discount problem shows up in the dollars and a shop-floor problem shows up in the hours, so start by looking at which half of the formula moved. Raising the door rate on a shop that is giving away twenty hours a month to comebacks just raises the number nobody pays.
- How often should a shop measure this?
- Monthly, on the same closed-invoice period each time. Measuring one week gives you a number that swings on a single large ticket. Measuring a quarter smooths out the thing you were trying to see.
- Does the effective rate include parts?
- No. This is a labor number, so parts sales and parts gross profit stay out of both halves. A shop that mixes them in gets a figure that moves when parts pricing changes, which makes it useless for the pay-plan and capacity questions the rate is meant to answer.