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Effective labor rate calculator for auto repair shops

Your posted labor rate is what you ask. Your effective labor rate (ELR) is what you actually get. Put in your own numbers to see the gap, what closing it is worth per month and year, and your tech efficiency and productivity. The starting values are only an example.

From Sal

You set a rate. You post it. You stand behind it.
And then the month ends, and the math whispers a smaller number.

Not because anybody did anything wrong. A discount here. A diag you ate there. A comeback.
Let's find out how big that whisper is. Grab last month's numbers from your shop software. I'll wait.

My numbers below cover Posted labor rate ($ per hour)The rate on your wall or in your software Labor sales ($)Labor dollars only: no parts, sublet, fees or tax Labor hours billed (flagged)Hours on your invoices for the same period Tech hours clocked on jobs (optional)From your job clock. Needed for efficiency Tech hours paid (on shift) (optional)Hours your techs were paid or clocked in. Needed for productivity Share of the gap you'd close (%)100% = the full gap. Try a smaller, realistic share too

Your numbers

Effective labor rate–

Gap vs posted rate–

Gap as % of posted rate–

Gap worth per month–

Gap worth per year–

If you closed 100% of the gap–

Tech efficiency–

Productivity–

Proficiency (billed ÷ paid)–

Labor $ per paid tech hour–

The math

Enter your numbers to see the math.

Example values: $150 posted, $36,000 labor sales and 300 billed hours give an ELR of $120/hr, a $30/hr (20%) gap, worth $9,000 a month or $108,000 a year at full posted rate.

How each number is calculated

Effective labor rate (ELR)

ELR = labor sales ÷ labor hours billed

What you actually brought in per hour you billed. Use labor dollars only (no parts, sublet, fees or tax) and the hours on your invoices, not clock hours.^[1]^[2]

The gap

Gap = posted rate − ELR · Gap % = gap ÷ posted rate

How far below the number on your wall you're really selling, in dollars per hour and as a percent.

What the gap is worth

Worth per month = gap × hours billed per month · per year = × 12

What the same billed hours would have brought in at your posted rate. It's the ceiling, not a promise: some of it is work you priced low on purpose.

Technician efficiency

Efficiency = hours billed ÷ hours clocked on jobs

How the work got done compared with the billed (book) time. Over 100% means jobs got done faster than the time billed.^[3]^[4]

Productivity

Productivity = hours clocked on jobs ÷ hours paid (on shift)

How much of the paid day techs spent working on cars. Waiting on parts, approvals or the next job pulls it down.^[4]^[5]

Proficiency and labor $ per paid hour

Proficiency = hours billed ÷ hours paid · Labor $ per paid hour = labor sales ÷ hours paid

Proficiency is productivity × efficiency rolled into one.^[5] Labor dollars per paid tech hour is the "labor production" check Joe Marconi suggests running before you raise your rate.^[6]

Names vary: some shops and reports call billed ÷ paid "productivity." Check which hours a number uses before you compare it to anything.^[5]

Where the gap usually comes from

Discounts that come off labor. The hours stay the same, the labor dollars shrink, and ELR drops.^[1]^[2]
Work mix. Competitive services like oil changes often run a much lower effective rate than diagnostic or major repair work, so your blend depends on what you sell.^[1]
Diag time you ate when the customer didn't approve the repair, and comebacks you didn't rebill.^[2]
Bundled jobs with overlapping labor, like an oil change plus a rotation billed as if they were two separate trips up the lift.^[1]

There's no single "right" ELR. We don't publish a target, because a fair one depends on your work mix. Track your own number every month and watch which way it moves.

Close the gap

Better estimates start in your shop software

Canned jobs, a built-in labor guide and labor-rate reports make it harder for hours to slip through. Compare which systems include a labor guide, and on which plan, before you pay for one.

Compare shop software

GuideBest shop software for 1-3 bay shops Head to headTekmetric vs AutoLeap Free kitShop Software Switching Kit Free quotesGet demos from 2-3 systems