Auto repair labor guide: flat rate vs actual time, and how to use one
A labor guide is a book or subscription that lists a standard time for each repair on each vehicle, say 1.8 hours for front brake pads on one model. Flat rate bills that guide time times your hourly rate, whatever the technician actually takes. Actual time bills the hours worked. Most independent shops quote from a guide and bill flat rate, and use actual time for diagnosis and anything the guide does not cover [1].
This guide explains what the labor guides are, how to quote from one, when guide time is wrong for your shop, how to handle a job that runs over, and how a customer can check a quote.
What a labor guide is
A labor guide lists a time for each repair operation, usually in tenths of an hour, by year, make, model and engine. The two best known in shops are Mitchell 1 and ALLDATA, and MOTOR also publishes estimating times; the publishers update them as new models come out [1]. Mitchell 1 describes its times as reflecting the recommended procedures and an average trained technician using factory-recommended tools [2]. Access is by subscription, and many shops reach a guide through their shop management software.
The times are a benchmark, not a law. Different publishers do not always agree for the same job (shop forums are full of this), and a publisher's time for a rusted car is the same as for a clean one. That gap between the guide and your bay is where most pricing arguments start.
Flat rate, actual time and hybrids
| Method | How the customer is billed | Good for | Watch out for |
|---|---|---|---|
| Flat rate (guide time) | Guide hours × your rate | Routine repairs: brakes, belts, batteries, water pumps | A seized part that takes twice as long is your loss |
| Actual time | Hours the tech worked × your rate | Diagnosis, electrical faults, custom or old-car work | Customer fears an open-ended bill; slow techs cost the customer more |
| Hybrid | Guide time for the known job; actual time for the extras | Most general shops | Needs a clear note on the estimate about what counts as extra |
| Flat price | One price for a defined job (oil change, inspection) | Menu items you do all week | Price must be reviewed when parts costs move |
Many shops use guide time for the repair and actual time for diagnosis. Whichever you choose, write it on the estimate and your website so the customer reads the same thing at drop-off and at pickup.
How to quote a job from a guide
- Find the job for the exact vehicle. Year, engine and trim change times. A brake job with rear drums is not a brake job with rear discs.
- Read what the time includes. Check whether it already includes related steps (bleeding the brakes, removing a bumper) and which steps are listed separately.
- Add the overlap right. If two jobs share steps, such as a water pump and a timing belt, the guide lists an overlap deduction or a combined time. Charge the shared labor once and tell the customer you did; it is a reason to choose you.
- Multiply by your rate. Example: 2.4 guide hours × $140 = $336 of labor. Our labor rate calculator shows how to set the $140.
- Add parts at your matrix price and any fees you disclose (see shop fees in auto repair).
- Write the estimate, including the labor hours or labor price per job, and get the approval recorded before you start.
When guide time is wrong for your shop
- Rust and age. Guides assume a normal car. A snapped exhaust stud or seized caliper bolt can double a job. Charge for the real time on rusty cars where the extra is plainly caused by the car, and say so in the estimate: "Guide time 1.8 hours. Cars with heavy rust may take longer; we will call before going over."
- Modified or high-mileage cars. Aftermarket parts and old repairs hide surprises.
- New technicians. A tech who takes twice the guide time is a training cost, not a customer cost.
- Scan tool and software work. Programming, calibration and module setup may be listed in the guide, or may not. If it is not, bill your own set time or actual time and write it on the estimate.
- Diagnosis. Guides cover repairs, not finding the fault. See what to charge for diagnosis.
- Guide times that are too generous. If your techs beat the guide on most jobs, your effective hourly rate is higher than posted. That is fine, as long as the customer's price is the guide price.
What to do when a job runs over
- Stop at the surprise. Don't keep going until the bill is large.
- Take a photo of the broken part, rusted fastener or leak.
- Call the customer with the new price and the reason. One call, one number, one deadline.
- Record the answer on the repair order: the time, the name and what they approved. Some states require a revised estimate and a new authorization; California does, for example [3]. Check your state.
- If they say no, put it back together and bill for what you did, as your estimate said you would.
If you go over without a call and the customer complains, you will usually end up eating the difference, and a customer who feels surprised tells their friends and writes a review.
Paying technicians flat rate
Many shops pay technicians by the guide hour they bill ("flat rate pay") rather than by clock hour. It rewards speed and puts the risk of a seized bolt on the tech. It also tempts techs to rush, skip checks or pick easy jobs. If you use it, pay a guarantee for waiting time, pay comebacks fairly, and make sure quality and time spent on diagnostics are not punished. For a two-tech shop, a clock-hour wage plus a bonus for billed hours is often simpler. Whichever you choose, keep your costing honest: your labor rate (see the calculator guide) is based on billed hours, not guide hours your techs beat.
How a customer can check a quote
If you are on the customer side, you can sense-check a repair quote in three steps:
- Ask what labor time the shop is using and which guide it comes from.
- Ask the shop's hourly rate (or compare it with local rates; see auto repair labor rates by state).
- Multiply the two and compare with the labor line.
A shop that answers calmly and shows the numbers is a good sign. One that cannot say how it got the labor price is a warning. A shop that welcomes the question gets the customer. Put your method on your website: "We quote from the industry labor guide and call before going over" is a line that sells.
Show your method on your website
A short "How we price" section on your homepage or services page answers the question every caller has. Say your hourly rate, whether you quote from a guide, how diagnosis is billed, and how you handle surprises. Our guide to auto repair shop website design shows where it goes. If you want it built from what you already publish, email us your shop name and we will make a free preview.
A worked example: one brake job, three ways
A customer wants front pads and rotors. The guide lists 1.8 hours, and the shop's rate is $140.
| Method | Labor on the estimate | If the tech takes 1.3 hours | If rust makes it 3 hours |
|---|---|---|---|
| Flat rate | 1.8 × $140 = $252 | Customer pays $252; shop's effective rate is about $194 an hour | Customer pays $252 unless approved extra; shop's effective rate is $84 an hour |
| Actual time | Estimate only, about $252 | 1.3 × $140 = $182 | 3 × $140 = $420, after a call and approval |
| Hybrid | 1.8 hours guide time, extra on approval | $252 | $252, then a call: "rust added 1.2 hours, $168 more" |
The flat rate row shows why shops like it and why they fear it: the fast job pays more than the posted rate and the rusty one pays less. Over a year the two roughly cancel only if you quote honestly. The hybrid row keeps the customer's price predictable and gives you a fair way to be paid for the rare ugly job.
Mistakes to avoid
- Billing guide time with no note on the estimate. Customers assume the clock.
- Ignoring overlap. A customer who finds two charges for the same removal will not come back.
- Assuming all guides agree. Pick one as your standard and stick to it.
- Using guide time on diagnostics. There is nothing in the book for an intermittent fault.
- Letting jobs run over without a call.
- Never comparing guide time to real time. If a job always runs over, change the time you quote, not just the complaint.
FAQ
What is a flat rate labor guide?
A list of standard times for repairs, by vehicle. The shop bills the listed time times its hourly rate, not the time the tech actually spends.
Which labor guide do most shops use?
Mitchell 1 and ALLDATA are the two most widely used, and MOTOR publishes times too [1]. Many shops get theirs through shop management software.
Is flat rate fair to the customer?
It is predictable: the price is known before the work starts, and a slow tech does not cost the customer more. It is fair if the shop quotes honestly and explains any extra.
Can a shop charge more than the guide says?
Yes, if the customer approves a revised estimate first. Many states require the new authorization.
Do labor guides include diagnosis?
Generally no. Diagnosis is billed separately by actual time or a set fee.
Is there a free labor guide?
The main guides are subscriptions. Free lists online often lack accuracy by engine and trim, so use them only as a rough check.
Ready to show your prices and services clearly online? Ask us for a free homepage preview. More guides are on the auto repair guides page.
Sources
- WickedFile, "Mechanic labor time guide". https://www.wickedfile.com/blogs/mechanic-labor-time-guide/
- Mitchell 1, Labor Times FAQs (excerpt). https://www.scribd.com/document/580422014/Mitchell1-LaborTimes-FAQs
- California Bureau of Automotive Repair, "Write It Right". https://bar.ca.gov/wir