Car Repair EstimatorLabor time guides and book time explained
Updated 2026-09-29 · By the Car Repair Estimator team
A labor time guide lists how many hours a given repair should take on a given vehicle. Shops multiply that book time by their hourly rate to price the job. Here is how the guides work, who publishes them, how warranty time differs from customer-pay time, and where book time falls short.
What a labor time guide is
A labor time guide is a database, or historically a thick printed book, that lists repair operations by vehicle and assigns each one a time in hours and tenths. An entry reads something like "Pads, front brake, renew, both sides: 1.0" for a specific model and year range (an illustration, not a real guide time). Shops multiply that time by their labor rate to price the job. The time in the guide is called book time, and billing by it is called flat rate.
The value of a guide is consistency. Two service writers quoting the same job get the same labor figure, the customer gets a price before work starts, and the shop has a published reference if the price is questioned.
Who publishes labor times
Mechanical and general repair
- ALLDATA provides labor times alongside repair information and parts prices. It lists warranty time and standard time, a skill level for each operation, and optional labor for extra work that commonly goes with a job.
- Mitchell 1 offers labor times, OEM parts pricing and parts diagrams in its ProDemand estimating tools.
- MOTOR Information Systems publishes labor time data, including the printed Labor Guide Manual, which includes mechanical skill ratings and labor operations unique to the aftermarket. Chilton-branded labor guide manuals are another long-running printed source.
Many shop management programs license one of these data sources, so you may be using one without buying it separately.
Collision
Collision estimates use the labor times built into the estimating system. The Database Enhancement Gateway names three primary US database providers: Audatex, Mitchell International, and CCC Information Services, which uses the MOTOR database. It says the databases take information from vehicle manufacturers and provide it as a guide for establishing flat rate times.
Warranty time vs standard time
Guides often show two different times for the same job. ALLDATA defines them this way:
- Warranty time: the manufacturer's warranty or factory rate, meaning the estimated time a factory-trained technician needs to repair a component still under warranty.
- Standard time: the flat rate, meaning the estimated time a non-factory-trained technician needs to repair an out-of-warranty component, as determined by independent labor time publishers.
Standard time is often higher, since it is meant to reflect older vehicles, independent-shop tooling and parts that have been in service for years. Customer-pay work is normally quoted from standard time. Warranty work paid by a manufacturer is paid at the manufacturer's time.
Book times change
Guide times are revised. MOTOR's 2014 Labor Guide Manual sheet, for example, highlighted dozens of operations whose times increased from the previous edition, some by more than an hour. Use a current edition or subscription and don't quote from an old printout.
Flat rate vs actual time
Flat rate bills book time no matter how long the job takes. It gives the customer a firm price and rewards efficient technicians; when the tech beats the time, the shop earns more per clock hour. When a bolt snaps, the shop absorbs it unless the estimate allows for extra time.
Actual time bills clock hours. It fits diagnosis, electrical troubleshooting, custom and restoration work, and anything the guide doesn't cover. Because the customer can't know the final price in advance, quote a range and a not-to-exceed amount, and get approval before going over.
Most shops use both: book time for routine operations, actual time for diagnosis and unusual jobs.
Where book time falls short
- Condition. The DEG reminds collision estimators that database times are based on new, undamaged parts being replaced on new, undamaged vehicles. Rust, seized fasteners, previous repairs and collision damage all add time.
- Included and not-included operations. A book time covers specific steps. Operations outside it, such as removing an accessory in the way, cleaning, corrosion protection or calibration, must be added separately. For collision work, the DEG points estimators to their system's procedure pages, plus industry references like the ASA included and not-included operations charts and the SCRS Guide to Complete Repair Planning.
- Overlap. When two operations share steps, such as removing the same bumper cover for two different repairs, guides often deduct the overlap. Check whether your system does it automatically.
- Body and refinish. Refinish time, blend and paint materials are separate from body labor. Leaving them out is one of the most common estimating misses.
Using book time with your rates
Book time times your hourly rate equals the labor price, so both numbers matter. If your rate doesn't cover your costs, accurate book time won't save the job. Use the labor rate calculator to check your rate, and set separate rates for body, refinish, frame and mechanical work.
Keep track of your own actual times on common jobs. If you consistently beat or miss book time on a particular operation, that tells you something about your pricing, tooling or training.
Putting times on an estimate
Each labor line on an estimate should name the operation, the hours and the rate, with body, refinish and mechanical labor separated. Our estimate template is laid out that way, and how to write an auto repair estimate walks through the full process. If you want an itemized first draft from a photo, Car Repair Estimator Repair+ lists body labor and refinish hours on separate lines at the hourly rates you set; review the hours against your own experience before sending, as you would with any estimate.
Frequently asked questions
What is book time in auto repair?
Book time is the number of hours a labor time guide assigns to a specific repair on a specific vehicle. The shop bills that time multiplied by its labor rate, whether the job actually takes more or less.
What labor guide do mechanics use?
Common sources include ALLDATA, Mitchell 1 and MOTOR, often built into shop software. Collision shops use the labor times in their estimating system, such as CCC, Mitchell or Audatex.
What is the difference between warranty time and standard time?
ALLDATA defines warranty time as the time a factory-trained technician needs to repair a component still under warranty, set by the manufacturer, and standard time as the flat rate a non-factory-trained technician needs on an out-of-warranty component, set by independent labor time publishers.
Is there a free labor time guide?
The major guides are paid subscriptions or come with shop software. Free online lists exist, but their sources and vehicle coverage vary, so check them against your own job history before quoting from them.
Sources
- ALLDATA - Looking up part prices and labor times
- MOTOR Information Systems - Labor Guide Manual (2014 edition sheet)
- Mitchell 1 - ProDemand estimating
- Database Enhancement Gateway - Know your estimating system
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