Fixed operations — 'fixed ops' — is the part of a car dealership that services and repairs vehicles rather than selling them: the service department, the parts department and, where the store has one, the body shop.
NADA, the dealer association whose data tracks the industry, counts those three as the dealership's fixed departments.
In 2025, U.S. franchised dealers wrote more than 276 million repair orders, and service and parts sales topped $164 billion.
What does fixed operations mean?
Car dealerships run two businesses under one roof.
Variable operations is the sales side of the store.
Fixed operations — 'fixed ops' — is the work that keeps vehicles on the road after the sale: mechanical service and repair, parts, and collision work.
The National Automobile Dealers Association's service-management materials draw the line explicitly.
NADA's guide names the service department, the parts department and the body shop as the dealership's fixed departments, and measures them as a group against the store's adjusted overhead.
The name marks the boundary: the fixed departments work on vehicles, and variable operations sell them.
In dealer reporting and dealer job titles the term keeps that meaning.
The titles above the department head — service director or fixed operations director — are used for running service, parts and body together.
The sales side of the store reports through its own titles.
Dealerships differ in what each title covers, and our research found no source that standardizes that ladder.
If you work in a dealership's service drive, parts counter or body shop, you already work in fixed operations, whether or not anyone at your store says the phrase.
The term matters because it is the unit dealerships manage and budget for: NADA's dealership reporting books service and parts as one line, and its fixed absorption measure scores the three fixed departments as a group against the store's adjusted overhead.
The scale behind the term is easy to underestimate.
NADA counted 16,990 franchised new light-vehicle dealerships in the United States in 2025, and dealerships across the group wrote more than 276 million repair orders in the year.
Which departments are fixed ops?
Three departments make up the fixed side of the store, and dealer accounting keeps a separate set of sales lines for each.
The service department turns wrench time into labor sales.
NADA's 2025 figures put dealership service labor sales at $75.81 billion, split across customer mechanical work ($31.48 billion), warranty work ($15.46 billion), internal work ($12.22 billion), sublet ($5.07 billion), customer body work ($4.63 billion) and other ($6.94 billion).
Customer-pay, warranty and internal work each post to their own sales line.
The parts department supplies the components that service and collision jobs consume.
Dealership parts sales totaled $93.42 billion in 2025, including $24.54 billion in wholesale sales, $24.21 billion supporting customer mechanical work, $16.67 billion for warranty work, $8.55 billion for internal work, $11.00 billion in other sales and $4.32 billion in counter sales.
The body shop handles collision repair and refinish, and it counts in the fixed-ops totals: NADA's service labor figures fold $4.63 billion of customer body work into that $75.81 billion labor total.
Where a store operates its own body shop, the department sits inside fixed operations alongside service and parts.
NADA's averages describe one store at this scale.
The average franchised dealership in 2025 booked $9,687,942 in service and parts sales, wrote 16,252 repair orders and employed 16 technicians including the body shop.
NADA's figures also put the average customer mechanical labor rate at $186 an hour for 2025 — what the department charges for labor, not what anyone in it is paid, and one store average is not a rate your own department has to match.
Fixed vs variable operations
Variable operations is the sales side of the store: in NADA's dealership report, new-vehicle and used-vehicle sales.
Fixed operations is service, parts and body.
Dealer accounting keeps the two apart.
The variable side books a vehicle deal; the fixed side books repair orders and parts invoices, one job at a time across the year.
NADA's 2025 figures size the two sides: new vehicles brought 54.9 percent of franchised dealership sales dollars, used vehicles 31.8 percent, and service and parts 13.3 percent.
Together the three lines account for all of the sales dollars in NADA's dealership report.
| Sales line | Share of 2025 dealership sales dollars |
|---|---|
| New vehicles (variable ops) | 54.9% |
| Used vehicles (variable ops) | 31.8% |
| Service and parts (fixed ops) | 13.3% |
Source: NADA Data, U.S. franchised new-car dealers, full-year 2025.
The lines also move differently.
NADA's midyear 2026 report recorded fixed operations revenue up 2.2 percent in the first half of 2026, even as repair order counts dipped slightly and total dealership revenue fell 0.9 percent.
One half-year is a data point rather than a pattern, but it is the kind of divergence the fixed-versus-variable split surfaces.
One caution before reading that 13.3 percent as a profit story: NADA Data reports sales dollars, not gross profit, so it publishes no fixed-ops share of dealership gross profit.
Sales mix and profit mix are different measurements, and this page returns to the profit question through the metric NADA's dealer materials use.
Why fixed ops drives dealer profit
The measure NADA's dealer materials use for what the fixed side contributes is fixed absorption.
NADA defines fixed absorption as the extent to which the fixed departments — service, parts and the body shop — cover the dealership's adjusted overhead, meaning total dealership expense minus the expenses tied directly to vehicle sales: commission, delivery and policy.
The arithmetic is NADA's as well: gross profit from the parts department, the service department and the body shop, divided by dealership overhead expense, gives the absorption percentage.
The more overhead those three departments cover, the less of it the vehicle sales side has to carry.
The targets dealers aim at are dated.
NADA's 2010 service-department guide records its NADA Academy guideline — built on the top 20 percent of dealers — recommending 75 percent absorption, with or without a body shop.
Its 20 Group guidelines recommend 100 percent, but their formula also counts used-vehicle gross, so that figure measures more than the three fixed departments.
Those are dealership guidelines from a 2010 guide, not measured results from any store.
The same guide shows the profit logic inside each department through gross-profit retention: its guideline figures have service holding 70 percent gross, parts 38 percent, and the body shop 65 percent on labor and 30 percent on paint and materials.
Those are again NADA's 2010 dealership guidelines — a look at how the dealer business models these departments, not current results from the market.
Absorption is one reason dealerships manage the three departments as one operation: NADA's measure scores service, parts and the body shop together against the store's adjusted overhead, and dealer reporting books service and parts as one line.
The people who produce those numbers are the careers in the next section.
Careers in fixed ops
Fixed operations carries a large share of dealership employment.
Franchised new-car dealerships employed 1,123,100 people in 2025, and NADA's position breakdown put technicians at 25.2 percent of those jobs, other service and parts employees at 23.7 percent, supervisors at 13.1 percent and salespeople at 17.9 percent.
In that breakdown, technicians and other service-and-parts employees are the two largest position groups named, each ahead of the sales floor.
The departments map to distinct careers.
At the service counter sits the service advisor; in the bays work technicians from general service through diagnostic, EV and master-level specialties.
Shop foremen and service managers run the floor and the department, the parts department staffs parts counter roles, and the body shop employs collision estimators, body technicians, painters, paint prep, frame and ADAS calibration technicians under collision repair management.
The leadership layer that runs all three departments together is where the fixed-ops title lives.
The service manager career guide covers the department-head role, including the fixed operations director and service director titles that sit above it, and shop ownership is the version of fixed operations where the departments are the whole business.
On the wrench and body side, the automotive technician career guide covers the line roles and their specialties, and the auto body technician career guide covers collision repair work.
Dealership service departments and body shops hire for these roles, and independent shops, chains and fleets hire similar skills under different titles.
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Career and industry information for people in shop and dealership work — not business, financial or legal advice. The NADA figures on this page are reported industry averages and dated dealer guidelines from 2010, not results or targets for any one store.