Fixed operations is the service department, the parts counter, and the body shop. At the average franchised dealership, it accounts for only about 10%-15% of total sales but roughly half of total gross profit (Mercer Capital, NADA via Edmunds). As new-vehicle margins compressed through 2024, fixed ops became the primary stability engine for most stores. The GMs who treat it that way are widening their lead. The ones who still treat it as the back of the house are quietly losing.
Key takeaways
Fixed operations has quietly become the most important conversation in most dealerships. For decades GMs talked about the service drive as the back of the house, the part of the business that paid the electric bill while the sales floor did the real work. That framing is dead. New-vehicle margins compressed by a third in 2024 alone (Presidio-NCM).[3] Meanwhile, the service bay kept producing predictable, high-margin work, and for the best-run stores it held the whole P&L together.
This guide covers what fixed ops actually is, why it now matters more than the showroom, how to benchmark your department, and the six strategies that separate the stores that crush fixed ops from the ones still stuck in 2015.
Every franchised dealership has two revenue engines. The variable side (new and used vehicle sales, plus F&I) generates big revenue per transaction but razor-thin margins. The fixed side (service, parts, collision) generates smaller transactions but fat, repeatable gross profit, month after month.
For a GM, fixed ops is the stability engine. Run it well and parts-plus-service gross profit covers most of the dealership's total overhead. That's the point of the fixed absorption metric, which measures what percentage of total dealership expenses are covered by fixed ops gross profit alone. NADA's published target is 115%, meaning fixed ops covers every dollar of overhead plus a 15% cushion. When that's the reality, every new vehicle you sell contributes pure incremental profit to the bottom line.
The two sides of the dealership look like they should be competitors. They aren't. They're symbiotic. A great sales process feeds the service lane with customers. A great service experience sells the next car. The dealerships that see them as one system outperform the ones that run them as separate fiefdoms.
| Variable operations | Fixed operations | |
|---|---|---|
| What it is | The sales floor. New, used, F&I. | Service, parts counter, collision. |
| Goal | Customer acquisition. Fast, transactional, exciting. | Customer retention. Steady, relationship-driven. |
| Margin profile | High revenue, thin margins. | Lower revenue per transaction, fat margins. |
| 2024 benchmark (per unit) | $2,247 average gross profit per new vehicle, down 33% YoY (Presidio-NCM)[3] | $222 CP gross profit per repair order, up 12% YoY (Optimum Q4 2024)[2] |
| Share of total sales | ~85%-90% of dealership sales | 10%-15% of total sales (Mercer Capital)[5] |
| Share of gross profit | ~50% of gross | ~50% of gross profit (NADA via Edmunds)[1] |
| Inventory cost | Floor-plan financed. Holding cost ~$44.63/unit/day (NextGear Capital)[6] | Parts inventory paid in cash. Benchmark: 45-60 days supply (Eide Bailly)[7] |
| Economic sensitivity | Very high. Moves with incentives, inventory, interest rates, and consumer confidence. | Low. Cars need maintenance regardless of what the economy does. |
One number makes the relationship impossible to ignore. The average franchised dealership's monthly floor-plan interest expense hit roughly $70,000 in 2024, an 800% increase from pre-pandemic levels (Wards Auto).[8] That's $70,000 a month in interest expense, before you've sold a single car. Fixed ops is what pays for it.
Three things shifted between 2022 and 2024 that permanently changed the math of running a dealership.
Presidio-NCM reports the average franchised store saw gross profit per new vehicle drop 33% in 2024 to $2,247 (Presidio-NCM 2024).[3] The pandemic-era windfall is over. Dealers who built their P&L assuming $4,000+ per unit in gross are now running on $2,200, and the break-even is a lot less forgiving.
Over the same stretch, service absorption at the average dealership rose from 65.3% to 66.3% (Optimum Q4 2024).[2] Customer-pay gross profit per RO rose 12%, from $199 to $222. When the front of the store was losing ground, the back was quietly making it up.
The average service customer now texts before they call, expects a video inspection, and wants to pay from their phone before they come pick up the car. The dealerships that adapted to this in 2023 are the ones with rising CSI and repeat visits in 2026. The ones still running on phone tag are bleeding customers to aggregator platforms and independent shops.
Fixed ops stopped being the back of the house. At the average store it's now the primary driver of profitability, and because service customers are the most reliable next-vehicle buyers, it's also the single best investment in variable-side sales. Cox Automotive research shows customers who service where they bought their car are dramatically more likely to return for their next purchase compared with customers who service at independent shops (Cox Automotive, 2018).[4]
If you want to defend or grow your fixed ops department, you have to know the numbers. Here are the targets NADA and the major industry analysts use, along with where the average store actually lands today.
| Metric | NADA / industry target | 2024 average |
|---|---|---|
| Service absorption | 115%+ (NADA Slide Guide)[9] | 66.3% (Optimum Q4 2024)[2] |
| Total service department gross % of sales | 72%+ (NADA)[9] | Varies by brand and volume |
| Parts gross % of sales | 40% (NADA)[9] | 30%-35% for blended retail, warranty, internal (Eide Bailly)[7] |
| Parts inventory days supply | 45-60 days (Eide Bailly)[7] | Varies |
| Parts first-time fill rate (off the shelf) | 90% (NADA)[9] | Varies |
| Tech productivity | 100%+ (NADA)[9] | Varies |
| Tech proficiency (efficiency) | 125% (NADA)[9] | Varies |
| Labor gross margin | 72%-75% target (DealerPRO)[10] | Below target at most stores |
| CP gross profit per RO | Rising | $222 Q4 2024, up 12% YoY (Optimum)[2] |
If you don't know these numbers for your own store today, that's the first thing to fix. You can't manage what you can't see.
Before any strategy matters, you need a foundation. The dealerships that consistently outperform in fixed ops all get the same three things right: their people, their process, and their parts.
Good techs are scarce. Great service advisors are scarcer. The store that figures out retention first wins the decade.
"That's how we've always done it" is the most expensive phrase in the dealership world. You have to know your numbers cold, and you have to remove the bottlenecks that slow down the shop.
Every part on your shelf is cash you can't use. The parts department is one of the most underappreciated profit centers in the dealership, and also one of the most commonly mismanaged.
Once the foundation is solid, this is where you pour fuel on the fire. Every one of these strategies is available to every dealership in North America right now. The ones who've implemented them are outperforming the ones who haven't by double digits.
Your service lane is a goldmine, but you can't dig for gold with a plastic spoon. Modern customers expect a digital experience: online booking, text updates, video inspections, mobile payment. If you're still running on phone calls and paper ROs, you're falling behind fast.
This is where a Dealership Engagement System (DES) like Kimoby becomes the layer that ties everything together. The DES sits between your DMS and the customer, digitizing every touchpoint: reminders, updates, video, estimates, payment, follow-up. It doesn't replace the DMS. It makes the DMS useful in front of the customer.
The single biggest bottleneck in most service departments isn't technical capacity. It's communication. Phone tag kills ROs. It's time to improve dealership customer communication on the customer's terms, not the advisor's.
A great customer experience is impossible without a smooth internal workflow. Chaos in the shop turns into delays in the drive.
The final step of service should be frictionless. If a customer has to wait in a cashier line to pay, you're ending a great experience on a sour note, and you're creating the end-of-day bottleneck that clogs up the drive.
Your job isn't done when the car leaves the drive. The follow-up is where you build the loyalty that turns a service customer into the next vehicle sale.
You can't manage what you don't measure, and gut feelings don't cut it anymore. The dealerships that win in fixed ops are the ones treating it like a data-driven operation, not a reactive one.
Fixed operations is the service department, the parts counter, and the body shop. It's called "fixed" because its revenue is stable and predictable: customers need maintenance regardless of what the economy or new-vehicle market is doing. At the average franchised dealership, fixed ops generates roughly 50% of total gross profit on only 10%-15% of total sales.
Three reasons. First, it pays the bills: the NADA target is 115% fixed absorption, meaning parts and service gross profit covers every dollar of overhead plus a 15% cushion. Second, it's the biggest retention lever a dealership has. Customers who service where they bought their car are significantly more likely to come back for their next purchase. Third, fixed ops margins held up through the 2024 new-vehicle margin collapse. New-vehicle gross dropped 33% while customer-pay gross per RO climbed 12%.
Variable ops is the sales and finance side of the dealership: high revenue per transaction, thin margins, very sensitive to market conditions. Fixed ops is service and parts: lower revenue per transaction, fat margins, stable across economic cycles. Variable ops runs on floor-plan interest and hopes. Fixed ops runs on repeatable customer relationships.
People, process, and parts. People means hiring, paying, and retaining good techs and advisors. Process means knowing your KPIs (ELR, HPRO, tech efficiency, tech proficiency) and removing the internal bottlenecks that slow down the shop. Parts means managing inventory like a bank, obsessing over fill rate, killing obsolete stock, and using tires as a retention tool, not a commodity.
Digital tools, especially a Dealership Engagement System like Kimoby, automate the communication tasks that eat advisor time and kill ROs. Automated reminders cut no-shows. Video MPI gets faster approvals. Text-to-pay eliminates the cashier line. Automated campaigns bring customers back. Each of those alone is worth the price of admission. Together, they transform the economics of the service drive.
Speed and trust. Text is how customers want to communicate, and two-way texting eliminates phone tag. Video turns "you need $1,200 in work" into "here's the leaking gasket, you can see it." Customers approve faster when they can see what's wrong, and advisors stop spending hours chasing people down for yes-or-no answers.
The Dealership Engagement System (DES) that ties your service lane together: texting, video MPI, mobile payments, loaner management, and targeted campaigns, all integrated with your DMS.