How to Price Diesel Repair Jobs So You Actually Make Money
Most independent diesel shops leave $80,000-$200,000 a year on the table because they price by feel. Pricing is math. Once you know your real cost-per-billed-hour, the right labor rate and parts markup fall out automatically.
Calculate your true cost per billed hour
Your "labor rate" should never be a number you saw at the shop down the street. It should be the math output of your overhead divided by your real billable hours.
- •Annual fixed overhead (rent, insurance, utilities, software): typically $80k-$200k
- •Tech fully-loaded cost (wage + payroll tax + benefits): $32-$58/hr
- •Tech productivity (billed hours / clocked hours): 55-75% in real shops
- •True cost per billed hour: usually $85-$140 before profit
- •Target labor rate: cost-per-billed-hour ÷ (1 - target margin). 40% margin is the floor.
Parts markup matrix
Single-percent markup ("everything is cost +35%") leaves money on cheap parts and prices you out of expensive ones. Use a tiered matrix.
- •Parts under $25: cost × 2.0-2.5x (small parts have hidden handling cost)
- •Parts $25-$100: cost × 1.65-1.85x
- •Parts $100-$500: cost × 1.40-1.55x
- •Parts $500-$2,000: cost × 1.25-1.35x
- •Parts over $2,000: cost × 1.15-1.20x + shop fee
- •Hazmat / EPA parts (DEF, coolant, oil): cost × 2.0-3.0x — handling cost is real
Shop supplies and fees
Shop supplies and fees are not optional. They're how you recover the consumables you don't line-item.
- •Shop supplies: 5-8% of labor line (capped at $35-$75)
- •Environmental fee: $4-$12 per RO
- •Hazmat disposal: pass-through cost + 50% handling
- •Mobile call-out fee: $150-$300 minimum
The fleet-discount trap
Fleets ask for discounts because every shop gives them. Most shops give too much.
- •Volume discount on labor: 5-10% MAX, only on guaranteed minimum monthly hours
- •Never discount parts — that's pure margin you can't recover
- •Net-30 fleets cost you 1.5% per month in cash-flow drag — price it in
- •Offer "preferred fleet" perks (priority scheduling, free DVIR) instead of price
Frequently asked
What's the right diesel shop labor rate in 2026?
$125-$185/hr in most U.S. markets, $200+/hr in major metros. The right rate for YOUR shop is whatever your cost-per-billed-hour math produces — usually 30-50% higher than what owners think it should be.
Should I list prices online?
List "starting at" prices for common services (PM, brake job, DOT inspection). Fleets and owner-operators both filter by transparency.
How much should I discount for fleet work?
No more than 10% on labor, never on parts, and only with a contract committing to minimum monthly hours. Most fleet "discounts" handed out informally lose the shop money.
What's the #1 pricing mistake?
Underestimating productive hours. Owners assume 80%+; real shops run 55-70%. That gap is why their labor rate is too low.
Recommended for this repair
Parts pros use for this job
- •OEM replacement parts
- •Maintenance fluids
- •Filters
Tools pros use
- •Mechanic tool set
- •OBD-II scanner
- •Jack stands
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