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The Fennec Lab

Trades operator economics

Auto Repair Operations Calculators

Operator economics for independent auto-repair shops: flat-rate-hour labor pricing, parts markup, bay throughput, and the required door-rate to cover cost-of-doing-business — cross-checked against BLS SOC 49-3023 wage data, RIA Industry Insights benchmarks, and the AAA shop-rate survey.

Anchored to: BLS SOC 49-3023; RIA Industry Insights; AAA shop-rate survey; 40 CFR 82

5 calculators live. Reviewed against current statute and regulation. Last updated 2026-05-16.

Most-used calculators

BLS SOC 49-3023 (Automotive Service Technicians and Mechanics

Auto Repair Shop Labor Rate Pricing Calculator

Screen a defensible door rate per flat-rate hour for an independent automotive repair shop. Combines fully-loaded technician compensation, bay overhead, billable utilization (the bay-flag ratio, RIA-benchmarked 65-85% for independents and 95-110% for franchised dealerships), parts gross-profit subsidy (parts markup converted to margin and applied against the labor-cost recovery requirement), comeback / warranty drag, and a target net margin on total revenue (RIA convention) to produce a breakeven rate and a recommended door rate. Compares the result to AAA's national independent-shop door-rate band ($120-$180 in the 2024 survey). Reports the parts gross-profit contribution per labor hour, the comeback-cost drag per labor hour, and a position flag (below / within / above the AAA band). Tool, not advice — actual rate-setting must account for local labor market, fleet and wholesale account mix, brand positioning, and competitor rates in the trade area; tax outcomes (worker classification under 26 USC § 3121, sales-tax exposure on labor in NY, NJ, OH, PA and the other labor-taxing states) and EPA Section 609 MVAC certification (40 CFR Part 82) are flagged in the companion content but not separately computed.

Repair Industry Association (RIA) 'Industry Insights' bay-utilization benchmarks (independents 65-85%

Auto Repair Shop Bay Utilization Calculator

Bay-level revenue productivity analysis for an independent automotive repair shop. Computes current bay utilization (billable bay-hours divided by available bay-hours), revenue per bay-month, breakeven utilization given current ticket size and overhead, and an estimated queue burndown against the 3-working-day customer-satisfaction threshold. Returns a next-lever recommendation across five regimes: add a bay (high utilization + queue pressure), add a tech (target utilization with queue pressure suggests stall-and-go parallelization), add hours (moderate utilization with capacity flex available), grow demand (low utilization indicates demand is the binding constraint, not capacity), or hold (utilization matches target within tolerance). Benchmarks against RIA 'Industry Insights' (70-90% bay utilization band for independents, 95%+ for franchised dealerships), Auto Care Association / AAIA average RO ticket data ($425 independent average 2024), and ASA shop-management heuristics. Tool, not advice — capital decisions involving lease terms, permit timelines, tech-hiring pipeline, and customer-mix dynamics are not modeled.

BizBuySell quarterly Insight Report (small business transaction multiples by industry)

Auto Repair Shop Acquisition Valuation Calculator

Independent auto repair shop M&A valuation tool. Applies the size-tiered convention: Seller's Discretionary Earnings (SDE) multiples for sub-$1M cash flow shops (1.5-2.8x for sub-$500K SDE, 2.5-3.5x for $500K-$1M SDE), EBITDA multiples for $1M+ cash flow shops (3.5-5.5x for lower-middle-market independents). Adjusts the base multiple for customer concentration risk (high-risk discount 0.85x, low-risk premium 1.05x) and location class (Class A premium 1.10x, Class B baseline, Class C discount 0.85x). Adds real estate at separate market cap rate when included in the deal, plus equipment surplus value above the typical embedded baseline. Returns low / mid / high enterprise value range, total transaction value range, equity value at mid net of assumed debt, and effective multiple landed. Benchmarks against BizBuySell, IBBA, BVR Pratt's Stats / DealStats, and Generational Equity M&A data. Tool, not advice — actual transaction pricing depends on deal structure (asset vs stock), seller financing, working capital settlement, earnout, post-close consulting, lease assignment, and local market dynamics; engage an M&A broker, CPA, and transactional attorney for any acquisition.

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How these calculators are maintained

Every YMYL calculator is reviewed quarterly and after every legislative session in the jurisdiction it covers. Citations are link-validated monthly against the relevant statute and regulation websites. The methodology page documents the discipline.

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