Auto Glass Repair, Replacement & ADAS Calibration SBA 7(a) buy-vs-build cash-flow calculator
Stress-test building an auto glass repair, replacement & ADAS calibration from scratch against acquiring an existing cash-flowing resale using SBA 7(a) financing. Adjust startup CapEx, revenue, owner SDE margin, acquisition multiple, and loan terms to compare Year-1 ramp-up cash flow, Debt Service Coverage Ratio (DSCR), and 3-year cumulative owner take-home.
SBA 7(a) underwriting & payback takeaway:
At $1,050,000 revenue and 26% SDE margin ($273,000/yr pre-debt cash flow), buying an existing auto glass repair, replacement & ADAS calibration at 3.1× SDE ($846,300) generates $156,521/yr from Day 1 (2.34× DSCR), giving an immediate $94,424 Year-1 cash-flow advantage over building from scratch during a 8-month ramp-up. Once ramped in Year 2+, building from scratch ($210,000 CapEx) nets $244,097/yr (9.45× DSCR). By comparison, a 6% gross-sales franchise royalty on $1,050,000 revenue deducts $63,000/yr directly from owner cash flow.
Frequently asked questions about starting or buying an auto glass repair, replacement & ADAS calibration
How much does it cost to start an auto glass repair, replacement & ADAS calibration?
Starting an independent auto glass repair, replacement & ADAS calibration typically requires $110,000–$300,000 (1,800–3,500 sq ft calibration bay + 1–3 mobile glass service vans and static/dynamic ADAS target systems). The largest line-item startup expenses are Mobile Auto Glass Vans with Exterior Glass Racks & Setting Cranes ($45,000–$135,000), Static & Dynamic ADAS Camera/Radar Calibration System & Level Bay ($28,000–$65,000), Working Capital, Garagekeepers Insurance & Google Local Service Ads ($21,000–$56,000). Founders should budget for both initial buildout/equipment CapEx and 5–11 months of working capital runway.
How much do auto glass repair, replacement & ADAS calibration owners make and what is a healthy profit margin?
Established auto glass repair, replacement & ADAS calibration operators generate $450,000–$1,600,000 in annual gross revenue (Windshield replacements ($400–$1,100) + mandatory ADAS camera recalibrations ($250–$500 at 85%+ gross margin)) with an owner cash flow of 20%–32% SDE margin (ADAS recalibration attached to 65%+ of late-model windshield replacements dramatically expands net margins). Key operating ratios include Wholesale Auto Glass, Mouldings & High-Modulus Urethane COGS: 26%–34% of revenue; Certified Auto Glass & Calibration Technician Payroll: 22%–28% of revenue; Calibration Shop Bay Rent & Mobile Fleet Fuel/Insurance: 7%–11% of revenue. Remember that gross revenue is top-line sales before payroll, COGS, and occupancy—not net owner take-home pay.
How is an auto glass repair, replacement & ADAS calibration valued when buying or selling an existing business?
Operating auto glass repair, replacement & ADAS calibration resales typically trade at 2.5x–3.8x SDE (Higher multiples for shops with in-house static/dynamic ADAS calibration bays and fleet/insurance network billing), translating to typical acquisition prices of 2.5x–3.8x SDE ($225,000–$1,946,000). Key buyer due-diligence priorities: Verify what percentage of windshield jobs include in-house ADAS recalibration vs. subletting to dealers. Inspect ADAS target equipment (Autel/Bosch/Hunter) and verify software subscriptions are current.
Is it better to start an independent auto glass repair, replacement & ADAS calibration or buy a franchise?
An independent auto glass repair, replacement & ADAS calibration costs $110,000–$300,000 to launch and pays 0% ongoing royalties, whereas comparable franchise systems (Jiffy Lube, Valvoline Instant Oil Change, Maaco, Christian Brothers Automotive) require $143,400–$5,284,000 in disclosed Item 7 opening investment plus 6%–7% of Gross Sales + 2% marketing (e.g., Novus Glass). Franchising provides brand playbooks and vendor programs, while independent ownership preserves full margin control and exit flexibility.