Concrete coring is a high-demand service in construction, renovation, and infrastructure work—and the barrier to entry is lower than you'd think if you have the right equipment and knowledge. Whether you're drilling holes for HVAC ducts, electrical conduits, or plumbing installations, there's consistent work available to contractors who understand their market and can bid competitively. This guide walks you through the essential steps to launch and scale a concrete coring operation.
Understand Your Market & Service Offerings
Concrete coring isn't one-size-fits-all. You'll encounter flat-work coring (horizontal holes in slabs), wall coring (vertical penetrations), and specialized jobs like core sampling for quality testing. Start by identifying which segments your local market demands most. New construction projects, renovation contractors, and facility maintenance teams are your primary customers.
Research what competitors in your region charge. Typical rates range from $75–$150 per hole for standard residential work, scaling up to $200–$400+ for commercial jobs with tight tolerances or difficult access. Larger diameter cores and specialized equipment command premium pricing.
Equipment Investment & Setup
Your largest upfront cost is the coring rig itself. A quality handheld drill with diamond-tipped core bits starts around $2,000–$5,000, while a full rig-mounted system can run $15,000–$50,000+. Most startup operations begin with a mobile setup: a vehicle, a handheld or small walk-behind rig, and a collection of diamond core bits (ranging from 1 inch to 6+ inches in diameter).
Budget for:
- Coring equipment: $3,000–$20,000 depending on scale
- Diamond bits and tools: $1,500–$3,000 (replace regularly as they wear)
- Safety gear & water delivery system: $500–$1,500
- Vehicle & licensing: $500–$2,000 (already owned in most cases)
- Insurance & permits: $1,200–$2,500 annually
A realistic first-year operating budget should account for equipment maintenance, bit replacement, fuel, and marketing.
Licensing, Insurance & Safety Compliance
Concrete cutting and coring requires adherence to strict safety standards. You'll need:
- General liability insurance: Minimum $1M coverage; expect $1,200–$2,500 annually
- Workers' compensation (if hiring employees): Mandatory in most states
- Local business license: $100–$500 one-time
- OSHA 30-Hour card: Not always required, but highly credible and shows professionalism
- Dust control certification: Many cities now mandate silica dust suppression protocols
Verify concrete cutting regulations in your state—some require specific certifications for hazardous material identification before coring (asbestos, lead, etc.).
Build Your Customer Base & Get Listed
Start by networking with general contractors, plumbing and electrical companies, and property managers. These are your repeat customers. Cold-call or visit job sites with a simple one-pager showing your services, response time, and rates.
Listing your services on platforms like Mercoly connects you directly with property owners and contractors actively seeking concrete coring work in your area—helping you win leads consistently without relying solely on referrals or cold outreach.
Create a simple portfolio of past jobs with before/after photos. Even if you're new, document your first projects professionally.
Pricing & Bid Strategy
Don't undercut aggressively early on. You want sustainable margins to reinvest in equipment and training. A basic formula: material costs (bits, water, fuel) typically run 15–25% of your bid, labor 50–65%, with 10–20% margin.
For a simple example: drilling ten 2-inch holes in a concrete slab might take 2 hours ($100–$150 labor per hour, depending on region), plus $50 in materials—total bid $350–$450.
Always ask about concrete thickness, reinforcement (rebar), existing penetrations, and water/power access. These factors affect your time and risk. Include a site visit estimate; it costs you 30 minutes but prevents lowball bids.
Scaling Efficiently
Once established, hire a second operator before buying a second rig. Operator training takes 2–4 weeks of hands-on work. Cross-training operators on saw cutting, wall chasing, and dust suppression diversifies revenue.
Invest in a wet vacuum with dust collection to meet tighter OSHA silica standards—this is now a competitive advantage that justifies higher pricing.
Frequently Asked Questions
Q: How much does a concrete core bit cost, and how long does it last? Diamond core bits typically cost $40–$200 depending on diameter and quality, and last 50–200 cores before significant wear. Budget for regular replacement.
Q: Do I need to know what's inside the concrete before coring? Absolutely—mark out conduit, rebar, and utility lines beforehand using a concrete scanner ($3,000–$8,000 equipment, or hire a scanning service for $200–$400 per job). Missing rebar or hitting electrical lines is expensive.
Q: How much should I charge for emergency or same-day coring jobs? Add 50–100% to your standard rate for rush jobs; contractors understand premium pricing for scheduling flexibility.
Start small, build a solid reputation, and reinvest profits into better equipment and marketing to grow steadily.