Concrete Labor Cost: What You Pay to Pour and Finish
Concrete labor costs $3–8 per square foot nationally (about $5 typical), which is $243–648 per cubic yard placed as a 4-inch slab. With materials, prep, and forms, installed concrete flatwork runs $6–12 per square foot, so a 20×20 slab costs $2,400–4,800 installed, of which $1,200–3,200 is labor. Local wages move the number most: cement mason pay ranges from $22.88/hour in San Antonio to $40.55/hour in San Francisco.
Concrete labor costs $3–8 per square foot nationally, about $5 on a typical job, and it is the largest single line in any concrete quote. Installed concrete flatwork — materials, base, forms, placement, and finishing together — runs $6–12 per square foot, so labor is roughly half of what you pay. Use the concrete cost calculator to price your exact slab, including a labor line adjusted for your metro.
Concrete Labor Cost Per Square Foot
Labor pricing scales with area because crews are sized to how much concrete they can place and finish before it sets. The table applies the national $3–8/sq ft labor range and the $6–12/sq ft installed range to common slab sizes.
| Slab Size | Square Feet | Labor Only ($3–8/sq ft) | Installed Total ($6–12/sq ft) |
|---|---|---|---|
| 10×10 ft | 100 | $300–800 | $600–1,200 |
| 12×12 ft | 144 | $432–1,152 | $864–1,728 |
| 20×20 ft | 400 | $1,200–3,200 | $2,400–4,800 |
| 24×24 ft | 576 | $1,728–4,608 | $3,456–6,912 |
| 30×30 ft | 900 | $2,700–7,200 | $5,400–10,800 |
| 40×40 ft | 1,600 | $4,800–12,800 | $9,600–19,200 |
Small pours break this math. Most contractors charge a $500–800 minimum because the crew, truck, and forming time are nearly fixed, so a 10×10 pad often costs the minimum rather than the per-foot rate. On large slabs the rate drifts toward the low end.
Labor vs. Materials: Where the Money Goes
For a professionally installed residential slab, labor and overhead make up about 60% of the price and materials about 40%.
| Cost Component | Share | Per Sq Ft (typical) |
|---|---|---|
| Concrete materials | ~30% | $2.00–3.00 |
| Site prep and forms | ~15% | $1.00–2.00 |
| Reinforcement (rebar or mesh) | ~10% | $0.75–1.50 |
| Labor (pour and finish) | ~45% | $4.00–6.00 |
| Total installed | 100% | $8–12 |
The concrete itself is the cheapest part per square foot. Delivered ready-mix runs $165–205 per cubic yard, and a yard covers about 81 sq ft at 4 inches, so the concrete in a basic slab is only about $2.00–2.50 per square foot. Everything else is people and equipment. The concrete slab cost guide breaks down the full installed price by size and region.
Labor Cost Per Yard and Per Hour
Contractors quote by the square foot, but the same labor can be expressed per yard or per hour:
| Unit | Labor Cost | How It's Derived |
|---|---|---|
| Per square foot | $3–8 | National range for 4-inch residential flatwork |
| Per cubic yard (4-inch slab) | $243–648 | $3–8 × 81 sq ft per yard |
| Per billed worker-hour | $40–70 | Contractor rate including overhead |
| Per cement mason wage-hour | $22.88–40.55 | BLS OEWS mean wage, 30 metros |
A crew of 3–4 can pour and finish a 400 sq ft slab in 4–6 hours on pour day — 12–24 labor hours, or $480–1,680 at $40–70/hour. The rest of the $1,200–3,200 labor bill for that slab covers excavation, compacting the base, setting and stripping forms, placing reinforcement, cutting control joints, and cleanup on the days before and after the pour.
What the Labor Price Covers — and What Adds to It
| Labor Item | Typical Cost | Notes |
|---|---|---|
| Excavation and gravel base | $2–3/sq ft | 4–6 in compacted base; poor soil costs more |
| Finishing labor (pour-day) | $2–6/sq ft | Screed, float, trowel, broom, joints |
| Finishing-only crew | $2–4/sq ft | You prep, form, and place; they finish |
| Demolition and haul-off | $2–4/sq ft | Removing an existing slab |
| Difficult access (wheelbarrow) | +$1–2/sq ft | Truck cannot reach the forms |
| Stamped finish labor | +$3–6/sq ft | Single pattern; $5–8 for multi-color |
| Pump truck | $150–300 per pour | When the chute cannot reach |
| Small-job minimum | $500–800 | Applies under roughly 100 sq ft |
When comparing bids, check that each one includes the same items. A quote that looks $1–2/sq ft cheaper often excludes base prep, reinforcement, or joint cutting. Our contractor quote fairness study shows how far real quotes spread for the same job.
Concrete Labor Cost by Metro
Regional wages move the installed price more than material costs, because ready-mix pricing varies far less across the country than finisher pay. SlabCalc's cost index uses the BLS Occupational Employment and Wage Statistics (OEWS, May 2024) mean hourly wage for cement masons and concrete finishers (SOC 47-2051) in each metro. The labor index is that wage divided by the national reference of $26.67/hour (the median of all U.S. metro-area means). The last column scales the national $3–8/sq ft labor range by the index — a SlabCalc estimate, not a quote.
| Metro | Labor Index | BLS Cement Mason Wage | State Prevailing Wage (public work) | Est. Labor per Sq Ft |
|---|---|---|---|---|
| San Francisco, CA | 1.52 | $40.55 | $57.00 | $4.60–12.20 |
| Seattle, WA | 1.47 | $39.28 | $54.00 | $4.40–11.80 |
| Chicago, IL | 1.45 | $38.57 | $58.50 | $4.30–11.60 |
| New York, NY | 1.37 | $36.50 | $72.00 | $4.10–10.90 |
| San Diego, CA | 1.33 | $35.60 | $57.00 | $4.00–10.70 |
| Portland, OR | 1.31 | $34.91 | $48.00 | $3.90–10.50 |
| Los Angeles, CA | 1.31 | $34.90 | $57.00 | $3.90–10.50 |
| Minneapolis, MN | 1.30 | $34.73 | $47.00 | $3.90–10.40 |
| Boston, MA | 1.29 | $34.37 | $68.00 | $3.90–10.30 |
| Sacramento, CA | 1.24 | $33.17 | $57.00 | $3.70–9.90 |
| St. Louis, MO | 1.23 | $32.93 | — | $3.70–9.90 |
| Riverside, CA | 1.22 | $32.43 | $57.00 | $3.60–9.70 |
| Philadelphia, PA | 1.20 | $32.13 | $50.00 | $3.60–9.60 |
| Columbus, OH | 1.15 | $30.58 | — | $3.40–9.20 |
| Detroit, MI | 1.12 | $29.89 | $40.00 | $3.40–9.00 |
| Kansas City, MO | 1.11 | $29.73 | — | $3.30–8.90 |
| Denver, CO | 1.11 | $29.63 | — | $3.30–8.90 |
| Las Vegas, NV | 1.08 | $28.93 | — | $3.30–8.70 |
| Phoenix, AZ | 1.05 | $28.07 | — | $3.20–8.40 |
| Tampa, FL | 0.99 | $26.47 | — | $3.00–7.90 |
| Miami, FL | 0.96 | $25.53 | — | $2.90–7.70 |
| Orlando, FL | 0.91 | $24.32 | — | $2.70–7.30 |
| Atlanta, GA | 0.91 | $24.20 | — | $2.70–7.30 |
| Charlotte, NC | 0.91 | $24.18 | — | $2.70–7.30 |
| Nashville, TN | 0.91 | $24.15 | — | $2.70–7.20 |
| Austin, TX | 0.88 | $23.53 | — | $2.60–7.10 |
| Dallas, TX | 0.88 | $23.39 | — | $2.60–7.00 |
| Raleigh, NC | 0.87 | $23.19 | — | $2.60–7.00 |
| Houston, TX | 0.86 | $22.95 | — | $2.60–6.90 |
| San Antonio, TX | 0.86 | $22.88 | — | $2.60–6.90 |
Source: SlabCalc cost index — BLS OEWS May 2024 (SOC 47-2051); prevailing wage rates for cement masons including fringe where applicable. "—" means no prevailing-wage rate in the dataset.
Prevailing wages apply to public and publicly funded work, not a private homeowner's patio, but they set the floor for union crews in those markets. That is why New York ($72.00/hour), Boston ($68.00), and Chicago ($58.50) quote well above the Sun Belt even for residential flatwork. For installed prices built from state DOT bid records in each metro, see the SlabCalc concrete cost index.
Concrete Installation Cost by Project Type
| Project | Installed Cost | Labor Share Notes |
|---|---|---|
| Patio, pad, or basic slab | $6–12/sq ft | Straightforward forming; minimums hit small pads |
| Sidewalk or walkway | $8–13/sq ft | Long narrow forms add edge work per sq ft |
| Driveway | $7–13/sq ft | Thicker section and heavier base prep |
| Garage floor | $6–12/sq ft | Steel-trowel finish, often power-troweled |
| Basement floor | $6–11/sq ft | Pump or wheelbarrow access below grade |
| Stamped or decorative | $10–15/sq ft | Specialist crew and tight stamping window |
Each project type has its own calculator with the matching defaults: patio, driveway, garage floor, basement floor, and interior concrete floor for polished, stained, or sealed floors.
Why Concrete Labor Costs What It Does
- One set window. Once the truck arrives, the crew has a few hours to place, screed, float, and finish before the concrete hardens. Crews are staffed for peak demand, not average demand.
- Truck-sized pours. A standard ready-mix truck carries about 10 cubic yards (NRMCA). Pours larger than one load need planned construction joints and a coordinated second truck.
- Code and spec work. Residential slabs follow IRC R506.1 (3.5-inch minimum thickness; 4 inches is standard) and R506.2.3 (vapor retarder under slabs in living space), with reinforcement per ACI 332-20. Getting base, joints, and reinforcement right is labor, not material.
- Insurance and equipment. The $40–70 billed hourly rate carries workers' comp, liability insurance, power trowels, screeds, saws, and trucks.
Cutting Labor Costs
- Do the prep yourself. Handling excavation, base, forms, and reinforcement yourself saves about $1–3/sq ft; hiring a finishing-only crew at $2–4/sq ft for pour day is a middle path.
- Keep it simple. A broom finish instead of stamped saves $3–8/sq ft in labor-heavy decorative work.
- Combine small jobs. Pouring a walkway and a pad on the same day spreads one minimum across both.
- Clear access. A truck that can chute directly to the forms avoids pump fees and the $1–2/sq ft wheelbarrow premium.
- Get 3+ bids. Labor is the variable part of every quote; the spread between contractors in the same market is often 40% or more.
DIY saves 50–60% of the installed price on small pours because you buy back the labor share — but the finishing risk is real. Compare both paths in the DIY vs. contractor concrete cost guide or the DIY vs. pro finishing tool.
Key Takeaways
- Concrete labor costs $3–8 per square foot nationally, about $243–648 per cubic yard at 4 inches.
- Installed concrete flatwork runs $6–12 per square foot; labor and overhead are about 60% of it.
- Crews bill $40–70 per worker-hour; cement mason wages run $22.88–40.55/hour across 30 metros (BLS OEWS 2024).
- High-wage metros (San Francisco, Seattle, Chicago) cost roughly 1.45–1.5× the national labor rate; Texas metros about 0.86–0.88×.
- Expect a $500–800 minimum on small pours, $2–4/sq ft extra for demolition, and $150–300 for a pump truck.