A concrete slab costs $6 to $12 per square foot to pour and finish in 2026, with most homeowners paying $2,400 to $7,200 total. The final price depends on slab thickness (4” vs 6”), reinforcement type, finish, and local labor rates — a 20×20 patio slab averages $2,400 to $4,800, while a 2-car garage floor runs $3,000 to $6,600. These figures include site preparation, forming, concrete delivery, pouring, finishing, and basic cleanup.
How Much Does a Concrete Slab Cost in 2026?
The wide $6–$12 per square foot range exists because it covers different scopes of work. A simple 4” broom-finish patio slab on flat, prepped ground lands at the low end ($6–$8/sq ft). A 6” reinforced garage floor with grading, rebar, and smooth finishing falls toward the high end ($9–$12/sq ft). Decorative finishes like stamped or colored concrete push costs above $12/sq ft.
| Cost Level | Installed $/sq ft | What’s Included |
|---|---|---|
| Low end | $6–$8 | 4” thickness, wire mesh or fiber reinforcement, broom finish, minimal site prep, flat ground |
| Mid-range | $8–$10 | 4–5” thickness, wire mesh, broom or smooth finish, standard grading, gravel base |
| High end | $10–$12+ | 5–6” thickness, rebar grid, smooth or textured finish, excavation, full site prep |
| Decorative | $14–$24+ | Any thickness, stamped/colored/exposed aggregate finish, complex forming |
Minimum project costs typically start at $600–$1,000 for very small slabs (under 100 sq ft), since contractors have fixed mobilization costs regardless of slab size. At the upper end, a large house foundation slab can exceed $28,000.
The price confusion across online sources — some cite $4/sq ft, others $15/sq ft — comes from mixing material-only costs with full installed costs, and from bundling different thicknesses, finishes, and site conditions under one number. The table above clarifies exactly what each price tier includes.
Ready-mix concrete itself costs $150 to $200 per cubic yard delivered in 2026, up from roughly $125/yard in 2020. Rising material costs, labor shortages in the trades, and tariff uncertainty on imported cement have pushed 2026 prices 5–10% above 2024 levels in most metro areas.
Concrete Slab Cost by Size
The table below shows installed costs for 12 common slab sizes at three thickness levels. Cubic yards and bag counts help DIY estimators calculate material needs. All costs assume standard broom finish and wire mesh reinforcement at national average pricing.
| Size | Sq Ft | 4” Thick | 5” Thick | 6” Thick | Cubic Yards | 80lb Bags |
|---|---|---|---|---|---|---|
| 8×10 | 80 | $480–$640 | $530–$720 | $590–$840 | 1.0 | ~67 |
| 10×10 | 100 | $600–$800 | $670–$900 | $740–$1,050 | 1.2 | ~84 |
| 10×12 | 120 | $720–$960 | $800–$1,080 | $890–$1,260 | 1.5 | ~100 |
| 12×12 | 144 | $860–$1,150 | $960–$1,300 | $1,070–$1,510 | 1.8 | ~120 |
| 12×16 | 192 | $1,150–$1,540 | $1,280–$1,730 | $1,420–$2,020 | 2.4 | ~160 |
| 16×20 | 320 | $1,920–$2,560 | $2,130–$2,880 | $2,370–$3,360 | 3.9 | ~267 |
| 20×20 | 400 | $2,400–$3,200 | $2,670–$3,600 | $2,960–$4,200 | 4.9 | ~334 |
| 20×24 | 480 | $2,880–$3,840 | $3,200–$4,320 | $3,550–$5,040 | 5.9 | ~400 |
| 24×24 | 576 | $3,460–$4,610 | $3,840–$5,180 | $4,270–$6,050 | 7.1 | ~480 |
| 30×30 | 900 | $5,400–$7,200 | $6,000–$8,100 | $6,660–$9,450 | 11.1 | ~750 |
| 30×40 | 1,200 | $7,200–$9,600 | $8,000–$10,800 | $8,880–$12,600 | 14.8 | ~1,000 |
| 40×60 | 2,400 | $14,400–$19,200 | $16,000–$21,600 | $17,760–$25,200 | 29.6 | N/A |
How to read this table: Find your slab size, then move across to your required thickness. The “Cubic Yards” column shows how much ready-mix concrete to order — add 10% for waste. The “80lb Bags” column is for DIY reference, but any project requiring more than about 20 bags (roughly 1.5 cubic yards) is better served by ready-mix delivery.
Volume formula: (Length × Width × Thickness in feet) ÷ 27 = cubic yards. Example: 20 × 20 × (4÷12) ÷ 27 = 4.9 cubic yards.
For a personalized estimate that factors in your city’s labor rates, use the concrete slab cost calculator below.
Concrete Slab Cost by Project Type
Different projects call for different specifications — thickness, reinforcement, and finish — which drive significant cost variation. A patio slab and a garage floor may cover similar square footage but the garage requires thicker concrete and heavier reinforcement.
| Project Type | Typical Size | Thickness | Reinforcement | Typical Finish | Cost Range |
|---|---|---|---|---|---|
| Shed foundation | 80–200 sq ft | 4” | Wire mesh | Broom | $480–$1,600 |
| Patio | 200–400 sq ft | 4” | Wire mesh or fiber | Broom or stamped | $1,200–$4,800 |
| 1-car garage floor | 200–250 sq ft | 5–6” | Rebar grid | Broom or smooth | $1,500–$3,300 |
| 2-car garage floor | 400–500 sq ft | 5–6” | Rebar grid | Broom or smooth | $3,000–$6,600 |
| Driveway | 400–800 sq ft | 5–6” | Rebar grid + fiber | Broom or exposed agg. | $3,200–$12,000 |
| Pool deck | 300–600 sq ft | 4” | Wire mesh | Stamped or textured | $2,700–$9,000 |
| House foundation | 1,000–2,500 sq ft | 6–8” | Rebar grid (engineered) | None (covered) | $8,000–$28,000 |
Why the cost spread? A garage floor costs more per square foot than a patio of the same size because garages need 5–6” thickness (50% more concrete than 4”), rebar grid reinforcement (vs. cheaper wire mesh), and often a smoother finish for epoxy coating later. A house foundation adds engineering requirements, deeper footings, and inspection costs.
Pool decks sit at the high end per square foot because decorative finishes (stamped, textured, cool-deck coatings) add $8–$19/sq ft over basic broom finish. The concrete and structural costs are similar to a patio — the finish is what drives the price.
For more on concrete patio costs specifically, see the Concrete & Masonry cost overview.
What Affects Concrete Slab Cost?
Six factors account for most of the price variation between the low end ($6/sq ft) and high end ($12+/sq ft). Each is quantified below with specific dollar impacts.
Slab Thickness
Thickness is the single biggest material cost driver. A 6” slab uses 50% more concrete than a 4” slab covering the same area.
| Thickness | Avg Cost/Sq Ft | Concrete per 100 Sq Ft | Typical Use |
|---|---|---|---|
| 4” | ~$5.35 | 1.2 cubic yards | Patios, walkways, shed pads |
| 5” | ~$5.78 | 1.5 cubic yards | Light-duty garages, carports |
| 6” | ~$6.19 | 1.9 cubic yards | Driveways, garage floors, heavy loads |
For structural applications like house foundations, 8” or thicker slabs with engineered specifications are standard — consult a structural engineer for exact requirements.
Reinforcement Type
| Reinforcement | Add-On Cost/Sq Ft | Best For |
|---|---|---|
| Fiber reinforcement | +$0.10–$0.20 | Hairline crack control; mixed into concrete |
| Wire mesh (6×6 W1.4/W1.4) | +$0.20–$0.35 | Standard residential patios, shed pads |
| Rebar grid (#3 or #4, 18” spacing) | +$0.50–$1.00 | Driveways, garages, any vehicle traffic |
| Post-tensioned cables | +$1.50–$3.00 | House foundations on expansive soil |
Wire mesh and fiber control cracking but don’t add structural strength. Rebar grid is necessary anywhere the slab supports vehicle weight or structural loads. Most residential patio contractors include wire mesh in their base price.
Concrete Strength (PSI)
Most residential slabs use 3,000 PSI concrete — the standard mix. Higher-strength mixes cost roughly $5–$10 more per cubic yard but are necessary for specific applications.
| PSI Grade | Cost Premium | Recommended For |
|---|---|---|
| 3,000 PSI | Standard (base price) | Patios, walkways, shed foundations |
| 3,500 PSI | +$5–$8/cubic yard | Driveways, garage floors |
| 4,000 PSI | +$8–$12/cubic yard | Heavy vehicle traffic, commercial |
| 4,500+ PSI | +$12–$20/cubic yard | Structural foundations, industrial |
Specifying 3,500 PSI for a driveway instead of 3,000 PSI adds roughly $25–$50 to the total cost of a typical 2-car driveway pour — a minor expense for meaningful durability improvement.
Finish Type
The finish is where costs can escalate quickly, especially with decorative options.
| Finish | Add-On Cost/Sq Ft | Notes |
|---|---|---|
| Broom finish | Included in base price | Standard texture, good traction, most common |
| Smooth/trowel | +$0.50–$1.00 | Garage floors, interior slabs |
| Colored/integral stain | +$2–$6 | Color mixed in or applied after pour |
| Exposed aggregate | +$2–$4 | Decorative stone surface, requires wash technique |
| Stamped concrete | +$8–$19 | Mimics stone, brick, or tile; highest labor cost |
Stamped concrete more than doubles the cost of a basic slab. A 400 sq ft patio in broom finish costs $2,400–$3,200 installed. The same patio with stamped finish costs $5,600–$10,800. For dedicated stamped concrete pricing, see the Concrete & Masonry overview.
Site Preparation
Site conditions before the pour significantly affect total cost. Flat, accessible ground with no existing surface to remove is the cheapest scenario.
| Site Work | Typical Cost | When Needed |
|---|---|---|
| Excavation | $500–$2,500 | Sloped ground, need to create level pad |
| Grading and compaction | $1–$2/sq ft | Most projects (included in many bids) |
| Gravel subbase (4” compacted) | $1–$2/sq ft | Standard for all slabs |
| Demolition of existing slab | $2–$6/sq ft | Replacing old, cracked concrete |
| Tree root removal | $200–$1,000 | Roots in slab footprint |
A project on flat ground with good drainage might need only gravel base ($1–$2/sq ft). A project requiring excavation, demolition of an old slab, and grading could add $3,000–$5,000 before any concrete is poured.
Access and Logistics
Two often-overlooked costs catch homeowners off guard:
Short-load fees: Ready-mix trucks typically require a minimum order of 1–3 cubic yards (varies by supplier). Orders below the minimum incur surcharges of $50–$100+ per cubic yard under the minimum. A 10×10 slab at 4” needs only 1.2 cubic yards — if the supplier minimum is 3 yards, the short-load fee could add $90–$180 to the delivery cost. Always ask about minimums when ordering.
Concrete pump rental: If the truck can’t back up to within reach of the pour site (backyard slabs with no gate access, elevated pours), a concrete pump truck costs $150–$250 per hour, typically with a 2-hour minimum. For line pumps (smaller jobs), expect $300–$600 total.
Concrete Slab Cost by City
Labor rates vary dramatically across the US. The table below applies each city’s labor adjustment factor to the national average of $6–$12 per square foot. A homeowner in New York pays roughly 45% more than the national average; a homeowner in San Antonio pays about 12% less.
| City | Labor Factor | Cost/Sq Ft | 20×20 Slab Cost | vs. National |
|---|---|---|---|---|
| New York, NY | 1.23 | $7.38–$14.76 | $2,950–$5,905 | +23% |
| Los Angeles, CA | 1.14 | $6.84–$13.68 | $2,735–$5,470 | +14% |
| Seattle, WA | 1.29 | $7.74–$15.48 | $3,095–$6,190 | +29% |
| San Diego, CA | 1.15 | $6.90–$13.80 | $2,760–$5,520 | +15% |
| Portland, OR | 1.15 | $6.90–$13.80 | $2,760–$5,520 | +15% |
| Denver, CO | 1.07 | $6.42–$12.84 | $2,570–$5,135 | +7% |
| Miami, FL | 0.91 | $5.46–$10.92 | $2,185–$4,370 | −9% |
| Philadelphia, PA | 1.12 | $6.72–$13.44 | $2,690–$5,375 | +12% |
| Chicago, IL | 1.33 | $7.98–$15.96 | $3,190–$6,385 | +33% |
| Austin, TX | 0.95 | $5.70–$11.40 | $2,280–$4,560 | −5% |
| Minneapolis, MN | 1.27 | $7.62–$15.24 | $3,050–$6,095 | +27% |
| Atlanta, GA | 0.92 | $5.52–$11.04 | $2,210–$4,415 | −8% |
| Las Vegas, NV | 1.01 | $6.06–$12.12 | $2,425–$4,850 | +1% |
| Phoenix, AZ | 0.99 | $5.94–$11.88 | $2,375–$4,750 | −1% |
| Dallas, TX | 0.89 | $5.34–$10.68 | $2,135–$4,270 | −11% |
| Nashville, TN | 0.93 | $5.58–$11.16 | $2,230–$4,465 | −7% |
| Houston, TX | 0.93 | $5.58–$11.16 | $2,230–$4,465 | −7% |
| Tampa, FL | 0.87 | $5.22–$10.44 | $2,090–$4,175 | −13% |
| Charlotte, NC | 0.92 | $5.52–$11.04 | $2,210–$4,415 | −8% |
| San Antonio, TX | 0.85 | $5.10–$10.20 | $2,040–$4,080 | −15% |
Labor adjustment factors are derived from BLS Occupational Employment and Wage Statistics (May 2025): the median ratio of local to national hourly wages across the trades that do this work. How this is calculated.
City costs are calculated as: National Average × City Labor Adjustment Factor. The same 20×20 slab that costs $2,400–$4,800 at national average pricing runs $3,480–$5,905 in New York — a difference of over $1,000 at the low end alone. For how these adjustment factors are derived, see the cost calculation methodology page.
Materials and Labor Cost Breakdown
Understanding where the money goes helps evaluate whether a contractor’s quote is fair. The breakdown below applies to a typical 4” residential slab with wire mesh reinforcement and broom finish.
| Component | Cost/Sq Ft | % of Total | Notes |
|---|---|---|---|
| Concrete material (delivered) | $2.50–$4.50 | 30–40% | Ready-mix, varies by PSI grade and order volume |
| Gravel/subbase | $0.75–$1.50 | 8–12% | 4” compacted gravel base, standard for all slabs |
| Reinforcement | $0.20–$1.00 | 3–8% | Wire mesh (low) to rebar grid (high) |
| Forming lumber | $0.50–$1.00 | 5–8% | 2×4 or 2×6 dimensional lumber + stakes |
| Vapor barrier | $0.10–$0.25 | 1–2% | 6-mil polyethylene sheeting under slab |
| Labor: site prep | $1.00–$2.50 | 12–18% | Excavation, grading, compaction |
| Labor: forming and pour | $1.50–$3.00 | 18–25% | Set forms, place reinforcement, pour, screed, float |
| Labor: finishing | $0.50–$2.00 | 5–15% | Broom (low end) to decorative finish (high end) |
| Cleanup and misc | $0.25–$0.50 | 3–5% | Form removal, site cleanup, control joint cutting |
Materials account for roughly 40–55% of total cost, labor for 45–60%. This ratio shifts toward labor on smaller slabs (fixed setup time spread over fewer square feet) and toward materials on larger slabs.
One detail competitors consistently get wrong: reporting labor as a flat “$2–$5/sq ft” without context. In reality, site prep labor ($1–$2.50/sq ft) and pour/finish labor ($1.50–$3/sq ft) vary independently. A slab on prepped ground with broom finish has low labor costs on both fronts. A slab requiring excavation plus stamped finish hits the high end on both — and those costs stack.
DIY vs. Hiring a Concrete Contractor
Pouring a concrete slab yourself can save 40–60% of labor costs, but only for certain project sizes and conditions. The comparison below uses a 20×20 patio slab (4” thick, broom finish) as the baseline.
| Cost Component | DIY | Professional |
|---|---|---|
| Ready-mix concrete (4.9 yards + 10% waste) | $740–$980 | Included |
| Gravel base (4” depth) | $150–$300 | Included |
| Wire mesh reinforcement | $70–$140 | Included |
| Forming lumber and stakes | $60–$100 | Included |
| Tools and equipment rental | $200–$400 | Included |
| Total | $1,220–$1,920 | $2,400–$4,800 |
| Potential savings | $1,180–$2,880 | — |
Equipment rental includes a concrete vibrator, bull float, hand floats, edger, groover, and wheelbarrows. A concrete mixer is unnecessary with ready-mix delivery, but you need enough labor (2–4 people minimum) to place and finish the concrete before it sets — typically a 1–2 hour window.
When DIY Makes Sense
- DIY-friendly: Slabs under 100 sq ft, flat ground, 4” thickness, no structural load, broom finish. Examples: shed pad, small AC unit pad, hot tub base.
- Marginal DIY: 100–200 sq ft, minor grading needed, non-structural. Possible with experience and helpers, but mistakes are costly and permanent.
- Hire a pro: Over 200 sq ft, any slope requiring grading, structural use (garage, foundation), decorative finishes, or any project requiring a building permit.
An important reality check: an 80-bag concrete pour (enough for a 12×12 slab at 4”) is physically exhausting and takes a full day with 2–3 people. Each 80lb bag must be mixed, carried, placed, and finished. At roughly 20+ bags, ordering ready-mix delivery becomes both cheaper per yard and far more practical than bagging it.
Bagged vs. Ready-Mix Decision
| Bagged Concrete | Ready-Mix Delivery | |
|---|---|---|
| Cost per cubic yard | $180–$250 (after mixing) | $150–$200 delivered |
| Best for | Under 1.5 cubic yards (~150 sq ft at 4”) | Over 1.5 cubic yards |
| Advantages | Buy only what you need, work at your own pace | Faster, less labor, more consistent mix |
| Disadvantages | Extremely labor-intensive, inconsistent mixing | Minimum order fees, must pour all at once |
| Watch out for | Underestimating bag count and effort | Short-load fees on small orders ($50–$100+/yard under minimum) |
How to Evaluate a Contractor’s Quote
A legitimate concrete slab bid should itemize the work, not present a single lump-sum number. Use this 10-point checklist to evaluate any quote:
What a good quote includes:
- Slab dimensions and thickness — exact measurements, not “approximately”
- Concrete PSI grade — 3,000 PSI minimum for residential; 3,500+ for driveways
- Reinforcement type and spacing — wire mesh gauge or rebar size and grid spacing
- Base preparation — gravel type, depth, and compaction method
- Finish type — broom, smooth, stamped, etc., explicitly stated
- Demolition and removal — if replacing an existing surface, cost and disposal method
- Permit costs — typically $50–$500 depending on jurisdiction and project scope
- Project timeline — start date, pour date, when forms are removed, when the slab is usable
- Cleanup — form removal, site grading, and debris disposal included
- Warranty — minimum 1 year covering cracking and settling; 2–5 years for structural work
Red flags in a concrete quote:
- No line items — just a total number with no breakdown
- No mention of reinforcement (cutting corners on structural integrity)
- Price significantly below market rate ($4/sq ft or less for full install = likely skipping base prep or using thinner concrete)
- Full payment required upfront — standard terms are 10–30% deposit with balance due on completion
- No timeline or vague “we’ll get to it” scheduling
- Unwillingness to pull permits when required
Getting 3 quotes is standard practice. The spread between the lowest and highest quote on identical work is typically 20–40%. Discard outliers on both ends — the cheapest bid often means cut corners, and the most expensive may include unnecessary upsells.
Concrete Slab Cost Calculator
The calculator at the top of this page takes the slab area and a metro, applies that metro’s labour index to the published range, and splits the result into materials and labour. Thickness, finish and reinforcement each move the figure within that range, and the tables below price them one at a time; concrete volume and the 80lb-bag count for a DIY pour are worked through in the sections that follow. For the full derivation of the metro index, see the methodology page.
Related Exterior Costs
A slab pour rarely arrives alone, and the adjacent work is priced separately. Based on aggregated data, a concrete slab runs $1,800 to $7,500, typically around $4,000.
Where the slab is a driveway, the alternative to replacement is maintenance of the existing surface: asphalt sealcoating runs $120 to $900, an order of magnitude below a pour, which is why the two are frequently quoted against each other rather than together.
Two other jobs commonly share the same excavation. Vinyl fence installation costs $2,500 to $10,000 and sets its posts in concrete footings, so fence and slab work are often scheduled against the same concrete delivery. Sprinkler system installation runs $2,500 to $8,000, and existing irrigation lines have to be located before any slab excavation begins — a line struck during excavation is repaired at the homeowner’s cost, not the contractor’s.