Concrete Slab Cost in 2026
CalcShed uses HomeGuide’s published $6–$12 per sq ft installed range as a U.S. planning reference. For a 20×20-ft footprint, that is $2,400–$4,800 by area, before a contractor confirms the included work. Compare published cost sources.
Estimate your concrete slab cost
Enter dimensions and the intended use. Known thickness provides raw volume; no waste is added.
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What does this estimate include?
The $6–$12-per-square-foot reference does not define an itemized scope. Confirm the work below in each contractor’s written quote.
What the illustration tells you
- The footprint area, based on your entered dimensions.
- The mathematical cost range using one published per-square-foot reference.
- Raw geometric volume if thickness is known, with no ordering allowance.
What you must confirm separately
- Demolition, excavation, grading, base and compaction.
- Forms, reinforcement, edges, mix specification, finish and curing.
- Access, short-load or pump needs, permits, inspections, taxes and cleanup.
Different publishers use different inclusions. For example, Homewyse's basic cement slab installation model excludes several site-preparation tasks from its core labor scope. Comparing headline prices without comparing included work is misleading.
Concrete slab cost per square foot
At $6–$12 per square foot, 100 sq ft gives a $600–$1,200 planning illustration. Small-job minimums may exceed this amount; larger or engineered projects need project-specific pricing.
Do not add every advertised material, labor and excavation range to this installed-cost figure. That could count parts of the work twice. Instead, ask for written bids listing what's included.
Concrete cost per cubic yard: 2026 local supplier examples
Material sold by cubic yard is not the same product as an installed slab priced per square foot. For identifiable current examples, two published January 2026 price lists report the following base/list prices for 3,000-PSI mixes:
| Supplier and market | Published per yd³ | Important quote limitation |
|---|---|---|
| Gehring, Nebraska | $148 | Local SG-3000 sand/gravel mix (3,000 PSI); short-load charge below four yards on listed terms |
| Grand Rapids Gravel, Michigan | $198 | Local 3,000-PSI list price, two-yard minimum, separate hauling terms |
For additional industry context, Concrete Financial Insights reports a $179.95-per-yd³ weighted 2025 selling-price index from four publicly reporting producers. Its analysis states that those producers represent roughly 4% of estimated 2025 U.S. ready-mix volume and may skew toward higher-priced specialty/commercial work. It is not a third 2026 local supplier list, a representative national homeowner delivery price or a residential installation quote.
Local worked example: Grand Rapids Gravel's listed 2 yd³ × $198/yd³ plus its published $160 minimum-haul amount gives $556 before other applicable charges. This calculation uses that supplier's specific list terms, not a national delivered rate.
These observations use different sampling, contracts and delivery conditions. They do not establish a national $148–$198 delivered price range. Ask suppliers about ordered volume, minimums, wait time, short loads, fuel/haul fees, taxes, access and pump charges.
For example, ten cubic yards multiplied by Gehring's listed $148 material rate is $1,480 before additional conditions and fees. A 20×20-ft slab at 4 inches is 4.94 yd³ geometrically; that is not a supplier-order amount. Use the Ready-Mix Concrete Calculator to plan your actual order and supplier increments.
Concrete slab cost by size
These arithmetic examples use the same $6–$12/sq-ft reference and a 4-inch geometric thickness only for the separate volume calculation. No unsupported large-job discount is applied.
| Footprint | Area | Reference arithmetic | Raw concrete, 4 in |
|---|---|---|---|
| 10×10 ft100 sq ft | 100 sq ft | $600–$1,200*Small-job charges may exceed this arithmetic reference. | 1.23 yd³ |
| 12×12 ft144 sq ft | 144 sq ft | $864–$1,728*Check base work, access and minimum setup charges. | 1.78 yd³ |
| 12×16 ft192 sq ft | 192 sq ft | $1,152–$2,304*Illustrative simple flatwork only. | 2.37 yd³ |
| 12×24 ft288 sq ft | 288 sq ft | $1,728–$3,456*Check intended purpose and site conditions. | 3.56 yd³ |
| 15×15 ft225 sq ft | 225 sq ft | $1,350–$2,700*Illustrative simple flatwork only. | 2.78 yd³ |
| 20×20 ft400 sq ft | 400 sq ft | $2,400–$4,800*Confirm actual scope in a written quote. | 4.94 yd³ |
| 20×30 ft600 sq ft | 600 sq ft | $3,600–$7,200*Confirm placement logistics and intended loads. | 7.41 yd³ |
| 24×24 ft576 sq ft | 576 sq ft | $3,456–$6,912*Garage or vehicle-bearing use needs project-specific scope. | 7.11 yd³ |
| 30×30 ft900 sq ft | 900 sq ft | $5,400–$10,800*Large pours require scope-specific coordination. | 11.11 yd³ |
| 30×40 ft1,200 sq ft | 1,200 sq ft | $7,200–$14,400*Structural and building use cannot be priced by this simple rate. | 14.81 yd³ |
| 30×50 ft1,500 sq ft | 1,500 sq ft | $9,000–$18,000*Large-project area arithmetic, not an engineered slab bid. | 18.52 yd³ |
*Illustrative multiplication, not installed-price quotes. Notes in each row flag exceptions. Structural applications require separate quotes; raw volume excludes overage, supplier increments and waste.
Both contain about 4.94 yd³ at a uniform four-inch depth, but one has 25% more perimeter. Forms and site access can differ; that is not a 25% installed-price claim.
Bagged concrete vs. delivered ready-mix: quantities and workload
A specified 80-lb QUIKRETE Concrete Mix bag yields approximately 0.60 ft³; other products and sizes differ. The table reports bags and dry packaged weight before allowance, not a claim that bagged concrete is cheaper or suitable for every pour.
| Footprint at 4 inches | Bags before allowance | Dry bag weight |
|---|---|---|
| 1 yd³ (volume reference) | 45 | 3,600 lb |
| 4×8 ft | 18 | 1,440 lb |
| 10×10 ft | 56 | 4,480 lb |
| 20×20 ft | 223 | 17,840 lb |
| 20×20 ft plus illustrative 10% allowance | 245 | 19,600 lb |
The last row is a separately labeled example; the estimator does not add 10% automatically. Before deciding, compare actual bag prices, delivery, mixing equipment, labor and a local ready-mix supplier's complete quote. There is no universal national break-even threshold.
Use the Concrete Bag Calculator for specific product yields and the Ready-Mix Calculator for bulk delivery. The Slab Calculator handles quantity planning independently.
Five factors that change slab installation costs
- Size, depth and edges. Footprint establishes area. Uniform 4-, 5- and 6-inch depths on 20×20 ft require approximately 4.94, 6.17 and 7.41 yd³. Deeper edges and footings require a separate takeoff; volume changes do not increase every installed-cost item proportionally.
- Ground and base work. Excavation, soil suitability, drainage, base depth, compaction and removed material can radically change required work.
- Concrete specification and reinforcement. The mix, load requirements, jointing and reinforcement must follow the intended use. Reinforcement may limit crack width; it does not make concrete crack-proof. A January 2026 Nebraska supplier list posts $148/yd³ for one 3,000-PSI mix and $156/yd³ for its 4,000-PSI mix: $8/yd³ difference for those listed products, not a nationwide upgrade rate.
- Finish and curing. A broom finish and decorative stamped work require different operations. A Georgia contractor's 2026 advertised installed patio prices are $6–$9/sq ft for broom-finished and $10–$18/sq ft for stamped, with stated scope. These are one supplier's advertisements, not universal surcharges. Proper curing matters for performance; see NRMCA guidance.
- Delivery and placement logistics. Truck access, hose/pump needs, minimum loads, weather and scheduling are quote-specific. Compare complete proposed scopes rather than stacking generic allowances onto an installed-price range.
Thickness does not select a structural design. This estimator's dimension inputs provide geometric quantities only. Confirm the appropriate specification locally for loads, soil, exposure and applicable requirements.
Site preparation and additional work: what to check in the quote
An installed-cost guide cannot tell you which site tasks your contractor includes. These questions follow the topics in the NRMCA/ASCC pre-construction checklist; they do not set national surcharge rates.
| Work item | What your quote should specify |
|---|---|
| Removal, excavation and grading | Existing concrete, soil removal, fill and disposal, final grading |
| Aggregate base | Material, thickness, compaction expectations and who performs them |
| Reinforcement and edges | Specified bars/mesh, supports, joints, forms or thickened sections where applicable |
| Drainage, access and delivery | Water management, truck/pump access, mobilization and delivery terms |
| Permits, utilities and closeout | Approvals, inspections, 811 locate when digging, debris and site restoration |
Two bids are comparable only after excluded work, allowances and unknowns are explained.
How to estimate a slab cost and prepare for quotes
- Measure the approximate footprint in feet and calculate length × width.
- Use the national per-square-foot reference for an initial illustration, not a final bid.
- List your intended use, site access, known demolition and unusual conditions.
- Ask local contractors to price the same documented scope.
- Compare omissions, allowances, payment terms and schedule before comparing totals.
| Hypothetical bid | Initial quote | Excluded required work | Illustrative subtotal |
|---|---|---|---|
| Contractor A | $4,000 | None identified | $4,000 |
| Contractor B | $3,500 | Excavation: $700 | $4,200 |
Illustrative bids invented solely to demonstrate additional quoted costs, not observed market prices. Contractor B’s $4,200 is a provisional sum of $3,500 plus $700 and becomes comparable to Contractor A’s $4,000 only after the written documents confirm the same slab specification, complete omitted work, taxes, dates, and remaining exclusions.
A useful quote specifies whether the job includes preparatory work, concrete and placement, finishing, joints, curing/protection and closeout. The NRMCA/ASCC pre-construction checklist resources inform the construction categories below; our shorter tool is for homeowners, not a design document.
Prepare a contractor project brief
Start with project requirements. If reviewing a received bid, mark what that bidder explicitly includes, excludes or leaves unclear. A status entered here is not a contractor commitment. This calculator does not submit the brief itself; avoid entering sensitive information. See our Privacy Policy for site analytics.
Open the 16-item contractor quote checklist
Without JavaScript, open this checklist and print from your browser. Work items are questions until confirmed in a written contractor proposal.
Compare two or three contractor quotes
Use two or three bids for the same footprint and written slab specifications. Enter only written quote amounts or your separately obtained prices for documented excluded work. Unknown work and costs remain unresolved. For bids meeting all documented comparison checks, the tool shows the price spread, but does not choose a contractor or fetch price data. Its comparison calculations run locally; avoid entering sensitive information.
Open each contractor to enter or review its written bid. Closing a section keeps your answers.
Printable comparison worksheet without JavaScript
For each bidder, record contractor name, quote date, quoted amount, tax included/excluded, matching slab specifications, all required work included/excluded/unknown, whether allowances or other variable charges remain unresolved in the quote or separately obtained omission prices, exact cost of known exclusions, validity date and warranty. Unresolved allowances or unknown required costs make the comparable total incomplete. Do not assume zero, and do not rank incomplete quotes.
Why concrete slab costs vary by region
Two equal-size slabs can need different work even at the same published square-foot reference. Weather during placement, ground conditions, delivery access and local requirements change what contractors must allow for. No national multiplier turns the $6–$12 editorial reference into a verified regional quote.
- Hot or cold placement weather: What placement window, temperature protection, curing method and potential schedule changes are included? NRMCA Concrete in Practice covers hot-weather (CIP 12) and cold-weather (CIP 27) concreting.
- Ground and water conditions: Who is responsible for assessing grade, drainage, excavation, base material, compaction and unsuitable soil? A generic per-square-foot figure does not establish that these are included.
- Concrete delivery and access: Ask your local supplier for the specified mix and volume, delivery minimum, short-load or waiting fees, truck reach and any required pump or extra handling. Compare an actual delivered quote, not a list price alone.
- Permits and intended loading: Check the local building department and ask who handles approvals and inspections. A vehicle-bearing pad or building foundation may need a qualified design; DOE climate-specific foundation guidance is context for building assemblies, not a patio design or local permit determination.
These are scope and scheduling questions, not published regional surcharges. Give each contractor the same project description and record what is included, excluded or uncertain in the project brief.
Concrete slab cost by state: how to obtain a usable local price
A state's name alone does not determine an installed slab quote. For a usable city- or state-specific estimate, request two or three written, same-scope bids covering the same location, intended use, dimensions, specified slab details and site conditions.
- Describe one job. Specify the footprint and purpose; have the contractor confirm thickness, base, edge details, reinforcement, finish and site access appropriate to the actual project.
- Request a complete price. Ask which demolition, grading, materials, delivery/pumping, labor, permits, taxes, cleanup and minimum charges are included; list each exclusion and allowance rather than assuming zero.
- Confirm dates and responsibilities. Record the written quote date, stated validity, schedule, permitting party and change-order terms; then use the bid comparison to identify unresolved differences.
For concrete sold by volume, request a separate local ready-mix supplier price with its delivery terms; the per-yard examples above are Nebraska and Michigan supplier snapshots, not state averages. CalcShed does not have a representative 50-state dataset of completed residential slab invoices.
Why CalcShed retired the former state-price table
The original CalcShed series multiplied HomeGuide's broad national editorial slab reference by USACE Civil Works geographic factors. That produced modeled sensitivity scenarios, not sampled homeowner quotes. The archived helper labels its factors March 2026, but the original March 2026 Table 3 values remain unauthenticated and unverified; earlier independent checks could only match the 2025 numbers. We do not use these dollar projections in current estimates.
The historical model is retained for audit, not presented as current residential price evidence.
DIY concrete slab or professional installation?
DIY can remove some hired labor expenses, but no verified nationwide fixed savings percentage applies to all projects. A small pedestrian pad is different from a load-bearing equipment pad or large continuous pour or engineered slab. Examine the material, tools, crew, weather, site work, finish and curing responsibilities before deciding.
Reproducible small-pad example: a 4×8-ft pad at a uniform 4 inches contains 10.67 ft³ and takes about 18 specified 80-lb QUIKRETE bags before allowance. For your material subtotal, multiply 18 by the actual local price per 80-lb bag. That subtotal still excludes taxes, delivery, excavation, base material, forms, equipment, other materials, your labor and any site/finish requirements; retail availability and price vary. Do not treat this bag-only amount as an installed-project price.
For perspective, a 20×20-ft four-inch slab requires about 223 bags weighing 17,840 lb dry before allowance, with substantial mixing and placement logistics. Bag quantity alone does not decide who can safely perform a project.
Follow the product manufacturer's mixing/placement directions, NRMCA curing guidance, and 811 utility-locate procedures before digging. Wet concrete can cause serious skin injury; follow product safety instructions. For vehicle, load-bearing or complex projects, obtain qualified project design and contractor quotes.
Compare itemized work with concrete contractors on Angi (Paid link).
U.S. ready-mix concrete price trends, 2020–2026
The BLS ready-mix concrete Producer Price Index (WPU1333) increased 38.7% from August 2020 to August 2026 and 2.3% from August 2025 to August 2026. These changes measure producer selling-price indices, not completed residential slab costs or dollars per cubic yard.
| August year | Index (1982=100) | Change vs previous August |
|---|---|---|
| 2020 | 285.000 | Reference year |
| 2021 | 302.169 | +6.0% |
| 2022 | 332.919 | +10.2% |
| 2023 | 367.558 | +10.4% |
| 2024 | 386.394 | +5.1% |
| 2025 | 386.359 | −0.01% |
| 2026 | 395.186 | +2.3% |
Source: BLS via FRED WPU1333 data, not seasonally adjusted (1982=100). Identical-month comparisons, not annual averages. As checked October 14, 2026; later releases may revise this series.
Why published concrete slab cost estimates differ (2026)
Each publication describes a different cost model, job type, observation date or included work. The table compares published installed cost references, not independent, matched national contractor invoices. Do not average these rows as if they sampled one common scope.
| Publisher (source date) | Published range / sq ft | Scope and comparability |
|---|---|---|
| HomeGuide (Feb 2026) | $6–$12 | Broad installed-slab editorial range; CalcShed's arithmetic benchmark |
| Concrete Network (Jul 2026) | $6.50–$10.50 | Plain slab/poured concrete; verify site inclusions |
| Angi (Apr 2026) | $4–$8 | General slab editorial figure, not identical standardized work |
| This Old House (Mar 2026) | $4–$8 | General slab guide; overlap is not independent corroboration |
| Modernize (Aug 2026) | $5–$14 | Broad 2026 project and foundation coverage, scope varies |
| Homewyse (May 2026) | $10.33–$12.65 | May 2026 modeled basic installation; excludes significant excavation, gravel/base and compaction |
Why CalcShed uses HomeGuide's $6–$12: it is a published, recognizable U.S. installed-slab planning reference and supports transparent multiplication. It is not a discovered national median or proof every project includes excavation, reinforcement, finishing and delivery. The right decision is to compare written local quotes on the same work.
CalcShed methodology, formulas and source limitations
- Currency and source: All amounts are USD. Installed-cost examples multiply footprint area by HomeGuide’s $6–$12-per-square-foot range, published February 3, 2026. CalcShed has not conducted a nationwide contractor-price survey.
- Area and volume: area (ft²) = length (ft) × width (ft). Geometric concrete (yd³) = area × uniform thickness in inches ÷ 324. Volume does not include footing/edge variations, waste, supplier order rounding or truck minimums.
- Pricing display eligibility: only nonstructural patio/pedestrian flatwork and simple non-load-bearing pads, with each side 10–50 feet and an area of 100–1,500 sq ft, and no known major complications. These are conservative CalcShed editorial coverage limits, not validated contractor minimums or market price cutoffs. Other valid entries retain geometry, without a highlighted personalized installed-price result.
- Materials: QUIKRETE documents an approximately 0.60-ft³ yield for its specified 80-lb mix. Manufacturer yield and actual bag counts belong to the separate Bag Calculator.
- Supplier price examples: January 2026 posted lists from Gehring and Grand Rapids Gravel are specific local product-list examples. Concrete Financial Insights' 2025 $179.95 index is a four-producer weighted index, not a standard retail delivered rate.
- Trend index: BLS WPU1333 is a not-seasonally-adjusted producer-price index (1982=100), using the listed August observations each year. +38.7% and +2.3% are ratio calculations, not household installed-slab inflation forecasts. Data checked October 14, 2026 and subject to revision.
- Quote-scope guidance: NRMCA/ASCC pre-construction checklist informs the item categories; the interactive homeowner brief is not an engineering design, price guarantee or certification.
- Retired geographic and wage model: previous state-price scenarios used USACE Civil Works factors, and the former Affordability Index divided modeled slab prices by gross hourly wages. Neither measured local residential contractor bids or household affordability. Those outputs are retired from current cost guidance; the legacy #index link now goes to practical quote planning. The source-history limitations are explained above.
Review and update policy: source prices are publication snapshots and must be rechecked before release and periodically thereafter. An active quote is controlled by the supplier/contractor's stated scope and date. We do not add material and site-preparation subtotals to an installed editorial benchmark without identifying what is already included.
Frequently asked questions
How much does a concrete slab cost per square foot in 2026?
HomeGuide publishes $6–$12 per square foot installed as a U.S. cost-guide benchmark. For 400 sq ft, multiplying that range gives $2,400–$4,800. This is a planning illustration, not a verified national median or a contractor quote with standardized inclusions. See the source and scope comparison.
How much does a 12×12 concrete slab cost?
A 12×12-ft footprint is 144 sq ft. At the attributed $6–$12/sq-ft reference, the arithmetic is $864–$1,728. At a uniform 4-inch thickness it contains 1.78 yd³ of concrete before ordering allowance. Contractor setup charges and site work may change the actual bid.
How much does a 20×20 concrete slab cost?
A 20×20-ft slab covers 400 sq ft. Applying the published benchmark gives $2,400–$4,800 as a planning illustration. At a uniform 4 inches it requires 4.94 yd³ geometrically, before waste or supplier rounding. Actual bids depend on access, preparation, reinforcement, finish and included work.
How much does a 30×40 concrete slab cost?
A 30×40-ft footprint is 1,200 sq ft, producing $7,200–$14,400 by benchmark multiplication and 14.81 yd³ of raw concrete at 4 inches. These figures do not establish the installed cost of a garage, shop or engineered foundation. Confirm design and obtain a scope-matched contractor bid.
How much does a small 4×8 concrete pad cost?
A 4×8-ft pad is 32 sq ft. At 4 inches it requires 0.40 yd³ of concrete, or approximately 18 QUIKRETE 80-lb Concrete Mix bags using the manufacturer's 0.60-ft³ yield, before allowance. A simple area×national-rate calculation is especially unreliable for small hired jobs because minimum setup and delivery charges may dominate.
How much does a 2,000-square-foot concrete slab cost?
Multiplying 2,000 sq ft by the published $6–$12/sq-ft reference gives $12,000–$24,000, but this is benchmark arithmetic, not a reliable large-project bid. At a uniform 4 inches the geometric volume is 24.69 yd³. Foundations, reinforced floors, thickened edges and other structural requirements need project-specific design and pricing.
How much does a cubic yard of ready-mix concrete cost?
Prices depend on the supplier, mix and delivery terms. For example, two January 2026 local supplier lists show a $148/yd³ list price for Gehring’s SG-3000 sand/gravel mix (Nebraska) and a $198/yd³ list price (Grand Rapids Gravel, Michigan). These are distinct local posted prices, not a national delivered-price range. Short-load, haul, taxes and other charges can change the total; see cost per yard.
How much does a 10-yard truckload of concrete cost?
For an illustrative 10 yd³ order, the material-line calculation is 10 × your supplier's per-yard price. At Gehring's listed $148/yd³ for its SG-3000 sand/gravel mix, that would be $1,480 before applicable taxes, delivery conditions and other fees. Trucks do not all have identical legal or practical delivery capacities; confirm availability, load terms and charges with the local supplier. Use the Ready-Mix Calculator for ordering inputs.
Is bagged concrete or delivered ready-mix cheaper?
There is no defensible nationwide break-even volume. Compare actual bag prices, required bag count, handling and mixing labor with a supplier's complete ready-mix quote, including minimums and delivery charges. For scale, a 20×20-ft, 4-inch slab would take about 223 QUIKRETE 80-lb bags before allowance. See the Concrete Bag Calculator for detailed bag planning.
What does labor cost to pour a slab?
The published $6–$12/sq-ft reference is an installed-cost benchmark, not a separate labor quote. We have not verified a nationally comparable labor-only slab rate with a consistent scope. Ask bidders to identify site preparation, formwork, placement, finishing, joints, curing, equipment and cleanup, and compare totals on the same included work rather than subtracting generic material prices.
How thick should a concrete slab be?
There is no universally correct thickness for every patio, shed, driveway, garage or foundation. The familiar 4-inch example on this page is a quantity illustration, not a design specification. Required thickness, edge treatment, base and reinforcement depend on loading, soil, climate, use and applicable local requirements. Obtain a project-appropriate specification before ordering.
Does a 6-inch slab cost 50% more than a 4-inch slab?
At the same uniform footprint, increasing thickness from 4 to 6 inches increases concrete volume by 50%: a 20×20-ft slab goes from 4.94 to 7.41 yd³. That does not mean the entire installed project costs 50% more, because site preparation, equipment, finishing, mobilization and other items are not necessarily proportional to volume.
How soon can I walk, park or build on a new slab?
There is no universal loading time. NRMCA explains that concrete curing maintains moisture and temperature and commonly continues 3–7 days or as specified. A 28-day strength-test reference is not a blanket rule for first use. Walking, vehicle use and structural loading depend on the mix, weather, curing, design and required strength. Follow the contractor or responsible designer's instructions.
Can the slab cost benchmark price a garage or house foundation?
Not reliably as a complete project. A garage or foundation can require engineered loads, footings or thickened edges, reinforcement, moisture control, excavation, inspections and other scope absent from a simple flatwork illustration. Use the area and volume as geometric inputs, but obtain project-specific design and itemized quotes rather than accepting a basic price-per-square-foot number as the total.
What should a concrete slab contractor quote include?
Confirm the actual scope, including excavation/removal, base and compaction, formwork, reinforcement where specified, concrete mix, delivery/pumping, finish, joints, curing, permits, site access and cleanup. Mark each item included, excluded, allowance, unclear or not applicable. Compare bidders on equivalent completed work; use the page's contractor brief to capture differences.
Do I need a permit or utility locate for a concrete slab?
Permit requirements depend on the local authority and the project's use, dimensions and structural function. Check with the relevant building department before work starts, and address any HOA restrictions separately. If excavation or other digging is planned, use 811 to request underground utility marking and follow your state's notice requirements. A permit exemption does not mean buried utilities are absent.