Pour a concrete slab yourself, or hire a pro?
The honest answer: DIY saves roughly half the cost — but only if the pour goes right. Here's the real math for both options, and when each one wins.
Cost comparison (4″ slab, ready-mix)
| Slab | Concrete | DIY est.* | Pro installed est. |
|---|---|---|---|
| 10×10 (100 sq ft) | 1.5 yd³ | $348–$548 | $400–$800 |
| 12×12 (144 sq ft) | 2 yd³ | $430–$630 | $576–$1,152 |
| 16×20 (320 sq ft) | 4.5 yd³ | $843–$1,043 | $1,280–$2,560 |
| 20×20 (400 sq ft) | 5.5 yd³ | $1,008–$1,208 | $1,600–$3,200 |
| 24×24 (576 sq ft) | 8 yd³ | $1,420–$1,620 | $2,304–$4,608 |
*DIY = delivered ready-mix (10% overage) + $100–$300 for forms lumber, mesh/rebar, base gravel, and tool rental. Pro = $4–$8/sq ft for a basic slab. Estimates as of June 2026 (US national average) — real quotes vary a lot by region and site conditions.
When DIY makes sense
- Small, non-structural pads — shed bases, AC pads, small walkways (under ~1 yd³, i.e. bag territory).
- You have 2–3 helpers. Concrete sets on its own schedule; a 10×10 pour is a hard 2–3 person job from truck to finish.
- You've finished concrete before — screeding, floating, edging, and timing the trowel are learned skills, and a bad finish is permanent.
- Access is easy — the truck (or your wheelbarrow route) can get close to the forms.
When to hire instead
- Anything structural or load-bearing — garage slabs, footings, driveways that carry vehicles. Thickness, base compaction, and reinforcement need to be right.
- Big pours. Past ~2–3 yd³, placing and finishing outruns a DIY crew before the concrete does.
- Sloped or poorly-draining sites — grading and drainage mistakes cost far more than the labor you saved.
- Permits/inspections apply — pros know the local code (slab thickness, footing depth, vapor barriers).
What the pro premium buys you
Roughly the other half of the bill is crew, forms, finishing skill, and liability: a proper compacted base, correct reinforcement, a flat power-troweled finish, control joints in the right places, and someone to call if it cracks in year one. On a small pad that premium can be a few hundred dollars — on a driveway it's real money, which is why comparing 2–3 local quotes is worth 10 minutes either way: it prices your exact site, and if quotes come back near your DIY cost, the decision makes itself.
Do the materials math first
Whichever way you lean, start with the exact quantity: the concrete calculator gives bags vs ready-mix and cost for your dimensions (or jump to a common size like a 10×10 or 20×20 slab), and the how-much-concrete guide explains the math. Knowing your materials number keeps any quote honest.
Last updated: 2026-07-03.
DIY figures computed from the same verified data as the calculator (QUIKRETE/Sakrete
yields; ready-mix and extras estimates as of June 2026). Pro-install range is a
broad national estimate for a basic 4″ slab — always confirm with local quotes.