Bags vs Ready-Mix Concrete: The Real Break-Even Math
Updated August 2026
Bags win under about half a cubic yard (22 or so 80 lb bags). At a full yard, the ready-mix truck usually matches the price of the bags alone, before you count the mixer rental or your Saturday. Every big-box aisle sells the dream of saving money with bags; here's where it's true.
The three ways to buy a yard of concrete
| Method | Cost for 1 yd³ (2026, typical US) | Your labor |
|---|---|---|
| 45 × 80 lb bags, hand-mixed | $280–320 in bags | Brutal: 3,600 lb hauled twice, ~5–8 hrs mixing |
| Bags + rented mixer | $280–320 + $70–100 rental | Hard: still hauling every bag |
| Ready-mix short load delivered | $250–400 (incl. short-load fee) | Wheelbarrow it from the truck, done in an hour |
Read that again: at one cubic yard, the truck is usually price-competitive with the bags alone, before you count the mixer rental, your Saturday, or your back.
The break-even rules
- Under ~0.5 yd³ (≤ 22 bags): bags win. Delivery fees dominate small loads; mixing 10–20 bags is a manageable morning.
- 0.5–1 yd³: gray zone. Bags still work if the pour tolerates batches (footings, post runs). For one monolithic slab, lean truck; cold joints between batches are weak points.
- Over 1 yd³: get ready-mix quotes, full stop. Also consider a U-cart (haul-it-yourself trailer of wet mix, ~$150–250/yd) if a truck can't reach you.
What people forget
- Consistency: a slab made of 50 hand-mixed batches has 50 slightly different water ratios. Trucks deliver one uniform, plant-batched mix with a specified strength (order 3,500–4,000 psi for driveways).
- The clock: concrete doesn't wait. If your mixing rate can't keep a wet edge on the pour, you get cold joints. A truck places a yard in minutes.
- Short-load fees are negotiable-ish: fees drop fast as volume rises. 2 yards delivered often costs barely more than 1.
- Hidden bag costs: pallet delivery fees from the big-box store, a second truck trip because 45 bags exceed your payload, wrecked wheelbarrow tires.
Run your project through the bag calculator (it flags the ready-mix zone automatically), the slab calculator for pad sizes, or bags in a yard when you already have a yardage quote.