Precast Cost

Precast Concrete Cost Estimation: What Drives Cost Per Panel and How to Quote It

A money-first breakdown of precast cost per unit, from mix and rebar to form amortization and repair scrap, and how to build a quote that holds.

Precast cost per unit sorts into six buckets: concrete material, reinforcement and embeds, direct labor, form amortization, scrap and repair, and allocated overhead. For a typical structural wall panel, expect concrete at 12 to 18 percent of cost, steel and embeds at 15 to 25 percent, direct labor at 25 to 35 percent, form amortization at 5 to 15 percent, and overhead plus margin covering the rest. Labor usually beats material as the dominant driver, which is why estimators who quote purely on cubic yards lose money on panel-heavy, embed-rich jobs. Price the labor content, not just the concrete.

Material cost starts from batch volume but the money is in the mix design and the steel. Ready-mix or self-batched 5,000 psi concrete runs roughly 130 to 200 dollars per cubic yard delivered or batched, so a 0.62 CY panel carries about 80 to 125 dollars of concrete. Reinforcement at 0.90 to 1.20 dollars per pound means 90 lb of rebar adds 80 to 108 dollars. Embedded hardware, from lifting anchors to weld plates and coil inserts, is easy to underprice; use the Embedded Hardware Cost calculator to total inserts, plates, and connectors, since a single cast-in lifting system can add 20 to 60 dollars per pick point.

Labor is where quotes live or die, so estimate it by operation, not as a lump percentage. Break the panel into rebar tying, form setup and oiling, placing and finishing, stripping, and yard handling. If rebar alone is 9.5 crew-hours at a fully burdened 45 to 65 dollars per hour, that is 425 to 620 dollars before a single yard of concrete is poured. Run the Rebar Placement Labor calculator to get defensible hours rather than a guess. Add crew idle during cure and the shared time of overhead trades like QC and crane operators, which many estimators forget to load into the panel rate.

Form amortization is the cost most bids get wrong. A custom steel form costing 40,000 dollars amortized over an expected 300 casts is 133 dollars per unit, but if the project only needs 80 panels, real amortized cost is 500 dollars per panel unless you resell or reuse the form. Utilization directly changes this number: a form running at 60 percent instead of 90 percent of its casts spreads fixed cost over fewer units. Add changeover: the Mold Changeover Cost calculator captures the 1 to 4 labor-hours and lost bed time per setup, which on short runs can exceed the per-panel concrete cost.

Scrap, rework, and repair are real money that belong in the base quote, not a surprise at the end. A defect rate of 3 to 8 percent is common, and each repair, from bug-hole patching to spall and crack injection, carries labor plus material plus schedule cost. The Precast Defect Repair Cost calculator lets you attach a dollar figure per defect type; a moderate finish repair might run 40 to 150 dollars, while a full recast wastes the entire unit cost plus disposal. Budget a repair allowance of 2 to 5 percent of direct cost so a normal defect rate does not eat your margin.

Cure time is a hidden cost because it ties up capital forms and bed space. If accelerated curing gets you two casts per bed per day instead of one, you effectively halve the form amortization and fixed overhead per panel. Conversely, a bed sitting overnight at ambient cure carries the full daily fixed cost against a single unit. Quote the throughput you can actually achieve, not the theoretical max; use Cure Time Capacity to model realistic daily casts, then divide daily fixed overhead by that number to get true per-unit burden rather than an optimistic one.

Logistics and storage costs scale with the yard and the road, and both are easy to omit. Yard storage ties up land and handling: a unit sitting 60 days consumes rack space you could have turned over, so load a storage cost tied to days-on-hand using Yard Storage Utilization. Transport is priced per load, so a truck carrying six panels at 900 dollars is 150 dollars per unit, but a weight-limited or length-limited load carrying four is 225 per unit. Run Transportation Load Planning before quoting freight, because assuming a full deck when weight caps you at four pieces silently blows the delivery line.

Assemble the quote from the bottom up and stress-test it. Sum material, embeds, labor hours times burdened rate, form amortization at realistic utilization, a repair allowance, and freight per unit, then apply overhead and target margin, typically 10 to 25 percent depending on risk. The most common estimating failures are quoting on cubic yards while ignoring labor and embed intensity, amortizing forms over hoped-for volume instead of contracted volume, and leaving out repair and storage. A defensible precast quote shows the buyer each bucket in dollars per panel so a change in quantity, mix, or finish repriced cleanly instead of being renegotiated later.

Published 2026-07-01.