Marine Cost

Boat Manufacturing Cost Estimation: Building a Defensible Quote Per Hull

What actually drives cost per hull, how to build a quote that survives scrutiny, and the estimating errors that erase a builder's margin.

Cost per hull in composite boatbuilding splits into five buckets: direct materials, direct labor, tooling amortization, rework and scrap, and overhead. On a typical 12 meter production powerboat selling for 340,000 dollars, materials run 32 to 40 percent of factory cost, labor 28 to 36 percent, tooling amortization 4 to 8 percent, rework 3 to 9 percent, and overhead the balance. The dangerous line item is labor, because it is the one estimators anchor on optimism. Price the hours first using the Hull Layup Labor Hours and Outfitting Labor Hours calculators, then attach a fully burdened rate, not a bare wage.

Direct material cost is more than resin and glass. On an infused hull, resin and reinforcement might be 14,000 dollars, but core, consumables, and hardware often match it. Vacuum bag, flow media, tacky tape, and tubing are single use and add 8 to 14 percent on top of resin. Gelcoat and coatings can be 3,500 to 6,000 dollars per boat. Add engines, drives, electronics, and upholstery and purchased content alone can exceed 45 percent of sell price on an outboard cruiser. Estimate resin from the Resin Infusion Material Estimate calculator and coatings from Marine Coating Coverage, then add a 10 percent purchasing waste factor.

Labor cost hinges on the burdened rate, not the hourly wage. A laminator earning 26 dollars an hour costs 41 to 47 dollars burdened once payroll tax, benefits, workers comp at marine rates, supervision, and idle time are loaded. If a hull needs 93 layup hours, 60 outfitting hours, and 20 propulsion install hours, that is 173 hours. At 44 dollars burdened, labor is 7,612 dollars. Estimators who quote at the 26 dollar wage understate that same labor by 3,100 dollars per boat, which on six boats a month is 224,000 dollars a year of vanished margin.

Tooling amortization is real cash you must recover per unit. A hull and deck mold set for a 12 meter boat can cost 180,000 to 350,000 dollars and survive perhaps 300 to 500 pulls before surface degradation. At 400 pulls on a 260,000 dollar mold, amortization is 650 dollars per hull. Builders who omit this because the mold is already paid for still need to fund the replacement, and forgetting it means the next mold comes out of profit. Spread the tooling cost across a realistic pull count, not the number you hope to hit.

Rework and scrap quietly eat the quote. Dockside rework, print-through, delamination, cosmetic defects, and wiring faults, commonly costs 3 to 9 percent of factory cost, and on a troubled model it climbs past 12 percent. Use the Dockside Rework Cost calculator to price a defect honestly: a delamination repair might be 6 hours of labor, 220 dollars in materials, and a two day schedule slip that pushes the launch date. Estimate rework as a line item, not a rounding error. Yards that pretend rework is zero discover the true number in their year end margin, not their quote.

Overhead and machine time round out the model. Shop overhead, rent, utilities, climate control for cure, cranes, and the paint booth, is usually applied as a rate per direct labor hour or per square foot of floor time. Curing occupies floor and mold capacity even with nobody touching the part, so the Composite Cure Schedule Time calculator matters to cost, not just schedule: a 20 hour tool occupancy on a bottleneck mold has an opportunity cost equal to the margin of the boat it displaced. Convert takt from the Vessel Production Takt Time calculator into an overhead absorption rate per hull.

Build the quote from the bottom up and stress test it. Sum burdened labor, material with waste, tooling per pull, expected rework, and absorbed overhead, then add target margin last. Sanity check against price per kilogram of finished boat: production composite powerboats often land between 22 and 45 dollars per kilogram of light ship weight, so a 6,800 kg boat under 150,000 dollars of factory cost deserves suspicion. If your bottom-up number and your top-down ratio disagree by more than 15 percent, one of them is wrong and you find out before you sign.

Estimates go wrong in predictable places. The three biggest are anchoring labor to wage instead of burdened rate, using a first-article build time as the steady-state rate when learning curve gains of 15 to 25 percent per doubling have not happened yet, and treating consumables and rework as noise. A fourth killer is forgetting that engines and electronics inflate with lead time and tariffs between quote and build. Lock material prices with a validity window of 30 to 60 days, quote labor at demonstrated steady-state hours, and carry a named contingency of 4 to 6 percent rather than padding invisibly inside each line.

Published 2026-07-01.