Project delivery

What is buyout in construction?

Buyout is the phase right after a general contractor wins a job when it finalizes and signs subcontracts and purchase orders for every trade and major material, locking in costs against the budget.

Two construction professionals review paper plans beside a tablet at a jobsite workbench.
Plan reviews connect field conditions, drawings, and the next decisions on a job. AI-generated illustration.

Buyout is when a general contractor turns bid-day numbers into signed agreements. Every trade gets a subcontract, every major material gets a purchase order, and each one is compared with what was carried in the estimate. The difference is buyout savings if it came in under, or a buyout loss if it came in over. Until buyout is done, the job's real cost is a guess.

How buyout works

  1. Hand off the estimate to the PM with every sub number, scope assumption, and exclusion.
  2. Re-level the top bidders for each trade with current drawings and any addenda since bid day.
  3. Hold scope review meetings with the chosen subs to confirm inclusions, exclusions, schedule, and insurance.
  4. Write and sign the subcontract with a detailed scope of work.
  5. Issue POs for owner-required equipment and long lead items.
  6. Record each commitment against its budget line on a buyout log.

Example: a buyout log

Buyout log, office building
TradeBudgetCommittedSavings or (loss)Status
Concrete$612,000$598,000$14,000Signed
Steel$840,000$871,000($31,000)Signed, mill price increase
Roofing$295,000$281,500$13,500Signed
Drywall$410,700$410,700$0Scope review Friday
Mechanical$1,120,000PendingCoordinating controls scope

So far the job is net negative $3,500. That is useful to know in month one. The steel overrun may be partly recoverable if the contract has an escalation clause. Otherwise, the PM knows the margin target for the rest of the buyout just got tighter.

The mechanical line is the one to watch. It is the largest trade on the job and still open, because the low bidder and the controls contractor each think the other carries the control wiring. Until that is settled in writing, the PM cannot sign the sub, cannot release the equipment PO, and cannot give the owner a firm date for rooftop unit delivery. Open buyout items on big trades are a schedule risk as much as a cost risk.

What to do with buyout savings

Companies handle this differently. Some move savings straight to profit. Some leave it in the budget as a cushion. On cost-plus and GMP contracts, savings may belong partly or fully to the owner under the contract's savings clause. Whatever the policy, record it clearly, or the job cost reports will hide it.

Common buyout mistakes

  • Signing subs on old drawings. Confirm the set and addenda in the subcontract.
  • Rushing buyout to get crews started, and skipping scope review. Gaps become change orders.
  • Leaving buyout half done for months, so committed cost is unknown.
  • Shopping the bid-day sub's number to others. See bid shopping.
  • Forgetting to collect insurance certificates and required compliance documents before the first mobilization.

Related terms

Buyout follows bid leveling and feeds committed cost, procurement, and cost to complete. Read how to hand off a job from estimating to operations for the handoff piece. Smart Business Automator ties each subcontract and PO to the job budget, so buyout savings and losses show up as they are signed.

Frequently asked questions

What is buyout savings?

The difference when a subcontract or purchase order is signed for less than the amount carried in the estimate for that scope.

Who handles buyout?

Usually the project manager, often with the estimator who built the bid, and sometimes a dedicated purchasing or procurement person.

Does buyout savings belong to the owner?

On lump sum contracts it usually stays with the contractor. On cost-plus and GMP contracts, the contract often shares or returns savings to the owner.

How long does buyout take?

It depends on project size and the number of trades. Many GCs aim to finish most of it in the first month or two, with long-lead items first.

Written and edited by

Maurice Francois writes and edits construction operations guides for Smart Business Automator. More from Maurice on the Scaling Legends podcast.

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