Finance

What is committed cost in construction?

Committed cost is the dollar value of subcontracts, purchase orders, and other agreements a contractor has signed for a job, whether or not the invoices have arrived yet.

An office manager and contractor review invoices with a calculator and laptop in a construction office.
Review invoices, committed costs, and cash timing together before making project decisions. AI-generated illustration.

Committed cost is money that is already spoken for. When a GC signs a $210,000 subcontract with a mechanical sub, that $210,000 is committed the day the subcontract is signed, even though the first invoice may not come for two months. Accounting systems that only record costs when bills arrive will show the job looking cheaper than it really is.

Contractors use committed cost to answer one question early: if we pay everything we have agreed to pay, where does this job land against budget? It is a core input to cost to complete and to estimate at completion.

How committed cost is calculated

For each cost code, committed cost equals the total value of signed commitments, including approved change orders on those commitments. Most reports also show how much of that commitment has been invoiced and how much remains open.

Example: committed cost on a $1.4 million retail build-out
Cost codeBudgetCommittedInvoiced to dateOpen commitment
Mechanical$205,000$214,500$96,000$118,500
Electrical$180,000$176,000$88,000$88,000
Drywall and framing$140,000$151,200$40,000$111,200
Storefront glazing$62,000$62,000$0$62,000

Look at mechanical and drywall. Both are already committed above budget, and only part of the money has been billed. A cost report built only on invoices would show those lines well under budget. The committed view shows a $20,700 overrun across the two lines today, while there is still time to recover it through buyout savings elsewhere, a change order, or value engineering. The storefront line, with nothing billed yet, is a reminder that a zero in the invoiced column does not mean zero cost.

Why committed cost matters

  • Earlier warning. Overruns show up at signing, not 60 days later when the bill arrives.
  • Better WIP. Percent complete and projected margin on the WIP report are more honest when committed cost is included in the forecast.
  • Cash planning. Open commitments are future cash out, so they belong in the cash flow projection.
  • Buyout tracking. Comparing committed to budget during buyout shows the real savings or losses from subcontractor pricing.

Common mistakes

  1. Issuing work by phone or email with no purchase order, so nothing gets recorded as committed.
  2. Not updating commitments for approved subcontractor change orders.
  3. Forgetting to close out commitments when a sub finishes under its contract value, which leaves phantom cost on the report.
  4. Mixing committed and actual cost into one column, which double-counts invoiced amounts.

Related terms

See purchase order, job costing, budget variance, and encumbrance. The guide on how to track committed costs before invoices arrive walks through setup. Smart Business Automator's job costing and WIP views show committed, invoiced, and open amounts by cost code.

Frequently asked questions

Is committed cost the same as actual cost?

No. Actual cost is what has been incurred or invoiced. Committed cost is the full value of signed agreements, including the part not yet billed.

Do labor costs count as committed?

Usually not. Self-performed labor is tracked as actual cost from payroll and forecast separately. Committed cost normally covers subcontracts and purchase orders.

How does committed cost affect cost to complete?

Open commitments are a known part of the remaining cost. Cost to complete is typically open commitments plus forecasted uncommitted costs such as labor and small purchases.

Where is committed cost reported?

On the job cost report, usually next to budget, actual, and projected cost for each cost code.

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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