What is the formula for incurred cost in construction?

Incurred cost equals paid invoices plus approved-but-unpaid invoices (accounts payable) plus unbilled accruals. On a job that has paid $3.2M, holds $0.9M of approved invoices awaiting payment, and estimates $0.4M of work received with no invoice yet, the incurred cost is $4.5M, even though only $3.2M has left the bank. That $4.5M is the actual cost figure that earned value, the cost performance index, and cost-to-cost percent complete all rely on. Reading only the paid figure would understate the cost of the work by $1.3M.

Is incurred cost the same as committed cost?

No, and confusing them distorts every downstream number. Committed cost is the full value of signed subcontracts and issued purchase orders, including the portion not yet performed. Incurred cost counts only the slice of those commitments that has actually been consumed by work done or materials delivered. A $2.0M subcontract that is one quarter performed is a $2.0M commitment but roughly a $0.5M incurred cost. Committed cost warns you about where the money is promised; incurred cost tells you what the work to date has really consumed.

Why does incurred cost matter for earned value and billing?

Because it is the denominator of cost efficiency and the numerator of cost-based progress. The cost performance index divides earned value by actual cost, so an understated actual cost inflates the index and hides an overrun. Cost-to-cost percent complete divides incurred cost by the total estimated cost, so an understated figure also understates revenue recognized. Accruals exist precisely so that work performed in a period is costed in that period, not weeks later when the vendor finally sends the invoice.

Construction Glossary · Financial & Accounting

IncurredCost

The bank statement says $3.2M. The work has already consumed $4.5M. Incurred cost is the number that counts what the job has used, not what the accounts department has gotten around to paying.

Definition

Incurred cost, also called actual cost or ACWP, is the economic value of the work a project has consumed to date, counted regardless of when the cash moves. It is the sum of three parts: invoices already paid, approved invoices still sitting in accounts payable, and unbilled accruals for work or materials received but not yet invoiced. It leaves out open commitments on purchase orders that have not been worked and change orders that have not been approved.

Three layers add up to one actual cost

Against an $8.5M cost budget, $3.2M has been paid out, $0.9M of approved invoices is waiting in accounts payable, and $0.4M of delivered work has no invoice yet. Stack the three and the job has incurred $4.5M. Count only the first layer and you are $1.3M short of the truth.

Paid + AP + Accruals = Incurred
$3.2M + $0.9M + $0.4M = $4.5M

What goes in, and what stays out

Each layer carries a different kind of evidence. Paid has a cleared check. Accounts payable has an approved invoice. An accrual has a delivery ticket or a timesheet and an estimate. Open purchase orders and pending changes have none of these yet, so they wait outside.

Component	What it is	Cash moved?	Counted?
Paid	Vendor and sub invoices already settled	Yes	Yes
Accounts payable	Approved invoices logged but not yet paid	Not yet	Yes
Unbilled accruals	Work or materials received, no invoice yet	No	Yes, as an estimate
Open commitments	Signed POs for work not yet performed	No	No
Pending change orders	Scope not yet approved by the owner	No	No

The open commitments belong to committed cost; the whole circuit from incurred cost to earned revenue to billing is walked in the construction finance money-flow guide.

How POD uses actual cost

POD takes the actual cost figure from the pay applications and cost records you confirm, keeps it apart from open commitments, and sets it against earned value drawn from real physical progress, so the cost performance index, the estimate at completion, and the variance at completion are computed from the actual cost you confirm. The paid, payable, and accrued split is your accounting system's job: POD does not divide the ledger into those three layers for you. What it does is make sure the actual cost you bring in is compared to progress that was measured in the field, not inferred from spending.

Follow the money from cost to cash

Frequently asked questions

Actual cost is only the first link

Incurred cost feeds percent complete, which feeds earned revenue, which is set against what you billed. One guide walks the whole chain with a single worked example.

The money-flow guide Back to the Glossary