Why do construction projects need to accrue unbilled cost?

Because vendors bill on their own calendar, not on the project month end. A subcontractor who worked the last ten days of the month may not send an invoice until the fifteenth of the next one. Without an accrual, that cost lands a period late, the month looks more profitable than it was, and the percent complete computed from cost comes in low. The accrual books the estimate in the period the work actually happened, which is the only way the cost report, the earned value, and the revenue recognized all describe the same month.

How is an unbilled accrual estimated?

From evidence of the work rather than from a bill. Delivery tickets price the material that has arrived, timesheets and daily reports give the hours a time-and-materials crew worked, rental agreements give the daily rate for equipment on site, and a subcontractor pay request or percent complete gives the value of lump-sum work done since the last invoice. The estimate is reviewed line by line at close and is deliberately conservative: it should capture what was received, not what might be received next week.

What happens to an accrual when the invoice finally arrives?

It reverses. The accrual was a placeholder for an invoice that had not arrived; once the real invoice is approved, the estimate comes off and the invoiced amount goes into accounts payable in its place. If the invoice is larger or smaller than the estimate, the difference hits the current period as a true-up. A project that is accruing well sees small true-ups. A project whose accruals keep reversing against much larger invoices has been understating its cost every month, and that is usually the first visible sign of a budget that is quietly behind.

Construction Glossary · Financial & Accounting

UnbilledAccruals

The rebar is on site and the crew worked through the thirtieth, but the invoices will not show up until the middle of next month. An accrual puts that cost in the month it belongs to.

Definition

Unbilled accruals are estimated liabilities a contractor books at period end for work performed or materials delivered on site that no vendor or subcontractor has invoiced yet: month-end subcontractor labor, time-and-materials crews, equipment rental days, and stock already on the ground. They are added to paid and payable amounts so that the incurred cost of the period is not understated, and they reverse when the real invoice arrives.

The invoices lag the work. The accrual closes the gap.

In this month the project took delivery of $1.1M of work and material, but only $0.7M of it has been invoiced by the time the books close. Booking a $0.4M accrual for the rest means the cost report describes the month that actually happened, not the slice of it the vendors got around to billing.

What gets accrued, and from what evidence

An accrual is only as good as the field record behind it. The usual month-end candidates, and the document that prices each one.

Accrual	Typical trigger	Priced from
Subcontractor labor	Lump-sum work done since the last pay request	Percent complete on the sub schedule of values
Time-and-materials crews	Hours worked through month end	Daily reports and timesheets at contract rates
Equipment rental	Machines on site past the last rental invoice	Rental agreement daily or weekly rate
Delivered materials	Stock received, not yet billed by the supplier	Delivery tickets at purchase-order price

Once invoiced, each line moves out of accruals and into accounts payable; together with what has been paid they make up incurred cost.

The field record that prices the accrual

The accrual itself is an accounting entry, and POD does not book it or carry a separate accrual ledger. What POD holds is the evidence an accrual is built from: the daily reports with hours by crew, the deliveries logged on site, and the equipment on the job each day, kept as structured records rather than loose paperwork. At month end the question is no longer which crews worked the last week or what arrived on the twenty-eighth; the record already says so. The actual cost you then confirm, accruals included, is what POD sets against physical progress to read cost performance.

How accruals feed the money flow

Frequently asked questions

Cost the month that happened

Accruals complete the incurred-cost picture. From there the money runs through percent complete, earned revenue, and billing. The guide follows one job all the way around.

The money-flow guide Back to the Glossary