Construction backlog is one of the clearest signals a contractor has about future workload and revenue. It represents the value of contracted work that has been awarded but not yet completed, and it shapes decisions about staffing, equipment, and bidding long before a project breaks ground.

This article explains what construction backlog is, how it differs from pipeline, bookings, and work in progress, and how contractors can calculate and use it as a forward looking planning tool. It also covers current backlog trends reported by Associated Builders and Contractors, along with practical guidance on how much backlog is healthy for different types of firms.

What is construction backlog

Construction backlog refers to the total value of contracted work a construction company has been awarded but has not yet completed or billed. It includes signed contracts, approved change orders, and any committed work scheduled for completion in coming months or years. Because backlog reflects contracts that are already secured, it differs sharply from projects that are still being bid or discussed.

For a general contractor, subcontractor, or specialty trade firm, backlog offers a forward looking view of workload and expected revenue. Lenders, sureties, and investors often review backlog when assessing a contractor’s financial stability, since a steady backlog suggests predictable cash flow and a lower risk of idle crews.

Construction backlog vs pipeline, bookings, work in progress, and revenue

Backlog is often confused with related terms that describe different stages of a contractor’s workload. The table below outlines how each term is defined and what it actually measures.

How to calculate construction backlog

Backlog in dollar terms

The most direct way to calculate backlog is to add up the value of all signed contracts, including approved change orders, that have not yet been completed or billed. If a contractor has five active projects with a combined remaining contract value of nine million dollars, that figure represents the dollar backlog.

Converting backlog into months of work

Contractors often convert dollar backlog into a time based measure so it can be compared across companies of different sizes. Associated Builders and Contractors converts backlog into months of work using the following formula: current backlog in dollars divided by trailing twelve month revenue, multiplied by twelve. This calculation shows how many months a contractor could continue operating at its current pace using only the work already under contract.

Backlog calculation example

Consider a mechanical subcontractor with two million dollars in signed, uncompleted contracts and trailing twelve month revenue of three million dollars. Dividing two million by three million and multiplying by twelve results in a backlog of eight months. That figure tells the contractor it has roughly eight months of confirmed work at its current revenue pace, before accounting for any new contracts signed along the way. This example is illustrative and specific accounting practices, such as how change orders or partially billed work are treated, can vary between firms.

Why backlog matters for planning and forecasting

Backlog affects far more than a single project schedule. The list below outlines how a well tracked backlog supports broader planning across a construction business.

• Revenue forecasting: Backlog gives finance teams a defensible basis for projecting revenue over the coming months, since the work is already under contract rather than speculative.
• Cash flow planning: Knowing how much confirmed work is ahead helps contractors anticipate billing cycles, plan for material purchases, and manage working capital needs.
• Staffing decisions: Backlog figures help leadership decide when to hire, when to hold steady, and when to prepare for a slower period.
• Scheduling and sequencing: Backlog data helps project managers sequence upcoming work against current crew and equipment availability.
• Capacity planning: Comparing backlog to available resources highlights whether a firm has room to take on more work or is already near its limit.

Using backlog to guide business decisions

Backlog is most useful when it directly informs day to day decisions rather than sitting in a spreadsheet. The list below shows how contractors typically put backlog data to work.

• Hiring and staffing: Rising backlog often signals it is time to bring on additional crews or project managers, while declining backlog can prompt a hiring freeze or a closer look at current utilization.
• Equipment and capital purchases: Firms weigh backlog against planned capital expenditures, since committing to new equipment only makes sense if confirmed work justifies the added capacity.
• Bidding strategy: Contractors compare current backlog to their capacity threshold before deciding how aggressively to pursue new bids, which helps avoid taking on more work than crews and equipment can support.
• Cash flow forecasting: Finance teams use backlog alongside work in progress reports to project incoming billings and plan for expenses tied to active and upcoming contracts.
• Resource allocation: Project leadership uses backlog to decide which upcoming jobs get priority access to key personnel, subcontractors, and equipment.
• Tracking and reporting: Many firms rely on construction accounting, scheduling, or project management software to keep backlog figures current, since manual tracking across multiple active projects can quickly become inaccurate or outdated.

How much backlog is enough

There is no single backlog figure that applies to every contractor. Many firms use a general range of six to twelve months as a starting point, though the right level depends heavily on company size, specialty, and typical contract duration. 

Specialty trade contractors completing short cycle projects may operate comfortably with only a few months of backlog, while general contractors managing large, multi year projects often need a year or more to feel secure.

Conclusion

Construction backlog is more than a running list of signed contracts. Tracked consistently and compared against real capacity, it becomes a practical forecasting tool that informs staffing, bidding, cash flow planning, and scheduling decisions well before a project starts. Understanding how backlog differs from pipeline, bookings, and work in progress, along with knowing how much backlog fits a firm’s specific size and specialty, helps contractors avoid the twin risks of too little work and dangerous overcommitment.

Alliance EDS works with general contractors, subcontractors, and project owners on projects ranging from ground up construction to complex renovations. If your firm is reassessing backlog, staffing needs, or upcoming project capacity, calling us at (720) 484-8181 for an honest conversation costs nothing.

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