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Financialaka: mob costaka: mobilizationaka: startup costs

Mobilization Cost

In Plain English

The upfront cost of getting equipment, workers, and facilities set up at a new job site.

Definition

Mobilization cost is the expense a contractor incurs to set up construction operations at a project site, including transporting equipment and materials, establishing temporary facilities, hiring and relocating personnel, and obtaining required permits. Mobilization is typically billed as a percentage of the contract in the first pay application. Demobilization covers the cost of removing equipment and closing out the site at project completion.

Why It Matters in Bidding

Because mobilization is one of the few line items billed in the first pay application before significant work is in place, it directly drives a contractor's early cash flow and is a common vehicle for front-loading a schedule of values. Owners and lenders scrutinize mobilization percentages, and many public contracts cap mobilization at a set percentage of the contract to prevent contractors from being overpaid early relative to actual progress.

Example

The contractor billed $180,000 for mobilization in the first pay application to cover crane transport, trailers, and site fencing, but the owner's mobilization clause limited the line to 5 percent of the contract value.

Related Terms

General Conditions CostSchedule of ValuesFront-LoadingCash Flow

Frequently Asked Questions

Mobilization covers transporting equipment and materials to the site, setting up temporary offices, trailers, fencing, utilities, and signage, relocating crews, and securing permits and initial submittals. It captures the upfront expense of standing up operations before productive work begins. Demobilization, the mirror-image cost of removing equipment and closing the site at completion, is often estimated alongside it.
Mobilization is usually a dedicated line in the schedule of values so it can be billed in the first pay application. Many owners cap it, commonly in the range of 5 to 10 percent of the contract, and some require it amortized across draws. Inflating this line to improve early cash flow is a form of front-loading that owners actively police.
Both approaches exist. Listing mobilization as a separate line improves transparency and early cash flow, while folding it into general conditions or markup can make a bid look leaner. Public agencies often require it as a distinct, capped pay item. Estimators should match the project's bid form so mobilization is neither double-counted nor omitted from the total price.

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