Field

What is work order in construction?

A work order is a written authorization to perform a specific piece of work, listing what to do, where, when, and how it will be paid, used for service calls, small jobs, and task orders under a larger contract.

Two construction professionals review paper plans beside a tablet at a jobsite workbench.
Plan reviews connect field conditions, drawings, and the next decisions on a job. AI-generated illustration.

A work order tells a crew or a contractor to do a specific task. It names the location, the scope, the schedule, and the basis of payment: a fixed price, time and materials, or rates already agreed in a master contract. Service contractors (HVAC, plumbing, electrical) run on work orders. GCs and facility owners use them for small projects and repairs that do not need a full contract.

The term also gets used for a change to existing work. In that sense a work order overlaps with a field order or a change order. Make sure everyone means the same thing before anyone starts work.

How a work order works on a real job

Say a property management company has a master service agreement with a plumbing contractor. A tenant reports a leaking water heater. The property manager issues a work order: unit address, problem description, priority level, not-to-exceed amount of $1,800, and the agreed hourly rates. The dispatcher assigns a tech, who replaces a valve, logs 2.5 hours and parts, and has the tenant sign. The office invoices against the work order number, and payment matches cleanly because the owner's system already has the number on file.

What a good work order includes
FieldWhy it matters
Work order numberTies invoice, timesheet, and payment together
Location and contactGets the right crew to the right place
Scope descriptionDefines what is and is not included
Pricing basis or not-to-exceed amountPrevents billing arguments
Requested and completed datesSupports service levels and scheduling
Authorization signatureProves the work was requested
Completion sign-offProves the work was done

Work orders on larger projects

On commercial and public work, owners sometimes use job order contracting or task order contracts: one master agreement with unit prices, then individual work orders for each project. Each work order works like a small contract, with its own scope, price, and schedule under the master terms. For GCs, internal work orders are also how a PM tells a self-perform crew to do extra work, such as patching after another trade, so the cost can be tracked to a separate cost code and billed back.

Common mistakes and disputes

  1. Starting on a phone call. If the work order is not issued before work starts, the payment basis is open to argument.
  2. Vague scope. "Fix leak" invites a dispute when the fix turns into a repipe.
  3. Exceeding the not-to-exceed amount. Stop and get written approval before going over, or expect a short pay.
  4. No completion sign-off. Without a signature or photo, the customer can claim the work was never finished.
  5. Losing small work orders in big jobs. Extra work done under a work order on a project needs to be billed, or it becomes free work. Log it the same way you log a back charge.

Related terms

See purchase order, time and materials contract, written directive, and invoice approval. Smart Business Automator links work, time, and invoices to the same job and reference number, so extra work orders do not slip through billing.

Frequently asked questions

What is the difference between a work order and a change order?

A work order authorizes a task, often standalone or under a master agreement. A change order modifies an existing contract's scope, price, or time. Some companies use work order for both, so define the term in your contracts.

Is a work order a contract?

It can be. A signed work order with scope and price can be binding on its own, or it may operate under the terms of a master service agreement.

What is a not-to-exceed amount on a work order?

A cap on what the customer will pay without further approval. Work beyond it needs written authorization.

Who issues a work order?

Usually the customer or owner, such as a property manager or facility team. Contractors also issue internal work orders to their own crews.

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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