Work Orders: Authorizing and Tracking a Job

For service and trade businesses especially, a lot of work still gets authorized with nothing more than a phone call or a text message. A work order puts that authorization in writing. That is not because verbal agreements are worthless, but because they are impossible to point back to once a disagreement starts.

What a work order actually does

A work order formally authorizes specific work to begin, and documents what was agreed: the scope, who requested it, any relevant reference (a property, a unit, an asset ID), and ideally the price or rate. It sits between the estimate or quote stage and the invoice. The estimate proposed the work, and the work order authorizes it to actually start.

Work orders are used in two directions. A contractor issues one to its crew to schedule a job. A customer or property manager issues one to a contractor to request work. Both use the same idea: a clear, numbered record of one job.

What to include

• A clear description of the work. Specific enough that "was this actually part of the job?" has an obvious answer later.
• Who authorized it. A name, and ideally a signature or written confirmation, particularly for work initiated by phone or in person.
• Reference details. A property address, unit number, equipment ID, or whatever ties the work to a specific location or asset.
• Pricing or rate, if agreed at this stage rather than left for the final invoice.
• A work order number, so it can be referenced later on the invoice, closing the loop between authorization and billing.
• Dates. Request date, planned start, and expected completion.
• Materials and who supplies them.
• A spending limit, such as "do not exceed $600 without approval."

Our work order generator covers this layout.

Worked example: plumbing repair

A property manager calls a plumber about a leaking pipe in unit 4B.

Work order WO-2026-0215

• Location: 18 Elm Street, unit 4B.
• Authorized by: R. Patel, property manager, by email on May 6.
• Work: replace 1.5 m of leaking copper pipe under the kitchen sink and test for leaks.
• Rate: $75 per hour, parts at cost plus 10%.
• Not-to-exceed: $500 without further approval.

On site, the plumber finds that the shutoff valve is also corroded. That is outside the written scope. He phones, then confirms by email: "Replace shutoff valve, additional 0.5 hour plus $18 part." Mr. Patel replies "approved."

Final billing:

• Labor: 2.5 hours × $75 = $187.50. (2 hours for the pipe and 0.5 hour for the valve.)
• Pipe and fittings, cost $32: $32 × 1.10 = $35.20.
• Valve, cost $18: $18 × 1.10 = $19.80.
• Subtotal: 187.50 + 35.20 + 19.80 = $242.50.
• Under the $500 limit, so no further approval was needed, and the valve extra is documented.

The invoice cites WO-2026-0215 and the added approval. If the owner questions the valve charge, the email trail answers it. Tax is added if it applies in your area. Check the exact rules with an accountant. You can verify the invoice arithmetic with the invoice calculator, and the markup with the markup calculator.

Why it matters more than it seems

The value of a work order shows up specifically when something is disputed: a client claims they never approved an add-on, or asks why a charge appears that they do not remember discussing. A signed or confirmed work order is the difference between "he said, she said" and a clear, dated record both sides can point to. It also reduces invoice disputes and speeds up payment.

Step-by-step: using a work order

1. Receive the request and confirm the scope in plain words.
2. Agree the price basis: fixed price, hourly, or a cap.
3. Create the work order with a number and send it for confirmation.
4. Wait for a reply, signature, or written approval before starting, if time allows.
5. Record any changes on the order, with dates and approvals.
6. Log time and materials. See timesheets for billing.
7. On completion, get a sign-off from the customer.
8. Invoice citing the work order number. See what to include on an invoice.

For ongoing or emergency work

For trades that often start work before paperwork can be fully arranged, such as an emergency repair, a brief work order confirmed after the fact (by text, by email, on arrival) still captures the same protection, even if it was not possible to get a signature before starting. Send the confirmation the same day.

It's not a replacement for a quote or an invoice

A work order authorizes and documents. It is not a price proposal (that is the quote's job) and it is not a payment request (that is the invoice's job). Used alongside both, it closes the gap between "here's what we agreed" and "here's what actually happened," which is exactly the gap where most billing disputes start. See estimate vs. quote and estimate to paid invoice for the wider flow.

Common mistakes

• Vague scope. "Fix plumbing" cannot be checked. Name the location and task.
• No approval for extras. Get written approval before doing work outside scope.
• No limit. Set a not-to-exceed amount.
• No number. Without a number, matching to invoices gets messy.
• Not keeping copies. Store the signed order with the job file.
• Treating it as a legal contract without checking. A work order may contain binding terms. For larger jobs, ask a lawyer.

FAQ

Who issues the work order, me or the customer?

Either. Some customers send their own, especially property managers and large companies. If not, you issue one.

Is a work order the same as a purchase order?

No. A purchase order authorizes spending for goods or services. A work order describes and authorizes a specific job. They can be linked, with the work order referencing a PO.

Do I need a signature?

It is best, but written approval by email or message also works. Keep the record.

What if the job changes midway?

Add a change note to the work order or issue a revised one. Get approval before continuing.