Clearstory Construction Industry Blog

Why We Call Them Change Order Requests and Time and Material Tags

Written by Greg Seldon | Jan 22, 2026 7:03:05 PM

Common acronyms for out-of-contract work

Construction loves acronyms, especially when it comes to out-of-contract work. Out of all the options, why did we at Clearstory choose to call our tracking documents a “Change Order Request” and a “Time & Material Tag?"

Key Takeaways

  • Terminology Fragmentation: Subcontractors use nearly 40 different names for the same out-of-contract work documents, leading to massive administrative confusion.
  • Standardization: Using "Time & Material (T&M) Tag" and "Change Order Request (COR)" provides a universal language recognized across the construction industry.
  • T&M Tag Purpose: A T&M Tag documents labor, materials, and equipment used; it verifies work performed but does not automatically grant contract approval.
  • COR Purpose: A Change Order Request is a formal proposal to adjust contract value so that out-of-scope work can be billed in the next cycle.
  • Digital Alignment: Using a centralized platform like Clearstory eliminates naming discrepancies and streamlines the approval workflow between GCs and Subcontractors.

So why Change Order Request and Time and Material Tag? It wasn’t as easy as you think. There are as many different names for CORs and T&M Tags as there are Subcontractors. Just as an example, we sampled one major construction project with 44 Subcontractors in San Jose, CA. Of the dozens of T&M Tags and Change Order Requests that were submitted, Subcontractors called them close to 40 different names.

Here are the different names Subcontractors put on their documents submitted on the project:

Time & Material Tags

  1. Extra work order (5x)
  2. Daily planning and report form
  3. Extra work authorization
  4. Daily rental or extra work report
  5. Service order
  6. Time and material tag
  7. Field work authorization
  8. Daily extra work report
  9. Day work report
  10. Work order (4x)
  11. Order for additional work
  12. Additional work authorization field report
  13. Time and materials extra work
  14. Change order request form
  15. Force account report
  16. Field work order (3x)
  17. Survey service record

Change Order Requests

  1. Change Order Request (12x)
  2. Invoice
  3. Cost Proposal
  4. Request for Change Order (3x)
  5. Change Order (5x)
  6. Change Request
  7. Proposed Change Order
  8. Extra Work Order
  9. Quote
  10. Quotation
  11. CX
  12. LTO
  13. EWL
  14. EBA
  15. FWO
  16. Potential Change Order
  17. Change Proposal
  18. Extra
  19. Change Estimate
  20. Work Orders

Wow! As the General Contractor or end customer in this situation, you can imagine the confusion reviewing 44 differently named documents and logs from each of these Subcontractors.

So why can’t we all just call them the same thing? The short answer is: we aren’t all using the same software or process. Everyone has different vendors where they purchased their software or their paper T&M Tags (à la Dunder Mifflin). Everyone has their own documentation system, cumbersome as it may be.

Why we chose “Time and Material Tag”

How did we choose “Time & Material Tag,” instead of, say, one of the examples listed above? We followed one of our company mottos and we KEPT IT SIMPLE. While many Subcontractors call T&M Tags something different, they all instantly recognize the term: “Time & Material Tag.” It is commonly recognized industry jargon.

From a technical standpoint, a Time & Material Tag serves three primary functions:

  • Documentation: Authorizes that a specific scope of work was performed.
  • Resource Tracking: Lists the exact labor, material, and equipment used.
  • Verification: Confirms hours and field work are accurate (though it is not a final contract approval)
The “field guys” verify the hours are correct and the “office guys” verify the work is out of contract.

Why we chose “Change Order Request”

Choosing “Change Order Request” was an even easier decision. It’s already a universally used term in the construction industry. Many Subcontractors use some form of that term in their documents.

Technically, the Change Order Request (COR) process follows these steps:

  • Submission: The Subcontractor requests a contract adjustment for a specific dollar amount.
  • Review: The customer reviews the request to approve or reject the costs.
  • Resolution: Upon approval, the customer issues a formal Change Order to update the total contract value.

Let’s end the confusion.

Using Clearstory, we finally have the ability to achieve unanimity and simplicity in terminology...for all parties. With Clearstory, everyone’s on the same page: General Contractors and Subcontractors can easily communicate with one another on the job when tracking their T&M Tags and CORs.

Clearstory was built to bridge the existing Change Order Gap in the construction industry. Our automated workflow easily and clearly organizes these two documents for your team and makes it quick and easy for your customer to understand and ultimately approve them!

Clearstory gets us all speaking the same language!

With Clearstory, you won’t just be using the same terms for these very important forms, you’ll actually be sharing them instantly, keeping everyone in the loop.

Frequently Asked Questions

What is a Change Order Request?

A Change Order Request (COR) is a written ask to adjust the contract price, schedule, or scope after work has started. It tells your customer what changed, why it changed, and how much it will cost or delay the job.

How is a Change Order Request different from a Change Order?

A Change Order Request is your proposal. A Change Order is the signed agreement that comes back after the owner or GC approves the request. Think of the COR as the ask, and the Change Order as the final, binding answer.

What details should a Change Order Request include?

  • Project name and location
  • Description of the added or deleted work
  • Reason for the change (unforeseen condition, owner request, etc.)
  • Cost breakdown for labor, material, and equipment
  • Impact on schedule, if any
  • Reference to related Time & Material Tags, RFIs, or drawings

When should I send a Change Order Request?

Send it as soon as you know the work is outside the original contract—ideally before the extra work starts or, at the latest, with your next billing cycle. Early notice keeps cash flow steady and avoids disputes.

Does a signed Time & Material Tag automatically become a Change Order Request?

No. A Time & Material Tag only proves the work happened and the hours are correct. You still need to submit a formal Change Order Request so the office team can price the work and adjust the contract.

How does Clearstory help with Change Order Requests?

Clearstory lets you create, track, and share CORs and Time & Material Tags in one cloud workspace. Everyone—field crews, office staff, GCs, and owners—sees the same document, so approvals move faster and nothing gets lost in email chains.