Change orders
A change order should protect the contractor from extra scope, hidden schedule impact and margin loss while giving the client a clear reason for the price change.
A change order is not just a note that says "extra work = extra money." It is the priced record of a scope change. That means it has to recover the labor, material, equipment, subcontractor, supervision, admin drag, risk and sometimes schedule disruption created by the change. If the contractor only prices the obvious direct cost and ignores everything else the change creates, the job can lose margin even while the client thinks the extra work was "paid for."
Change order price = direct labor + labor burden + materials + equipment + subcontractors + overhead + markup + contingency + tax where required.
The exact format varies, but the logic should stay visible. Hidden pricing makes approval harder and internal review weaker.
Write exactly what changed: added work, deleted work, revised quantity, different material, changed access, out-of-sequence work, rework requested by the client or something else. The clearer the description, the easier it is to justify the cost. Vague change descriptions create payment friction later because no one can tell what the price is actually for.
List labor hours by role, material quantities, equipment hours, subcontractor quotes, disposal, trucking, permits, small tools, supervision and any job-specific support cost triggered by the change. If the cost exists only because of the changed scope, it belongs in the pricing logic somewhere. If you need to separate field production from broader support cost more cleanly, use the direct vs indirect cost guide.
Use the labor burden calculator for loaded labor cost and the equipment hourly rate calculator for machine recovery.
Some changes cost more because they happen at the wrong time, not because the quantity is large. Out-of-sequence work, remobilization, standby, multiple site visits, partial demolition, punch-list style access or client-caused delay can all change the cost structure. If the change affects sequencing, note it explicitly instead of trying to hide it inside a padded labor number.
Change orders still consume estimating time, project management, purchasing, accounting and communication. A clean markup is not greedy; it is the mechanism that recovers overhead and profit on extra work. If the change adds unusual uncertainty, add a visible contingency line instead of pretending the scope is cleaner than it is. The contingency guide helps separate genuine uncertainty from missing cost structure.
Where local rules require it, show tax or VAT separately. Mixing tax into the profit layer can distort internal margin analysis and make the client-facing number harder to understand.
A professional change order should include the description, reason, breakdown, schedule impact, exclusions, validity period and approval status. If your contract allows immediate emergency work before signature, note that circumstance clearly. Otherwise, large extra work is much safer when approved in writing before it is executed.
If you want to see what the actual change-order worksheet should contain before you worry about the commercial math, use the construction change order template guide. It focuses on the layout, fields and approval structure that should sit around the price buildup.
Sometimes yes, but not always. Small, disruptive or urgent changes may justify different recovery because they consume more management time per dollar of direct cost. The right answer depends on risk and context.
At minimum: a scope-change description, cost buildup, markup, tax treatment, approval status and a clean reference back to the original job. Use the template guide if you want that worksheet structure spelled out.
Yes. A change order can add or deduct scope. The same clarity is valuable when work is removed because contract value, schedule and expectations still change.