SettingsSettings for this calculationUS
Your direct material + labor cost for the added scope.
This is the raw cost of the extra work itself, before markup and fees.
Markup applied to the additional work, same as your normal project markup.
Some contractors apply a higher markup on change orders than base contract work, since they involve extra coordination and schedule disruption.
A flat fee covering paperwork, re-scheduling, and coordination overhead.
Many contracts specify a flat processing fee per change order regardless of its size, since the administrative overhead is similar either way.
Total change order cost
$2,400
- Markup amount
- $300
They open the calculator with your figures already in it
Change Order Cost Calculator: 2,400 $ (total change order cost) — shown in imperial, US market. The link sets both, so the result they see is the one on your screen.
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How this was calculated
Formula source(s)
- Total change order cost = additional work cost x (1 + markup percent / 100) + administrative fee
Inputs used
- Additional Work Cost
- 2000
- Markup (%)
- 15
- Administrative Fee
- 100
Intermediate steps
- Markup amount
- $300
What this calculation does not cover
- Markup lands on the added work cost alone — the administrative fee is added after it and is never marked up, so a contract that allows markup on the processing charge will settle slightly above this figure.
- One percentage covers the whole variation, with no split between overhead and profit and no separate rate for subcontracted work; where a sub's price already carries its own uplift, no second tier is stacked on top of it here.
- Time is absent from the arithmetic. Nothing is priced for extra days on site, extended preliminaries, or the disruption to work already sequenced around the original scope, which on a mid-project change is often the larger number.
- The flat fee is counted once per run. Several small variations that each trigger their own charge, or one order bundling unrelated items, have to be worked through individually rather than as a single lump.
- Deductive changes have no route in: the added work cost cannot be taken below zero, so a credit for scope removed has to be handled as its own line away from this page.
- The added work cost is entered as one figure, so nothing distinguishes short-notice material pricing, restocking on cancelled orders, or remedial work to undo what was already built — those belong inside the number you type, or they are missing from the total.
Computed in your browser — nothing you enter is uploaded. Presented in US customary units and US trade terminology. Where a formula follows a published standard, that standard and its edition are cited beside it on this page; where none governs, the page says so. Local amendments override model codes — verify against the code in force where you build.
Sources checked 2026-09-05 · in the site-wide review of 2026-09-06 · v1.0.1
Regulatory standards & verification citations1
- Total change order cost = additional work cost x (1 + markup percent / 100) + administrative fee
Cite this page
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