What does this change order estimator calculate?

It calculates the cumulative budget-creep percentage from pending change orders, estimates the administrative labor cost to process them, and models cascading schedule delay onto downstream trades based on trade dependencies.

How does the cascade delay work?

Each pending change order adds a base delay. The more downstream trades depend on the affected trade, the larger the cascading secondary delay, because crews must wait for revised scopes, approvals, and rework before they can start.

Can I download the risk summary?

Yes. After entering your data, use the Print / Save as PDF button to export a formatted Change Order Risk Summary suitable for owner or client alignment meetings.

How can Space AI reduce change order drift?

Space AI flags scope creep early, auto-routes change order requests, and predicts schedule impact before owners approve, reducing both budget drift and cascading delays.

Free Change Order Impact Estimator

Change Order Schedule Drift & Cost Estimator

Model how pending change orders erode budget and cascade onto downstream trades. Produce a downloadable risk summary before your next owner meeting.

Step 1 — Enter the Variables

Original Trade Contract Value

Pending Change Orders ($)

Labor Rate ($/hr)

# of Pending COs

Downstream Trade Dependencies3

Number of trades affected by changes to this trade

Budget Creep

15.0%of original contract value

Pending change orders add $150K to a $1.0M baseline.

Secondary Delay

42 days

Cascade 2.35x

Admin Cost Impact

$14K

144 hrs @ $95/hr

Change Order Risk Rating

High

Significant budget and schedule exposure. Bundle related changes, issue early schedule impact notices, and escalate before cascading delays hit critical trades.

Cascading Delay Visual

Base delay

18d

Cascade

42d

Total

60d

Change Order Risk Summary

Original Value

$1.0M

Pending COs

$150K

Budget Creep

15.0%

Risk Rating

High

Schedule Impact

Base delay: 18 days · Downstream dependencies: 3 · Secondary (cascading) delay: 42 days · Total estimated delay: 60 days

Recommendation

Significant budget and schedule exposure. Bundle related changes, issue early schedule impact notices, and escalate before cascading delays hit critical trades.

How This Change Order Estimator Works

This tool models the financial and schedule impact of pending change orders so you can walk into owner meetings with clear, defensible numbers.

Original Trade Contract Value

The baseline contract amount for the affected trade. This is the denominator used to calculate the percentage of budget creep.

Pending Change Orders ($)

The total dollar value of change orders that have been submitted, proposed, or are awaiting approval against this trade.

Budget Creep %

Calculated as pending change orders divided by the original contract value. It shows how much the trade scope is growing before work proceeds.

Labor Rate ($/hr)

The fully loaded hourly cost for the people reviewing, pricing, negotiating, and administering the change orders.

# of Pending Change Orders

The count of open change-order requests. More requests mean more administrative overhead and more opportunities for cascading schedule impact.

Downstream Trade Dependencies

The number of trades that cannot start or finish until the changed work is resolved. Each dependent trade multiplies the secondary delay through the cascade factor.