Contractor Budget Kit
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GENERAL CONTRACTOR

Change Order Price Calculator

Price extra work on a change order correctly with direct cost, markup and contingency.

JOB INPUTS

Enter your numbers

Loading saved values

Materials and subs for the extra

$
Materials and subs for the extra

Labor hours for the change

hrs
Labor hours for the change

Loaded crew rate

$
Loaded crew rate

% added on direct cost

%
% added on direct cost

% reserve

%
% reserve
Results update automatically
CALCULATED RESULTUSD
Change order price$2,851.20
Direct cost$2,160.00
Markup$432.00
Contingency$259.20
FORMULA USED($1,500.00 + 12.0h × $55.00) × (1 + 20.0%) × (1 + 10.0%) = $2,851.20

HOW TO USE IT

How to use the Change Order Price Calculator

  1. 1

    Enter the base cost of the extra.

  2. 2

    Add the labor hours and hourly rate.

  3. 3

    Set the markup and contingency.

  4. 4

    Review the change order price.

THE MATH

Change order price formula

Price = (direct cost) × (1 + markup) × (1 + contingency)

Direct cost combines materials and labor. Markup pays the company and contingency covers surprises. Both are applied in cascade.

PRACTICAL EXAMPLE

$1,500 base, 12 h × $55, 20% markup, 10% contingency

Direct = 1,500 + 660 = $2,160. Price = 2,160 × 1.20 × 1.10 = $2,851.

FAQ

Frequently asked questions

What is a change order?

It's an amendment to the original contract for out-of-scope work.

How do I avoid disputes?

Document scope, price and written client approval.

What markup should I apply?

Often 15-30% depending on risk and size.