Free Construction Calculators & Tools/Variation/Change Order Calculator

Variation/Change Order Calculator

Calculate variation order pricing with material, labor, overhead, and profit breakdowns. Generate professional VO cost analysis for contract claims.

Original Scope
Original Value: $5,000
Revised Scope

Positive = cost increase, Negative = cost decrease

1.0 = normal, >1.0 = reduced productivity (more labor cost)

Markups

Original Value

$5,000

Variation

+$2,986

Change

+59.7%

Variation Amount

+$2,986

Addition to Contract

Cost Breakdown
Original Value$5,000
Revised Direct Cost$6,600
Overhead (10%)$660
Profit (10%)$726
Revised Total Value$7,986
Change Components
Material Cost Change$600
Labor/Productivity Change$0
Overhead Addition$660
Profit Addition$726

Notes:

  • Variation calculated per FIDIC principles
  • Overhead applied to direct cost only
  • Profit applied to direct cost + overhead
  • Productivity impact affects labor portion of rate
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FINANCIAL DISCLAIMER

This calculator provides INDICATIVE FIGURES for reference purposes only.

Important:

1. Results are based on standard formulas and user-provided inputs. Actual contractual amounts may differ based on specific contract terms and conditions.

About This Calculator

This Variation/Change Order Calculator helps contractors and consultants price variations accurately per FIDIC contract requirements. Build up rates for additional works with detailed breakdowns of materials, labor, plant, overhead, and profit. Essential for managing scope changes in UAE and Gulf construction projects operating under FIDIC Red, Yellow, or Silver Book conditions.

When to Use This Calculator

  • Pricing additional works instructed by the Engineer
  • Building up rates for new BOQ items
  • Preparing daywork claims for emergency works
  • Evaluating subcontractor variation quotations
  • Negotiating fair rates for scope changes

How to Use This Calculator

1

Define scope of variation

Describe the additional or changed work with reference to contract

2

Enter material costs

Input quantities and unit rates for materials with wastage factors

3

Add labor costs

Enter man-hours by trade with applicable wage rates

4

Include plant and equipment

Add equipment hire rates and duration

5

Apply overhead and profit

Add general overhead (typically 10-15%) and profit margin (5-10%)

Typical Scenarios in UAE & Gulf Projects

Dubai Tower Design Change

Pricing a variation to upgrade external cladding from composite panels to unitized curtain wall. Calculator builds rate from aluminum profiles (850 AED/m²), glass (420 AED/m²), seals/fixings (80 AED/m²), installation labor (180 AED/m²), plus 12% overhead and 8% profit, yielding 1,714 AED/m² vs original 950 AED/m².

Abu Dhabi Infrastructure Unforeseen Ground

Rock excavation variation for 2,400m³ discovered during foundation works. Daywork records show 3 rock breakers for 15 days plus hauling. Calculator determines rate of 245 AED/m³ inclusive of plant, operator, and disposal, totaling 588,000 AED variation claim.

Frequently Asked Questions

UAE construction typically applies 10-15% general overhead for site and head office costs, and 5-10% profit margin. FIDIC suggests using actual percentages from the original contract pricing. For variations, consultants often accept 10% overhead + 5% profit (15% total) unless contract specifies otherwise.

Daywork rates should include: basic wage + allowances (as per visa/contract), overtime if applicable, accommodation and transport, insurance and visa costs, and supervision overhead. For plant, include rental, fuel, operator, and mob/demob prorated. Always maintain detailed daywork sheets signed by the Engineer's representative.

FIDIC 1999 Red Book Sub-Clause 20.1 requires the Contractor to give notice within 28 days of becoming aware of the event, and a fully detailed claim within 42 days; late notice can time-bar the claim. In the 2017 edition (Sub-Clause 20.2) the notice period is also 28 days and the fully detailed claim is due within 84 days. Check the Particular Conditions, which often change these periods. The UAE Civil Code also has limitation periods for claims.

Take Your Calculations Further

This calculator reflects the logic built into Arkan's construction management platform.

Last Updated: January 2026

Standards Reference: FIDIC 1999 Red Book Clause 13 Variations and Adjustments (2017 edition Clause 13), UAE Civil Code

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