WS CostMaster
End-to-End Cost Management for Construction
Estimate budgets, value claims, calculate prolongation costs, enforce cost control, and track earned value — all in one platform built to AACE standards.
Complete Cost Engineering Platform
Cost Estimation
Build detailed bottom-up estimates from first principles. Elemental, trade, and work-package breakdowns with resource-loaded rates.
Budget Control
Set approved budgets, track committed costs, and monitor forecast final cost in real time. Variance analysis at any level of the WBS.
Earned Value Management
Calculate BCWS, BCWP, ACWP, CPI, and SPI. Forecast EAC and ETC with multiple completion scenarios.
Prolongation Cost Claims
Calculate time-related prolongation costs including preliminaries, head office overheads, and finance charges. Integrates with WS ClaimPro.
Valuation & Applications
Prepare interim payment applications, valuations, and final account summaries. Formatted for contract submission.
AACE-Compliant Reporting
All cost reports built to AACE International Recommended Practices. Audit-ready outputs for dispute and contract use.
Full EVM Suite to AACE Standards
Who Uses WS CostMaster
Tender Cost Planning
Build competitive, defensible tender estimates from first principles with full resource and rate transparency.
Project Cost Control
Monitor budget vs actual vs forecast throughout construction. Identify cost overruns before they become claims.
Prolongation & Loss Claims
Quantify prolongation costs and loss and expense claims with a fully auditable, protocol-compliant cost build-up.
Final Account Settlement
Prepare and negotiate the final account with a complete, traceable record of all cost movements and variations.
See WS CostMaster in Action
Book a 30-minute demo and we'll walk through cost estimation, EVM, and prolongation cost calculation for your project type.
Book a Demo