8 great benefits of using a purchase order system

In project-based industries, margins are tight and costs are often committed long before invoices reach finance. A purchase order (PO) system doesn’t just manage paperwork — it transforms how organizations control spend, save time, and protect project profitability. Research referenced by Boston Consulting Group (BCG) shows that companies can reduce purchasing costs by up to 10% and cut time spent on procurement activities by as much as 30% by implementing structured purchasing and approval processes.

1 - Significant Reduction in Time Spent on Procurement

A digital PO system eliminates many of the manual tasks that slow down purchasing in project environments:

• Reduced manual data entry and re-keying
• Faster digital approvals
• A single source of truth for orders and documentation
• Less time spent reconciling invoices and chasing information

This frees up project teams, procurement, and finance to focus on delivering projects, not administrative work.  

2 - Stronger Cost Reduction and Budget Discipline

Purchase orders ensure spending is approved before commitment, not after the invoice arrives. This gives finance managers early visibility into cost exposure and supports proactive budget control. BCG analysis highlights that organizations using structured procurement and PO controls can achieve up to 10% cost savings by reducing overspend, leakage, and inefficiencies.  

3 - Elimination of Maverick Spending

Maverick spending — purchases made outside approved suppliers, contracts, or budgets — is common in fast-moving project environments. A PO system enforces approval workflows and preferred suppliers, helping eliminate unauthorized spend that quietly erodes margins.  

4 - Real-Time Visibility of Committed Costs

Unlike invoices, purchase orders show future financial commitments. This allows finance and project controllers to:

• Track committed vs. budgeted costs
• Improve cost-to-complete forecasting
• Identify potential overruns earlier

Early visibility is critical in project-based organizations where commitments often represent the majority of total cost.  

5 - Clear Audit Trails and Stronger Governance

Every purchase order creates a documented, time-stamped approval trail. This supports internal controls, simplifies audits, and provides evidence when managing changes, claims, or disputes — all common in project-driven businesses.  

6 - Improved Supplier and Vendor Management

With structured PO data, organizations gain insight into supplier usage, pricing trends, and delivery performance. This enables:

• Better supplier selection
• Consolidation of spend
• Stronger negotiation positions

Over time, this leads to more reliable supply chains and lower total project costs.

7 - Better Alignment Between Projects, Procurement, and Finance

A shared PO system creates a single source of truth. Project teams know what is approved, procurement can manage supplier relationships effectively, and finance gains real-time visibility into commitments — reducing friction, misunderstandings, and last-minute surprises.  

8 - More Accurate Forecasting and Margin Protection

By linking purchase orders to budgets and actual costs, finance teams can produce more reliable forecasts and identify risks earlier. This enables faster corrective action and helps protect margins across multiple projects.  

Final Takeaway

In project-based industries, profitability is often lost through late visibility, manual processes, and uncontrolled spending. A purchase order system addresses these challenges by reducing time spent on procurement by up to 30%, improving cost control, and strengthening forecasting accuracy. A structured PO process turns purchasing from a reactive function into a strategic control mechanism — supporting better project outcomes and stronger financial performance. CostTracker is a cloud-based purchase order system designed to make cost control easy. The system includes unique features for cost control. CostTracker is designed to be easy to use and getting started with. CostTracker can be used a stand-alone or integrated with your accounting software. CostTracker provides cost control for hundreds of companies worldwide.   To learn more about purchase orders, and reasons to use it, click here You can also find more information about tracking cost commitments here

If you want to read the full report from BCG you can find it here: https://www.bcg.com/capabilities/procurement/digital.aspx