Prism Construction Intelligence
prism-intel.com

Margin Leakage Calculator

Most construction businesses are losing margin through their procurement without knowing how much or where it is coming from. Seven inputs produces a credible estimate specific to your business.

01 / 07Numeric
What is your approximate annual in-house spend on materials and plant?
Include only what your business purchases directly. Exclude supply-and-fit packages where the subcontractor buys the materials.
£
An estimate is sufficient — this is the base figure your result is built from
02 / 07Select and allocate
What types of projects does your business work on?
Select all that apply, then use the sliders to show what proportion each represents. Total must reach 100%.
✓
Residential New Build
0%
✓
Residential Redevelopment
0%
✓
Commercial New Build
0%
✓
Commercial Fit-Out / Interiors
0%
✓
Commercial Conversion
0%
✓
Social Housing & Affordable
0%
✓
Civil Engineering & Infrastructure
0%
Total allocated 0%
03 / 07Select all that apply
Which of the following does your business directly purchase?
Select every category where your business buys the materials directly — not where a subcontractor supplies and fits.
✓
Groundworks & Civils
✓
Drainage
✓
Structural Materials
✓
External Walls & Insulation
✓
Roofing
✓
Windows & Doors
✓
Plumbing, Heating & Mechanical
✓
Electrical & Renewables
✓
Bathroom & Sanitaryware
✓
Kitchen
✓
Plastering & Drylining
✓
Internal Joinery
✓
Flooring & Internal Finishes
✓
Commercial Fit-Out
✓
Landscaping & External Works
✓
Plant & Equipment Hire
Select at least one category to continue
04 / 07Numeric
How many suppliers are you actively purchasing from?
All suppliers across all projects — merchants, manufacturers, plant hire, specialists. Include anyone you have placed an order with in the last 12 months.
05 / 07Numeric
How many projects are you typically running at the same time?
Active sites where materials and plant are being ordered. Use your busiest typical period as the reference point.
06 / 07Select one
When you price a new project, how do you arrive at your material costs?
Select the option that most accurately reflects current practice — not how it is intended to work.
Experience and knowledge of previous jobs
Gut feel — no structured data reference
Fresh supplier quotes obtained per project
Job-by-job pricing — no carry-over rates or frameworks
Agreed rates applied at tender stage
Some framework pricing exists and is referenced
Structured data and historical spend analysis
Estimating built from actual procurement records
07 / 07Select one
How clearly can you see what you are spending, and with who, across your business right now?
Visibility determines whether leakage compounds unnoticed or gets identified and addressed.
No consolidated view — project by project at best
No central picture of spend across the business
Rough picture but nothing consolidated
Partial visibility, manually assembled when needed
Tracked manually but requires significant effort
Spreadsheets or manual reconciliation in use
Clear, near real-time visibility across the business
Spend data is accessible, current and actionable
Almost there — your results are ready
Enter your details to see your results immediately. We will also send you a full breakdown to keep. No commitment required.
Your details are used only to deliver your results. Not shared with third parties.
Margin Leakage Calculator — Output
Based on your inputs, here is what the PCI data model indicates for a business of your profile.
Estimated Annual Margin Leakage
Conservative estimate · recoverable margin only
—–—
per year
Per week
—
This range is derived from your inputs applied against the PCI data model. It is an informed estimate, not a measured figure. Establishing the actual position requires a direct examination of your spend data.
Calculation Inputs
Annual in-house spend declared—
Active suppliers—
Concurrent projects—
Categories in scope
Estimated leakage range—
This range reflects category-specific leakage rates weighted to your input profile. It represents the estimated proportion of your in-house spend that is recoverable through structured procurement — before any behavioural or structural factors are applied.
Known Leakage Areas in Construction Procurement
The following are established leakage areas across construction procurement. Each is present to varying degrees across the sector. The extent to which each applies to your business specifically cannot be determined without examining your spend data directly.
1
Explore
›
2
Diagnose
›
3
Control
Next Step
Free Procurement Review

We will review your results and be in touch directly — usually within one business day — if your profile suggests a meaningful opportunity worth exploring together.

No cost. No obligation. PCI only proceeds where there is an evidenced commercial case to do so.

Learn more about the PCI Engagement Journey →
© Prism Construction Intelligence prism-intel.com