Profit Per Panel Modeling for PBR Production

How to Calculate True Margin on Every PBR Roof Panel You Manufacture

If you manufacture PBR (Purlin Bearing Rib) panels, your real profit is not measured per ton — it’s measured per panel.

Many producers calculate profit incorrectly by:

• Estimating margin per ton only

• Ignoring scrap loss

• Ignoring downtime

• Ignoring overhead

• Ignoring coil waste at changeovers

The result?

Overestimated profits and delayed ROI.

This guide breaks down:

• How to calculate cost per panel

• How to calculate revenue per panel

• Fixed vs variable costs

• Scrap impact

• Realistic margin scenarios

• Sensitivity modeling

• How to improve profit per panel

Because in roll forming:

Small improvements in panel margin multiply across thousands of panels.

Step 1: Define Your Standard PBR Panel

Let’s model a common scenario.

Example panel:

• 36" coverage width

• 12 ft length

• 26 gauge painted steel

• 0.018” thickness approx.

First, calculate material weight per panel.

Material Weight Per Panel Calculation

Formula:

Steel weight per square foot (26 gauge approx.) ≈ 0.75–0.80 lbs per sq ft

Panel area:

36" = 3 ft coverage
3 ft × 12 ft = 36 sq ft

Weight:

36 × 0.78 lbs ≈ 28 lbs per panel
(≈ 0.014 tons per panel)

Raw Material Cost Per Panel

Assume coil cost:

$900 per ton

Material cost per panel:

0.014 tons × $900 ≈ $12.60

Material is typically 75–85% of total cost.

Add Scrap Factor

If scrap rate = 3%

Adjusted material cost:

$12.60 × 1.03 ≈ $12.98

Reducing scrap improves margin significantly.

Labor Cost Per Panel

Example:

• 3 operators
• $20/hour each
• $60/hour total labor

Production rate:

12 panels per minute
720 panels per hour

Labor cost per panel:

$60 ÷ 720 ≈ $0.08

Labor is surprisingly small per panel when volume is high.

Electricity Cost Per Panel

Assume:

• 50 kW line
• $0.15 per kWh
• $7.50 per hour

Electricity cost per panel:

$7.50 ÷ 720 ≈ $0.01

Energy is minor compared to material.

Maintenance & Wear Allocation

Assume:

• $30,000 annual maintenance
• Operating 250 days
• $120 per day

If producing 2,000 panels per day:

Maintenance cost per panel:

$120 ÷ 2,000 ≈ $0.06

Overhead Allocation

Rent, admin, insurance, etc.

Assume:

$20,000 per month overhead

If producing 40,000 panels per month:

Overhead per panel:

$20,000 ÷ 40,000 = $0.50

Overhead heavily volume-dependent.

Total Cost Per Panel Example

Cost Category	Cost Per Panel
Material	$12.98
Labor	$0.08
Electricity	$0.01
Maintenance	$0.06
Overhead	$0.50
Total Cost	$13.63

Selling Price Per Panel

Assume selling price:

$18 per panel

Gross profit per panel:

$18 – $13.63 = $4.37

Monthly Profit Example

If producing 40,000 panels per month:

40,000 × $4.37 = $174,800 gross monthly profit

This assumes consistent sales and stable coil cost.

Sensitivity Modeling

Scenario A — Coil Cost Increases to $1,050/Ton

Material cost becomes:

$14.70 per panel

Total cost ≈ $15.33

Profit ≈ $2.67 per panel

Monthly profit drops dramatically.

Material price volatility is biggest risk.

Scenario B — Scrap Increases to 6%

Material cost increases slightly.

Profit per panel drops by $0.30–$0.50.

Scrap discipline matters.

Scenario C — Volume Drops 30%

Overhead per panel increases significantly.

Profit shrinks quickly.

Volume stabilizes margin.

Key Drivers of Profit Per Panel

✔ Coil Purchase Strategy

Lower $/ton directly increases margin.

✔ Scrap Reduction

Every 1% scrap reduction increases profit noticeably.

✔ Production Speed

Higher output reduces overhead per panel.

✔ Machine Uptime

Downtime reduces monthly volume.

✔ Product Mix

Longer panels increase weight & revenue per unit.

Profit Per Panel by Gauge Comparison

Thicker gauges:

• Higher material cost

• Higher selling price

• Often higher margin

Thin gauge:

• Lower cost

• Higher volume

• Lower per-unit margin

Balance market demand carefully.

Automation Impact on Profit

Automated stacker:

• Higher upfront cost

• Lower labor cost

• Higher production rate

• Lower damage

• Better consistency

Improves profit at scale.

Common Modeling Mistakes

• ❌ Ignoring scrap
• ❌ Ignoring coil lead time
• ❌ Ignoring downtime
• ❌ Ignoring overhead
• ❌ Overestimating selling price
• ❌ Assuming 100% capacity usage

Realistic modeling prevents financial shock.

Break-Even Volume Calculation

Break-even panels per month:

Total fixed costs ÷ profit per panel

If fixed costs = $30,000 per month
Profit per panel = $4

Break-even ≈ 7,500 panels per month.

Above that = profit zone.

Frequently Asked Questions

What is average profit per PBR panel?

Typically $2–$6 depending on market and coil cost.

What affects profit the most?

Material cost and sales price.

Is labor a major cost?

Not at high production volumes.

Does scrap significantly impact profit?

Yes — small scrap increases reduce margin quickly.

Should I model profit per ton or per panel?

Per panel provides better operational clarity.

Final Conclusion

Profit per panel modeling is essential for:

• Accurate ROI forecasting.
• Stable pricing strategy.
• Coil purchasing decisions.
• Production planning.
• Business expansion.

In PBR manufacturing:

• Material cost drives margin.
• Volume drives stability.
• Efficiency drives profitability.

When properly modeled, even small improvements:

$0.25 per panel × 40,000 panels = $10,000 per month difference.

In roll forming, profit is engineered — panel by panel.