How Product Margin and Labor Margin Are Calculated
Both margins use revenue minus the relevant direct cost, divided by the corresponding revenue and multiplied by 100.
Product Margin (%) = (Product Revenue − Direct Product Costs) ÷ Product Revenue × 100
Labor Margin (%) = (Labor Revenue − Direct Labor Costs) ÷ Labor Revenue × 100
Direct product costs generally include the purchase cost of furniture and eligible costs assigned to inventory. Direct labor costs may include installer wages, payroll taxes, benefits, and other labor expenses allocated to the installation service under the company’s accounting policy. If subcontractors perform installation, their service charges may form part of the direct labor or installation cost calculation.
Dealers should keep the revenue and cost bases consistent. Product discounts belong in the calculation of net product revenue, while installation discounts should reduce labor-service revenue. Shared expenses, such as project management or vehicle costs, need a consistent allocation policy if management wants to include them in a broader contribution analysis.
Worked Example: Comparing Margins on One Project
Suppose a furniture dealer completes an office project with $80,000 in product revenue and $20,000 in installation labor revenue. The direct product cost is $52,000, while direct installation labor costs are $14,000.
Product Margin = ($80,000 − $52,000) ÷ $80,000 × 100 = 35%
Labor Margin = ($20,000 − $14,000) ÷ $20,000 × 100 = 30%
The product portion generates $28,000 in gross profit, and installation labor generates $6,000. Combined, the project earns $34,000 before other expenses included outside these direct cost categories. The product margin is 35%, compared with a 30% labor margin.
This comparison shows why total project revenue alone does not explain profitability. If installation hours increase without a corresponding change in the quoted labor price, labor margin can fall even when product margin remains steady.
What High and Low Margins Reveal
A higher product margin typically indicates that selling prices, supplier terms, product mix, and discounts are producing more gross profit per revenue dollar. A lower product margin may reflect supplier price increases, competitive discounting, freight costs, or a greater share of lower-margin products. Dealers should compare margins across similar product categories and project types rather than applying one expectation to every sale.
A higher labor margin generally means the installation price covers direct labor costs with more remaining revenue. A lower labor margin can indicate that estimated hours were below actual hours, site conditions required extra work, installer rates increased, or the contract price did not reflect the work performed. Very high labor margins should also be reviewed to confirm that all relevant hours and direct costs have been recorded.
Finance teams can compare planned labor hours with actual hours using Actual Vs Forecast Labor. For example, if a project was priced for 40 installation hours but required 52, the additional 12 hours should be investigated to understand the effect on labor cost and future estimates.
Using Margin Analysis for Pricing and Project Decisions
Separate margin reporting helps a dealer identify whether pricing changes should apply to furniture, installation, or both. The Interest Margin used in lending and financial services is a different measure; furniture dealers should use product and labor revenue and cost definitions appropriate to their operations. Similarly, a Margin Call is a financial-market requirement related to collateral, not a furniture project profitability measure.
For purchasing controls, a purchase requisition can document the need for furniture or installation materials before buying. An approved purchase order then records the authorized supplier commitment. In the sales cycle, the guide PO in Sales: Purchase Orders in the Sales Cycle Guide addresses customer purchase orders and their role in transaction processing. These records help teams connect quoted project scope, purchasing commitments, and actual delivery costs.
Supplier invoices should be captured, validated against orders and receipts, assigned the correct general ledger codes, and approved before posting. Consistent invoice processing helps finance teams assign product purchases and subcontracted services to the right cost categories, supporting reliable margin reporting.
Best Practices for Reliable Margin Reporting
Use the same margin definitions across estimates, project budgets, and final results. Establish separate product and labor revenue codes, document which direct costs belong in each category, and review completed projects for differences between estimated and actual costs. Avoid counting the same expense in both product and labor costs.
- Track product revenue, purchase costs, supplier rebates, and eligible freight by project.
- Record installation hours, labor rates, subcontractor charges, and approved change orders.
- Compare estimated and actual margins by product category, project type, and installation team.
- Review discounting and scope changes before approving revised customer pricing.
These practices help managers set realistic margin targets, improve future estimates, and understand which combination of products and services contributes most to business performance.
Summary
Furniture Product Margin vs Labor Margin separates the profitability of furniture sales from the profitability of installation and other labor services. Product margin focuses on product revenue and direct product costs, while labor margin compares labor-service revenue with the direct cost of delivering that work. Calculating both consistently gives furniture dealers clearer insight into project profitability, pricing decisions, labor utilization, and financial performance.