NetSuite Assembly Item Standard Cost Rollup Calculator
Standard cost for an assembly is the sum of material, labor and overhead per unit at a defined lot size. This calculator shows the rollup logic behind the cost you load into NetSuite, and how the lot size you assume changes the setup burden per unit.
Your numbers
Your results
Simplified single-operation rollup. Real routings have several operations, work centers and machine rates; sum them the same way.
Standard cost per unit vs lot size
Sweeps Standard lot size from 10 to 500, holding your other inputs fixed.
Standard cost drift review
Optional: we can outline a read-only comparison of standard cost against actual work order cost in NetSuite.
Optional. The tool and every export work without this. No spam.
How to use it
Enter the BOM material cost per unit, the setup time per lot, the run time per unit, a labor rate and the overhead rate applied to labor. Set the standard lot size. The result splits cost into material, setup, run and overhead. Drag the lot size slider to see the setup effect: small lots carry a heavy per-unit setup cost, and the curve flattens as lots grow. Use the number as a cross-check against what your costing run produces.
The method
Setup cost per unit is setup hours times the labor rate divided by lot size. Run labor per unit is run minutes divided by 60 times the rate. Overhead is applied as a percentage of labor here, but your organization may absorb it on machine hours or per unit instead; the structure of the rollup is the same. Standard cost is material plus labor plus overhead. For multi-level assemblies, roll up lowest-level items first so each parent picks up the correct child cost.
- Cost lowest-level subassemblies first
- Keep lot size consistent between costing and planning
- Review overhead basis with finance before changing it
Reading it and common mistakes
Material share tells you where cost reduction effort belongs; above 70 percent, labor tweaks hardly matter. A frequent mistake is costing at a lot size that never occurs, so actual setup absorption differs from standard and generates unfavorable variances every month. Another is leaving stale labor rates in place after a wage change. Compare the output to your actual average work order lot size and update the standard when the gap becomes persistent.
Frequently Asked Questions
Does this replace the NetSuite cost rollup?
No. It is a transparent cross-check of the arithmetic. NetSuite performs the actual rollup from your BOM, routing and cost settings, and results depend on your costing method and configuration.
How should overhead be applied?
Common bases are direct labor hours, machine hours or a percentage of labor cost. Use the base that best correlates with how overhead is consumed. Your cost accountant should own the choice.
What lot size should I use for standard cost?
Use a representative lot size from recent history, often a median of completed work orders. A lot that is rarely built produces misleading standards.
Does scrap belong in the standard?
If scrap is stable and expected, include it through yield on material and labor so the standard reflects realistic consumption. Treat abnormal scrap as a variance, not as part of the standard.
Netray can pull actual lot sizes, routing times and component costs from NetSuite to show which standards have drifted from reality.
Related Tools
NetSuite Work Order Labor Variance Calculator
Break labor variance on completed work orders into a rate variance and an efficiency variance and read labor efficiency.
NetSuiteNetSuite Work Order Yield and Scrap Start Quantity Calculator
Calculate the work order start quantity and scrap cost needed to hit a required good quantity across three process steps.
NetSuiteNetSuite Landed Cost Allocation Calculator
Spread freight, insurance and duty across a shipment by value or weight and see the landed cost per unit for one receipt line.
More NetSuite tools
See all- NetSuite Work Order Status Reference
- NetSuite Saved Search Formula Generator
- NetSuite CSV Import Template Guide
- NetSuite Assembly Build Checklist
- NetSuite Role Permission Matrix Worksheet
- NetSuite Inventory Costing Method Reference
- NetSuite Month End Close Checklist
- NetSuite License Cost Estimator
- NetSuite User Access Request Form Template
New to NetSuite? Start with the NetSuite guide and toolkit, or plan with NetSuite Cost Calculator, Training Path Builder, ERP Certification Study Planner.
Keep exploring
Free tools
- Oracle Fusion Standard Cost Rollup CalculatorEstimate a one-level standard cost with yield loss, setup spread over lot size and overhead on labor, and sweep lot size to see the effect.
- NetSuite Assembly Build ChecklistA pre-build and post-build checklist for NetSuite assembly items and work orders, covering setup, inventory and costing checks.
- NetSuite Manufacturing and Item Record Types ReferenceFind the record id for assembly items, BOMs, revisions, routings and the manufacturing transactions, with a note on what each is for.
ERP fixes and how-tos
- How to create an assembly build or work order in NetSuiteHow to build assembly items in NetSuite: when to use a simple Assembly Build versus a Work Order, BOM setup, component availability, and completion steps.
- NetSuite MRP Not Generating Planned Orders: Causes and FixesWhy NetSuite supply planning creates no planned orders: item planning fields, time fences, lead time, lot sizing, demand source, and how to firm and release.
- NetSuite Outsourced Manufacturing: Subcontract Work Order FlowSet up NetSuite outsourced manufacturing: vendor charge items, PO to work order link, sending components to the subcontractor, receipt and costing.
Runs with your ERP
- OpenBOM and Oracle NetSuite: from CAD BOM to assembly itemsHow OpenBOM for NetSuite moves SOLIDWORKS and other CAD BOMs into NetSuite assembly items and BOMs, push and pull modes, setup steps, pitfalls and AI use.
- NetSuite Manufacturing Mobile and Tablet MES for Shop Floor DataOracle's NetSuite Manufacturing Mobile gives operators a scanner and tablet interface for labor, completions, material moves and receipts. Setup and limits.
- ShipHawk and Oracle NetSuite: carrier rates, labels and trackingHow ShipHawk pulls NetSuite item fulfillments, rate-shops parcel and LTL carriers and writes tracking back, with setup steps, pitfalls and AI uses.
AI on your ERP
- AI for Cost Accounting and Variance Analysis: Explain Why Standard and Actual Cost DivergedAI that explains purchase price, usage, efficiency and rate variances from ERP cost data, flags rollup problems and drafts variance commentary. Private and on-prem.
- NetSuite Inventory and Demand Planning With AI That Checks Your Reorder LogicAI for NetSuite inventory and demand planning: review reorder points, safety stock, item demand plans and stockouts using SuiteQL on private infrastructure.
Integrations
- How to build an MCP server for Oracle NetSuiteDesign an MCP server for Oracle NetSuite: which tools to expose, SuiteQL and RESTlet backing, OAuth scoping, transports, audit, and read-only first.
- How to use ChatGPT with Oracle NetSuiteConnect ChatGPT to Oracle NetSuite: custom GPT actions, exports versus live access, enterprise data controls, and when a private model is the safer choice.