Standard Valuation Rate (Standard Costing)
The Standard Valuation Rate feature lets you value an item’s inventory at a single, pre-defined “standard” cost instead of a continuously changing FIFO or Moving Average rate.
With FIFO or Moving Average, inventory value changes every time a transaction occurs. With Standard Cost, the rate is fixed and only changes when you intentionally publish a new standard rate. The difference between actual purchase price and standard cost is recorded in a dedicated Purchase Price Variance account.
This guide explains setup, behavior, accounting impact, and the rules that ensure consistency in a standard-cost system.
1. Why choose Standard Cost over FIFO / Moving Average?
| Concern | FIFO / Moving Average | Standard Cost |
|---|---|---|
| Inventory value stability | Changes with every transaction | Fixed until updated |
| Backdated transactions | Trigger full reposting | No reposting required |
| Reposting performance | Slow for large ledgers | Fast and stable |
| Cost predictability | Variable | Fixed standard rate |
| Variance visibility | Hidden in stock value | Shown in variance accounts |
| Best suited for | Trading / lot costing | Manufacturing / high-volume operations |
Key Benefit
Backdated entries do not trigger revaluation. The system only adjusts quantities and applies already-defined standard rates, avoiding expensive recalculation.
2. Key Concept: Item Standard Cost
Standard rates are defined using the Item Standard Cost document. Each record contains:
- Item — the product being valued
- Company — company-specific rate
- Standard Rate — fixed valuation rate
- Effective Date — from when the rate applies
Rates form a timeline. The latest effective record determines the valuation rate.
Item A ├─ ISC-001 Effective: 01-Jan-2025 Rate: 100 └─ ISC-002 Effective: 01-Jan-2026 Rate: 130
3. Setting up Standard Cost
Step 1 — Enable Standard Cost
- Set valuation method at Item level OR Company OR Stock Settings
- Item-level setting takes highest priority
- Must be set before stock transactions begin
Step 2 — Create Item Standard Cost
- Create new Item Standard Cost
- Set Item and Company
- Enter Standard Rate (> 0)
- Set Effective Date (not future)
- Submit record
Important Rule
The first standard cost must be defined before any stock transaction exists for the item.
Step 3 — Transactions
All stock entries are valued using the active standard rate at the transaction date.
Step 4 — Updating Rate
- Create a new Item Standard Cost record
- Set later Effective Date
- System auto-creates revaluation entry
- Stock is revalued across warehouses
4. Accounting Behavior
4.1 Stock Valuation
Stock is always valued at standard rate, not purchase rate.
Example
- Standard rate = 100
- Purchase rate = 150
- Stock value recorded = 100 × quantity
4.2 Purchase Price Variance
| Account | Debit | Credit |
|---|---|---|
| Stock Asset | 130 | |
| Purchase Price Variance | 70 | |
| Stock Received But Not Billed | 200 |
The difference between purchase price and standard rate is posted to Purchase Price Variance.
4.3 Manufacturing Variance
Finished goods are valued at standard rate regardless of input cost. Differences go to Stock Adjustment.
Example
Consume RM worth 250 → produce FG worth 200 → difference 50 goes to Stock Adjustment.
5. System Rules
5.1 Backdated Restriction
- No transaction before latest effective rate date
- Prevents revaluation inconsistency
Rule
You cannot post transactions before the latest Item Standard Cost effective date.
5.2 No Historical Cancellation
- Do not cancel past stock entries
- Use forward adjustments instead
- Maintain ledger integrity
6. Example Scenarios
Scenario A — Purchase Variance
- Standard = 100
- Purchase = 120
- Variance = 20 → booked separately
Scenario B — Rate Update
- Old rate: 100
- New rate: 130
- System revalues all stock automatically
Scenario C — Backdated Entry
- Allowed only within current rate period
- No reposting required
7. Best Practices
- Define standard cost before transactions begin
- Configure variance accounts early
- Review variances periodically
- Use clean cut-off dates for rate changes
- Never modify historical stock entries
Summary
Standard Costing values inventory at a fixed rate, ensuring stability, predictable costing, and faster performance compared to FIFO and Moving Average. Variances are tracked separately, and rate changes are handled through controlled revaluation entries without historical reposting.
