Cost of Goods Sold (COGS) Calculator
Calculate COGS using beginning inventory, purchases, and ending inventory. Compare FIFO, LIFO, and weighted-average methods with gross profit analysis.
Labor Variance Calculator
Calculate labor rate variance (LRV) and labor efficiency variance (LEV). Analyze direct labor cost differences between standard and actual hours and rates.
$/hr
hrs
$/hr
hrs
hrs
%
Labor Rate Variance⧉
$2,100.00
Unfavorable
Labor Efficiency Variance⧉
$2,000.00
Unfavorable
Total Labor Variance⧉
$4,100.00
Over budget by 10.3%
Productivity⧉
0.48 units/hr
Std: 0.50 (95% efficient)
Three-Column Variance Decomposition
AH × AR
2,100.00 × $21.00
$44,100.00
AH × SR
2,100.00 × $20.00
$42,000.00
SHA × SR
2,000.00 × $20.00
$40,000.00
Rate Variance: $2,100.00 Unfavorable
Efficiency Variance: $2,000.00 Unfavorable
Overtime Impact Analysis
OT Hours
100.00 (4.8% of total)
OT Premium Cost
$1,000.00
Rate Impact
+$0.48/hr avg
Variance Magnitude
Rate Variance
$2,100.00 U
Efficiency Variance
$2,000.00 U
Total Variance
$4,100.00 U
Hours Sensitivity (Rate Held Constant)
| Hours Change | Total Hours | Units/Hr | LEV | Total Variance |
|---|---|---|---|---|
| -10% vs std | 1,800.00 | 0.56 | $4,000.00 F | $1,900.00 F |
| -5% vs std | 1,900.00 | 0.53 | $2,000.00 F | $100.00 U |
| -2% vs std | 1,960.00 | 0.51 | $800.00 F | $1,300.00 U |
| +0% vs std | 2,000.00 | 0.50 | $0.00 F | $2,100.00 U |
| +2% vs std | 2,040.00 | 0.49 | $800.00 U | $2,900.00 U |
| +5% vs std ← | 2,100.00 | 0.48 | $2,000.00 U | $4,100.00 U |
| +10% vs std | 2,200.00 | 0.45 | $4,000.00 U | $6,100.00 U |
| +15% vs std | 2,300.00 | 0.43 | $6,000.00 U | $8,100.00 U |
Planning notes, formulas, and examples
About the Labor Variance Calculator
Labor variance analysis decomposes the total direct labor cost variance into two components: the Labor Rate Variance (LRV) and the Labor Efficiency Variance (LEV). The rate variance captures the impact of paying workers more or less than the standard wage rate. The efficiency variance captures the impact of using more or fewer hours than standard to produce the actual output.
The LRV is typically influenced by HR decisions: hiring mix, overtime authorization, and wage negotiations. The LEV reflects production management: worker skill, training effectiveness, equipment condition, production scheduling, and process design. Together, these variances provide actionable insight into labor cost control.
This calculator computes both variances, provides three-column analysis, tracks productivity metrics, and includes overtime and shift-mix modeling.
Use the result to compare scenarios, test assumptions, and revisit the model when pricing, volume, or financing inputs change.
When This Page Helps
Labor costs can represent 20-40% of manufacturing cost. Understanding whether labor overruns come from rate (paying too much per hour) or efficiency (using too many hours) directs corrective action to the right department. Rate variances drive HR decisions; efficiency variances drive production improvements. Instant recalculation lets you test different assumptions side by side, giving you the confidence to act on data rather than gut instinct.
How to Use the Inputs
- Enter the standard labor rate per hour and standard hours allowed per unit.
- Enter the number of finished units actually produced.
- Enter actual average labor rate paid and actual total hours worked.
- Review the labor rate and labor efficiency variances.
- Compare actual productivity (units per hour) to standard.
- Use the overtime analysis to understand rate premium impacts.
Formula used
Labor Rate Variance = (Actual Rate − Standard Rate) × Actual Hours
Labor Efficiency Variance = (Actual Hours − Standard Hours Allowed) × Standard Rate
Standard Hours Allowed = Standard Hrs/Unit × Actual Units Produced
Labor Productivity = Units Produced ÷ Actual HoursExample Calculation
Result: $2,100 rate U + $2,000 efficiency U = $4,100 total unfavorable
Standard hours allowed: 2 × 1,000 = 2,000 hrs. Standard cost: $20 × 2,000 = $40,000. Actual: $21 × 2,100 = $44,100. LRV = ($21 − $20) × 2,100 = $2,100 U. LEV = (2,100 − 2,000) × $20 = $2,000 U. Workers were paid $1/hr more and used 100 extra hours.
Tips & Best Practices
- Track overtime hours separately — overtime premium is a major driver of rate variance.
- Favorable rate variance from using less-skilled workers may cause unfavorable efficiency.
- Measure efficiency in units per labor hour for an intuitive productivity metric.
- Learning curve effects should be built into standards for new products or processes.
- Cross-train workers to reduce the impact of absenteeism on efficiency.
- Investigate idle time separately from productive inefficiency for better root-cause analysis.
The Rate-Efficiency Tradeoff
Using more experienced (higher-paid) workers may reduce hours needed to complete a job. The rate variance is unfavorable but the efficiency variance is favorable. Managers should evaluate the net effect: if saving 50 hours at $20/hr ($1,000) costs only $2/hr premium on 150 hours ($300), the net benefit is $700.
Idle Time and Downtime
Idle time (workers paid but not producing) inflates both the rate and efficiency variances. Separating idle time into its own variance provides clearer analysis. Causes of idle time include machine breakdowns, material shortages, scheduling gaps, power outages, and quality holds — each requiring different corrective action.
Productivity Measurement
Units per labor hour is the simplest productivity metric. Track it daily or weekly for each work center. Benchmark against industry standards when available. A declining trend signals efficiency problems; an improving trend may indicate standards need updating to maintain relevance for cost control.
Sources & Methodology
Last updated:
Frequently Asked Questions
Common causes include overtime premiums, using higher-skilled (higher-paid) workers than planned, wage increases not reflected in standards, shift differentials, temporary labor agency premiums, and new-hire onboarding inefficiency. The root cause determines whether it's controllable or reflects market conditions.
Excess hours result from machine breakdowns, material quality problems, worker inexperience, poor production scheduling, excessive setup times, rework requirements, inadequate supervision, and outdated work methods. Some of these are controllable by production managers; others (like material defects) originate elsewhere.
Overtime creates two effects. The overtime premium (typically 50% extra) causes an unfavorable rate variance. Fatigue during overtime may also reduce productivity, causing unfavorable efficiency variance. However, if overtime avoids the cost of hiring additional workers, it may be the most economic choice overall.
Best practice is to report idle time (downtime, waiting) as a separate variance rather than burying it in efficiency. This distinguishes between productive inefficiency (workers are slow) and idle time (workers are waiting for materials, machines, or work). Each has different causes and corrective actions.
When workers repeat operations, they get faster following a predictable learning curve (typically 80-90%). New products should have higher standard hours initially, reduced as workers gain experience. Failure to adjust standards for the learning curve creates misleading unfavorable efficiency variances early in a product's life.
If overhead is applied based on direct labor hours, labor efficiency variance directly affects overhead application. Excess labor hours cause over-applied variable overhead (if actual OH is proportional) and affect the overhead efficiency variance. The interconnection means labor efficiency improvements benefit both labor and overhead costs.
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