GMROI Calculator

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Finance

Calculate Gross Margin Return on Investment (GMROI), a key retail metric that measures how efficiently inventory generates profit. GMROI shows the gross margin dollars returned per dollar of inventory invested, helping retailers assess inventory efficiency and profitability.

Formula

GMROI = Gross Margin ($) / Average Inventory ($), where Gross Margin = Sales - COGS
  • Expresses return as a ratio: higher ratios indicate better inventory efficiency
  • Average inventory = (Beginning + Ending inventory) / 2
  • Retail benchmarks: fashion 1.5-3.0, grocery 0.3-0.8
  • Use to compare product categories or store performance

Retail Store Inventory Analysis

Inputs
  • Annual Sales Revenue ($): 150000 $
  • Cost of Goods Sold ($): 90000 $
  • Beginning Inventory Value ($): 20000 $
  • Ending Inventory Value ($): 22000 $

A retail store with $150k sales, $90k COGS, averaging $21k inventory generates $60k gross margin on $21k investment = 2.86:1 GMROI, indicating strong inventory productivity.

Frequently asked questions

What is a good GMROI?
GMROI varies by industry: 2.0+ is excellent for most retail, 1.5-2.0 is good, <1.0 suggests inventory management issues.
How often should I calculate GMROI?
Monthly or quarterly to track trends and identify slow-moving inventory categories that underperform.
Can GMROI be improved?
Yes, by increasing sales (same inventory), reducing COGS (better sourcing), or reducing inventory levels (better demand forecasting).