{
  "slug": "bar-inventory-variance",
  "title": "Bar Inventory Variance Calculator",
  "heading": "Bar Inventory Variance Calculator",
  "category": "financial",
  "url": "https://www.revenuelab.fyi/toolbox/bar-inventory-variance",
  "summary": "Compare theoretical vs. actual liquor usage to catch over-pouring or theft.",
  "description": "Inventory variance compares what your POS says you should have used against what physically left the storeroom. Theoretical usage comes from sales data multiplied by the recipe pour size for each drink sold; actual usage comes from beginning inventory plus purchases minus ending inventory, counted physically. The gap between the two, expressed as a percentage of theoretical cost, is your variance. A healthy bar runs under 5% variance; 5-10% suggests inconsistent pouring or recipe drift; above 10% often means theft, comped drinks not being rung in, or breakage not being logged. This calculator takes beginning inventory value, purchases, ending inventory, and POS-calculated theoretical usage to surface both the dollar and percentage gap, which is the number that should trigger a deeper spot-check of pour discipline, comp logging, and receiving procedures.",
  "formula": "Actual usage = beginning inventory + purchases − ending inventory. Variance % = (actual − theoretical) ÷ theoretical × 100.",
  "dateModified": "2026-09-30",
  "run_url": "https://www.revenuelab.fyi/api/public/calc?tool=bar-inventory-variance",
  "inputs": [
    {
      "id": "beginInv",
      "label": "Beginning inventory value",
      "kind": "number",
      "hint": null,
      "default": 8200,
      "unit": "$",
      "min": 0,
      "max": null
    },
    {
      "id": "purchases",
      "label": "Purchases (period)",
      "kind": "number",
      "hint": null,
      "default": 4600,
      "unit": "$",
      "min": 0,
      "max": null
    },
    {
      "id": "endInv",
      "label": "Ending inventory value",
      "kind": "number",
      "hint": null,
      "default": 7100,
      "unit": "$",
      "min": 0,
      "max": null
    },
    {
      "id": "theoreticalUsage",
      "label": "POS theoretical usage cost",
      "kind": "number",
      "hint": null,
      "default": 5100,
      "unit": "$",
      "min": 0,
      "max": null
    }
  ],
  "outputs": [
    {
      "id": "variancePct",
      "label": "Variance %",
      "format": "percent",
      "hint": null,
      "primary": true
    },
    {
      "id": "varianceDollar",
      "label": "Variance in dollars",
      "format": "currency",
      "hint": null,
      "primary": false
    },
    {
      "id": "actualUsage",
      "label": "Actual usage (calculated)",
      "format": "currency",
      "hint": null,
      "primary": false
    },
    {
      "id": "flag",
      "label": "Status",
      "format": "raw",
      "hint": null,
      "primary": false
    }
  ],
  "worked_example": {
    "inputs": [
      "Beginning inventory value: 8200 $",
      "Purchases (period): 4600 $",
      "Ending inventory value: 7100 $",
      "POS theoretical usage cost: 5100 $"
    ],
    "outputs": [
      "Variance %: 11.8%",
      "Variance in dollars: $600",
      "Actual usage (calculated): $5,700",
      "Status: Investigate"
    ]
  },
  "how_to": {
    "title": "How to use this",
    "steps": [
      "Enter beginning inventory value ($).",
      "Enter purchases (period) ($).",
      "Enter ending inventory value ($).",
      "Enter pos theoretical usage cost ($).",
      "Read your variance % on the right — it updates as you type.",
      "Hit Share to keep the scenario or send it to someone."
    ]
  },
  "scenarios": [
    {
      "name": "Conservative",
      "description": "Lower-end numbers — what if things land soft?",
      "values": {
        "beginInv": 4900,
        "purchases": 2800,
        "endInv": 4300,
        "theoreticalUsage": 3100
      }
    },
    {
      "name": "Typical",
      "description": "Defaults — the most common real-world setup.",
      "values": {
        "beginInv": 8200,
        "purchases": 4600,
        "endInv": 7100,
        "theoreticalUsage": 5100
      }
    },
    {
      "name": "Ambitious",
      "description": "Higher-end numbers — what if things really pop?",
      "values": {
        "beginInv": 13100,
        "purchases": 7400,
        "endInv": 11400,
        "theoreticalUsage": 8200
      }
    }
  ],
  "limitations": [
    "Results are estimates before tax, fees, and inflation unless an input explicitly covers them.",
    "Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.",
    "This is educational maths, not financial advice. Check anything contractual with the lender or your accountant."
  ],
  "faq": [
    {
      "q": "What's a normal variance percentage?",
      "a": "Under 5% is considered healthy and reflects normal breakage, comp drinks, and pour inconsistency. Between 5-10% warrants closer monitoring of pour discipline. Above 10% consistently points to a systemic problem — theft, unrung comps, or a bad theoretical usage baseline."
    },
    {
      "q": "What causes negative variance (using less than theoretical)?",
      "a": "Under-pouring, watered-down well liquor, or a recipe database that overstates pour sizes relative to what bartenders actually pour. It's less common than positive variance but still a quality and consistency problem worth fixing."
    },
    {
      "q": "How often should bars do a full inventory count?",
      "a": "Weekly for high-volume bars, at minimum monthly for lower-volume operations. Weekly counts catch problems while the shift schedule that caused them is still fresh enough to investigate specific bartenders or shifts."
    },
    {
      "q": "Can POS theoretical usage be wrong?",
      "a": "Yes — if recipes in the POS don't match what's actually poured (wrong pour size entered, recipe changed but POS not updated), theoretical usage will be systematically off and create false variance. Audit recipe data in the POS before assuming staff behavior is the problem."
    }
  ],
  "related": [
    "https://www.revenuelab.fyi/toolbox/pour-cost-calculator",
    "https://www.revenuelab.fyi/toolbox/keg-yield-calculator",
    "https://www.revenuelab.fyi/toolbox/waste-percentage-calculator"
  ],
  "license": "CC-BY-4.0",
  "citation": "RevenueLab — Bar Inventory Variance Calculator (https://www.revenuelab.fyi/toolbox/bar-inventory-variance)"
}