Understated Cost of Goods Sold

Posted on by Jennifer Brazer
Cost Of Goods Sold - Complete Controller

Understate Cost of Goods Sold:
Cut Hidden Costs

Understated cost of goods sold happens when you miss or misclassify real production and fulfillment costs—making your COGS look artificially low, your gross margin look better than reality, and your operational waste harder to see and eliminate. To fix it, you need to reclassify hidden costs (like freight-in, scrap, rework, and 3PL fees) into COGS, correct any inventory misstatements, and rebuild your COGS calculation using GAAP-compliant categories for direct materials, direct labor, and manufacturing overhead.

Here’s what surprises most founders I work with: overstating ending inventory by just 5% can inflate reported net income by double digits, quietly distorting every pricing, hiring, and marketing decision you make. Over my 20+ years leading Complete Controller, I’ve reviewed thousands of income statements across ecommerce, manufacturing, CPG, and services—and I can tell you that “beautiful” margins are often the loudest warning sign in the room. In this article, I’ll walk you through how to spot buried costs, correct your cost of goods sold statement, and build an operational rhythm that turns honest numbers into real profit. You’ll leave with a founder’s playbook, a 90-day plan, and the confidence to face your COGS head-on.

What is understated cost of goods sold and how do you fix it?

  • The short answer: Understated COGS means missing direct materials, direct labor, or manufacturing overhead in your calculation—fixed by reclassifying costs, correcting inventory values, and applying GAAP COGS compliance.
  • Understated COGS inflates gross margin, making unhealthy SKUs look profitable and distorting pricing decisions.
  • Inventory misstatement is the #1 driver—overstated ending inventory automatically creates under-stated COGS and overstated profit.
  • Hidden costs live in SG&A when they belong in COGS: freight-in, 3PL pick/pack fees, scrap, rework, and obsolete stock.
  • The fix is both accounting and operational—clean up your chart of accounts, then use accurate data to cut true waste. Cubicle to Cloud virtual business

What Does “Understated Cost of Goods Sold” Really Mean for Your Business?

Cost of goods sold is the total of all direct costs tied to producing or acquiring the goods you sold in a period—materials, production labor, and manufacturing overhead. When any of those buckets leaks out of COGS and lands in SG&A or operating expenses, your COGS is understated and your gross margin looks better than the truth.

The problem isn’t just cosmetic. Understated COGS overstates net income, overstates inventory assets on your balance sheet, and creates real financial reporting risk under GAAP. When banks, investors, or a future acquirer dig in, restatements get ugly fast.

Cost of goods sold analysis: Seeing beyond the income statement

A basic cost of goods sold analysis (Beginning Inventory + Purchases – Ending Inventory) tells you almost nothing about why your margins move. Operators need COGS broken down by SKU, channel, location, and time period so anomalies pop out.

  • Track COGS as a percentage of revenue monthly, not just quarterly
  • Compare unit costs across suppliers, batches, and fulfillment channels
  • Flag any SKU where gross margin swings more than 3 points without a price change

COGS calculation basics every founder must understand

Retailers use: COGS = Beginning Inventory + Purchases – Ending Inventory. Manufacturers use: COGS = Direct Materials + Direct Labor + Manufacturing Overhead. Simple formulas—messy execution.

Under U.S. GAAP, “freight-in” (inbound shipping on inventory) is part of inventory cost, not a period expense (Kieso, Weygandt, and Warfield, Intermediate Accounting, 2019). When companies book freight-in to SG&A instead, they understate COGS and overstate gross margin—one of the most common mistakes I see in growing product businesses.

Hidden costs shouldn’t hide your profits. See how Complete Controller helps businesses uncover the numbers that matter.

How Understated Cost of Goods Sold Distorts Gross Margin and Decisions

When your gross margin is inflated, everything downstream breaks quietly. You over-fund marketing on losing SKUs, underprice products, hire too aggressively, and misread which channels are actually profitable.

The scariest part? These decisions compound. By the time cash flow signals something is wrong, you’ve spent months (or years) scaling the wrong things.

The impact of inaccurate inventory valuation on COGS and profit

Here’s the classic red flag: if ending inventory is overstated, COGS is understated and income is overstated. The reverse is also true—understated ending inventory overstates COGS and understates income (Stice, Stice, and Skousen, Financial Accounting, SPSCC Open Text). This inverse relationship is the single most important concept in inventory accounting.

GAAP COGS compliance and financial reporting risk

GAAP requires that all costs necessary to bring inventory to a saleable condition sit in COGS—not in operating expenses. Get this wrong at scale, and you face bank covenant issues, investor mistrust, and possible restatements.

In 2019, Under Armour disclosed material misstatements tied to how it accounted for certain costs and reserves, and restated prior financial statements (Sebastian, The Wall Street Journal, Aug. 12, 2019). The lesson: when margins look “too good,” auditors, activist investors, and regulators start asking hard questions.

Where Hidden Costs Hide: The “COGS Iceberg” in Your GL

Above the waterline: raw materials and direct wages. Below the waterline: freight variance, scrap, shrink, rework, obsolescence, and those mysterious “other charges” from your 3PL provider. Most founders only see the top of the iceberg.

Direct materials, direct labor, and manufacturing overhead leaks

  • Direct materials cost leaks: purchase price variances, unrecorded shrink, unbilled supplier surcharges, and BOM vs. actual usage gaps
  • Direct labor cost leaks: production staff misclassified as “admin,” rework hours buried in operations, idle time unassigned
  • Manufacturing overhead misses: factory rent, utilities, depreciation, QC, and maintenance treated as period expenses instead of absorbed into unit cost

Inventory Accounting Errors: The Silent Driver of Under-Stated COGS

Inventory is the control center for COGS. Every miscount, missed write-down, or data entry error flows directly into your cost of goods sold statement and distorts your bottom line.

Inventory accounting methods and their effect on COGS

FIFO, LIFO, and weighted average each produce different COGS results under changing prices. Method choice matters, but consistent application matters more. Method changes mid-year (without proper disclosure) create margin swings that look like performance shifts but are pure accounting noise.

Practical controls to prevent inventory-driven COGS errors

  1. Cycle count critical SKUs weekly or bi-weekly
  2. Reconcile physical counts to your cost of goods sold statement monthly, not annually
  3. Write down obsolete stock as soon as it’s identified—don’t wait for year-end
  4. Investigate variances over a defined threshold within 48 hours
  5. Tie BOM to actual usage and flag deviations by product line

A Founder’s Playbook to Correct Understated COGS and Cut Hidden Waste

This is the sequence I walk clients through when we find under-stated COGS. It works whether you’re a $2M ecommerce brand or a $50M manufacturer.

Clean up your COGS calculation and chart of accounts

Map every cost from the supplier’s door to the customer’s hand. Apply the GAAP test: “Would this cost exist if we didn’t produce or acquire this product?” If yes, it belongs in COGS. Build granular GL accounts for materials, freight-in, production labor, overhead, scrap, and inventory adjustments—so COGS isn’t one giant mystery bucket.

Build a monitoring rhythm

Run monthly cost of goods sold analysis by product, channel, and location with variance tracking. Pair it with weekly cycle counts on your top 20% of SKUs by revenue. Small, consistent checks beat annual heroics every time.

Operational changes that reduce true COGS

  • Materials: renegotiate suppliers, standardize packaging, reduce SKU complexity
  • Labor: implement standard work, track rework separately, cross-train for throughput
  • Overhead: right-size capacity, schedule preventive maintenance, manage energy costs

Case Study: Fixing Understated COGS to Fund Growth

I worked with a mid-size ecommerce brand posting a “healthy” 55% gross margin—yet chronically short on cash. Their COGS only reflected product purchase cost. Freight-in, 3PL pick/pack fees, and returns processing all sat in SG&A.

We reclassified those costs into COGS based on order volume, then discovered unrecorded shrink and obsolete inventory that had been overstating ending inventory for two years. Reported gross margin dropped from 55% to 42%. Painful on paper—transformative in practice. Within a year, they cut low-margin SKUs, renegotiated 3PL terms, and improved packaging to reduce damage, driving real gross margin back up to 47%.

Conclusion: From Understated COGS to Sustainable Profit

Understated cost of goods sold hides waste, overstates gross margin, and quietly increases your financial reporting risk. Fixing it takes accurate inventory, correct cost classification, and disciplined COGS calculation—but the payoff is decisions rooted in reality instead of illusion.

When I sit down with founders, I tell them the same thing: you can’t fix what you won’t face. Once your COGS is honest, every improvement you make shows up in real profit—not just prettier reports. If you want expert help untangling your COGS and inventory accounting, my team does this every day. Visit Complete Controller and let’s get your margins working for you, not against you. Complete Controller. America’s Bookkeeping Experts

Frequently Asked Questions About Understated Cost of Goods Sold

What happens when cost of goods sold is understated?

Understated COGS overstates gross profit and net income, and usually reflects overvalued inventory or missing direct costs. The result is misleading financial statements, inflated tax liability, and risky operational decisions built on bad data.

What causes cost of goods sold to be understated?

The most common causes are overstated ending inventory, misclassifying direct costs (like freight-in or production labor) as operating expenses, and failing to record scrap, shrink, or obsolete inventory write-downs.

How do inventory errors affect cost of goods sold?

Overstated ending inventory leads to understated COGS and overstated income. Understated ending inventory does the opposite—overstating COGS and understating income. The relationship is direct and inverse.

How do you correct an understated cost of goods sold?

Recalculate COGS using accurate beginning and ending inventory, reclassify all direct materials, labor, and overhead into COGS, adjust inventory values, and if the misstatement is material, correct prior financial statements to comply with GAAP.

What is included in COGS under GAAP?

GAAP COGS includes all direct costs of producing goods sold—materials, direct production labor, and manufacturing overhead tied to production—along with inbound freight. It excludes selling, general, administrative, and non-operating costs.

Sources

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Jennifer Brazer Founder/CEO
Jennifer is the author of From Cubicle to Cloud and Founder/CEO of Complete Controller, a pioneering financial services firm that helps entrepreneurs break free of traditional constraints and scale their businesses to new heights.
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Reviewed By: reviewer avatar Brittany McMillen
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Brittany McMillen is a seasoned Marketing Manager with a sharp eye for strategy and storytelling. With a background in digital marketing, brand development, and customer engagement, she brings a results-driven mindset to every project. Brittany specializes in crafting compelling content and optimizing user experiences that convert. When she’s not reviewing content, she’s exploring the latest marketing trends or championing small business success.
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