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Profitability

Inventory Hero articles on profitability — practical guidance for Amazon FBA sellers.

  • June 10, 2026·5 min read

    Inventory Turnover Benchmarks by Industry, Explained

    Inventory turnover benchmarks vary widely by category. Rough ranges by product type, why they differ, and how to set your own target as an FBA seller.

  • June 3, 2026·5 min read

    The Benefits of Inventory Management for FBA Sellers

    The benefits of inventory management for FBA sellers: freed cash, protected revenue, lower costs, sharper decisions, and what poor management costs.

  • May 13, 2026·5 min read
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Calculating Ending Inventory: Formula, Methods, Mistakes

Calculating ending inventory: beginning inventory plus purchases minus COGS, or a physical count. The formula, methods, and why it drives your COGS.

  • May 10, 2026·5 min read

    Overhead Cost for Amazon Sellers: What Counts and Why

    Overhead cost is the indirect expense not tied to a unit: software, salaries, rent. Why it is separate from COGS, and how to fold it into true net margin.

  • May 9, 2026·7 min read

    Amazon Seller Accounting: What Makes It Different

    Amazon seller accounting has quirks: settlements, fees, inventory as an asset, and COGS timing. What to track, cash vs accrual, and when to get a pro.

  • May 8, 2026·5 min read

    Inventory Journal Entries: Debits, Credits, Examples

    Inventory journal entries record buying, selling, and adjusting stock. The standard debits and credits for each, with worked examples for Amazon sellers.

  • May 7, 2026·5 min read

    Inventory Valuation: FIFO, LIFO, and Weighted Average

    Inventory valuation decides which cost flows to COGS: FIFO, LIFO, or weighted average. What each means, how it moves profit, and which fits FBA.

  • May 6, 2026·5 min read

    Inventory Accounting for FBA: Assets, COGS, and Timing

    Inventory accounting treats stock as an asset until it sells, then expenses it as COGS. The core flow, perpetual vs periodic, and why timing matters.

  • April 27, 2026·5 min read

    Amazon Return Rate: How to Measure and Reduce It

    Your Amazon return rate is returns divided by orders. How to find it, what is normal by category, and the levers that actually bring it down.

  • March 29, 2026·5 min read

    TACoS vs ACoS: Which Amazon Ad Metric Actually Matters

    TACoS vs ACoS: ACoS measures campaign efficiency, TACoS measures ad reliance against total sales. The formulas, a worked example, and when to use each.

  • March 28, 2026·5 min read

    Amazon Gross Margin: What It Is and What It Hides From You

    Amazon gross margin is revenue minus cost of goods, over revenue. The formula, a worked example, and why it overstates FBA profit if you stop there.

  • March 27, 2026·5 min read

    Amazon Net Profit Margin: What Good Looks Like on FBA

    Amazon net profit margin is what you keep after every cost. The formula, an account-level example, a realistic FBA benchmark, and how to raise it.

  • March 24, 2026·5 min read

    Inventory-to-Sales Ratio: Formula and How to Read It

    The inventory-to-sales ratio is inventory value divided by sales: a fast read on whether you carry too much stock. Formula, example, and FBA context.

  • February 22, 2026·5 min read

    The Real Cost of a Stockout on Amazon FBA, Fully Priced

    A stockout costs far more than the missed sales: lost rank, a lower IPI, wasted ad spend, and a slow recovery. How to add up the true cost for FBA.

  • February 15, 2026·5 min read

    Landed Cost vs COGS: The Difference for FBA Sellers

    Landed cost vs COGS: landed cost is the full cost to get a unit to the warehouse; COGS is the cost of what you sold. Why FBA sellers must not confuse them.

  • February 14, 2026·5 min read

    Inventory Carrying Cost: The True Cost of Holding Stock

    Inventory carrying cost is the full cost of holding stock: capital, storage, risk, and handling. How to estimate the rate and use it in FBA decisions.

  • February 13, 2026·4 min read

    FBA Storage Utilization Surcharge: What Triggers It

    The FBA storage utilization surcharge targets overstock: holding too much inventory relative to your sales. What triggers it and how to avoid it.

  • February 12, 2026·3 min read

    Amazon Low-Inventory-Level Fee Explained (2026)

    The Amazon low-inventory-level fee hits standard-size items when your days of supply runs too thin. How the 28-day threshold works and how to avoid it.

  • February 11, 2026·5 min read

    FBA Inbound Placement Fee: How to Reduce It (2026)

    The FBA inbound placement fee in 2026: what it is, how shipment splits change it, and how to decide between paying the fee or shipping to more locations.

  • February 10, 2026·5 min read

    FBA Fulfillment Fees by Size Tier: 2026 Rate Guide

    How FBA fulfillment fees work in 2026: size tiers, dimensional weight, the per-pound surcharges, and how to keep packaging from jumping a tier.

  • February 9, 2026·4 min read

    Amazon Referral Fees by Category: 2026 Rates Guide

    How Amazon referral fees work in 2026: the 15 percent standard rate, how categories vary, the per-item minimum, and how the fee hits your margin.

  • February 7, 2026·4 min read

    FBA Long-Term Storage Fee: What Replaced It in 2026

    The FBA long-term storage fee was replaced by the monthly aged-inventory surcharge. What changed, why it costs more now, and how to avoid it.

  • February 6, 2026·4 min read

    Amazon Aged Inventory Surcharge in 2026: How It Works

    The Amazon aged-inventory surcharge in 2026: when it kicks in (181+ days), how it stacks on storage, and how to clear stock before it costs you.

  • January 26, 2026·4 min read

    FBA Storage Fees 2026: Monthly Rates and Surcharges

    FBA storage fees in 2026: the monthly per-cubic-foot rates, the Q4 peak increase, the aged-inventory surcharge, and how to keep storage costs down.

  • January 21, 2026·5 min read

    Cash Conversion Cycle for FBA: Formula and Example

    The cash conversion cycle is how many days your cash is tied up from paying suppliers to collecting from Amazon. Formula, example, and how to shorten it.

  • January 14, 2026·9 min read

    FBA Cash Flow Management: Complete Operator's Guide

    Cash flow, not profit, is what kills growing FBA businesses. The cash gap, the levers that close it, and how to build a reserve, for Amazon sellers.

  • January 11, 2026·8 min read

    Amazon FBA Fees in 2026: The Complete Cost Breakdown

    Every Amazon FBA fee in 2026: referral, fulfillment, storage, and the situational fees, with current rates, a worked example, and which ones you control.

  • December 21, 2025·6 min read

    FBA Contribution Margin: Formula, Example, Decisions

    Contribution margin is what each unit contributes after all variable costs. The formula, a worked FBA example, and why it drives which SKUs to fund or cut.

  • December 20, 2025·5 min read

    Inventory Turnover Ratio: Formula, Example, Benchmarks

    The inventory turnover ratio is COGS divided by average inventory value. The formula, a worked example, and what good looks like for FBA.

  • December 13, 2025·5 min read

    Days Sales in Inventory (DSI): Formula and Meaning

    Days sales in inventory (DSI) is how many days your stock sits before it sells. The formula, a worked example, and how it relates to turnover for FBA.

  • December 12, 2025·5 min read

    GMROI Explained: Gross Margin Return on Investment

    GMROI is gross margin divided by average inventory cost: the margin each inventory dollar returns. The formula, an example, and why it beats turnover.

  • December 10, 2025·5 min read

    FBA Reimbursements: How to Recover Money Amazon Owes

    FBA reimbursements: how to recover money Amazon owes for lost and damaged inventory. The discrepancy types to audit, the claim windows, and how to file.

  • December 4, 2025·5 min read

    COGS Formula: How to Calculate Cost of Goods Sold

    The COGS formula is beginning inventory plus purchases minus ending inventory. What counts, what does not, and a worked example for Amazon FBA sellers.

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