#inventory
Inventory tracking, valuation, and management for businesses
The 2026 IRS 1099-K threshold for platforms like eBay, StockX, and Whatnot is back to $20,000 and 200 transactions, but sneaker and trading card resellers still owe tax on profit below that line — here's how to nail cost basis, inventory tracking, and the hobby-vs-business test.
Custom guitar luthiers should book customer deposits as a liability (deferred revenue) until delivery, track each tonewood set's acquisition cost and CITES paperwork individually rather than by replacement value, and use job-based WIP tracking to compare actual labor hours against a typical 40-80 hour build estimate.
GMROI measures gross profit generated per dollar of average inventory cost; a GMROI above 3.0 is generally strong, below 1.0 means inventory is destroying margin dollars, and typical category ranges run from 1.2 in grocery to 6.5+ in electronics.
Grain elevator bookkeeping separates elevator-owned inventory from bailment grain held for producers, tracks basis and deferred-price (NPE) contracts as distinct liabilities, and recognizes storage fees as service revenue earned over time rather than as a sale.
IKO's Basic Instructor Membership covers instructors for recreational liability but excludes students during lessons unless the instructor teaches through a recognized IKO Center, a coverage gap kiteboarding schools should reflect in separate insurance sub-accounts, fleet depreciation schedules, and worker-classification decisions.
A 50-square-foot hide costing $450 landed with a 64% yield rate has a real material cost of $14.06 per usable square foot, not the $9.00 the invoice implies — the gap driving margin surprises as 2026 tariffs and a shrinking U.S. cattle herd push leather prices up roughly 22%.
A wingback chair takes 7-8 yards of fabric and a sofa 15-22, but shops that price by materials plus a flat labor guess routinely underbill by 20-30% because the fully burdened labor rate and per-job overhead never get calculated — only the fabric receipt does.
Machine shops that track only labor and materials miss the two costs that decide whether a job is profitable — machine overhead and work in process — so aggregate revenue looks healthy while a third of jobs quietly lose money.
U.S. shoe repair revenue is roughly $315.6 million and shrinking about 2% a year since 2020, yet job costing, split inventory tracking, and correct sales-tax treatment of repair labor are what let surviving cobbler shops price resoles profitably and diversify into leather goods and wholesale work.
Independent bookstores net just 2-10% per the ABA's ABACUS survey, even with 40-50% gross margins. A practical bookkeeping guide to the transaction types that erode that margin — sale-or-return vendor credits, expiring co-op advertising funds, consignment and trade-credit liabilities — plus the 4-6x inventory turnover benchmark that predicts trouble early.
As of January 1, 2026, Colorado, Washington, and Oregon ban software-based parts pairing on electronics and appliances, forcing manufacturers to open OEM parts and diagnostic access to independent repair shops — here's what the new rules mean for compliance and inventory bookkeeping.
Amazon's 2026 FBA fee changes start the aged-inventory surcharge at 181 days instead of 271, add a steeper tier for stock over 12 months old, and raise the low-inventory-level fee threshold from 28 to 35 days of forecasted supply — now enforced per FNSKU variation. Here's who pays most, how to estimate your exposure, and why these fees belong as separate expense lines in your books.
