Inventory Reorder Profitability Guide

A product may show positive per-unit profit while being a poor use of cash. The reorder could be too large, sell too slowly, require expensive storage, face falling demand, or prevent investment in a stronger item. Reorder decisions need unit economics and inventory timing, not margin alone.

Start with the SKU's recent net sales, contribution per unit, advertising cost, return rate, stockout history, and sell-through. Then update the next purchase with the current supplier price, freight, duty, preparation, exchange rate, minimum order quantity, and expected lead time. Old landed cost should not control a new commitment.

Landed cost includes unit purchase or manufacturing cost plus inbound freight, duties, inspection, labels, packaging, preparation, and other costs required before the unit is ready to sell. Divide shipment-level costs by usable units received. Defects and shortages can make cost per sellable unit higher than cost per unit ordered.

Request supplier quotes with clear incoterms, quantities, packaging, and validity dates. Model currency movement when purchasing in another currency. If a packaging revision changes dimensions or weight, update marketplace fulfillment, parcel, and storage assumptions as well as the factory price.

Estimate net selling price after expected discounts, then subtract landed product cost, selling fees, fulfillment, shipping, advertising, and return allowance. Multiply per-unit contribution by realistically sellable units, not the full order quantity when defects, samples, or unsold safety stock are expected.

ROI compares projected net return with the cash committed, but it must use a defined period. A 30% return over three months is different from the same return over two years. Track the expected date of supplier payments, inventory arrival, sales, marketplace reserves, and cash recovery.

Sell-through measures how much available inventory sold during a period. Weeks of cover estimates how long stock will last at expected demand. Use recent demand, seasonality, planned promotions, and lead time. Avoid extrapolating a launch spike or holiday period across an ordinary year.

A reorder should provide enough cover for lead time and a deliberate safety allowance without creating unnecessary storage and markdown risk. Separate stable products from trend-sensitive, seasonal, perishable, or version-dependent products. The cost of a stockout and the cost of excess stock are different for each category.

Test a lower selling price, higher advertising cost, slower sales, increased returns, higher storage, delayed inbound shipment, and supplier cost overrun. Calculate profit and cash recovery under each case. A reorder that only works at the current best-case price and ad performance may not have enough resilience.

For marketplace inventory, include aged inventory, removal, disposal, and long-term storage risk where relevant. For direct stores, include warehouse, fulfillment minimums, and discounting needed to clear slow units. A downside case should be uncomfortable but plausible, not an extreme designed to reject every purchase.

Rank potential purchases by expected contribution, ROI, payback time, demand confidence, operational complexity, and strategic importance. A lower-return staple may deserve inventory because it supports repeat customers, while a high-return experimental product may need a smaller test because demand evidence is weak.

Keep enough liquidity for advertising, freight, tax, payroll, returns, and supplier deposits. Inventory that looks profitable on paper can create cash pressure when payment is due before sales occur. Reorder quantity should reflect the business's ability to fund the full operating cycle.

Before approval, document supplier terms, landed cost, current price, contribution, margin, ROI period, ad cost, return allowance, demand forecast, lead time, weeks of cover, storage risk, cash requirements, and downside result. Record who supplied each assumption and the date it was checked.

After the inventory arrives, compare actual landed cost and sell-through with the plan. Update the next reorder instead of reusing the original forecast. A disciplined feedback loop turns each purchase into better evidence and reduces the chance that revenue growth hides slow, cash-intensive, or low-contribution stock.