What each model actually is
Consignment: a supplier places stock at your location but keeps ownership of it until it sells. You hold and display it, but it is not your asset and does not count as your inventory value until a sale triggers the transfer — see the full breakdown on the consignment inventory page.
Backorder: you own the product line and normally stock it, but a specific order comes in after available quantity hit zero. You accept the order anyway on a promised ship date once replenishment arrives, rather than turning the sale away — the definition and how-to is on the backorder glossary page.
Dropship: you never hold the physical stock at all. A customer order is forwarded to a supplier or manufacturer who ships directly to the customer; your system tracks the order and the relationship, not physical inventory on your own shelf.
How they compare on the questions that matter
Who owns the stock: in consignment, the supplier does until sale. In backorder, you already do (or will, once replenishment arrives) — it is your product line, just temporarily at zero. In dropship, the supplier owns it the entire time; you never take title to it.
Where the risk sits: consignment shifts unsold-inventory risk to the supplier, at the cost of reconciliation overhead for you. Backorder keeps the risk with you but adds customer-trust risk if the promised date slips. Dropship removes inventory risk almost entirely but hands you fulfillment risk you do not control — a supplier stockout or shipping delay becomes your customer service problem with no stock on hand to fall back on.
What it needs operationally: consignment needs ownership-aware tracking (owned vs. consigned-in on the same shelf). Backorder needs accurate lead-time data and a review threshold for slipping dates. Dropship needs tight supplier stock-level visibility, since you are selling something you cannot physically check.
- Consignment: supplier owns it until sold; you track ownership status, not just location
- Backorder: you own the line; you accept a sale against future replenishment with a promised date
- Dropship: supplier owns and ships it; you never hold physical stock, only the order relationship
Which model fits which situation
Consignment tends to fit categories with unpredictable sell-through where a supplier wants shelf presence without pushing inventory risk onto you upfront — specialty goods, art, apparel with uncertain demand. It works poorly for your own core, fast-moving catalog, where the reconciliation overhead outweighs the benefit of not owning the stock.
Backorder fits products you already stock and control, where lead times are predictable enough to promise a real date — and where the margin or customer relationship justifies asking someone to wait rather than losing the sale outright. It fits poorly on low-margin, fast-moving items, where a slipping date causes more complaints than the sale is worth.
Dropship fits a long tail of low-volume or highly variable SKUs where holding physical stock yourself would tie up capital for uncertain demand, or where a specialized supplier can fulfill faster or cheaper than you could stock it. It fits poorly on margin-critical or brand-critical items, where losing control of fulfillment quality and speed is too costly to hand off.