Landed Cost vs. Unit Cost: Why Comparing Suppliers on Price Alone Gets You Burned

You have three quotes in a spreadsheet. You sort by unit price, the lowest one floats to the top, and it looks like an easy call.

Then the first shipment lands, and the supplier you passed over would have cost you less. The unit price was never the number that mattered. The landed cost vs. unit cost gap is where supplier decisions quietly go wrong, because it changes depending on where a product is made, how it ships, and what terms the quote assumes.

What is the difference between landed cost and unit cost?

Unit cost is the per-unit price on a supplier's quote. Landed cost is what each unit costs once it's delivered to your dock, cleared through customs, and ready to sell. Unit cost is one input to landed cost, not a substitute for it.

The formula is the same one Izba's landed cost calculator uses: Landed Cost = Product Cost + Freight + Duty + Fees. Product cost is the unit price from the quote. Freight, duty, and fees are what the quote leaves out, and they're the part that varies most from one supplier to the next.

Why does the cheapest unit price often lose on landed cost?

The cheapest unit price often loses because freight, duty, and fees depend on where the supplier is, not just what they charge. Duty is set by your product's HTS code and its country of origin, and small changes in either can move the rate significantly (opens in new tab). Freight depends on the shipping lane and mode. Fees depend on the entry, the port, and the paperwork.

Sourcify's landed cost guide makes the same point with two factories: one quotes $8.00 a unit and ships into a 25% duty lane, the other quotes $8.50 into a 5% lane, and the duty difference alone can reverse the decision (opens in new tab). The more expensive factory can be the cheaper supplier.

A worked example: two suppliers, one product

Say you're sourcing the same product from two suppliers for a 5,000-unit order. The rates below are illustrative, not quotes.

Supplier B is 10% more expensive on unit price and 7.4% cheaper once it lands. On 5,000 units, that's $3,100 you'd have left on the table by sorting on the quote.

The gap between FOB and delivered cost is also different for each supplier: about 39% for A and 17% for B. If you only compared unit prices, you'd never see that. If you're not sure where the rest of your fee line comes from, our post on five hidden costs that blow up your landed cost estimate (opens in new tab) covers the ones that get missed.

Are your supplier quotes even comparable?

Often they aren't. Quotes can be written on different Incoterms, and an ex-factory (EXW) price is the cost of the product at the factory door, while an FOB price adds the move to the export port and loading onto the vessel. One source puts it plainly: the seller's responsibility under FOB ends the moment the goods are loaded (Toolio (opens in new tab)). An EXW quote beside an FOB quote isn't a like-for-like comparison, because the EXW price leaves out costs the FOB price already includes.

Before you compare anything, put every quote on the same footing. Ask each supplier to quote the same specification, the same quantity, the same Incoterm, and the same destination. One sourcing platform's checklist also suggests confirming the currency and what the price includes, such as packaging, tooling, and testing (SourceReady (opens in new tab)).

If two suppliers won't quote on the same terms, ask for both an EXW and an FOB price from each, so you can see where the logistics markup sits. For a refresher on what FOB covers, see our breakdown of FOB vs. landed cost (opens in new tab).

What else should you compare besides landed cost?

Landed cost is the floor for a fair comparison, not the whole decision. Once the quotes are on the same terms and the landed costs are calculated, a few other factors can still change the answer.

• MOQ and price breaks. Price tiers change the math. In Sourcify's MOQ example, an order of 500 units costs $9,250 and an order of 1,000 costs $15,200. That's $5,950 more up front for $3.30 less per unit, and it only pays off if you sell the extra units before carrying costs eat the savings (Sourcify).
• Payment terms. A slightly higher unit price can be the better offer if it requires a smaller deposit or gives you stronger protection on defects (SourceReady).
• Lead time. Ask when the clock starts. Quotes can leave out material purchasing, sample approval, testing, and inspection.
• Quality and defect costs. A low price can reflect wider tolerances or fewer inspections. Defects mean sorting, rework, returns, and expedited replacements.
• Stability and risk. Sourcify's guidance is to compare full landed cost scenarios side by side while weighing cost, stability, and operational risk together.

None of these show up in a unit price. All of them show up in your P&L.

How do you compare suppliers on landed cost?

Compare suppliers by running each quote through the same four inputs and putting the results side by side. Here's the sequence:

1. Get every quote on the same specification, quantity, Incoterm, and destination.
2. Collect product cost, freight, duty rate, and fees for each supplier. The duty rate comes from your product's HTS code and country of origin.
3. Convert freight and fees to a per-unit number by dividing the shipment-level cost by the units in the order.
4. Calculate landed cost for each supplier and rank them on that number.
5. Then weigh MOQ, payment terms, lead time, and quality before you decide.

Do step four with the same tool for every supplier, so the comparison doesn't depend on whose spreadsheet is more generous with the fee line.

Common questions about landed cost vs. unit cost

Is unit cost the same as landed cost? No. Unit cost is the per-unit price on the supplier's quote. Landed cost adds freight, duty, and fees to show what each unit costs delivered to your dock.

Should I always choose the supplier with the lowest landed cost? Not automatically. Landed cost is the right basis for comparing price, but it doesn't capture MOQ, payment terms, lead time, or quality risk. Use it to compare suppliers on cost fairly, then weigh those factors before you decide.

How do I compare quotes that use different Incoterms? Ask each supplier to requote on the same Incoterm, quantity, specification, and destination. If they can't, request both an EXW and an FOB price from the same supplier for the same order, then add the same freight, duty, and fees to each.

Run each supplier through the same numbers

Take your top two or three quotes and enter each one's product cost, freight, duty rate, and fees into Izba's landed cost calculator. Then compare the landed cost per unit, not the price on the quote, and see which supplier is actually the cheapest.