How to Diversify Suppliers and Control Landed Costs

Diversifying your suppliers can help protect your business from factory closures, production delays, and unexpected disruptions. It can also give you more flexibility to compare prices, negotiate terms, and respond to changes in demand. But adding a second supplier or sourcing country can also affect your landed cost. Smaller shipments, different minimum order quantities (MOQs), […]

But adding a second supplier or sourcing country can also affect your landed cost. Smaller shipments, different minimum order quantities (MOQs), shipping terms, and tariffs can all change what you pay to get your products to your door.

In this guide, we’ll explain where those additional costs come from and how to manage them, so you can build a more resilient supply chain without spending more than you need to.

What landed cost actually includes

Landed cost is the total cost of getting your products from your supplier to your door, including shipping, duties, and other import charges. To calculate your landed cost per unit, divide that total by the number of units you receive. Here’s what’s included:

Product cost: the supplier’s unit price, plus any tooling, packaging, or sample charges.
International freight: ocean (FCL or LCL) or air, from the handover point named in your Incoterms to the US port or airport.
Cargo insurance, if you buy it.
Duties and tariffs: the base rate for your product’s HTS code, plus any additional tariffs tied to its country of origin.
Customs fees: for formal entries, the Merchandise Processing Fee (MPF), plus the Harbor Maintenance Fee (HMF) on ocean shipments.
Brokerage and destination charges: entry filing, terminal handling, and delivery to your warehouse.

In the US, import duties are generally calculated based on the customs value of the goods, which excludes international freight and insurance when those costs can be properly identified and documented. Two suppliers offering the same unit price could therefore have similar duty costs but very different landed costs once shipping is included.

US imports may also be subject to customs processing fees. The Merchandise Processing Fee (MPF) generally applies to formal entries, while the Harbor Maintenance Fee (HMF) applies to certain ocean imports. Both should be included when calculating your landed cost.

Our guide to working out your landed cost step by step covers the full calculation, and you can estimate the duty on a specific product and origin before you request supplier quotes.

How adding suppliers can affect your landed cost

Each of the factors below can potentially increase landed cost. Whether it does depends on your volumes, products, suppliers, and routes, and each one has a way to check it in advance.

Smaller shipments can change your freight costs

If you split one supplier’s volume between two, each order may get smaller. A load that filled a 40-foot container could become two partial loads from two factories. That changes the math between full-container (FCL) and less-than-container (LCL) shipping.

FCL is priced per container, so your freight cost per unit could rise as the container gets emptier. LCL is priced by the space or weight your cargo takes up, which can work out cheaper for small loads and more expensive for loads close to a full container. Which option costs less depends on your volume, the route, and current rates.

More shipments can also mean more customs entries, potentially increasing brokerage fees and Merchandise Processing Fees (MPF). For formal entries subject to MPF, a minimum fee applies to each entry, so splitting imports into smaller shipments can increase your total costs.

How to check it: before you split an order, get FCL and LCL quotes for the volume each supplier will actually ship. If both suppliers are near the same port, ask your forwarder whether combining their cargo into one shipment is an option on that route. Our comparison of how FCL and LCL costs are calculated can help you find the break-even point.

A new supplier may have its own MOQ

A second supplier may set its own minimum order quantity. Meeting two MOQs can mean ordering more units in total than you planned, which ties up cash and warehouse space. And if a supplier prices by order size, splitting your volume can move you onto a higher-priced tier.

How to check it: ask each new supplier whether they accept sample orders or a lower MOQ on a first order, and how their price breaks work. Then weigh any unit-price difference against what the extra inventory costs you to hold.

Suppliers may quote on different Incoterms

One supplier might quote EXW, where you pay for everything from their factory door. Another might quote FOB, where they cover costs until the goods are loaded at the origin port. A third might quote DDP, where they deliver to your address with duties paid. The unit prices can look similar while each covers a different set of costs.

How to check it: add the costs each quote leaves out, so every option reflects the full cost to your door. Our breakdown of what changes between FOB and DDP shows which costs shift between buyer and seller. The section on comparing quotes below covers this in more detail.

Higher tariffs in your new supplier country could wipe out savings

A lower factory price in a new country can disappear once duty is added. Duty rates depend on your product’s HTS classification and its country of origin, and US tariffs on specific countries have changed several times in recent years. A new factory can also add compliance costs. Depending on the product, you may need new test reports or certificates for goods made at a different factory, for example with children’s products regulated by the CPSC.

How to check it: Compare the applicable duty rates for each HTS code and country of origin before committing to a new supplier, and ask what product testing and certification documentation they can provide.

Shipping flexibility can also help manage supply chain risks

Having more than one way to move goods can give your logistics room to adjust. You might send a small urgent top-up by air while the main order travels by ocean, or switch between booking a full container and sharing container space with other shippers as your volumes change.

That flexibility helps with transport problems such as port congestion, limited capacity, or delays on one route. It doesn’t help if your only supplier has a production problem, fails a quality check, or closes. Supplier diversification is what covers those risks. Treat the two as separate decisions: shipping options give you flexibility in how goods move, and a second supplier gives you another place to get them.

How many suppliers is the right number?

There’s no single right number. It depends on how much a supply disruption would hurt your business, how many SKUs you carry, and how much volume you have to spread around. Two considerations are worth looking at separately:

Supplier pricing. Some suppliers offer lower unit prices at higher volumes, so spreading orders across more factories can reduce the volume each one sees.
Freight. Smaller orders per supplier can mean smaller shipments, which changes your freight cost per unit as described above.

Common setups include a main supplier with a backup approved for the same products, different suppliers for different product lines, or suppliers in two countries for your highest-risk items. Each has trade-offs. A backup you order from rarely may be slower to respond when you need it, and splitting by product line spreads risk across the business while leaving each product with one source.

Use Incoterms to compare supplier quotes on the same basis

You don’t need every supplier on the same Incoterm. Different terms can suit different suppliers, depending on their location and freight arrangements. What you need is to account for what each quote includes, so you compare landed costs on the same basis. For each quote, confirm:

Where the supplier’s responsibility ends
Who books and pays for the main international freight
Who handles export clearance and US import clearance
Who pays duties, and whether the quoted price already includes them

Then fill any gaps with your own freight quote and duty estimate. With DDP quotes in particular, ask the supplier to itemize which charges are included, since this can vary between suppliers.

Comparing countries on landed cost, not just unit price

When you evaluate a second or third sourcing country, the factory quote is a starting point. The factors below can each move the final number.

Factor	What to check	How it can affect landed cost
Duties and additional tariffs	Base rate for your HTS code, plus any tariffs specific to that country of origin	Can cancel out a lower unit price, or add to your savings if the rate is lower
Freight and transit time	Quotes from the new origin port to your US port, and typical transit times	A longer or less frequent route can add freight cost and inventory holding time
MOQs and price tiers	Supplier minimums and pricing at your realistic order size	Higher minimums tie up cash; smaller orders can cost more per unit
Quote terms	The Incoterm on each quote	Determines which freight and customs costs you need to add yourself
Compliance and testing	Product-specific requirements (such as CPSC or FDA) and the supplier’s documentation	New testing or certification can add cost before your first shipment
Supplier track record	Samples, references, and inspection results	Late shipments or failed inspections can cost more than the price difference saved

For a side-by-side look at three common sourcing countries, see how China, Vietnam, and India compare on cost, risk, and complexity. Tariff rates change often, so confirm current rates before making sourcing decisions.

What to consider before adding a supplier

These don’t need to happen in a fixed order. Which ones matter most depends on your product and your reason for diversifying.

Test with samples or a small first order. A small order shows you real lead times, packaging, and quality before you move meaningful volume. Our guide to getting and shipping product samples covers the logistics.

Compare suppliers on more than price. Tracking quality, lead times, and communication on a simple supplier scorecard makes it easier to compare a new supplier with your current one.

Plan how volume will shift. Moving volume gradually or by product line changes your shipment sizes, so re-run freight quotes as the split changes.

Put terms in writing. Confirm the Incoterm, payment terms, lead times, and who pays for what before the first production order.

Decide whether you need help on the ground. In an unfamiliar country, a sourcing agent can help find and vet suppliers. Here’s what a product sourcing agent does and when one is worth the cost.

Estimate landed cost before you place an order

The simplest protection against cost creep is to estimate landed cost for each supplier option before you commit. A freight quote tells you what it costs to move each supplier’s volume on its route, and a duty estimate helps you estimate the duties you’ll pay . Add product cost, insurance, and customs fees, and you have a number you can compare across suppliers.

Our guide to using a freight cost calculator explains what goes into a freight estimate, and the Ship4wd tariff calculator covers the duty side. Freight rates and tariffs can change between your first quote and your purchase order, so re-run both before you confirm the order.

Frequently asked questions

Does sourcing from a second country always increase landed cost?

No. A second country can raise or lower your landed cost depending on its duty rates, freight costs, supplier pricing, and how your order sizes change. It can lower costs if the new origin has lower tariffs on your product or a better unit price that holds up after freight. Estimate the full landed cost for both options before you commit volume.

How much volume should stay with your primary supplier?

There’s no standard split. The right balance depends on your business, your suppliers, and what you want diversification to achieve, whether that’s a ready backup, lower tariff exposure, or extra capacity. Look at how each supplier prices by volume and how your shipment sizes will change, then adjust as you learn how the new supplier performs.

How Ship4wd helps you diversify without losing cost control

If you want to add or compare suppliers in China, Ship4wd’s sourcing platform lets you find verified Chinese suppliers and compare them in one place. You can browse products from verified suppliers on 1688 in English with USD pricing, and see your full landed cost, including product, shipping, customs, and duties, before you commit. Orders are inspected at Ship4wd’s China warehouse, and nothing ships until you approve the inspection photos.

For suppliers in other countries, you can get FCL, LCL, and air freight quotes on the Ship4wd platform, weigh them against each supplier’s quote terms, and add a customs clearance to your booking .

See how Ship4wd works and get a freight quote for your next supplier’s shipment.

How to diversify suppliers while keeping landed costs under control