The most common mistake when importing from the United States is comparing the product price there against the local price here. That math almost always favors importing — and it's almost always incomplete. The real cost has five components, and only one of them is the price of the goods. Here's the complete formula.
In this guide
The complete formula
None of those components is optional, and some are calculated on top of others — which is why underestimating them at the start carries the error all the way through.
1. Costs at origin
- Pickup: if the supplier doesn't ship themselves, someone has to collect the goods. Cost depends on the distance to the consolidation point.
- Supplier's domestic shipping: many US stores offer it free above a certain amount — worth taking advantage of.
- Sales tax: depending on the state, the purchase may carry local sales tax. It's not recoverable in your import, so it goes into the cost.
- Consolidation: grouping purchases from several suppliers into one shipment.
2. International freight
Here's the figure that breaks the most budgets:
CBM is length × width × height in meters. Practical consequences:
- Bulky, light cargo (plastics, textiles, furniture) gets charged by volume.
- Compact, heavy cargo (tools, metal parts) gets charged by weight.
- Empty space costs money. A half-filled box occupies CBM you pay for anyway.
In air freight the concept is volumetric weight: the airline charges on actual or volumetric weight, whichever is greater. That's why shipping something large and light by air usually costs far more than the scale suggests.
And in FCL the rate is per container, not per what you put inside — so cost per unit drops the fuller you pack it. The comparison is in FCL vs LCL: which one fits.
3. Duties on CIF value
Another point where budgets break: duties aren't calculated on what you paid for the product, but on the CIF value:
Import taxes apply to that base, not just to the supplier's invoice.
This means high freight doesn't only cost you the freight: it also raises the base you pay duties on. The breakdown of how those taxes are composed is in import duties in Costa Rica.
The other key variable is the product's tariff classification: two similar items can be taxed very differently. And if your goods qualify as originating in the US under CAFTA-DR, they may receive preferential treatment — with the corresponding certification of origin. Note: buying in the United States doesn't mean the product originates there.
* Rates depend on each product's tariff classification and current regulations. Check the exact heading with your customs broker before buying.
4. Local charges and delivery
- Port and terminal charges at destination.
- Deconsolidation, if the cargo arrives consolidated.
- Customs broker fees for processing the declaration.
- Storage, if the cargo sits beyond the free days at port — the most frequent surprise charge, and the most avoidable.
- Inland transport from port to your warehouse.
How to lower the total
- Consolidate. Several suppliers in one shipment spreads fixed costs across all the cargo instead of paying them five times.
- Use the supplier's free domestic shipping to the consolidation point.
- Optimize packing. Every cubic centimeter of air you ship, you pay for. See proper cargo packing.
- Group purchases over time. One planned monthly shipment costs less than four scattered rush jobs.
- Check CAFTA-DR before buying: it can change your math entirely.
- Ask for an all-in rate. A quote including freight, local charges and estimated duties avoids the classic "and now there's this to pay too".
- Clear the cargo quickly so you don't pay storage.
If your purchases are recurring, also check how long a shipment from the USA takes — planning the timing is what lets you use ocean freight instead of paying for air out of urgency.
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