CRO & Landing Pages
Yes, as early and accurately as practical. Customers do not enjoy discovering mandatory costs after they have already decided to buy.
A $100 product can become a $145 purchase after shipping and import charges. That is a different offer.
"Additional fees may apply" is better than silence and less useful than showing the actual expected cost where the technology supports it.
Domestic customers do not need international duty warnings. Show relevant information based on destination.
Tax and duty collection rules vary. Use Shopify Markets, your tax setup and current authoritative guidance rather than hard-coding broad claims.
Transparency may reduce some early conversion because customers see the true cost sooner. That can still be healthier than paying for checkout starts that were never commercially viable.
If international customers only learn the true order cost at the end of checkout, send us an inquiry. We can review how to make the offer clearer earlier.