Nothing sours a first cross-border shipment like a knock at the door and a bill nobody was expecting. It's the single biggest source of support tickets we hear about from customers who've used other couriers -- and it's entirely avoidable.
Every WorldBridges label that crosses the US–Canada border carries a duties estimate calculated at the moment you book, using the declared value, category, and destination province or state. It isn't perfect -- customs has the final word -- but it means nobody is surprised.
Under the hood this is the same rating engine that powers our public rates API, so the number you see on the booking screen is the same one a developer would get calling POST /v1/rates directly.