Amazon is planning to charge U.S. sellers a 3.5% fuel and logistics surcharge for fulfillment services, as the company looks to manage increased costs brought on by the ongoing conflict in Iran.

According to an April 2 update to sellers from Amazon, the surcharge will kick in on April 17 for Fulfillment by Amazon sellers from the U.S. into Canada, Mexico and Brazil, covering those who sell their inventory directly through Amazon's platform. The fee will then take effect on May 2 for Buy With Prime customers in the U.S. and Canada, for sellers who use Amazon's shipping and fulfillment services but operate out of their own e-commerce websites.

"Elevated costs in fuel and logistics have increased the cost of operating across the industry," the company said, noting that so far it has absorbed those increased costs. "However, similar to other major carriers, when costs remain elevated, we implement temporary surcharges on our fulfillment fees to recover a portion of the actual cost increases we are experiencing."

Amazon further clarified that the surcharge will be applied to fulfillment fees, not on the sale price of items. The company also asserted that the 3.5% surcharge "is meaningfully lower than other major carriers." In late March, the U.S. Postal Service announced an 8% fuel surcharge of its own on packages, marking the first time the agency has ever levied such a fee.