Analysts expected a week of online sales events to bring in record revenue as consumers chase deals amid economic uncertainty.

After a slow start due to tariff concerns and an extended sale period, Amazon's (AMZN) Prime Day 2025 closed on a strong note, data show. The sale boosted spending across all retailers in the U.S. by 30.

That means your local sales tax rate — ranging from under 5% in some states to close to 10% or more in parts of Alabama and Louisiana — applies to many Prime Day purchases. For example, if you grab a $500 laptop online and live in a place with a 9.5% sales tax, you could pay an extra $47.50 at checkout.