amazonprimeAmazon’s move to enhance its same-day delivery program will provide another benefit to Amazon Prime members, letting them receive eligible items on the same day for a flat $5.99 shipping fee per order, with no extra charges, for as many eligible items as they can order.

People who aren’t enrolled in Amazon Prime will pay an $8.99 fee plus another 99 cents per item.

Those are some of the official details released by Amazon this morning after news of the expansion and changes to its same-day delivery program leaked overnight.

The new perk for Prime members is the latest attempt by Amazon to add more value for Amazon Prime members, who face a price increase from $79/year to $99/year.

The core Amazon Prime feature is free two-day shipping, along with Amazon Prime Instant Video and Kindle book rentals, but the company has recently added additional perks including its Prime Pantry service and discounts on Kindle Fire tablets.

Also today, Amazon confirmed that it’s releasing a new “Get It Today” and “Get it by Tomorrow” search feature for customers in Phoenix, San Francisco and Seattle, allowing them to check a box after they search for products on Amazon.com to see only those items available for same-day delivery.

The features are rolling out starting today. Amazon says they will be extended later this year to the rest of the cities where Amazon same-day delivery is currently available, a list that currently numbers twelve. Customers can order as late as noon and receive delivery by 9 p.m. on the same day.

In addition, Amazon released a new section of its site featuring items available for same-day delivery.

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