There's a loophole that lets you spend less than $25 to order Add-on Items from Amazon

Amazon's Add-on program is incredibly useful, but it can also be a pain.

Add-on Items are cheap products that the company deems "cost-prohibitive to ship on their own." Many of them are everyday household items — like toothpaste or pens — that could save you a trip to your local convenience store.

But there's a catch: Amazon has a $25 minimum-order requirement, and that's not including the Add-ons.

Luckily, there's a loophole that lets you get around the $25 restriction. Here's how it works:

Disclosure: Jeff Bezos is an investor in Business Insider through his personal investment company, Bezos Expeditions.

Choose your Add-on Items and add them to your cart. I needed some toothpaste.

Jacob Shamsian/INSIDER

Then add a preorder item to your cart. Here I am ordering "Harry Potter and the Cursed Child."

Jacob Shamsian/INSIDER

If your total order is over $25, then Amazon will let you make the purchase!

Jacob Shamsian/INSIDER

The trick is to buy a preorder item along with the Add-on Items you want. Amazon will let you complete the purchase, and Add-on Items will ship normally, while the preorder item will be shipped whenever it's released.

If you don't want the preorder item, then you can just cancel the order at any time before it ships.