When you make a transaction that’s an even dollar amount, you can choose how much you invest into your Acorns Invest account. It can be anywhere from $0 to $1. 

You can choose the amount by following the below steps:

For Mobile:

1. After logging in to your account, tap "Invest for your future"
2. Tap "Round-Ups Settings"
3. Under "Whole Dollar Round-Ups", slide the bar to your preferred whole dollar Round-Up amount
4. Tap "Save"

For Web:

1. After logging in to your account, click on "Invest for your future"
2. Click on "Round-Ups Settings"
3. Under "Whole Dollar Round-Ups", slide the bar to your preferred whole dollar Round-Up amount