If you've found yourself in a situation where you need to split your purchase on Target.com between multiple cards, you've also come to realize that - unlike the brick and mortar Target stores - Target.com does not offer a way for you to split your payment up.
Don't worry, below i'll describe a simple trick to split your payment on Target.com using Target Gift Cards.
Purchase this Target Gift Card with one of your debit or credit cards. For example, I used my credit card to buy the gift card. Choose an amount for your gift card that is about half the cost of the item you want to buy from Target. Remember to select "e-mail" for the "Send by" option and so that you receive your custom gift card immediately.
You can purchase a gift card with a custom amount here:
After purchasing this gift card you will be emailed a gift card and access number. Copy those numbers as you will need use it in the next step.
Now that you have your gift card number and access number, you can now proceed to checkout the item you want to split with the gift card and your other debit or credit card.
If you have any questions ask below in the comments and i'll try to answer them.