There’s nothing more daunting on the web than a long page full of fields. Every field is a new reason to put off a purchase.
Studies have found that both one-page and multi-page checkouts can work under different circumstances. For mobile checkout, multi-page forms tend to work better. On desktop, some companies have found that simple one-page checkout pages actually perform better. What matters most is that the form is easy to navigate and focus on.
If you use a multi-page checkout, make sure it’s extremely clear how to proceed and show visitors their current progress. For single-page checkouts, consider using collapsable tabs or limit the number of fields visible on the screen at once to avoid overwhelming customers.