Advance-Deposit Wagering is a betting format where the player funds the account first and places bets after that. It is most commonly linked to horse racing.

The setup is straightforward: money sits in the account in advance, and a bet goes through only if the balance already covers it. There is no betting on credit here. First comes the deposit, then comes the wager.

This model is common in online horse racing services and other remote betting systems. The term is often shortened to ADW.

In practice, Advance-Deposit Wagering is simply a standard way of betting through a prepaid account. The key idea is not the type of bet itself, but the way access to betting is structured.