From Team Fortress Wiki
The Steam Wallet is a feature Valve has implemented into their Steam content delivery system for the purpose of micro-transactions. The Steam Wallet beta was released on September 10, 2010, and was officially released on September 30, 2010 in line with the Mann-Conomy Update. The Steam Wallet is essentially a bank on Steam which contains money to be spent on games, downloadable content (DLC), and in-game content.
In order to use their Steam Wallet, users must first add funds to it. The money that is added will be 'pre-loaded' so that bank details do not need to be exchanged at the time of purchase. Adding money is similar to how users currently make purchases through Steam, though a user must purchase at least a 5.00 / 4.00 / 5.00 / 150 increment for their Steam Wallet to make purchases. The player's current Steam Wallet balance is also displayed in the top-right corner of the Steam client window.
The Steam Wallet can be used to make purchases over the Steam Store, like how users could with a credit card or Paypal account, as well as make purchases in-game. In-game purchases can be done quickly through the in-game browser simply by verifying the purchase. If users do not have enough money in their Steam Wallet, they will be able to add more funds at the time of purchase.
The only way to buy items from the Mann Co. Store is through the Steam Wallet. Once a user checks out from the store, they are brought to the in-game browser and asked to verify their transaction or to add additional funds to their wallet. Once the transaction has been verified, the money required is automatically transferred and players will receive their item.
Users can add funds in the following increments to their Steam Wallet via the Steam website or the Mann Co. Store:
- 5.00 / 4.00 / 5.00 / 150
- 10.00 / 10.00 / 10.00 / 300
- 25.00 / 25.00 / 25.00 / 750
- 50.00 / 50.00 / 50.00 / 1500
- 100.00 / 100.00 / 100.00 / 3000
Users are limited to these amounts when adding funds to their Steam Wallet via the Steam website, however, funds can be added in any amount when purchasing from the Mann Co. Store, provided that the amount is greater than the minimum amount of5.00 / 4.00 / 5.00 / 150 .
Users can view their personal purchase history in the Steam purchase history screen, which includes game purchases and in-game microtransactions, although exact quantities of items purchased through microtransactions are not listed. Records of funds being added to the user's Steam Wallet are also listed here.
The Steam Subscriber Agreement states below that Steam Wallet funds cannot be refunded, as well as have no real-world value outside Steam. The Agreement also states that when attempting to make a transaction with Steam Wallet that lacks sufficient funds, and the user has a credit card set in their account details, Steam will charge the remaining or whole amount to the credit card instead.