In the menu At the top of the control panel (WebSMS application) the balance of standard SMS messages remaining to the default country of the account is shown. Placing the cursor over this field also shows the number of credits  of the account.

In the section History of consumption it is possible to consult all the recharges and consumptions made filtering by dates and grouped by concept.

In any submission form of the WebSMS application you can see the credits that it will consume any sending and credits available on the account.