As we have stated earlier that interface of Bing Ads is a bit difficult and each time we remind them to compare themselves with Google and they say that Google has been in business for long and they are refining.
Finally we found the ways and means to check accounts prepay funds balance and following steps may be followed:
1. Click the Accounts & Billing page.
2. These steps use our updated Accounts & Billing page. If you see Use the new version, click it before continuing.
3. Under Accounts, click your account number.
4. Your balance info is displayed on the right side of the page.
Hope it will be help you to get a better perspective of Bing Ads.