Google Inc is launching a credit card for advertisers in a move to increase ad spending as the competition in the market is growing.

The card will be offered to select Google’s clients in the US with a competitive interest rate, says Google. The card features ample credit line and no annual fee, and can be used only for paying for search advertising on the search engine website.

The AdWords Business credit card allows businesses to spend more on Google’s search ads when their needs arise.

Claire Johnson, vice president of global online sales at Google, said the credit card was designed to help small and medium-sized businesses that advertise on Google but who often don't have the funds to support a heavy ad campaign ahead of a big sales season, such as Valentine's day or Halloween.

Google will email invitations offering the credit card to some of its customers on Wednesday. The card will initially be available as a "beta" test, available to select users.