There are two sections to deduct TDS on advertising one u/s 194J and second u/s 194C. 194J is applicable when you give an amount to professional to prepare advertisement for you and 194C is applicable only when you make a contract with a person to publish your advertisement.
Here to TDS will be deducted when the aggregate amount exceeds 100000.. so TDS is to be deducted from 5th month onwards... this will not make any difference but it will will ease your cash flow for initial 4 month's