Yes, Tax is needed to be deducted in both the cases provided the amount paid to a person for the expenses has exceeded Rs 75,000/- in total or Rs 30,000/- in a single payment or if credit is given for a single entry of Rs. 30,000/- or an overall entry exceedin Rs. 75,000/-. In the given situation if the payment is made on various occasions each of which is Rs 30,000/- or less , then no tax is needed to be deducted. Moreover , application of Sec 194C Does not require any formal / written contract and it should be seen from person wise . Again if both type of Repairing is provided by the same person , then TDS is to be made as the total payment exceeds Rs 75,000/- pa