After a slow start at the box office on its opening day, Kaithi gained momentum at the ticket windows due to the raving reviews and positive word-of-mouth. Karthi's film has proved out to be the absolute winner with a strong upward trend from Day 2. The film which struggled to get screens due to Bigil which release alongside the film on October 25 has started getting its share of recognition with increased shows and added screens in all the 5 south Indian states and overseas market due to heavy demand and pressure for tickets.

At the end of 4 days, Kaithi has grossed Rs. 25+ cr at the domestic market. The film has entered 'profit zone' in Kerala, Karnataka, Rest of India (ROI) and USA. In Kerala, the film has been declared a 'hit' and heading towards attaining 'Super-hit' status. In Telugu states (AP / TG), where Karthi has a good fan base, Kaidhi has been performing very well in many centres there. 

Kaithi has grossed $175,631 (1.24 cr) in 4 days in USA and the film is a 'hit' there. The film distributed by ThinkBigg Pictures has entered the profit zone by earning a share of Rs. 45 lakhs while rights and promotion expenses add up to Rs. 35 lakhs. Due to the overwhelming response for the film, the exhibitors have managed to get 14 more screens against the demand for 35 screens.

In TamilNadu, the film has to gross Rs. 28 cr  (Rights - Rs. 16 cr) to achieve break-even status. In Kerala, the film has earned a share of Rs. 88 lakhs while the film rights were sold for Rs. 60 lakhs. The film has made a share of Rs. 2.45 cr in Telugu states and has to earn a share of Rs. 1.05 cr to achieve break-even. The film has achieved break-even mark in Karnataka and Rest of India with their rights sold for Rs. 75 lakhs (Share: 86 lakhs) and Rs. 15 lakhs ( Share: 23 lakhs) respectively.