Polling conducted by González/Valladares/MGMR for Perfil on the 27th of July 2014 has dissident Peronist Massa leading with 28,6%, followed closely by Kirchnerist Scioli (23,9%) and conservative Macri (23,4%). Former vice-president Cobos comes in as distant fourth, as hypothetical UNEN-candidate with 17,3%.
Polling conducted by Aragón & Asociados in September showed a lead for Sergio Massa with 28,81% of the votes, followed by a tie between Daniel Scioli and Mauricio Macri with 23,67% and 23,64% of the votes respectively. On the fourth place appears Hermes Binner with 13,34% of total votes. 
A new poll conducted by Raúl Aragón & Asociados predicted first-round results of 26,1% for Sergio Massa, 24,8% for Daniel Scioli and 21,3% for Mauricio Macri. 
Management & Fit, which were the first to predict a three-way tie in the winter of 2014, they now see Scioli at 24,7%, Macri at 23,7% and Massa at 17,2%. 
The consulting firm OPSM published two polls. The results for the first poll were Scioli with 26,0%, Massa with 22,7%, Macri with 21,2% and Hermes Binner, as UNEN candidate, with 11,2%. The second in which the UNEN-alliance fractures and doesn't present a unique candidate would have Scioli at 26,7%, Macri at 24,8% and Massa at 20,4%. 
Polling conducted by IPSOS, shows a widely different scenario, predicting 31% for Massa, 30% for Scioli, 22% for Macri and 4% for Julio Cobos as UNEN representative. 
Polling conducted by Management & Fit for the first time have Mauricio Macri leading the race at 27,9%, ahead of kirchnerist Scioli with 23,6% and dissident Peronist Massa at only 18,8%. This is a remarkable change according to the pollsters as in early 2014 Macri only counted with the support of 10% of interviewees. The interviews were conducted in late January/early February, before the public marches in support of late attorney Alberto Nisman, which experts agree have benefitted Macri. The same poll also revealed UNEN candidates Cobos and Binner at 6,5% and 5,3% respectively, and FIT candidate Jorge Altamira at 2%.
Another poll by Poliarquía also sees Macri in the lead with 28%, followed closely by the current government's candidate Scioli at 26% and at a slightly greater distance by Mass with 24%. The firm underlines the great results for opposition politician Macri, as he more than doubles his voting intention in the past year, rising from 12% to today's 28%. Scioli also saw a rise from 21%, whereas Massa remained constant at around 23/24%.
According to Opinión Pública Servicios y Mercados for Crónica Mauricio Macri and Daniel Scioli would face in the second round runoff vote, getting 33,1% and 28,0% of votes in the first round respectively. Once promising candidate Sergio Massa sees himself relegated to a distant third place with a mere 16,2%. Potential UCR candidate Julio Cobos can hope for 10,6% of the electorate. 
In four polls published at the end of March results varied greatly:
Numbers released by Polldata have Macri first at 26,4%, followed closely by Massa (24,2%) and Scioli (23,1%), further Socialist Party candidate Margarita Stolbizer could count on 5,1% of votes and perennial Worker's Front candidate Jorge Altamira receives 3,3%; 6,7% of interviewees have pronounced themselves for another candidate, whereas the remaining 11,2% are undecided.
Pollsters Management & Fit see a tight race between government candidate Scioli at 29,5% and Buenos Aires mayor Macri at 28,8%, relegating Massa to a distant third place with 14,3%, followed by Stolbizer with 4% and Altamira with 3%.
According to Giacobbe & Asociados opposition candidate Macri leads the race with a great margin, standing at 31,2%, where Scioli can count on only 19%, Massa on 15,4%, former Socialist candidate Binner on 4,5% and leftist Altamira on 3%. 10,4% of the surveyed chose another candidate, whereas 16,5% did not know whom they will vote for.
Lastly Poliarquía sees the lead inverted, estimating support for Scioli at 31%, Macri coming in second with 25%, followed by Massa at 21%, Cobos as UNEN candidate with 7% (although Cobos has since pulled out of the race, due to his party voting to ally itself with Macri's PRO) and Altamira at 3%; 10% of respondents have yet to decide whom they will vote for. 
A poll conducted in early April 2015 by Consulting firm Poliarquía sees FPV-candidate Scioli leading the race with 33,4%, second comes Macri at 27,3%, again followed by Massa at 20,1%. Other candidates are Socialist candidate Margarita Stolbizer at 6,4% and Communist candidate Altamira at 2,3%.