There will be several steps of price increment for .COM domains by Verisign. Verisign means the owner of .COM TLD. The previous year's 1st step has been done and here it is again the 2nd step.
This is the first Notice.
This is an official news article.
Please refer to them both first.
From September 1st, .COM Domain's price will be increased by 1$. Currently, it is 12.5$ per year and it will be 13.5$ per year. Registration, Renewal, and Transfer applied.