Rent/utilities/groceries" is a huge category. I've lived in HCOL or VHCOL areas and managed to do better than that. How much are utilities and groceries? How large is your home?
Also, you are missing a ton of categories. (Eating out, clothing, travel, gifts...) As was mentioned, do a case study. Also, what are you total annual expenses. Even if you don't track, it should be easy to figure out. Take your income for each of the last two years, and subtract out however much you increased your savings by, then add the amount by which you credit cards increases. Clearly, you spent all the rest. Adding the For more useful info, you could subtract out what you paid for debt servicing. So often, people list their expenses by looking and figuring out what they should be. But when you compare that to salary, there is a huge difference, yet they haven't saved anything, so clearly they are missing expenses.