Hi Patrick,
Like Abiel said it depends on the broker you're using and your style of trading. Me as new trader sometimes I find it frustrating to pay all the commissions we need to pay but they do vary a lot on a daily basis depending on the partials you take, stock price, number of trades etc.
I use CMEG and on a day I make $50 gross, I end up paying anything from $10 on commissions (if I do less trades with less partials) to $25 maximum (taking several partials, maximum of 5 trades).
But again, you shouldn't let this influence too much your trading strategy, with smaller accounts it is normal for commissions to take more of your profits but if you start being consistent and slowly growing, commissions become less significant on your P/L over time!