There are a few ways you can figure out your income, but the most common is probably just looking at your bank statements and finding the average of a few months. However, my all-time favorite way to get a grip on your finances is using Mint.
No, I’m not a Mint affiliate. I’m just crazy obsessed with it. Mint combines all of your accounts into one place and gives you an overview of how much you have earned and spent over the span of a few months. It gives you charts so you can see visually how your finances have fluctuated and where the average is. If you sing up for Mint, you can see right away what your monthly income is.