For most Americans, their monthly pay isn't consistent or predictable, making it challenging to estimate how much they have to cover things like food, rent, utilities, cell phone bills and even going out with friends. The average American family routinely experienced a 36% change in income month-to-month from 2013 to 2018, according to a recent report released by JPMorgan Chase Institute.

And if your income varies each month, it can make building a budget — already a challenge for many Americans — very difficult. But Tiffany Aliche, personal finance expert and founder of The Budgetnista, says it's not impossible to create a simple and realistic budget, even if you don't have a steady income stream.