Do I have to plan a budget if I'm able to save 10% of monthly paycheck?

It is necessary since a budget helps you track your expenses. It helps you to adjust with different financial stages of your life.

Without a budget, you will not understand where your money is going.

A budget is a pre-requisite to manage finances well. So, do plan a suitable budget for a good financial future.

Yes, it is necessary. You never know, you might be able to save 20% if you plan a budget.

Through budgeting, you may contribute a portion of your earnings each month for investing in your IRA, 401(k) or other retirement funds, you'll eventually build up a nice, fat nest egg. Also, without budgeting, you might not know whether you can afford a new flat-screen TV, a new car, or any other big purchases.