Starting a side hustle can cut your tax bill by letting you write off costs you otherwise couldn't, which is good news for anyone looking to keep more of their income.

• A side business lets you write off part of your home, utilities, phone, car, and laptop.
• Almost anything "necessary and ordinary" for the business counts, even work uniforms.
• Setting up an S corp opens up bigger tax breaks.
• You can put up to $2,500 per employee or child into a pre-tax account, and the business writes that off too.
• That money can go into a child's account, lowering what you owe now.

Outlook: Expect more people to start small side businesses as a way to shrink their tax bill.