Side Hustles: What You Need to Know

Side hustles are more common than ever. Whether you’re consulting in your spare time, selling products online, driving for a delivery service, or turning a hobby into income, earning extra money can be a great financial move. But here’s the part many people overlook: when you become your own boss on the side, you also become responsible for your own taxes.

Unlike your W-2 paycheck, where taxes are automatically withheld, side hustle income usually comes with no withholding at all. That means you may owe income tax and self-employment tax (which covers Social Security and Medicare). Self-employment tax alone is 15.3% on net earnings.  That’s a number that surprises people who thought they were just “making a little extra on the side.” The IRS does not consider it a hobby just because it feels like one.

The good news is that side hustle income also opens the door to legitimate business deductions. Expenses that are ordinary and necessary for generating that income, such as supplies, mileage, software, home office expenses, and professional fees, may reduce your taxable profit. The key word there is profit. You’re taxed on what you earn after expenses, not total revenue. Good recordkeeping makes all the difference here (and shoeboxes full of receipts don’t count as a system).

Another area that catches people off guard is estimated taxes. If your side income is significant, you may need to make quarterly estimated payments to avoid underpayment penalties. Waiting until April to “see what happens” is rarely a winning strategy. A mid-year check-in can help you adjust withholding at your W-2 job or plan estimated payments before penalties jump in the picture.

Simple Example: How Side Hustle Income Gets Taxed

Let’s say Mark earns $120,000 at his W-2 job. In addition, he earns $20,000 from consulting on the side.

He also has $5,000 in legitimate business expenses (software, mileage, supplies).

Step 1: Calculate Net Profit

$20,000 income

– $5,000 expenses

= $15,000 net profit

Step 2: Self-Employment Tax

Mark owes approximately 15.3% self-employment tax on the $15,000. That’s about $2,295 in self-employment tax alone.

Step 3: Income Tax

The $15,000 is also added to his taxable income and taxed at his marginal tax rate (for many people in this income range, that could be 22% or 24%).

So while Mark earned $20,000 in gross side income, he won’t keep the full amount. And if he didn’t set money aside during the year, April could be uncomfortable.

The good news?

·        His expenses reduced his taxable profit.

·        Part of his self-employment tax is deductible.

·        With planning, he could adjust withholding or make quarterly payments to avoid penalties.

Bottom line: Side income is great - just plan for the tax bite so it doesn’t take you by surprise.

Side hustles can be financially rewarding and even personally fulfilling. But they shift you from employee to business owner in the eyes of the tax code, even if it’s just nights and weekends. With a little planning and organization, you can keep more of what you earn and avoid unpleasant surprises. After all, the goal of a side hustle is extra income… not extra stress at tax time.