The tax bill nobody warns you about

When you work a regular job, your employer quietly takes Social Security and Medicare taxes out of every paycheck — and pays a matching amount on your behalf. You barely notice it.

When you drive for Uber, deliver for DoorDash, or pick up any kind of 1099 work, there's no employer doing that for you. The IRS still wants that money. It just comes from you, in one extra tax called self-employment tax.

This is the tax that surprises a lot of gig workers at filing time. It's separate from your regular income tax, and it can add up to thousands of dollars a year depending on how much you earn.

What self-employment tax actually covers

Self-employment tax funds the same two programs that regular payroll taxes fund: Social Security and Medicare. You're self-employed for this purpose if you're a sole proprietor, including an independent contractor, a partner in a partnership, or are otherwise in business for yourself — which covers most gig and delivery work.

A W-2 employee and their employer each pay half of this tax automatically. When you're self-employed, there's no employer to split it with — you pay both halves yourself.

What is the self-employment tax rate? The 15.3% rate, broken down

The combined self-employment tax rate is 15.3%. That breaks into two pieces:

  • 12.4% goes to Social Security

  • 2.9% goes to Medicare

The Medicare piece applies to all of your net self-employment earnings, with no upper limit. The Social Security piece only applies up to a yearly wage base — the ceiling on earnings subject to Social Security tax. For 2026, that amount is $184,500, up from $176,100 for 2025. Most gig workers earn well below that ceiling, so in practice almost all of your self-employment earnings get hit with the full 15.3%.

You usually must pay self-employment tax if you had net earnings from self-employment of $400 or more — a low bar that most people clear within their first few months of steady gig work.

Why don't you pay the full rate on every dollar?

Here's a detail that trips people up: the 15.3% rate doesn't apply to 100% of what you made. Generally, the amount subject to self-employment tax is 92.35% of your net earnings from self-employment.

So the math works like this, in rough terms: take your net profit (what's left after you subtract your business expenses, like mileage or supplies), multiply it by 92.35%, then apply the 15.3% rate to that adjusted number. This small haircut exists because W-2 employees don't pay tax on the employer's matching share of their own paycheck, and the 92.35% adjustment is meant to level that out a little.

For example, say someone nets $30,000 in gig profit for the year (this is a hypothetical, not a real calculation for any specific person). Multiplying by 92.35% brings that down to about $27,705, and applying the 15.3% rate to that figure gives a rough sense of the self-employment tax bill — before any income tax is even added on top. This is only an illustration of how the math works, not a prediction of what any individual owes; actual amounts depend on your full tax situation and should be confirmed with a tax professional or tax software.

Can you deduct self-employment tax? You get to deduct half of it back

There's one piece of good news buried in here. When figuring your adjusted gross income, you can deduct one-half of the self-employment tax you pay. You don't have to itemize to get this — it's an automatic adjustment built into how the form works.

This deduction doesn't reduce the self-employment tax itself. It just lowers the income figure your regular income tax gets calculated on, which softens the overall hit a little.

Where is self-employment tax reported?

Self-employment tax isn't something you guess at — it's calculated on a specific form. You compute self-employment tax on Schedule SE, which attaches to your Form 1040. If you've done any gig work and filed taxes before, this is likely a form you've already seen without fully clocking what it was doing.

Schedule SE takes your net profit from your business (usually from Schedule C if you're a sole proprietor or independent contractor), runs it through the 92.35% adjustment, applies the 15.3% rate, and spits out both your total self-employment tax owed and the half-deduction you get to claim.

Why this matters for how you budget

Self-employment tax is on top of regular federal income tax — not instead of it. That's the part that catches new gig workers off guard. A paycheck from a W-2 job already has taxes withheld, so what lands in your account is mostly yours to spend. A payout from a gig app is different: nothing has been withheld, and both income tax and self-employment tax are still waiting for you down the road, which is also why many gig workers end up making quarterly estimated payments throughout the year.

That's one reason so many gig workers get in the habit of setting aside a chunk of every payout before they spend any of it, rather than waiting until tax season to figure out what they owe.

If you're trying to get ahead of a tight week while you sort out your tax savings habit, B9 offers cash advances and a cashback debit card built around how gig and hourly pay actually works — money that lands fast, without the surprises.