How is side hustle income taxed?

Side hustle income is taxed as self-employment income. You owe both income tax (federal + state) and self-employment tax (15.3% for Social Security and Medicare). The good news: you can deduct business expenses, half of self-employment tax, and contributions to a SEP IRA or Solo 401k.

Do I need to pay quarterly estimated taxes?

If you expect to owe $1,000 or more in taxes on your side hustle, yes. The IRS requires quarterly estimated payments if your withholding doesn't cover your total tax liability. Form 1040-ES is used to calculate and pay quarterly estimates. Failure to pay can result in underpayment penalties.

What expenses can I deduct as a freelancer?

Common deductions include: home office (simplified method: $5/sq ft up to 300 sq ft), equipment and supplies, software subscriptions, internet and phone (business portion), marketing and advertising, professional development, travel for client meetings, health insurance premiums, and retirement contributions. Track everything with [QuickBooks](https://quickbooks.intuit.com) or [FreshBooks](https://freshbooks.com).

Should I form an LLC for my side hustle?

A single-member LLC provides liability protection and credibility but doesn't change your tax situation (you still file Schedule C). Consider an S-Corp election when your net side income exceeds $60K/year; it can reduce self-employment tax by allowing you to take part of your income as distributions (not subject to SE tax). LLC formation costs $50-800 depending on state.

What is the self-employment tax rate?

The self-employment tax rate is 15.3% (12.4% for Social Security + 2.9% for Medicare). However, you can deduct half of this amount (7.65%) as an adjustment to income on your Form 1040. The Social Security portion only applies to the first $176,100 of combined income (2026 limit).

Do I need a separate bank account for my side hustle?

While not legally required for a sole proprietorship, a separate business bank account is strongly recommended. It simplifies bookkeeping, shows professionalism if audited, and makes tax preparation significantly easier. Many free options exist like [Lili](https://lili.com) or [Mercury](https://mercury.com) for online businesses.

What happens if I don't report side hustle income?

The IRS has increasingly sophisticated methods to detect unreported income, including matching 1099 forms, analyzing bank deposits, and using AI to identify discrepancies. Penalties include: 20% accuracy-related penalty, failure-to-file penalty (5%/month up to 25%), failure-to-pay penalty (0.5%/month up to 25%), and potential criminal charges for tax evasion in extreme cases.

How do state taxes work for side hustle income?

You owe state income tax in your state of residence. If you provide in-person services in other states, you may owe tax there too. States without income tax (TX, FL, NV, WA, etc.) are ideal for side hustlers. State tax rates range from 0% to 13.3% (CA). Some states have specific rules for digital products and services.

副業収入税額計算機

副業収入の税額を見積もります。事業経費、自営業税、連邦税と州税を含みます。