What This Guide Covers
Detroit freelancers face a three-layer tax obligation that W2 employees never deal with: federal self-employment tax, Michigan state income tax, and Detroit city income tax for residents. This guide explains all three, how they interact, and what to expect when you file.
Layer 1: Federal Self-Employment Tax
Self-employment tax (SE tax) covers Social Security and Medicare contributions. W2 employees split these 50/50 with their employer, each paying 7.65%. Self-employed workers pay the full 15.3% rate on net SE income. The breakdown is 12.4% for Social Security (on the first $176,100 of net SE income in 2026) and 2.9% for Medicare with no income cap.
The SE tax deduction: You can deduct half of your SE tax from your gross income when calculating your AGI. This reduces your federal income tax but not the SE tax itself. It is calculated on Schedule SE and transferred to Form 1040.
Layer 2: Michigan State Income Tax
Michigan has a flat income tax rate of 4.25% on all taxable income in 2026. For self-employed Michigan residents, this applies to your net self-employment income after federal deductions. File Form MI-1040 for your Michigan return. If you expect to owe $500 or more, Michigan requires quarterly estimated payments using Form MI-1040ES.
Layer 3: Detroit City Income Tax
Detroit charges a city income tax of 2.4% for residents and 1.2% for non-residents who earn income in the city. If you live in Detroit, you owe the 2.4% rate on your total taxable income regardless of where you work. File Form D-1040 by April 15 for the previous year. Detroit does not have a formal quarterly estimated payment system — the city tax is typically paid with the annual return.
Example: $60,000 Net SE Income in Detroit
SE tax: $60,000 x 15.3% = $9,180
SE tax deduction: $9,180 / 2 = $4,590 reduction to AGI
Adjusted income for income taxes: approximately $55,410
Federal income tax (22% bracket approximately): approximately $6,500
Michigan income tax: $55,410 x 4.25% = approximately $2,355
Detroit city tax: $55,410 x 2.4% = approximately $1,330
Total tax obligation: approximately $19,365 on $60,000 gross income
This example does not account for deductions, retirement contributions, or health insurance premiums which can significantly reduce the obligation. A CPA familiar with self-employment can identify all applicable deductions.
Key Deductions That Reduce Your Tax Bill
- Home office deduction if you have a dedicated workspace
- Business equipment, software, and technology
- Self-employed health insurance premiums (100% deductible from AGI)
- Solo 401k or SEP IRA contributions (fully deductible)
- Professional development, subscriptions, and business meals (50%)
- SE tax deduction (half of SE tax from AGI)
For the full quarterly payment schedule and how to calculate what you owe each quarter, see FHR's guide: Quarterly Taxes: First-Timer Guide. For the detailed 2026 tax deep-dive, see FHR's blog post: Self-Employment Taxes for Detroit Freelancers.
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