Detroit is one of a small number of U.S. cities that levies its own municipal income tax, and for businesses based outside Michigan, it often comes as a surprise. If your company has employees working in Detroit, even on a temporary or project basis, you may have registration, withholding, and filing obligations you haven't accounted for.
This article covers the basics of how Detroit's city income tax works, who it applies to, and what you need to do about it. It's intended as a general overview, and your specific situation may require a different approach. We encourage you to speak with a qualified tax advisor before drawing conclusions about your own obligations.
Detroit's municipal income tax is authorized under Michigan state law, which permits certain cities to levy a local income tax. Detroit's corporate rate of 2% is the highest of any city in Michigan — most other municipalities with a local income tax are capped at 1% for corporations. Full details are available on the Michigan Department of Treasury's Detroit Corporate Income Tax page.
The rate that applies to your business depends on how it's structured and where your employees live and work.
If your business operates both inside and outside of Detroit, apportionment rules determine what share of your income is subject to the city tax. The calculations can get complex depending on your business model and workforce.
Key takeaway: Detroit's 2% corporate rate is the highest of any city in Michigan. Rates vary depending on how your business is structured and where your employees live and work.
This is where many out-of-state businesses get caught off guard. Any employer "doing business" in Detroit is required to register and withhold Detroit city income tax — regardless of where that employer is based. A healthcare practice headquartered in New Jersey, a consulting firm based in Connecticut, or a contractor working on a Detroit development project can all fall within scope.
Withholding is required for two groups of employees:
For employees who split time between Detroit and other locations, withholding applies only to the proportion of wages tied to work performed in Detroit.
One nuance worth flagging: Detroit's ordinance takes a strict position on remote work. A nonresident employee who takes work home cannot count those home-based days as days worked outside Detroit. For businesses with hybrid workforces, this is a common and costly oversight.
Key takeaway: The withholding rules reach further than most businesses expect. If your employees work in Detroit at all, even part of the time, you likely have obligations even if your office is nowhere near Michigan.
Since 2017, Detroit's corporate and withholding filings are handled through the Michigan Department of Treasury — not the City of Detroit directly. Businesses unfamiliar with Michigan sometimes look for a city portal that no longer exists for these purposes.
Key forms and deadlines to know (a full list of forms is available through Michigan Treasury's City Tax portal):
A few practical notes: businesses already registered for Michigan state taxes don't need a separate registration for the Detroit corporate tax — your Federal Employer Identification Number (FEIN) is used. Monthly withholding returns must be filed even if there's no tax due for the period. Electronic filing is available through Michigan Treasury Online and is encouraged.
Key takeaway: Filings go to Michigan Treasury, not the City of Detroit. Knowing the right forms and deadlines is the foundation of compliance, and getting them wrong is a common, avoidable mistake.
A few situations that tend to create compliance gaps:
Out-of-state businesses with Detroit operations. The most common blind spot. If your employees are performing services within city limits — at a client site, on a job, or in a permanent facility — you likely have withholding and filing obligations. This often goes unaddressed simply because no one flagged it when the work began.
Multi-entity structures. Partnerships must apply the correct rate to each partner based on residency and entity type. Getting this wrong affects both the partnership's filing and each partner's individual tax liability.
Prior non-compliance. If your business has operated in Detroit without registering for withholding or filing a corporate return, it's worth addressing that exposure proactively — before it surfaces through enforcement. The penalties for late or missed filings can accumulate quickly.
Key takeaway: The businesses most at risk are often those that don't realize they have an obligation in the first place. A quick review of your situation before issues arise is far easier than resolving them after the fact.
Detroit's city income tax is more complex than it looks — particularly for businesses operating across state lines or managing employees who split time between locations. The rules around withholding, remote work, and multi-entity structures require careful attention, and the consequences of getting it wrong aren't trivial.
At Revonary, we work with businesses navigating multi-jurisdictional tax obligations, and can help you understand your exposure, get registered if needed, and stay compliant going forward. If you're also thinking about broader tax planning strategies for your business or want to explore how to reduce your overall tax liability as a high earner, our tax team can help with that too. Whether you're new to operating in Detroit or concerned about gaps in your current setup, we're here to help.
Contact us today to speak with one of our advisors.