Michigan Treasury Phone Numbers: Income Tax, Business, Collections

The main phone number for the Michigan Department of Treasury is 517-335-7508, but most tax questions are handled by a specific division rather than the general line.¹ Individual income tax calls go to 517-636-4486, business tax questions to 517-636-6925, and collections to 517-636-5265. Live representatives answer Monday through Friday, 8:00 a.m. to 4:30 p.m.

Individual Income Tax

Call 517-636-4486 for questions about your personal Michigan return, your refund, filing requirements, or the homestead property tax credit.² It’s also the number to use if you’ve received a notice about your return, if you need forms (press option 2), or if you’re reporting identity theft tied to a fraudulent Michigan filing.¹

An automated system handles common questions around the clock. Live staff take calls Monday through Friday, 8:00 a.m. to 4:30 p.m.² Expect longer waits during tax season, roughly January through mid-April. Mid-morning Tuesday or Wednesday is usually quieter than Monday or the days just before a filing deadline.

Business Tax

One number, 517-636-6925, covers most business tax matters: sales tax, use tax, withholding, corporate income tax, and business tax registration.¹ Use it whether you’re setting up a new account, changing your filing frequency, or working out how Michigan sales tax applies to what you sell.

Several business-related taxes have their own lines:

Motor fuel tax: 517-636-4600
Cigarette and tobacco tax: 517-636-4630
Tax compliance and audits: 517-636-4200
Tax clearance letters: 517-636-5260

City Income Tax

Michigan is one of the few states where certain cities impose their own income tax, and the state Treasury administers collection for most of them. If you live or work in Detroit, Grand Rapids, Lansing, or another city with a local income tax, call 517-636-5829 for questions about local withholding, credits, or filing.¹ The local returns follow different rules and sometimes different rates than the state return, which is why they have a separate line.

Collections and Past-Due Balances

If you owe back taxes or received a collections letter, the number depends on whether the debt is personal or business:

Individual collections: 517-636-5265
Business collections: 517-827-3227
Garnishments and levies: 517-636-5333

All three connect to the Treasury’s Collection Services Bureau.³ If you can’t pay in full, calling 517-636-5265 is one of three ways to request an installment agreement; the other two are the online Collections eService portal and the mailed installment agreement form.⁴ Don’t ignore the letters. Unpaid state taxes become a lien against your property.⁵

Other Specialized Numbers

A handful of issues have their own dedicated lines that aren’t obvious from the main menu:

Unclaimed property (forgotten bank accounts, uncashed checks, insurance proceeds): 517-636-5320
Taxpayer Advocate: 517-636-4759
Tax fraud reporting: 517-636-4157
Principal residence exemption: 517-335-7487
TTY through the Michigan Relay Center: 711

The Taxpayer Advocate is worth knowing about. Call 517-636-4759 if you’re facing a hardship because of a Treasury action, if your issue has been bouncing between departments without resolution, or if you believe the department has made an error it won’t correct.¹ The office works independently from the divisions that handle daily processing.

One boundary worth flagging: if you want to appeal a final assessment, that goes to the Michigan Tax Tribunal, a body separate from the Treasury. The Tribunal has its own number, 517-335-9760, and only accepts appeal petitions in writing.⁶

What to Have Ready Before You Call

Representatives verify identity before discussing any account details. Save yourself a second call by pulling these together first:

Your Social Security number, or Federal Employer Identification Number for business calls
A copy of the return in question, with tax year, filing status, and amounts reported
Any notice or letter you received, especially the notice number printed on it, which is how the representative pulls up your case
Payment records if you’re calling about a balance or collections

For the automated refund line, you’ll need your Social Security number and the exact refund amount from your return.

When the Website Is Faster

Many tasks that used to require a call are now handled online. Michigan Treasury Online (MTO) at mto.treasury.michigan.gov is the main portal for businesses to file returns, make payments, and manage accounts.⁷ Individual taxpayers can check refund status, view their account, and access correspondence through Michigan Treasury eServices.⁸ The Collections eService portal handles payment plans using the reference number from your collections letter.⁴

Quick Reference

General Treasury information: 517-335-7508
Individual income tax: 517-636-4486
Business taxes (sales, use, withholding, CIT): 517-636-6925
City income tax: 517-636-5829
Collections, individuals: 517-636-5265
Collections, businesses: 517-827-3227
Garnishments and levies: 517-636-5333
Motor fuel tax: 517-636-4600
Cigarette and tobacco tax: 517-636-4630
Tax compliance and audits: 517-636-4200
Tax clearance letters: 517-636-5260
Unclaimed property: 517-636-5320
Taxpayer Advocate: 517-636-4759
Tax fraud reporting: 517-636-4157
Principal residence exemption: 517-335-7487
Michigan Tax Tribunal: 517-335-9760
TTY through Michigan Relay Center: 711

All numbers appear on the Treasury’s official contact page at michigan.gov/treasury/contact-us.¹

1
Michigan Department of Treasury. Contact Us
2
Michigan Department of Treasury. Contact Us – Individual Income Tax
3
Michigan Department of Treasury. Contact Collections
4
Michigan Department of Treasury. Installment Agreement
5
Michigan Legislature. Michigan Compiled Laws 205.29 – Taxes, Interest, and Penalties as Lien
6
Michigan.gov. Contact the Tribunal
7
Michigan Treasury Online. Michigan Treasury Online
8
Michigan Department of Treasury. Where’s My Refund?