Michigan Subcontractor Insurance Requirements for General Contractors

TL;DR: Michigan requires workers' compensation coverage for most employers with one or more employees who work 35 or more hours per week for 13 or more weeks per year — a lower threshold than many GCs realize. Collect a valid COI, W-9, and signed lien waiver before any sub sets foot on your jobsite.

If you're a general contractor working in Michigan, the compliance burden sits squarely on your shoulders. When a subcontractor doesn't have proper insurance, doesn't file a W-9, or walks off your project without signing a lien waiver, you absorb the hit — not them. Michigan has some of the most creditor-friendly construction lien laws in the country, which makes document collection less optional than ever.

This guide covers everything a Michigan GC needs to know: licensing requirements, insurance minimums, workers' comp rules, lien waiver law, and a practical compliance checklist.

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Michigan Contractor Licensing Requirements

Michigan separates residential and commercial licensing — and the rules are different enough that getting them confused can cost you your license.

Residential Contractors

The Michigan Department of Licensing and Regulatory Affairs (LARA) requires licensure for any contractor performing residential construction, improvement, repair, or alteration on 1–2 family dwellings. There are two primary license types:

• Residential Builder (RB): Full construction authority on single- or two-family residential structures.
• Maintenance and Alteration Contractor (MCA): Narrower scope — renovation, remodeling, repair, or improvement to existing residential structures. Issued in specific trades (electrical, mechanical, plumbing, etc.).

Key requirements for a Residential Builder license:

• Pass a written exam through a LARA-approved testing vendor
• Carry a minimum $20,000 surety bond
• Submit proof of general liability insurance (minimum $250,000 per occurrence, $500,000 aggregate for residential work)
• Pay the license fee (currently around $180 for a 3-year license)

Verify current licensing information at michigan.gov/lara.

Commercial Contractors

There is no statewide commercial contractor license in Michigan. However:

• Many local jurisdictions (Detroit, Grand Rapids, Lansing) require local business licenses or permits
• Specialty trades (electrical, mechanical, plumbing) are licensed separately through LARA
• Federal projects may require additional bonding and certification

If you bid on commercial work, check the municipality's requirements — they vary significantly.

Subcontractor Licensing Verification

Before you hire a sub, confirm they hold the correct Michigan license for the scope of work. You can verify residential builder and MCA licenses at the LARA license search portal. For specialty trades, use the Electrical, Mechanical, and Plumbing licensing pages within LARA.

Hiring an unlicensed sub puts your own license at risk and can void your insurance coverage on claims arising from that sub's work.

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General Liability Insurance Requirements

Michigan doesn't have a single statewide minimum GL requirement for all construction work. Instead, minimums are set by:

• Your license type (residential builders need $250K/$500K minimum)
• Project owner requirements (GCs on commercial work routinely require $1M/$2M)
• Contract terms (check owner contracts for specific endorsement requirements)

What GCs Should Require from Subs

As a practical matter, require your subs to carry at least $1,000,000 per occurrence / $2,000,000 aggregate for commercial or multi-family work. For residential subs, many GCs set minimums at $500,000/$1,000,000, though going to $1M/$2M is cheap protection.

Beyond the limits, verify these details on every COI:

• Policy effective and expiration dates — don't let a COI expire mid-project
• Additional insured status — you and the owner should be listed
• Primary and non-contributory language — the sub's policy pays before yours
• Waiver of subrogation — the sub's insurer can't come after you after a claim

A COI is a snapshot, not a guarantee. It reflects coverage as of the date issued, not necessarily coverage today. Track expiration dates in a system (even a spreadsheet) so you know before they lapse — PaperBoss automates this with real-time expiration alerts.

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Michigan Workers' Compensation Requirements

Michigan's workers' comp rules are stricter than many GCs assume, particularly around the coverage threshold.

Who Must Carry WC in Michigan

Under the Michigan Workers' Disability Compensation Act, you must carry workers' compensation insurance if your business:

• Has 3 or more employees at any one time, OR
• Regularly employs 1 or more employees for 35 or more hours per week for 13 or more consecutive weeks

That second prong catches a lot of small GCs who thought they were under the threshold. If a part-time laborer works enough hours during peak season, you may be legally required to carry WC.

The Michigan Compensation Appellate Commission and the Workers' Disability Compensation Agency (WDCA) administer the program. Michigan is not a monopolistic state — you purchase coverage from a private insurer of your choice, or through the Michigan Catastrophic Claims Association for catastrophic injury cases.

WC Exemptions for Sole Proprietors and Owners

Sole proprietors and partners are automatically exempt from WC in Michigan — they are not employees. LLC members are generally treated the same way for exemption purposes, but the specifics depend on the LLC operating agreement and how many members are involved.

If you're a sole proprietor GC hiring sole-proprietor subs, here's the trap: if one of those subs is later deemed to be your employee (common law employee test), you could be on the hook for their WC coverage. Michigan courts look at factors like:

• Who controls how the work is done
• Who supplies tools and equipment
• Whether the sub works exclusively for you

Get W-9s from every sub and document the independent contractor relationship carefully.

Collecting WC Proof from Subs

Require a WC COI from every sub with employees. For sole proprietors claiming exemption, get a signed written statement that they have no employees and are operating as a sole proprietor or exempt LLC member. Some GCs use a short independent contractor certification letter — have your attorney draft one specific to Michigan.

If a sub refuses to provide proof, don't let them on site. Michigan's construction industry is highly litigated; the paper trail matters.

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Michigan Lien Waiver Law

Michigan's Construction Lien Act (MCL 570.1101 et seq.) is one of the most contractor-friendly lien statutes in the country — which is great for your subs, and a significant exposure for you as the GC.

How Michigan Construction Liens Work

In Michigan, first-tier subcontractors and suppliers can file a lien against the property owner's real estate — even if you, the GC, haven't been paid yet. Owners can protect themselves by making sure you get lien waivers before releasing payment. If you don't collect them, the owner may rightfully withhold payment from you until the risk clears.

Key timeline facts:

• Subcontractors and suppliers must serve a Notice of Furnishing within 20 days of first providing labor or materials to preserve lien rights
• Liens must be filed within 90 days of the last date of furnishing
• Enforcement of a lien must begin within 1 year of filing

Types of Michigan Lien Waivers

Michigan recognizes two lien waiver types that matter in practice:

Conditional Lien Waiver: The sub waives their lien rights only if the check clears. Use these when handing a check to a sub at the time of payment. They're safer for both parties.

Unconditional Lien Waiver: The sub waives lien rights regardless of whether payment is received. Only collect these after you've confirmed payment has been received and cleared.

Michigan does not mandate specific statutory waiver forms (unlike California, for example). However, the language matters — courts interpret ambiguous waivers narrowly in favor of the lienor. Use a waiver form reviewed by a Michigan construction attorney, or use standard AIA lien waiver forms which are widely accepted.

GC's Practical Lien Waiver Workflow

1. Before drawing a check for a sub, have them sign a conditional lien waiver for that draw amount
2. After payment clears (typically 5–10 business days), collect an unconditional lien waiver for that draw
3. Before your final payment request to the owner, have all subs sign an unconditional final lien waiver
4. Keep copies of all waivers in the project file for at least 7 years

Missing a lien waiver on a single tier-2 sub can hold up your final payment. Build the workflow into your draw process so it's not an afterthought.

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W-9 Collection and 1099-NEC Filing in Michigan

Michigan follows federal rules for 1099-NEC filing — no separate state filing requirement is layered on top.

Federal 1099-NEC Requirements

• Collect a W-9 from every subcontractor before first payment
• Issue a 1099-NEC to any unincorporated sub (sole prop, LLC, partnership) paid $600 or more during the calendar year
• Corporations and S-corps are generally exempt — but you still need the W-9 to confirm entity type
• Deadline: 1099-NECs must be filed with the IRS and delivered to the recipient by January 31

The IRS penalty for a missing or late 1099 is $310 per form (for returns more than 30 days late). If the IRS determines intentional disregard, the penalty jumps to $630 per form with no cap. Across a roster of 15–20 subs, that adds up fast.

Michigan Income Tax Withholding

Michigan has a flat state income tax rate of 4.25%. If a subcontractor is a Michigan resident working in Michigan, they're handling their own estimated tax payments — this isn't a withholding obligation on you. However, if you perform backup withholding at the federal rate (24%) because a sub failed to provide a correct W-9, you'll also want to consult a Michigan CPA about state backup withholding obligations.

The practical takeaway: get the W-9 upfront. One missing W-9 snowballs into a 1099 problem which snowballs into a backup withholding problem.

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State-Specific Risks Michigan GCs Should Know

The "90-Day Rule" Trap

Michigan's 90-day lien filing window runs from the sub's last day of furnishing — not from when their invoice is due or when your draw is paid. Subs who finished work 85 days ago can still file a lien tomorrow. If you haven't collected lien waivers in sequence with each payment, a lapsed sub can hold a lien over a completed project.

No-Fault vs. Fault in WC Claims

Michigan has a no-fault WC system for most injuries — subs don't need to prove the GC was negligent to collect benefits. This means your exposure is primarily driven by whether the sub is properly covered, not whether you did anything wrong.

Detroit and Grand Rapids Local Permits

Detroit has its own Building and Safety Engineering and Environmental Department with specific permit and inspection requirements. Grand Rapids issues its own contractor registrations. If you're working in either city, verify local requirements before breaking ground — a state license doesn't automatically satisfy the city.

Residential vs. Commercial Wage Theft Liability

Michigan's Wage Payment Act gives employees (and sometimes misclassified subs) the right to pursue back wages from the general contractor if the direct employer (your sub) doesn't pay. On public projects, there are additional prevailing wage requirements. Know who's on your site and make sure they're properly classified.

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Michigan Subcontractor Compliance Checklist

Use this before mobilizing any new sub on a Michigan project:

Before First Payment:

• Verified Michigan contractor license is active (LARA lookup)
• Collected current COI showing GL ($1M/$2M minimum) with expiration date logged
• Confirmed you and the owner are listed as additional insureds
• Verified "primary and non-contributory" and "waiver of subrogation" language
• Confirmed WC coverage is in force (or collected written sole-proprietor exemption)
• Collected a signed W-9 with correct legal name and EIN/SSN
• Verified sub served a Notice of Furnishing within 20 days of start

At Each Progress Payment:

• Collected a conditional lien waiver for this draw amount before releasing check
• After payment clears, collected unconditional lien waiver for prior draw

At Project Close:

• Collected unconditional final lien waiver from all subs and suppliers
• Confirmed no open Notices of Furnishing outstanding
• Issued 1099-NECs to qualifying unincorporated subs by January 31

Annually:

• Audited COI expiration dates for all active subs
• Renewed W-9s for subs with name or address changes
• Verified license renewals for all regular subs (LARA)

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How PaperBoss Helps Michigan GCs

Managing a compliance stack across 15 active subs in a spreadsheet is where Michigan GC offices lose control. Lien waiver tracking, COI expiration alerts, and W-9 collection fall through the cracks — usually at the worst possible time.

PaperBoss automates the tracking layer: it notifies you when a sub's COI is expiring, flags missing lien waivers before draw releases, and keeps your W-9 files organized and searchable. For a small GC office juggling multiple active projects, that's the difference between a clean audit and a $9,755 workers' comp adjustment surprise.

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Frequently Asked Questions

Does Michigan require a general contractor license?

Michigan requires a Residential Builder license for contractors working on 1–2 family residences, administered by LARA. There is no statewide general contractor license for commercial work, but local municipalities (especially Detroit and Grand Rapids) may have their own registration requirements. Specialty trades require separate LARA licenses regardless of project type.

How many employees triggers workers' comp in Michigan?

Michigan requires workers' compensation if you have 3 or more employees at any point, or if you have at least 1 employee working 35+ hours per week for 13 or more consecutive weeks. Sole proprietors and partners are exempt. Don't assume your sub crew is small enough to skip coverage — run the math at the start of every project season.

Are lien waivers legally binding in Michigan?

Yes. Michigan courts enforce properly drafted lien waivers under the Construction Lien Act (MCL 570.1101 et seq.). Michigan does not prescribe a mandatory statutory form, but the language must clearly identify the waived lien rights, the project, and the payment amount. Ambiguous waivers are interpreted against the party claiming the waiver. Use forms reviewed by a Michigan construction attorney.

Can a sub's employees file a lien if the sub doesn't pay them?

In Michigan, employees generally cannot file a mechanic's lien directly — lien rights belong to the contractor or supplier. However, Michigan's Wage Payment Act gives employees claims against the direct employer, and on some projects the GC can have secondary liability. The more immediate exposure is that laborers hired by a sub-sub who hasn't been paid may trigger a claim up the chain that eventually affects your project.

What's the penalty for not collecting a W-9 from a subcontractor in Michigan?

The federal penalty for filing a 1099-NEC without a valid TIN (because you didn't collect a W-9) is $310 per form for filings more than 30 days late, and up to $630 per form for intentional disregard — with no maximum cap. Michigan doesn't add a separate state penalty on top, but the IRS exposure alone is significant across a roster of subs.

Do I need to collect a Notice of Furnishing from my subs?

The Notice of Furnishing is filed by the subcontractor (or supplier) to the owner and GC — it's not something you collect, but something you should expect to receive. If you receive a Notice of Furnishing from a tier-2 sub or supplier you didn't hire directly, treat it as a signal to track that party's payment and collect a lien waiver from them at project completion.

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The information in this guide is for general educational purposes. Michigan construction law and licensing requirements change — consult a licensed Michigan attorney for advice specific to your projects.