Professional Services Businesses for Sale in Illinois.

Whether you're looking at accounting, engineering, HR, or consulting, the firms worth buying share one quality: client relationships that belong to the team, not just the founder.

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Rejigg lists 17 professional services businesses for sale in Illinois.

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Featured Professional Services Businesses in Illinois

Showing 17 of 17 listings

Federal Engineering & Technology Consulting

It Consulting business for sale in Illinois.
Price$1M
Revenue$3.5M
SDE$299.4K

Financial Healthcare Staffing Specialists

Professional staffing agency with 88% contract revenue, 53% average markups, long-term assignments, remote operations, and decades-long financial and healthcare client relationships.
Price$750K
Revenue$2.8M
SDE$294.6K

Full-Service Commercial Print Shop

Sales Tools business for sale in Illinois.
Price$3M
Revenue$3.5M
EBITDA$700K

Specialized Product Design Firm

Product development consultancy with multi-decade client relationships, contract revenue, lean overhead, and work spanning research, engineering, and manufacturing design.
Price$290.5K
Revenue$763.2K
SDE$153.7K

Telecom Permitting & Zoning Consultancy

Telecom permit consulting firm generates over $480k earnings with 75% recurring revenue under multi-year agreements covering 25 states.
Price$2.2M
Revenue$864.4K
SDE$482.3K

Nonprofit Fundraising Strategy Consultancy

Nonprofit fundraising consultancy with retainer and project revenue, more than 300 past clients, and a referral-driven pipeline requiring little marketing spend.
Price-
Revenue$735K
EBITDA$422.5K

Trust Property Management Services

Trust property management company serves over 35 trust companies nationwide, combining recurring management fees with project revenue through a 3,500-contractor network.
Price$4M
Revenue$2.2M
SDE$317.8K

Outsourced Call Handling Solutions

Telecommunications business for sale in Illinois.
Price$5.5M
Revenue$3.8M
SDEN/A

Custom Cars

Custom vehicle upfitter earns transactional revenue from builds and parts, with established direct demand and a path into high-volume dealership distribution.
Price-
Revenue$2.5M
EBITDA$400K

Environmental Remediation Consulting Services

Other Government Services business for sale in Illinois.
Price$500K
Revenue$2.2M
SDE$143.1K

Web Development & Digital Solutions Agency

Website support firm serving universities, nonprofits, healthcare, and government customers, with SDE exceeding $300k in consecutive years and an established delivery team.
Price$750K
Revenue$797.3K
SDE$176.8K

Condo Lending Compliance Consultants

Real estate compliance firm earns recurring revenue from 20-30 lender relationships, open-ended service agreements, and scheduled renewal work.
Price$810K
Revenue$430.4K
SDE$286.2K

Quantitative Analysis Consulting Firm

Quantitative consulting firm operates near 50% margins, with book-driven inbound demand, independent analysts, and a developing subscription software product.
Price$6M
Revenue$1.1M
SDE$134.9K

Talent Acquisition / Executive Search Firm

Human Resources business for sale in Illinois.
Price-
Revenue$500K
SDE$300K

Boutique Design Build Contractors

Design-build construction company generates $45M revenue across contracting, preconstruction, construction management, and real estate advisory services, with a path to $100M.
Price-
Revenue$38.3M
SDE$1.3M

Global Document Authentication Services

Document processing service grew revenue from $104k to $226k, maintains near-50% SDE margins, and operates without a physical office.
Price$300K
Revenue$226.2K
SDE$99.9K

Site Safety & Risk Management Company

Construction safety consultancy with margins above 90%, $650k revenue, near-zero fixed overhead, and a contractor workforce that scales with project demand.
Price-
Revenue$650K
SDE$600K
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What to know

What to know about buying a professional services business in Illinois

Chicago holds most of the market: manufacturing, logistics and distribution, professional services, food production, retail and healthcare practices. Peoria and Rockford add industrial and machinery work, and the collar counties carry a large home services base. General contractor licensing is handled by municipalities, including the City of Chicago; the state licenses roofing and plumbing contractors. Illinois has a corporate income tax plus a personal property replacement tax on corporations and partnerships, and Chicago adds its own taxes on some transactions. SBA 7(a) lending is active through many banks, with the SBA district office in Chicago. Chicago, Peoria and Rockford are the active metros.

Professional Services listings in Illinois on Rejigg include accounting firms, law practices, consulting agencies, and other professional service providers. Buyers of these businesses look at repeat client relationships, an established reputation, and predictable revenue. Plan for client retention through the ownership change and professional licensing requirements.

Closed deals

Rejigg deals closed in Illinois

Across 41 closed deals on Rejigg, the median time from first pitch to close is 174 days.

See all Rejigg deal data

Due diligence

What to Look For

Practical guidance from hundreds of real acquisition conversations.

Recurring vs. Project Revenue

  • Ask the seller to break out what percentage of revenue renews automatically versus what has to be re-won each cycle.
  • Retainer clients, annual contracts, and subscription-based engagements are worth more than one-time project work because they're predictable from day one.
  • A firm where 50 percent or more of revenue is contracted and recurring is a strong starting point for your evaluation.

Who Owns the Client Relationships

  • Ask for a list of clients with their assigned team member and how long each relationship has been managed that way.
  • If every key client calls the founder when something goes wrong, that means real transition work for you and some client risk worth getting comfortable with early.
  • Senior staff who have managed client accounts independently for years are what turn a services firm into a real asset.

Credentials and Licensing

  • Ask which licenses or credentials are required for the business to operate and whether those are held by the owner or spread across the team.
  • In auditing, engineering, and land management, a firm with multiple licensed professionals beyond the founder is in a much stronger position at transition.
  • If the owner's departure would create a credentialing gap, that's worth understanding early and building into your plan.

Client Concentration

  • Ask for a revenue breakdown by client and how long each major relationship has been active.
  • Firms with five or more long-tenured clients each under 20 percent of revenue give you real resilience.
  • The length of a client relationship often matters as much as the size when you're thinking about how durable the revenue is.

Documented Processes

  • Ask whether the firm runs on documented workflows, project templates, and playbooks, or whether expertise primarily lives in people's heads.
  • Firms with structured processes retain their value through an ownership transition much more reliably than those where everything is informal.
  • Whether it's audit checklists, HR platform configurations, or engineering project templates, good documentation tells you the business can run without you recreating it from scratch.

Valuation

What Should You Expect to Pay?

2x-4x

SDE

Owner-operated, project-heavy or founder-dependent

4x-9x

EBITDA

Management team in place, strong recurring or contracted revenue

The spread across professional services categories is wide because owner-dependence and revenue predictability vary dramatically, from boutique consulting shops to self-running engineering firms with multi-year government contracts.

What drives a premium

Majority of revenue on recurring retainers, annual contracts, or software subscriptions

Licensed professionals on staff beyond the owner who can continue credentialed work post-sale

Senior team members with five-plus years of tenure independently managing client relationships

Revenue spread across ten or more clients with no single client above 20 percent of total

SBA Loan Calculator

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For buyers

Make your next conversation count

A listing starts the conversation. These tools help you check the fit, understand the financials, and decide what to ask next.

Prepare for the first owner call

Clarify what is for sale, who runs the business, and what the owner wants from a transition.

Prepare your buyer introduction

Check the numbers behind the asking price

Explore financing scenarios, debt payments, and the cash a business needs to keep operating.

Try the SBA loan calculator

Turn interest into a clear next step

Use the diligence checklist and LOI templates to organize requests and prepare a proposal.

Explore the deal templates

Find a business worth a closer look

Keep your industry and location in focus. Explore matching businesses or get new listings as they arrive.

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Professional Services Businesses in Illinois

How do I contact the owner of a business I found on Rejigg?
Create a free Rejigg account; owners, and the brokers who run some sales, only hear from buyers through the platform. Open the listing to see the full profile: city, team size, financials, what is for sale, and the reason for selling. Sign Rejigg's standard Fee & Confidentiality Agreement for that business; it is the same form for every deal. Verify your phone, then send your pitch from the listing. Replies, meetings, and documents all run through Rejigg.
Can I email Rejigg to get introduced to an owner?
No. Rejigg does not forward emails to owners or brokers, so a note to support@ or hello@ with a listing link will not reach them. Create a free account, open the listing, sign the agreement for that business, verify your phone, and send your pitch; that reaches them in a few minutes.
How does buying a business on Rejigg work?
Create a free account, set your criteria, and browse off-market businesses sourced directly by our team. When you find a match, reach out to the owner through the platform, Rejigg handles NDAs, scheduling, and document sharing so you can focus on the deal.
How much does it cost to buy a business?
Prices vary widely; most small businesses on Rejigg sell for $500K to $10M. Beyond purchase price, budget for diligence costs (attorney and accountant fees, typically $10K-$50K) and working capital reserves. Getting started on Rejigg is free.
What financing options are available?
The most common path is an SBA 7(a) loan, covering up to 90% of the purchase price with 10-year terms. Seller financing is also common, where the seller carries a note for 10-30% of the price. Our SBA loan calculator helps you estimate monthly payments.
How is Rejigg different from a broker or marketplace?
Brokers represent the owner and typically charge the owner 5–10% of the sale price. Marketplaces list whatever gets posted. Rejigg vets every listing, sources many of them directly through our own owner outreach, connects you directly with owners when they sell directly, and gives you tools to manage the process from first contact through closing.
What is due diligence and what does it involve?
Due diligence is the verification process after you and the owner agree on terms (usually in a Letter of Intent). Budget 30-60 days and $10K-$30K for professional help. A Quality of Earnings report is increasingly common for SBA-financed deals.
Can I buy a business with no money down?
Rarely. Most acquisitions require 10-20% down, whether through SBA financing, seller financing, or cash. Some creative structures can reduce the cash needed upfront, but sellers generally want to see you have skin in the game.