A consulting firm gives an organization outside expertise for a defined problem. Expect the consultants to gather information, interview staff, analyze data, recommend solutions in a written report or presentation and, if agreed, help implement them. Scope, deliverables and the fee model (hourly, fixed project fee, retainer or value-based) should be set in writing first.
Key Takeaways
- A consulting firm sells expertise and an outside view on a specific problem, without the cost of a permanent hire.
- According to the US Bureau of Labor Statistics (BLS), management analysts gather information, interview personnel, analyze data, develop solutions and present recommendations to management.
- Consulting firms commonly charge by the hour, a fixed project fee, a monthly retainer or a value-based fee, so agree the model and scope before work starts.
- Certification is not required in the US, though the Institute of Management Consultants USA offers the Certified Management Consultant (CMC) credential.
- Small businesses can get free advice from SCORE mentors and free to low-cost help from SBA Women’s Business Centers.
Frequently in business, you’ll have to bring in professionals from outside of your company for help. Many businesses work with consulting firms to help them achieve their goals. If you’ve never worked with a consulting firm before, you might be wondering what it is exactly that they do.
Things You Can Expect From a Consulting Firm
A consulting firm is a business that is made up of industry-specific experts who can offer their clients professional advice, guidance, and actionable solutions to business problems. While consulting firms often work with businesses, there are some that work with individuals to provide solutions that can be applied to their personal lives.
Before you hire a consulting firm, you might have a lot of questions regarding what exactly they’ll do for you. If you’re considering working with a consulting firm, here are a few things you can expect from them.
Expert Knowledge in a Certain Field
One thing you can expect from any good consulting firm is access to a team of experts who excel in a certain field. Even large companies with diversely talented teams will have issues that can’t always be solved with the staff they already have.
Your company may already employ specialists in the field, but they may still need outside assistance with a particular problem.
A consulting firm can work with you to find solutions to problems you are unable to solve on your own. These experts provide valuable guidance for you or your company without requiring you to hire a full-time employee.
Consulting firms can help and have a presence in virtually every industry. There are firms that have a broad spectrum and have “business” clients and others that are specific to trades and practices such as finance, healthcare, advertising, engineering, architecture, technology, or economic consulting.
Of course, each of these types of consulting firms will have very different services to offer to their clients. Because of this, what exactly you can expect from the consulting firm you choose is going to vary depending on the field they’re in.
Research to Help Your Company
A business or individual seeking assistance from a consulting firm wants to obtain information and have it compiled for them. The information may be organized in surveys, feasibility studies, market surveys, or analyses of the competitive structure of the industry or business.
A company may want the consultant’s expertise and up-to-date information. The company may be unable to spare the time and resources to compile that data internally, so hiring a firm is the easier route.
A consultant needs to know what they are researching the information for so they can supply their client with useful findings. Consultants also need to know what information is relevant to the company and what information the company already has on hand.
For example, engineering consultants are experts in planning, designing, and helping construct different projects and infrastructure for clients. They can help make a project greener and safer for a company.
A financial advisor usually provides personalized financial planning for individuals rather than for a whole company, while a financial consultant working with businesses can provide insight on financial risk and on customer and supply chain operations.
Help With Problem Solving
Consulting firms are hired to solve problems such as whether or not to change their marketing strategy or to acquire or divest a line of business.
Consultants are required to figure out which problem needs solving and how to solve it. They go over past attempts and solutions, figure out how to apply the solution, and how to have the company and its employees accept the solution. Consultants also help implement their solutions.
For example, a company might hire a human resources (HR) consulting firm to help determine appropriate compensation for its employees.
The HR consultants would recommend pay figures based on the company’s situation and their experience from past projects, then help implement the findings and explain the reasoning behind the pay structure.
Consulting firms serve almost every industry because organizations of every kind face problems they cannot solve with internal resources alone. If a company is confronted with an issue that cannot be solved in house, a consulting firm could be the answer.
What Does a Consulting Firm Actually Do?
A consulting firm diagnoses a problem, recommends a solution and, when hired to, helps put it into practice. Wikipedia defines management consulting as the practice of providing consulting services to organizations to improve their performance or help them achieve their objectives.
The US Bureau of Labor Statistics (BLS) lists the core duties of management analysts, the occupation that covers most business consultants:
- Gather and organize information about the problem to be solved.
- Interview personnel and conduct onsite observations.
- Analyze financial and other data.
- Develop solutions or alternative practices.
- Recommend new systems, procedures or organizational changes.
- Present recommendations to management in presentations or written reports.
Typical consulting services include strategy development, process analysis, organizational change management, technology implementation and operational improvement, according to Wikipedia’s overview of the field.
What Happens During a Consulting Engagement, Step by Step?
A consulting engagement usually moves from scoping to diagnosis to recommendations and, where agreed, implementation. The exact stages vary by firm, but a client can expect these steps:
- Initial conversation: you describe the problem, the goal and any deadline.
- Proposal and scope: the firm sets out the work, deliverables, timeline, team and fee model in writing.
- Contract: both sides sign an agreement covering scope, fees, confidentiality and ownership of the work.
- Data gathering: consultants request documents and data, interview staff and observe operations.
- Analysis: the team analyzes the data and tests possible solutions.
- Recommendations: findings are delivered in a report or presentation to management.
- Implementation support: if included in the scope, the consultants help roll out the changes and train staff.
- Review: the client checks the results against the goals agreed at the start.
Common Types of Consulting Firms
Consulting firms range from global strategy houses to one-person specialist practices. The table below summarizes the main types.
| Type of firm | Typical focus | Examples |
|---|---|---|
| Strategy (management) consulting | Corporate strategy, growth, mergers and operations | McKinsey & Company, Boston Consulting Group, Bain & Company (the “Big Three”, or MBB) |
| Big Four professional services | Consulting alongside audit, tax and advisory work | Deloitte, PwC, EY, KPMG |
| Technology and IT consulting | Software, systems and digital implementation | Specialist and generalist firms of every size |
| Human resources consulting | Compensation, hiring, training and organization design | HR advisory firms and independent consultants |
| Engineering consulting | Planning, design and construction of projects and infrastructure | Engineering and construction consultancies |
| Marketing and digital consulting | Brand, advertising, SEO and customer strategy | Agencies and independent specialists |
Specialist practices also exist for narrower needs, such as AI consulting for business strategy, leadership development consulting and consultancy services in construction.
How Do Consulting Firms Charge?
Consulting firms usually charge in one of a handful of ways, and the fee model shapes the incentives on both sides. The common models are:
- Hourly or daily rate: you pay for the time actually worked.
- Fixed project fee: one price for a defined scope and agreed deliverables.
- Retainer: a recurring monthly fee for ongoing access to the firm.
- Value-based fee: the price reflects the economic value the work is expected to create, not the hours spent.
- Hybrid: a base fee plus extra payments tied to measurable outcomes or milestones.
Rates vary widely by firm size, field, location and seniority, so compare written quotes for the same scope rather than relying on published averages. Ask what happens, and what it costs, if the scope changes mid-project.
The Consulting Profession by the Numbers
According to the BLS Occupational Outlook Handbook, as of October 2026 the latest figures for US management analysts are:
| Measure | Figure |
|---|---|
| Median annual pay (May 2025) | $101,860 |
| Number of jobs (2025) | 1,077,100 |
| Projected job growth (2025-35) | 10%, much faster than average |
| Typical entry-level education | Bachelor’s degree |
| Share self-employed | 14% |
| Largest employer | Professional, scientific and technical services (33%), followed by government (18%) |
The BLS also notes that management analysts often travel to client sites and frequently work long hours under tight deadlines.
How to Choose the Right Consulting Firm
The right consulting firm has proven experience with problems like yours and agrees to clear, measurable deliverables. Use this checklist before signing:
- Relevant experience: ask for examples of similar projects in your industry and speak to past clients.
- Who does the work: confirm which people will be on your project, not just who attends the sales meeting.
- Written scope: insist on defined deliverables, a timeline and a fee model in the contract.
- Implementation plan: critics of consulting, including the scholar Chris Argyris, have argued that advice can contain gaps and inconsistencies that prevent good outcomes, so ask how the firm will help you act on its recommendations.
- Credentials: certification is not required, but some consultants hold the Certified Management Consultant (CMC) credential from the Institute of Management Consultants USA.
- Confidentiality: check how the firm protects your data and who owns the final work.
For narrow or ongoing tasks, a specialist may be a better fit than a full consulting firm, for example when you decide whether to outsource your SEO or hire a virtual assistant for routine work.
Free and Low-Cost Alternatives for Small Businesses
Small businesses in the US can get expert advice without paying consulting fees through the Small Business Administration (SBA) resource partner network:
- SCORE: mentors offer advice at no cost on topics such as financing, human resources and business planning, plus webinars and workshops.
- Small Business Development Centers (SBDCs): individualized business advising and technical assistance on capital, business planning, financial management, marketing and exporting.
- Women’s Business Centers (WBCs): free to low-cost counseling and training for women starting and growing businesses.
- Veterans Business Outreach Centers (VBOCs): workshops, training, counseling and mentorship, including business plan development.
These programs can help a small business define its problem clearly first, which can make any later consulting engagement more focused.
Frequently Asked Questions
What is the main purpose of a consulting firm?
The main purpose of a consulting firm is to help an organization improve its performance or reach a goal by supplying expertise and an outside perspective it lacks internally. Consultants analyze the problem, recommend solutions and often help implement them.
What is the difference between a consultant and an employee?
A consultant is hired for a defined project or period and brings specialist knowledge, while an employee is a permanent part of the staff. Hiring a consulting firm gives access to expertise without adding a full-time position.
How long does a consulting project take?
The length of a consulting project depends on its scope: a focused review is far shorter than a company-wide transformation. The proposal and contract should state the timeline and deliverables before work begins.
Do consultants need a license or certification?
Management analysts in the US are not required to hold a certification, according to the BLS. Some earn the Certified Management Consultant (CMC) credential from the Institute of Management Consultants USA. Consultants in regulated fields such as engineering or accounting may need the licenses those professions require.
What are the Big Three consulting firms?
The Big Three management consulting firms, often called MBB, are McKinsey & Company, Boston Consulting Group and Bain & Company. The Big Four accounting firms, Deloitte, PwC, EY and KPMG, also run large consulting practices.
