Focus on what you do best – running your business – and let us handle all your accounting needs. As a local leader for over 40 years, McMahon & Associates has helped a wide and diverse range of businesses maximize their profits and minimize their taxes. We have the talent, expertise, and experience to fulfill roles from bookkeeper to CFO. Here is a sampling of how we can help you achieve greater success…


To maintain the highest professional standards as defined by the American institute of Certified Public Accountants, McMahon & Associates voluntarily subjects our Firm to a peer review process every three years.  Only through the successful completion of the peer review process does our Firm get authorized to perform Audit and Attestation services.  We are proud to tell you that we have regularly passed this review with no deficiencies, and make the report public on the home page of our website.  Levels of financial reporting performed by our team:

  • Audits
  • Reviews
  • Compilations
  • Preparation Standard

Tax returns seem to get more difficult every year.  The laws are constantly changing and new forms can make filing overwhelming.  Our qualified professional staff take the time each year to continually update their knowledge on all of these changes in order to ensure our clients receive the highest level of service.  Our experienced tax professionals are available to meet and evaluate your tax situation and answer any questions you may have.  Our goal is to ensure that you fully understand your current tax position and plan accordingly for future years.

We prepare returns for:

  • Corporations (S Corporations & C Corporations)
  • Partnerships
  • Not-for-Profit Entities
  • Homeowners Associations
  • Individuals
  • Trusts and Estates
  • Gifting
  • Tax planning
  • Multi-state Tax Returns
  • Personal Property Tax Returns
Business Valuations

McMahon & Associates has the experience and in-house expertise necessary to value your business. The valuation may have significant financial consequences and should be prepared with a great deal of care and consideration. We pride ourselves in having an in-depth knowledge of small to mid-sized business entities across a wide range of industries.

Valuation services provided:

  • Buy / sell agreements
  • Divorces
  • Gifting
  • Selling a business

McMahon & Associates will happily provide payroll services structured around your small to mid-sized businesses.  We understand that every business is unique with different demands and factors that impact timely payroll processing.  Whether we handle quarterly and annual filings, or we prepare live or direct deposit checks, McMahon & Associates will ensure you are up to date with the ever complicating world of payroll.  Let us handle this task so you have more time to focus on your business.

We provide:

  • Payroll check processing
  • Garnishment submission
  • Tax payment calculations and/or electronic submissions
  • Quarterly / Annual tax filings
  • W2 / 1099 Processing
  • Health care mandate requirements
  • 1095-C compliance reporting

While McMahon & Associates will help your business stay in compliance from an assurance or tax perspective, our passion is to become a part of your financial team and assist business owners to meet their goals.  Whether your business is just starting or has been around for years, our qualified team is here to help and guide you to success.

Consulting and other professional services include:

  • Government Audit Representation
  • Business succession planning
  • Business valuations
  • Buy / sell agreements
  • Company controller assistance
  • Entity selection
  • Estate planning
  • Pension, profit-sharing and 401(k) plan analysis
  • Preparation of financing requests, budgets, covenants, etc
  • Strategic planning

Record keeping is definitely not for everyone.  McMahon & Associates has an experienced team of bookkeepers available to assist the business owners or board in maintaining the company’s books and records.   We will gladly assist you with monthly bookkeeping, bill pay, year-end adjustments, or any other services your company needs.  We will happily attend board meetings to answer any questions that may arise or present financial statements should you desire them.

Just let us know how we can help with:

  • Bill pay services
  • Bookkeeping
  • Quickbooks assistance
  • Tracking of fixed assets
  • Sales tax
  • Daily practice management services

Established in 1971, McMahon & Associates has been serving Northwest Indiana and Chicago’s South Suburbs to help them grow their business. McMahon & Associates is locally-owned and offers a unique blend of big firm services and small firm care. From advanced tax expertise, IRS representation, audits, business valuations, estate planning and succession planning to basic bookkeeping and payroll services, clients find the services they need for every stage of their business or every stage of life.

10010 Calumet Avenue Munster, IN 46321

(219) 924.1640