CPA in DuPage County: A Trusted, Proven Partner

At Dugan + Loptka CPAs, we believe that accounting is about more than just the numbers. It’s about accounting for what matters. And what matters to our clients today is feeling confident about the present and the future of their business. It’s about turning confusion into clarity, so they can make decisions with confidence.

D+L is one of the top CPA firms in DuPage County, Illinois. Since 1974, our firm has served more than 5,000 mid-sized businesses and nonprofit organizations. Today, we provide a complete range of financial management solutions, from tax preparation to auditing, business advisory and much more.

Our approach is what makes us different. We work directly with management teams to leverage data, maximize tax-savings strategies, and navigate complex business situations. We are true partners, helping our clients achieve their financial goals and focus on what really matters.

Industry Specialists: CPAs who Understand Your Business

The best business decisions come from a place of genuine understanding.

At D+L, our team includes specialists with years of experience in the industries we serve. Every day, we leverage our specialized industry knowledge to deliver sophisticated solutions, overcome nuanced challenges, and help our clients gain a competitive advantage.

When you partner with D+L, you are not only partnering with knowledgeable CPAs. You are partnering with a team that genuinely understands the challenges you face and has worked with many other businesses in your industry. We know where you’re coming from, and we know how to get your business where it needs to go.

Some of our key sectors include:

  • Manufacturing
  • Scientific, Technical and Professional Services
  • Health Care and Social Assistance
  • Educational Services
  • Retail Trade

A Full Range of Accounting Solutions, Provided by a Team You Trust

From financial planning and tax services to advisory services and more, we provide a full range of financial management solutions to help your business succeed. We understand that every business has unique needs and challenges, and we curate our services just for you.

Our services include tax preparation services & compliance, tax return preparation, auditing, reviews and compilations and accounting and business advisory, as well as specialized services. Our CPA’s can also help your business navigate mergers and acquisitions and other key change moments.

In addition to our standard services, we offer a robust range of outsourced accounting solutions. Outsourcing can help your business reduce overhead and supplement your current capabilities.

Financial Management for Business Owners

We provide accounting services for the owners of our clients’ businesses. That means the same team you trust to manage your business can handle your personal finance needs, from tax preparation to wealth management. It’s simple, it’s convenient, and it allows us to maximize your tax savings strategy.

How We Give Back to DuPage County

We support our communities by serving on boards, providing pro-bono services, and donating to nonprofits.

Over our decades of service, we have contributed to numerous organizations across DuPage County. Today, we continue to support Choose DuPage, the Girl Scouts of DuPage County and Giving DuPage.

Service Area Map: DuPage County

We serve clients in communities across DuPage and the greater Chicagoland region. Our service area includes the following zip codes, as well as all others in the region:

  • 60148
  • 60126
  • 60540
  • 60188
  • 60564
  • 60133
  • 60565
  • 60101
  • 60504
  • 60103
  • 60185
  • 60563
  • 60137
  • 60517
  • 60139
  • 60187
  • 60532
  • 60515
  • 60181
  • 60527
  • 60189
  • 60516
  • 60502
  • 60108
  • 60561
  • 60439
  • 60559
  • 60172
  • 60106
  • 60521
  • 60191
  • 60555
  • 60143
  • 60523
  • 60514
  • 60190
  • 60184
  • 60157
  • 60666
  • 60199
  • 60116
  • 60117
  • 60122
  • 60125
  • 60128
  • 60132
  • 60138
  • 60186
  • 60197
  • 60399
  • 60519
  • 60522
  • 60566
  • 60567
  • 60572
  • 60570
  • 60598
  • 60599
  • 60569

Let’s Get Started

Searching for accounting firms in DuPage County, Illinois?

At D+L, we help Chicagoland clients build smarter, more efficient organizations. From basic accounting services to advisory and CFO-level solutions, our team provides the solutions you need—with a commitment to exceptional service and communication.

Connect with us today to learn how we can help you make the right business decisions with confidence.