Oldenburg Accountants & Advisors

Oldenburg Accountants & Advisors I have a boutique CPA firm serving business owners. I help them structure a tax-advantaged deal when buying or selling the business.

I prepare accurate financial statements and meet regularly with business owners to help them interpret the financials. Since 1991, Oldenburg Accountants & Advisors has been committed to providing reliable, high-quality tax, accounting and advisory services to small and medium-sized enterprises (SMEs) in northern Illinois and Chicagoland. Our clients are family-owned businesses and often, multi-gen

erational. Oldenburg Accountants & Advisors a small, boutique CPA firm where the owner, Sue Oldenburg, is directly involved with every business owner client. We have a reputation for sustaining long-term relationships with our clients. We work proactively with SME business owners to help them interpret and act upon the financial indicators of their businesses so they can make decisions based on reality instead of operating in the dark. We specialize in assisting our clients to:
--Track profitability by job, customer, product, department or location
--Forecast and improve cash flow
--Benchmark against their peers in their industry
--Determine critical success factors for their particular business
--Establish and measure key performance indicators
--Present financial information to banks to win loans

Owner and founder Susan A. Oldenburg is an experienced business owner with more than twenty-five years in the public accounting industry. As both a CPA (Certified Public Accountant) and EA (Enrolled Agent), Sue has a comprehensive knowledge of business planning and monitoring as well as a specialized knowledge of taxation. Under both designations, she has unlimited practice rights and is unrestricted to which taxpayers can be represented before the IRS. When she is not at the office, you can find her reading, listening to music, cooking, spending time with her cat Lizzi and relaxing with friends and family in Door County.

Small business owners, beware: Tax identity theft is a costly, ongoing threat. Criminals may file fraudulent returns usi...
06/04/2026

Small business owners, beware: Tax identity theft is a costly, ongoing threat. Criminals may file fraudulent returns using a business’s EIN, impersonate executives to steal employee W-2 data, or use forged IRS documents to pose as a business for financial or tax-related activity. Protect your organization by implementing a cybersecurity plan, securing sensitive data, training employees and using technology tools such as encryption and multi-factor authentication. Working with a trusted tax professional is also critical. We can review your risks, recommend safeguards and determine the next steps if something looks suspicious. Contact us at (847) 263-0303 to learn more.

A donor-advised fund (DAF) is one option available to support charities while reducing your taxable estate. By contribut...
06/03/2026

A donor-advised fund (DAF) is one option available to support charities while reducing your taxable estate. By contributing cash or appreciated assets to a DAF, you also may qualify for an immediate charitable income tax deduction without needing to identify the specific charitable recipients right away. This gives you more time to research potential recipients or change the organizations you support from year to year. For families focused on legacy planning, DAFs can also help align heirs around charitable goals. Contact us at (847) 263-0303 for additional details.

Is your business paying for insurance coverage you don’t need — or missing protection where risk may be significant? You...
06/02/2026

Is your business paying for insurance coverage you don’t need — or missing protection where risk may be significant? You may have many options to choose from, depending on your organization’s operations and risks. General liability is the most basic policy, and it’s often paired with product liability, professional liability and property coverage. Other products include employment practices liability, business interruption, key person and cyberinsurance policies. Work with an independent broker to learn more about each type. And call us at (847) 263-0303. We can help you evaluate potential coverage gaps and manage business risk cost-effectively.

It’s almost never too late to start planning for retirement. Whether you already have large 401(k) or IRA balances or ar...
06/01/2026

It’s almost never too late to start planning for retirement. Whether you already have large 401(k) or IRA balances or are starting from scratch, we can help craft a strategy that reflects your personal situation and addresses your goals. So start thinking about what’s important to you: Building a big nest egg, reducing income tax liability, something else … We’re here to help make it possible!

Does your business own commercial real property? A closer look at your building costs could change how quickly you can d...
05/28/2026

Does your business own commercial real property? A closer look at your building costs could change how quickly you can deduct those expenses.

Business buildings generally have a 39-year depreciation period. A cost segregation study separates various building components, such as electrical systems and flooring. It then allows these components to be reclassified and deducted over a much shorter period, thereby deferring taxes and boosting cash flow. Recent tax law changes enhanced these benefits by increasing first-year depreciation write-offs.

Call us at (847) 263-0303 to discuss whether this strategy is right for your business. We can determine reasonable cost allocations to help withstand IRS scrutiny.

No two taxpayers are exactly alike — so your tax strategies shouldn’t be either. Our firm provides customized tax planni...
05/27/2026

No two taxpayers are exactly alike — so your tax strategies shouldn’t be either. Our firm provides customized tax planning for individuals and businesses. We can identify opportunities to reduce taxes in your specific situation while helping you stay compliant with changing tax laws. Call us at (847) 263-0303 to get started.

Some small business owners assume that offering their employees a retirement plan is cost prohibitive. But two plans are...
05/26/2026

Some small business owners assume that offering their employees a retirement plan is cost prohibitive. But two plans are particularly suited to employers with fewer than 100 workers: SEP and SIMPLE IRAs. Only employers can make contributions to SEP IRAs — which provide high contribution limits — but you aren’t required to fund accounts when cash-flow constraints make it difficult. SIMPLE IRAs allow both employers and participants to make higher annual contributions than participants could with self-owned IRAs. Plus, your business’s contributions are tax-deductible. Call us at (847) 263-0303 to review your budget and benefit needs and suggest an appropriate plan.

Fringe benefits offer multiple business advantages. They can boost morale, attract and retain top talent, and qualify fo...
05/25/2026

Fringe benefits offer multiple business advantages. They can boost morale, attract and retain top talent, and qualify for potential tax breaks. That’s why it’s smart to review which ones you sponsor and what you may be missing. Of course, you don’t want to spend time and resources sponsoring benefits your employees don’t value. And you must follow specific rules and documentation requirements to be eligible for tax-advantaged treatment. Contact us at (847) 263-0303 for help choosing the right fringe benefits for your business and managing the tax impact.

C corporation shareholders usually owe tax on gains from selling stock. But qualified small business (QSB) stock sales m...
05/21/2026

C corporation shareholders usually owe tax on gains from selling stock. But qualified small business (QSB) stock sales may qualify for a special gain exclusion. To be eligible for this break, certain requirements must be met.

QSB stock acquired after Sept. 27, 2010, may be eligible for a 100% gain exclusion if it’s held for at least five years. Under recent tax law changes, QSB stock acquired after July 4, 2025, may be eligible for a partial gain exclusion if it’s held for at least three years.

Call us at (847) 263-0303 to learn whether this tax-saving strategy is right for your business. We can help structure your business to unlock the potential tax savings and navigate the complex rules.

Do you dream of retiring early? As in, really early? So do adherents of FIRE (Financial Independence, Retire Early). Man...
05/20/2026

Do you dream of retiring early? As in, really early? So do adherents of FIRE (Financial Independence, Retire Early). Many FIRE followers aim to retire in their 40s or even 30s! They make it happen by saving at least 50% of their current income, which some maximize by working second jobs. Obviously, this requires discipline and planning. But if early retirement is a priority, call us {Phone%} so we can help you make it happen.

Address

100 N Atkinson Road, Suite 106
Grayslake, IL
60030

Opening Hours

Monday 8am - 5pm
Tuesday 8am - 5pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 8am - 5pm

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