What services does DWK Tax & Accounting offer?

DWK Tax & Accounting offers tax preparation and planning, bookkeeping, accounting, business advisory, and outsourced CFO services for individuals and small businesses in Wheaton, IL and DuPage County.

Where is DWK Tax & Accounting located?

DWK Tax & Accounting is based in Wheaton, Illinois, serving clients throughout DuPage County including Naperville, Glen Ellyn, Lisle, Downers Grove, and the greater Chicago suburbs.

Do you work with small businesses?

Yes. DWK Tax & Accounting specializes in serving small business owners, entrepreneurs, and growing companies who need more than basic tax compliance, including strategic advisory and fractional CFO support.

How do I schedule a consultation?

You can schedule a consultation by visiting https://dwkcpa.com/contact, calling (708) 369-0044, or emailing david@dwktaxaccounting.com.

What is the most common small business tax mistake?

The most common mistake is remaining a sole proprietor when an S corp election would save thousands. Once your net profit exceeds roughly $60,000-$80,000, the S corp election splits income into a reasonable salary and distributions, reducing self-employment tax. Many business owners never make this election because no one told them it was an option.

How does poor recordkeeping affect my taxes?

Poor recordkeeping leads to missed deductions, inaccurate financials, and tax returns prepared from estimates rather than actuals. Without organized books, you cannot tell which expenses are deductible, you risk underreporting income (an IRS red flag), and you cannot implement proactive tax planning. The cost of poor recordkeeping is measured in missed deductions and overpaid taxes.

What happens if I mix personal and business expenses?

Commingling personal and business expenses is a serious mistake that can pierce the corporate veil, jeopardizing the legal protection your entity provides. It also makes bookkeeping a nightmare, complicates tax preparation, and raises audit red flags. Always maintain separate bank accounts and credit cards for your business.

Why do small businesses miss the quarterly tax payment deadline?

Many new business owners do not know they need to make quarterly estimated payments, they assume taxes are only due in April. Others know but do not calculate the correct amount. Missing quarterly payments triggers underpayment penalties (currently around 8% annually) that could have been avoided with proper planning.

How can a CPA help me avoid tax mistakes?

A CPA identifies and prevents mistakes before they happen, choosing the right entity, setting up proper bookkeeping, calculating quarterly payments, capturing every deduction, and ensuring your return is accurate and compliant. The cost of a CPA is typically far less than the cost of the mistakes they prevent.

Common Small Business Tax Mistakes

Small business owners lose thousands of dollars every year to tax mistakes that are entirely preventable. These errors are not caused by dishonesty or negligence, they happen because most owners are experts in their business, not in tax law. Here are the most common small business tax mistakes we see, and how to avoid them.

1. Staying a Sole Proprietor Too Long

The single most expensive mistake is remaining a sole proprietor when an S corp election would save thousands. As a sole proprietor, every dollar of profit is subject to self-employment tax (15.3%). Once your profit consistently exceeds $60,000-$80,000, electing S corp taxation splits your income into a reasonable salary (subject to payroll tax) and distributions (not subject to self-employment tax). The savings can exceed $3,000 per year and grow with income. Learn more about S corp tax preparation.

2. Mixing Personal and Business Finances

Using the same bank account for personal and business expenses is a recipe for disaster. It makes bookkeeping nearly impossible, complicates tax preparation, and, for LLCs and corporations, can pierce the corporate veil, eliminating the legal protection your entity provides. Always maintain separate bank accounts and credit cards for your business, and document every transaction with a business purpose.

3. Skipping Quarterly Estimated Payments

When you are self-employed, no one withholds taxes from your income. You must make quarterly estimated payments to the IRS and Illinois, April 15, June 15, September 15, and January 15. Missing these payments triggers underpayment penalties at approximately 8% annually. Many new business owners do not learn about quarterly payments until they receive a tax bill with penalties attached. Read our guide on quarterly tax payments.

4. Poor Recordkeeping

Shoeboxes of receipts, spreadsheets that do not reconcile, and books that are months behind, these are the recordkeeping problems that lead to missed deductions, inaccurate returns, and overpaid taxes. Without current, organized books, your tax return is prepared from estimates, and estimates miss deductions. Our monthly bookkeeping service keeps your books current and your tax return accurate.

5. Missing Deductions

Common missed deductions include home office, vehicle and mileage, retirement contributions, health insurance premiums, Section 179 equipment expensing, business meals, and travel. Tax software asks what you know about; a CPA asks what you did not know to look for. Our top tax deductions guide covers the most valuable ones.

6. Not Planning Before Year-End

The biggest tax savings come from planning before December 31, timing equipment purchases, making retirement contributions, adjusting estimated payments, and implementing entity changes. Once the year ends, most strategies are no longer available. Yet many business owners do not think about taxes until March, when it is too late to act. Our tax planning service works ahead of the calendar.

7. Using the Wrong Entity Structure

Choosing an entity without analyzing the tax implications is a costly mistake. A single-member LLC taxed as a sole proprietorship may be simple, but it overtaxes a profitable business. A C corporation may offer benefits but create double taxation. A partnership requires careful K-1 allocation. We help you choose the entity that balances legal protection, tax efficiency, and administrative simplicity through our startup accounting service.

8. Not Issuing 1099s to Contractors

If you pay a contractor $600 or more in a year, you must issue a Form 1099-NEC by January 31. Failing to file 1099s can result in penalties of $50-$280 per form, and the IRS may disallow the deduction for the contractor's services. We track contractor payments and prepare 1099s as part of our payroll services.

How to Avoid These Mistakes

Every mistake on this list is preventable with proper CPA guidance. A CPA helps you choose the right entity, set up proper bookkeeping, calculate quarterly payments, capture every deduction, and plan before year-end. The cost of a CPA is typically far less than the cost of the mistakes they prevent. We serve business owners across Wheaton, Naperville, and Downers Grove.