Why You Still Owe Taxes With an S-Corp
Updated: Oct 12
By David Fiene, CPA | Advantage Accounting Group
You set up an S-Corp because you heard it could save you money on taxes. You’re running payroll and taking distributions. Then tax time arrives, and you still owe a large amount.
Was the S-Corp a mistake? Not necessarily. An S-Corp can help with part of your tax picture, but it does not automatically handle everything else. Here are the main reasons a big bill can still happen—and what to review during the year.
1. Your business profit is still taxable
An S-Corp generally passes its taxable profit through to your personal tax return. Leaving money in the business does not, by itself, prevent that profit from being taxed.
For example, suppose you are the sole owner and the business has $150,000 of taxable profit after your salary and other deductible expenses. You generally report that $150,000 even if you only take $80,000 in distributions. Your wages are reported separately.
The amount you withdraw and the amount of taxable profit are different numbers. Start by asking your CPA what your expected taxable profit is for the year.
2. Payroll tax savings do not eliminate income tax
An S-Corp may reduce Social Security and Medicare taxes compared with operating as a sole proprietor. But an owner who works in the business generally must receive reasonable compensation for those services before receiving non-wage distributions.
Paying yourself less is not automatically a better strategy. Your salary needs to reflect your work, and your overall savings need to be weighed against the costs of operating the S-Corp.
Ask: “Is my salary reasonable for what I do, and is this business structure still making sense for me?”
3. Your tax payments may not match your income
It is easy to assume taxes are covered because money is withheld from your paycheck. But that withholding may not cover the tax on your business profit or other household income.
A tax projection brings those pieces together: your wages, business profit, spouse’s income, investments, and other income. Then you compare the expected tax with your withholding and estimated payments.
There is an important distinction here: increasing your payments does not reduce your total tax. It helps cover what you owe and avoid an unexpected balance. Looking for tax savings is a separate part of the review.
4. Business expenses may be getting missed
Have you paid business expenses from your personal account? Are your mileage records current? Have you discussed how home office costs and owner health insurance should be handled?
These are useful questions to bring to your CPA. S-Corp owners need to pay attention to how expenses are documented, reimbursed, and reported. Simply handing over a total at tax time may leave extra work or missed opportunities.
Make a list of business costs you pay personally and review the reimbursement process with your CPA. Keeping your books current makes that conversation much easier.
5. Retirement planning needs its own review
An S-Corp does not automatically give you the right retirement plan. The choice depends on factors such as your employees, income, cash flow, and savings goals.
For S-Corp owner-employees, retirement contributions are based on eligible compensation—not shareholder distributions. That is one reason payroll and retirement planning should be considered together.
Ask about the plan, contribution options, and applicable deadlines before year-end so you have time to act.
What should you do next?
A large balance due does not, on its own, prove you paid too much tax or chose the wrong business structure. It does give you a reason to understand what happened.
Start with one question: “Has someone reviewed my expected income, tax payments, and possible savings this year?”
At Advantage Accounting Group, we help business owners connect accurate accounting with year-round tax planning. Reviewing the numbers during the year gives us time to discuss changes while there are still decisions to make.
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