Before December 31: Seven Questions Worth Asking About Your Business Taxes
October is a useful time to look at the year you’ve had—and the year you expect to finish with. Many tax decisions are easier to evaluate before your books are closed and before important deadlines pass.
Year-end tax planning is not just buying things for a deduction. It’s estimating your tax position, understanding your business’s cash flow, and deciding whether any actions support both your finances and your long-term goals.
Do You Know Your Expected Full-Year Profit?
Start with a year-to-date profit and loss statement, then estimate what November and December may bring. Compare actual revenue and expenses with your business cash balances; profit and available cash are not the same thing.
Ask: Is this year materially different from last year? Have you accounted for outstanding invoices, costs, payroll, and any unusual transactions? Your business’s accounting method also matters.
Have You Reviewed Your Estimated Taxes and Withholding?
As profits change, required estimated payments may change too. Review federal and state payments, W-2 withholding, and any safe-harbor considerations rather than guessing a percentage of gross revenue.
For many calendar-year individual taxpayers, the fourth 2026 federal estimated installment is generally due January 15, 2027, subject to exceptions. Underpayment penalties can arise even if the eventual return shows a refund.
Are Your Business Records Current Enough to Make Decisions?
Reconcile bank and credit card accounts; review payment processor deposits, 1099 income, personal expenses accidentally paid through the business, unpaid bills, fixed assets, and prior-year carryforwards.
Good planning starts with reliable numbers. An inaccurate profit figure can make even a carefully constructed projection misleading.
Are You Considering Equipment Purchases for Business Reasons?
Before making a major purchase, ask whether the equipment is genuinely needed and whether your business can afford it. Tax deductions can lower the after-tax cost of qualifying purchases, but they do not make those purchases free.
Depreciation and expensing rules can depend on the type of asset, business use, and when the property is placed in service. Paying for something before year-end does not automatically mean you can deduct its entire cost that year.
Should You Review Retirement Contributions?
Depending on your business and circumstances, an IRA, SEP, or one-participant 401(k) may be worth discussing. Contribution limits, eligible compensation, employee coverage, adoption timing, and funding deadlines vary by arrangement.
For example, an eligible SEP can generally be established by the business return due date, including extensions. That does not mean every retirement-plan decision can wait until the following spring.
Does Your Entity and Compensation Strategy Still Fit?
Growth may change the conversation about entity classification or owner compensation. If you operate an S-Corporation, review reasonable wages, payroll, shareholder distributions, and basis records. If you file Schedule C, consider whether a classification analysis is warranted—not because an S-Corp is always better, but because the facts may have changed.
Election deadlines and effective dates are separate from general year-end planning, so do not assume you can retroactively change status simply by preparing a different return.
What Should You Set Up Now for Next Year?
Year-end planning should inform your 2027 habits: bookkeeping close routines, tax-payment reminders, owner compensation reviews, retirement funding, and quarterly check-ins. You may not need ongoing advisory support for every issue, but recurring surprises are a sign that a more proactive process could help.
Ask yourself: Which decision needs to be made now, which one can wait until filing season, and what information will I need to make that decision?
Build Your Personal Year-End Review List
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Frequently Asked Questions
Is every year-end tax decision due December 31?
No. Deadlines vary by election, retirement plan, contribution type, expenditure and business tax year. Verify the specific deadline before acting.
Does buying business equipment always lower my tax bill?
Not necessarily. Deductions depend on applicable law, business use, cost recovery rules and when property is placed in service. A purchase still reduces your cash.
Can I wait until April to worry about estimated taxes?
Not always. Federal estimated payments have periodic due dates; the fourth 2026 individual installment is generally due January 15, 2027, subject to exceptions.
Is an S-Corp the right choice once my business is profitable?
Profitability is only one consideration. Reasonable compensation, state treatment, administrative costs, eligibility and other facts all matter.
Can I still make retirement contributions after December 31?
Certain plans and contributions may permit later deadlines, but rules differ. Confirm the exact arrangement, employee circumstances and applicable dates.
What is the difference between a tax projection and tax preparation?
A projection estimates the current-year result using assumptions before the year is over; preparation reports actual prior-year results under the applicable rules.
Give Your Numbers a Purpose Before Year-End
Use our free Safe Harbor Calculator to start exploring payments, or learn about tax advisory if you want a personalized projection and planning discussion.
General education only; not individualized tax, legal or investment advice. Year-end decisions and deadlines require fact-specific review. Last reviewed October 2026.
