As summer fades and we enter the final months of 2026, the window for proactive tax planning begins to close. For business owners and entrepreneurs, the upcoming months—September through December—are critical for implementing strategies that will minimize liabilities and maximize capital before the year ends.
Waiting until January to review your financials is a costly mistake. By utilizing the upcoming months to strategically manage your income and expenses, you can take control of your 2026 tax outcomes. Here are the best tips to focus on as we head toward the end of the year.
As you approach the Q3 (September 15) and Q4 (January 15) estimated tax deadlines, review your year-to-date profit and loss statements. Did your business scale faster than anticipated this summer? If your revenue is significantly higher than projected, you may need to increase your upcoming estimated payments to avoid steep underpayment penalties. Conversely, if expenses were higher than expected, adjusting your payments down can free up essential cash flow for the holidays.
If your business is projecting a high net profit for 2026, consider accelerating your capital expenditures. The upcoming months are the perfect time to purchase necessary vehicles, heavy machinery, or specialized technology. Thanks to Section 179 and potential bonus depreciation rules, placing these assets into service before December 31st can allow you to write off a massive portion—or even the entirety—of the purchase price in the current tax year.
One of the most effective ways to lower your taxable income is through strategic retirement contributions.
Do not wait until tax season to discover missing receipts or uncategorized expenses. Dedicate time in October or November to clean up your bookkeeping.
If you operate on a cash basis and expect to be in a higher tax bracket this year, employ the classic "defer and accelerate" strategy. In November and December, consider holding off on sending final invoices until late December so the payments arrive in January (deferring income to 2027). Simultaneously, prepay January rent, insurance premiums, or vendor services in December (accelerating expenses into 2026).
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