The October 15 extension deadline has passed, which means every 2025 return is now filed or late. For founders, that closes one season and opens a shorter, more valuable one: the roughly ten weeks left to make decisions that change your 2026 tax bill. After December 31, most of those levers are gone. The businesses that keep more of what they earn are not smarter about tax law – they just run the checklist while the calendar still allows choices.
Key takeaways
- Spending and timing decisions that lower your 2026 tax bill must be made by December 31. After that you are reporting, not planning.
- The IRS cares about documentation before it cares about deductions: records for gross receipts, purchases, expenses and assets, kept in an orderly system.
- Section 179 (up to $2,560,000 in 2026) and 100 percent bonus depreciation let you write off qualifying equipment in the year you place it in service – “in service” by year-end is the operative phrase.
- The fourth-quarter 2026 estimated payment is due January 15, 2027. Put it on the calendar now.
This article is general information, not tax advice. Your situation has specifics a checklist cannot see, and a CPA or enrolled agent earns their fee this time of year.
Start with records, because the IRS does
Before deductions, the IRS wants a recordkeeping system that clearly shows income and expenses. Per the IRS recordkeeping guidance, your books must show gross income, deductions and credits, and the supporting documents – sales slips, paid bills, invoices, receipts, deposit slips, canceled checks – are what back the entries if anyone asks. The IRS lists four categories to keep: gross receipts, purchases, expenses, and assets. Employment tax records must be kept for at least four years.
Year-end is the moment to close the gaps while the year is still memorable: missing receipts reconstructed, the business checking account reconciled against the books, contractor payments collected for 1099-NEC reporting, and asset purchases documented with acquisition date, cost and use. Doing this in November is an afternoon. Doing it in April is a week.
The deduction sweep
The Xero 2026 small business deductions checklist, written by an IRS Enrolled Agent, runs the full category list – advertising, contract labor, insurance, legal and professional fees, rent, software, travel, vehicle expenses, and more. The test for all of them is the IRS phrase “ordinary and necessary”: common in your industry and helpful for running the business. A few categories carry rules worth checking before year-end rather than after:
- Meals with clients and travel meals are 50 percent deductible in 2026; company-wide events like a holiday party stay 100 percent deductible.
- Business gifts cap at $25 per recipient per year.
- Home office costs require a workspace used exclusively and regularly for business.
- Start-up costs: up to $5,000 deductible in year one, the rest spread over 15 years.
The December 31 levers
Two provisions make the calendar matter. Section 179 lets you deduct up to $2,560,000 of qualifying equipment in 2026, and 100 percent bonus depreciation covers the rest of eligible purchases – but only for assets placed in service by year-end. A laptop ordered December 29 and set up in January is a 2027 deduction. If you have planned equipment purchases and the revenue to justify them, the delivery date is a tax decision.
The same logic runs in reverse for income and expenses you control: costs paid before December 31 land in 2026, and for cash-basis businesses, so does the timing of invoices. Larger businesses should note the inventory wrinkle in the Xero guide: under IRS Revenue Procedure 2025-32, you qualify as a small business for simplified inventory treatment only if average annual gross receipts for the prior three tax years stay at or under $32 million.
The dates left in 2026
- Now through December 31: the window for equipment-in-service decisions, retirement plan contributions, expense timing and record cleanup.
- January 15, 2027: fourth-quarter 2026 estimated tax payment due.
- Then filing season, with clean records instead of a shoebox.
The founders who dread tax season are usually paying for a missing November, not a complicated business. Run the sweep while the year is still fixable, then hand your preparer a business that is already organized. The fee goes down and the deductions stop leaking.
Frequently asked questions
What tax moves can I still make for 2026?
Until December 31: place qualifying equipment in service to use Section 179 or bonus depreciation, time deductible expenses into 2026, make retirement plan contributions, and close documentation gaps while the year is fresh. After year-end the remaining lever is filing accurately.
What records does the IRS expect a small business to keep?
Documents supporting gross receipts, purchases, expenses and assets – invoices, receipts, deposit slips, canceled checks, account statements – organized so they back the entries in your books. Employment tax records must be kept for at least four years.
When is the next estimated tax payment?
The fourth-quarter 2026 estimated payment is due January 15, 2027, per IRS estimated tax guidance cited in the Xero checklist.
Are client meals still deductible?
Business meals with clients and travel meals are 50 percent deductible in 2026. Company-wide events such as a holiday party remain 100 percent deductible. Business gifts are capped at $25 per recipient per year.
Method: IRS recordkeeping guidance (page reviewed August 3, 2026) and the Xero US small business tax deductions checklist for 2026 (published October 6, 2026, written by an IRS Enrolled Agent), both fully fetched October 18, 2026. Dollar figures and percentages are as stated by those sources for tax year 2026. This article is general information, not tax or legal advice; consult a CPA or enrolled agent about your specific situation. Photos are illustrative desk scenes, not images of any real records or business.
