Tax Planning

Year-End Tax Planning Strategies for Small Business Owners

A year-end checklist for small business owners: timing income and expenses, equipment purchases, retirement contributions, payroll, and the books, before December 31.

Dushyant Hirwani
October 11, 2026 · 8 min read
The short answer

Year-end tax planning means acting before December 31 on the items that are still in your control: timing of income and expenses, equipment purchases, retirement plan setup and contributions, owner pay, payroll, and clean books. Many strategies have deadlines that pass on December 31, so plan in October or November.

On this page
  1. 1. Know where you stand now
  2. 2. Timing of income and expenses
  3. 3. Equipment and asset purchases
  4. 4. Retirement plans
  5. 5. Owner pay and entity checks
  6. 6. Payroll and information returns
  7. 7. Estimated taxes
  8. 8. Clean up the books

Tax planning is the part of accounting that happens while there is still time to change the result. After December 31 you can only report what happened. Before it, you can choose.

For specific fall dates, our guide to September and October tax deadlines is a useful companion.

1. Know where you stand now

  • Get a current profit and loss through the latest month, reconciled. If your books are behind, see what to do when your books are months behind.
  • Project taxable income for the full year.
  • Compare estimated tax payments to the projected liability.
  • Identify what is unusually high or low compared with last year.

2. Timing of income and expenses

Cash-method businesses can often influence which year income and expenses land in, for example by billing timing and paying expenses before year-end. Deferring income only helps if next year's tax rate is not higher, and accelerating expenses only helps if they are real business costs you would incur anyway. Do not buy things you do not need for a deduction.

3. Equipment and asset purchases

Equipment generally must be placed in service by December 31 to count for that year. Depreciation rules, including Section 179 expensing and bonus depreciation, have limits and phase-outs that have been changed by recent legislation, so confirm current figures for the year you buy. Buying only to save tax is rarely wise.

4. Retirement plans

  • Setting up a plan and making employee deferrals can have year-end deadlines that differ from tax-filing deadlines.
  • Some employer contributions, such as to a SEP IRA, can be made up to the filing deadline including extensions.
  • Contribution limits adjust annually, so confirm the current year's limits.
  • S corporation owners need W-2 wages to support many contribution types.

5. Owner pay and entity checks

  • S corporation owners: review whether salary is reasonable. See S-corp reasonable salary.
  • Confirm owner basis before taking large distributions or claiming losses.
  • Consider whether an entity change makes sense for next year. See LLC taxed as S corp.
  • Include health insurance for more-than-2% S corporation shareholders in W-2 wages as required.

6. Payroll and information returns

  • Confirm payroll tax deposits are current.
  • Collect W-9s from contractors and verify addresses.
  • Prepare for Forms W-2 and 1099-NEC, generally due to recipients by January 31.
  • Check reporting thresholds for the year, which have changed in recent legislation.

7. Estimated taxes

The final installment is generally due January 15. Compare payments to safe-harbor targets before then. See quarterly estimated taxes for LLC owners.

8. Clean up the books

Reconcile all accounts, clear uncategorized items, and review receivables and payables. Clean books let your preparer file quickly and accurately. See how to fix messy QuickBooks records before tax season.

A note on rules

Tax limits and deadlines change, and several provisions have been amended by recent legislation. Treat this as a checklist of topics to discuss, and confirm current figures before acting.

Our tax planning service reviews these items with your actual numbers. To plan before year-end, schedule a business tax planning consultation. Savings are never guaranteed.

#small business year end tax planning#tax planning#deductions#retirement contributions#december 31
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FAQ

Frequently asked questions

Quick answers to what owners ask most about this topic.

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When should small businesses start year-end tax planning?
Ideally in October or November. Several strategies, such as equipment purchases and retirement plan setup, have deadlines on or before December 31, so planning after the year ends is too late for many of them.
Should I buy equipment before year-end to save taxes?
Only if the business genuinely needs it. A deduction saves a portion of the cost, not all of it, and rules such as Section 179 and bonus depreciation have limits that should be confirmed for the year of purchase.
Can I fund a retirement plan after December 31?
Some employer contributions, such as to a SEP IRA, can be made up to the filing deadline including extensions. Other plans have year-end deadlines for setup or employee deferrals, so confirm plan-specific rules.
What is the deadline for W-2s and 1099-NECs?
Both are generally due to recipients and the government by January 31 of the following year. Check current rules and thresholds for the year in question.
Does year-end planning apply to S corporations differently?
Yes. Owner salary, basis, distributions, and health insurance reporting all need year-end review in addition to the general items.
What if my books are not up to date in December?
Catching up before planning is critical, because projections depend on accurate numbers. If time is short, get a reconciled estimate through the latest month at least.