The Business Owner's Year-End Tax Planning Checklist

The single biggest difference between business owners who overpay and those who keep more of what they earn is timing. Most tax-saving strategies must be executed before the calendar year ends. Once January 1 arrives, the options for reducing last year's tax bill narrow dramatically.

1. Review your entity and compensation structure

Confirm your entity election still fits your current profit level. If you have been taxed as a sole proprietorship and profits have grown, an S-election for next year could cut self-employment tax substantially. If you are already an S-corp, verify your reasonable salary is correctly set.

2. Maximize retirement contributions

• Fund your 401(k) and profit-sharing plan to the limits
• Evaluate whether a cash balance plan fits your income level
• Complete backdoor or mega-backdoor Roth conversions if eligible
• Confirm HSA and dependent-care contributions are maxed

3. Capture R&D and cost segregation opportunities

If you have engineering or development work that qualifies for the R&D credit, or real estate that could benefit from a cost segregation study, start the analysis now. Both can produce large deductions or credits tied to the current tax year if initiated in time.

4. Time income and expenses deliberately

• Accelerate deductible expenses (equipment, repairs, prepayments) into this year
• Defer income where possible — push invoices and collections into January
• Use Section 179 or bonus depreciation on qualifying asset purchases
• Review inventory methods and write off obsolete stock

5. Document everything

Every strategy you execute should be backed by documentation that would survive scrutiny: cost segregation engineering reports, R&D project records, salary justification, and retirement plan paperwork. IRS-compliant documentation is what turns an aggressive strategy into a defensible one.

6. Model next year before it starts

Use your current-year numbers to project next year's tax picture. That forecast is what tells you which strategies to put in motion in January — rather than discovering opportunities too late to use them.

Do not wait until April

If your accountant only talks to you at filing time, you are almost certainly overpaying. Year-end planning is where the real savings happen. Book a free discovery call to learn how year-end planning works and whether a Comprehensive Consultation fits your situation.