Don't wait until April to think about your taxes. The decisions you make before December 31st can have a significant impact on your tax bill. Here's a practical checklist every Colorado business owner should work through before the year ends.
📋 Income & Expense Review
- Review your profit & loss statement through November
- Estimate your December income and expenses
- Identify any outstanding invoices that may come in before year-end
- Consider deferring income to January if it benefits your tax situation
- Accelerate deductible expenses into December (supplies, subscriptions, equipment)
💰 Retirement Contributions
Maximizing retirement contributions is one of the most effective ways to reduce your taxable income. If you have a SEP IRA, SIMPLE IRA, or Solo 401(k), make sure you're contributing as much as you can before the deadline.
- Max out your Solo 401(k) employee contributions by December 31st
- Plan employer contributions (SEP IRA deadline extends to your tax filing date)
- Consider a Defined Benefit Plan if you have consistently high income
- Review contribution limits — they increase periodically
🏢 Business Purchases & Equipment
Section 179 allows you to deduct the full purchase price of qualifying equipment and software purchased during the tax year. If you've been putting off a necessary business purchase, doing it before December 31st could provide a significant tax benefit.
💡 Pro Tip: This includes computers, office furniture, vehicles (with limitations), and even certain software subscriptions. Just make sure the item is placed in service before year-end.
📊 Estimated Tax Payments
Review your quarterly estimated tax payments to make sure you've paid enough to avoid underpayment penalties. Your Q4 estimated payment is due January 15th, but planning for it now ensures you're not caught off guard.
🎁 Charitable Contributions
If you're planning charitable donations, make them before December 31st to claim the deduction this tax year. Consider donating appreciated stock instead of cash — you'll avoid capital gains tax and still get the full fair market value deduction.
📁 Record Keeping
- Organize receipts and documentation for all deductions
- Reconcile your bank and credit card statements
- Update your mileage log if you use your vehicle for business
- Gather 1099 information for contractors you've paid $600+
- Review your bookkeeping for any missing transactions
🏔️ Colorado-Specific Considerations
Colorado has its own tax rules that can impact your planning. Make sure you're aware of state-specific deductions, the FAMLI program contributions, and any local tax obligations based on where your business operates.
Start Now, Not in April
The most effective tax planning happens before the year ends — not when you're scrambling to file. Taking an hour or two now to review this checklist could save you thousands in taxes and eliminate the stress of tax season.