Filing season may be months away, but many of the decisions that affect your business tax return must be made before the year ends. Tax preparation reports what already happened. Year-end tax planning gives you a window to still change the outcome, while that window is open. At TriStar Tax & Business Solutions, we help business owners across Middle Tennessee use this stretch of the year to get ahead of it rather than react to it.
This checklist will help you organize your records, review potential deductions, estimate your tax liability, and enter 2027 prepared. Requirements vary based on your business structure, accounting method, industry, and state, so use this as your starting point before meeting with your tax professional.
What You’ll Learn in This Checklist
- Which financial records to reconcile before year-end
- How to review deductions and Q4 purchases without overspending for a tax break
- What contractor and payroll reporting needs attention now
- How to estimate your tax bill and protect cash flow
- What to bring to your year-end planning meeting
Year-End Tax Checklist for Business Owners at a Glance
Use this year-end tax checklist for business owners as your quick reference, then work through each item in detail below:
- Reconcile all bank, credit card, loan, and payment-processing accounts
- Review the year-to-date profit-and-loss statement and balance sheet
- Correct uncategorized transactions and owner-related expenses
- Collect missing receipts, invoices, and supporting documents
- Obtain completed Forms W-9 from applicable vendors
- Review contractor payments and payroll reporting
- Count inventory and update the fixed-asset list
- Review deductible expenses and planned Q4 purchases
- Update mileage and business-vehicle records
- Review retirement-plan and employee-benefit contributions
- Recalculate estimated taxes and reserve cash for payments
- Schedule a year-end planning meeting with a tax professional
1. Close the Books and Reconcile Every Account
Start with every account that touches business money: checking and savings, credit cards, lines of credit, payment processors like PayPal, Stripe, or Square, petty cash, and payroll-clearing accounts.
While reconciling, watch for duplicate transactions, uncategorized income and expenses, personal purchases paid from business accounts, and business expenses the owner paid out of pocket. These small errors compound quickly across a full year.
From there, generate an accurate year-to-date profit-and-loss statement and balance sheet, then add a reasonable forecast for the weeks remaining. Compare revenue against last year and your current budget, and check your gross-profit margin, receivables, payables, and estimated full-year net income.
2. Gather the Documents You’ll Need
Set up a secure digital folder for income records — sales reports, customer invoices, bank deposits, 1099s received, and documentation for any grants or insurance proceeds. Do the same for expenses: vendor invoices, rent and utilities, insurance, software subscriptions, professional fees, and vehicle records.
Add financing and asset records too, including loan statements, new financing agreements, and documentation for anything purchased, sold, or disposed of.
- Prepare Contractor and Payroll Records
Confirm you have a completed Form W-9 on file for every applicable contractor, and review total payments made during the year to identify who may need a 1099. Form 1099-NEC is generally due to both the IRS and the recipient by January 31 following the tax year, so resolving discrepancies now avoids a January scramble.
On payroll, reconcile your registers, quarterly returns, and federal and state deposits. Review bonuses, retirement contributions, health benefits, and owner or shareholder compensation. Some of these items need to be reflected in your final payroll run, so coordinate with your payroll provider and tax professional before it processes.
4. Review Business Deductions and Q4 Purchases
Commonly missed deduction categories include professional fees, business insurance, merchant-processing fees, education and training, and business-related phone and internet costs. Every expense still needs to satisfy applicable tax rules and be supported by adequate records, not everything is automatically deductible just because it’s business-related.
If you’re weighing equipment or technology purchases before year-end, note that eligible property placed in service after January 19, 2025 may qualify for a 100% first-year depreciation deduction. But eligibility, timing, and your overall tax position all need review first, and simply ordering or paying for equipment isn’t enough, in many cases, it must be ready and available for business use by the required date.
One caution worth repeating: don’t spend $10,000 solely to get a deduction. A deduction reduces taxable income. It doesn’t reimburse the purchase price.
5. Update Inventory, Fixed Assets, and Vehicle Records
If your business carries inventory, complete a physical count and reconcile it against your accounting records, flagging anything obsolete or unsellable. Update your fixed-asset list with purchase dates, business-use percentages, and whether each asset is still owned and in use.
For vehicles, gather odometer readings and mileage logs. One 2026 wrinkle worth knowing: the IRS set the business mileage rate at 72.5 cents per mile for January through June, then raised it to 76 cents effective July 1. Keep January–June and July–December mileage separate before calculating your deduction.
6. Review Receivables, Payables, and Timing
Review your accounts receivable aging report, follow up on overdue invoices, and confirm payments landed in the correct year. Do the same on payables — verify unpaid vendor invoices and watch for duplicates.
Whether income and expenses count this year or next often depends on whether your business uses cash or accrual accounting. Talk to your tax professional before accelerating expenses, delaying invoices, or changing your normal billing practices to shift the picture.
7. Estimate Your Tax Bill
Use your year-to-date results and Q4 forecast to estimate federal, state, self-employment, and any entity-level tax you’ll owe, then compare that against what you’ve already paid through estimated payments and withholding.
Set aside a dedicated tax reserve rather than pulling from operating cash you’ll need for payroll or inventory. The IRS employment tax due dates page is a useful reference for upcoming filing and payment deadlines.
8. Review Retirement Plans and Benefits
Confirm required employer contributions have been made and owner contributions are on track. For 2026, the 401(k) elective-deferral limit is $24,500, the SEP maximum is $72,000, and the SIMPLE plan limit is $17,000 before catch-ups. If a different plan structure might serve your business better next year, raise it now, plan changes take lead time.
9. Revisit Your Business Structure
Profitability changes, and the entity structure that made sense a few years ago may not fit anymore. Owner compensation, distributions, and any new states you’re operating in are worth a conversation, the right structure depends on your complete financial picture, not a reflexive election.
10. Prepare Your Year-End Package
Pull together your profit-and-loss statement, balance sheet, general ledger, reconciliations, payroll and contractor reports, inventory count, and estimated-payment confirmations. Walk into your planning meeting ready to ask: Is my projected tax liability accurate? Are any deductions missing? What needs to happen before December 31?
Common Mistakes to Avoid
Waiting until filing season to start, mixing personal and business expenses, collecting W-9s after a contractor has already left, and assuming bookkeeping profit equals taxable income are the mistakes we see most often, all avoidable with a few weeks of lead time.
Get Help with Your Year-End Tax Review
Year-end tax planning is most effective before the year is over. TriStar Tax & Business Solutions works with small business owners across Nashville, Hendersonville, Brentwood, Murfreesboro, and Germantown to evaluate financials, estimated payments, deductions, and remaining action items through our Small Business Tax Planning Service and ongoing Quarterly Tax Advisory Service. If part of your review involves rethinking your entity structure, our piece on whether an S-corp election makes sense is a good place to start.
TriStar Tax & Business Solutions is locally owned and family-operated. All services are by appointment only. Your initial consultation is free.
Frequently Asked Questions
When should business owners begin year-end tax planning? Ideally during Q3 or early Q4, leaving enough time to correct records and act before deadlines close.
What documents should I give my accountant at year-end? Financial statements, reconciliations, payroll records, contractor information, asset purchases, mileage logs, and estimated-tax payment confirmations.
Can I deduct equipment purchased at the end of the year? Potentially, but the equipment must meet eligibility rules and be placed in service on time.
Do I need Forms W-9 from every vendor? Not every vendor requires a 1099, but collecting an accurate W-9 helps determine your reporting obligations.
How can I avoid a surprise tax bill? Keep current bookkeeping, forecast full-year income, and meet with your tax professional before the final weeks of the year.