Year-end is the most important time of year for your business finances. What you do — or don't do — in the last few months of the year has a direct impact on your tax bill, your ability to get financing, and how smoothly the new year starts.

The good news: if you've been keeping up with your books throughout the year, year-end is mostly a review. If you haven't, now is the time to catch up before things get more complicated.

Here's a practical checklist for Houston small business owners.

This is the foundation of everything else. Every bank account and credit card your business uses needs to be reconciled through the end of the year.

Reconciliation means matching every transaction in your books to your bank statements. If there are discrepancies, you need to find and fix them before you close out the year.

If you're behind on reconciliations, start here. Nothing else on this list matters if your underlying data isn't accurate.

Go through your transactions for the year and make sure everything is categorized correctly. Common issues to look for:

• Transactions sitting in "uncategorized" or "ask my accountant"
• Personal expenses that accidentally went through the business account
• Business expenses paid from a personal account that haven't been recorded
• Duplicate transactions
• Transactions recorded in the wrong account

Correct categorization is what turns your bank data into useful financial information — and it's what determines which expenses are deductible.

Pull a report of all outstanding invoices. For each one, ask:

• Is this invoice still valid?
• Has the client paid and the payment just wasn't recorded?
• Is this a bad debt that needs to be written off?

Outstanding invoices inflate your revenue on paper. If you know a client isn't going to pay, writing off the bad debt before year-end can reduce your taxable income.

Also: if you have clients who owe you money, now is a good time to follow up. Year-end is a natural prompt for clients to settle outstanding balances.

What do you owe vendors and suppliers? Make sure all bills are recorded, even if they haven't been paid yet. If you're on an accrual basis, expenses are recorded when incurred, not when paid.

Also check for any bills you've paid that haven't been recorded in your books.

If you paid any contractors or freelancers $600 or more during the year, you're required to issue them a 1099-NEC by January 31.

Now is the time to:

• Pull a list of all contractors you paid during the year
• Verify you have a W-9 on file for each one
• Confirm the payment amounts are accurate in your books

Missing or incorrect 1099s can result in IRS penalties. Get this right before the deadline.

If your business sells physical products, you need to count your inventory at year-end. Your ending inventory balance affects your cost of goods sold — and therefore your taxable income.

Do a physical count and compare it to what your books show. Investigate any significant discrepancies.

Did you buy any major equipment, vehicles, or other assets during the year? These need to be recorded as assets and depreciated over time — not expensed all at once (unless you're using Section 179 or bonus depreciation).

Work with your CPA to determine the right treatment for any significant purchases. Your bookkeeper should have these assets recorded correctly in your books.

If you have employees, make sure your payroll records match your books. Your total wages paid, payroll taxes withheld, and employer tax contributions should all reconcile to your payroll reports.

W-2s are due to employees by January 31. Make sure your payroll data is accurate before that deadline.

Pull a year-to-date profit and loss statement and review it carefully. Ask yourself:

• Does this look right based on how the year felt?
• Are there any categories that seem unusually high or low?
• Are there large transactions that need explanation?

If something looks off, investigate it now — not in April when your CPA is asking questions.

This is the most important item on the list. Your CPA can only help you with tax planning if they have time to act. Once December 31 passes, your options narrow significantly.

A year-end meeting with your CPA might cover:

• Whether to accelerate or defer income
• Whether to make any last-minute deductible purchases
• Retirement contribution strategies
• Entity structure considerations
• Estimated tax payments

In Texas, there's no state income tax — but federal planning still matters, and franchise tax applies to many business structures. Make sure your CPA has current, accurate financials to work from.

Make sure your QuickBooks Online data is backed up and that you have copies of all supporting documents — receipts, invoices, bank statements, contracts. The IRS can audit returns up to three years back (six years in some cases). Keep records accordingly.

Once the year is closed, take a few minutes to set up for the year ahead:

• Review your chart of accounts and make any needed adjustments
• Set financial goals for the new year
• Schedule monthly bookkeeping check-ins so you're not in this same position next December
• Consider whether your current bookkeeping system is working for you

Texas franchise tax: If your business is structured as an LLC, corporation, or partnership in Texas, you may owe franchise tax. The annual report is due May 15. Make sure your bookkeeper and CPA are aligned on this.

Sales tax: If you collect sales tax in Houston (8.25%), make sure all sales tax collected is properly recorded and remitted. Year-end is a good time to verify your sales tax liability account is accurate.

Hurricane season: Houston businesses know that weather events can disrupt operations and create unexpected expenses. Make sure any insurance claims, business interruption losses, or disaster-related expenses are properly documented and recorded.

The businesses that have the smoothest tax seasons are the ones that kept up with their books all year. If you're behind, the time to catch up is now — not in February when your CPA is asking for documents.

At On the Boox, we specialize in bookkeeping cleanup and year-end preparation for Houston small businesses. Whether you need to catch up on months of backlogged transactions or just want a second set of eyes on your year-end books, we're here to help.

Get a free book review and consultation — we'll tell you exactly where your books stand and what needs to happen before year-end.