When most business owners think about year-end financial planning, they picture December.
Unfortunately, waiting until the last few weeks of the year often creates unnecessary stress. By then, schedules are busy, holidays are approaching, and there is limited time to address any issues that surface.
That’s why September is actually one of the best times to start preparing for year-end.
With several months still remaining in the year, you have enough time to clean up your books, review your financial performance, and address any concerns before they become last-minute problems.
Review Your Bookkeeping
Before year-end arrives, it’s important to make sure your bookkeeping is up to date and accurate.
Take some time to review:
- Bank account reconciliations
- Credit card reconciliations
- Loan balances
- Uncategorized transactions
- Owner contributions and owner draws
- Accounts receivable and accounts payable balances
The goal is to identify any issues now rather than discovering them during tax season.
Even small bookkeeping errors can create confusion later if they aren’t addressed promptly.
Clean Up Outstanding Issues
Most businesses accumulate a few loose ends throughout the year.
Maybe there are transactions that still need receipts attached. Perhaps there are charges you haven’t identified yet, or old balances that no longer look correct.
September is a great time to clean up:
- Missing receipts
- Uncategorized expenses
- Duplicate transactions
- Old unreconciled items
- Outstanding bookkeeping questions
Addressing these items now will make the final months of the year much smoother.
Make Life Easier for Your Tax Preparer
One of the biggest benefits of preparing early is reducing the stress of tax season.
While your tax preparer handles the tax return itself, clean and organized books help ensure they have accurate information to work with.
By reviewing your financial records before year-end, you can:
- Reduce last-minute scrambling
- Minimize questions and corrections
- Improve the accuracy of your financial reports
- Enter tax season with greater confidence
The more organized your records are, the smoother the process tends to be for everyone involved.
Review Your Year-to-Date Financial Performance
September is also an excellent checkpoint for evaluating how the year is going.
Pull up your financial reports and ask yourself:
- Is revenue tracking where you expected?
- Are profits meeting your goals?
- Have expenses increased more than anticipated?
- Is cash flow healthy?
- Are there any concerning trends developing?
Looking at your numbers now gives you time to make adjustments before the year ends.
For example, you may identify areas where expenses can be reduced, pricing needs to be adjusted, or cash flow requires additional attention.
Look Ahead to the Final Quarter
The final months of the year often move quickly.
By preparing in September, you can approach the fourth quarter with a clearer understanding of where your business stands and what priorities deserve your attention.
Rather than reacting to problems as they arise, you’ll be in a stronger position to make intentional decisions based on accurate financial information.
A Simple September Year-End Checklist
Use this checklist to get started:
✓ Reconcile all bank and credit card accounts
✓ Review uncategorized transactions
✓ Gather missing receipts and documentation
✓ Review your Profit & Loss statement
✓ Review your Balance Sheet
✓ Evaluate year-to-date performance
✓ Identify any bookkeeping cleanup items
✓ Create a plan for the final quarter
Start Early and Reduce Year-End Stress
Year-end preparation doesn’t have to wait until December.
In fact, September often provides the perfect opportunity to get ahead while there is still time to make meaningful improvements.
A few hours spent reviewing your financial records now can help reduce stress, improve accuracy, and make the transition into tax season much smoother.
Your future self, and your tax preparer, will thank you.

Katie is the founder of Rooted Accounting & CFO Solutions in Tualatin, Oregon, where she provides monthly bookkeeping and strategic financial advisory to service-based businesses across the Portland metro area, with a special focus on women-owned businesses, creative entrepreneurs, wellness providers, and trades. Before starting Rooted, she spent 14+ years in corporate finance at Nike and Disney.



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