Tax planning

Year-End Tax Planning Checklist for Small Business 2026

Updated October 1, 2026

Before the year ends, you can still tidy your books, check your profit so far, and plan your last estimated payment, which is due January 15, 2027. Some retirement plan choices have their own deadlines, so it helps to look at them now instead of in April.

Why the last quarter matters

Most tax decisions for 2026 are already made. What you earned and spent from January to now is locked in. But the last three months still give you room to act, and small steps now can save you a scramble in early 2027.

Think of this as a tune-up, not a rescue. You are looking for three things: a clear profit number, a plan for the tax on that profit, and clean records so your return can be prepared without guessing.

Step one: find out where your profit stands

You cannot plan around a number you do not know. Pull your income and expenses from January through September and see what is left. Then estimate the last quarter. That gives you a rough full-year profit.

If your books are behind, this is the time to catch up. A profit estimate built on missing months is only a guess. If you want help keeping this current all year, look at our monthly bookkeeping service.

Match every bank and card account to your records.
Sort personal spending out of business accounts.
Save receipts for anything you plan to deduct.
List unpaid invoices you are owed and bills you owe.

If a number looks off, flag it now. A wrong category in October is a five minute fix. The same mistake in April can mean an hour of digging, and it may cost you a deduction you cannot prove. Take screenshots of anything you cannot get again later, such as an online statement that is only kept for a limited time.

Get a quote for your self-employed return

A real preparer reviews and signs your return. You see the written quote before we start.

Get my quote

Step two: check your estimated taxes

If you are self-employed, no one is withholding tax from your income. The IRS says that individuals generally have to make estimated tax payments if they expect to owe $1,000 or more when their return is filed. The last payment for 2026 is due January 15, 2027. If a due date lands on a weekend or legal holiday, the payment is on time if you make it on the next day that is not a Saturday, Sunday or holiday.

Look at what you have paid so far this year against what you expect to owe. If you are short, you can make a larger payment now instead of waiting. We cover the rules in detail in our Q4 estimated tax guide and in this overview of quarterly payments.

A rough method works fine here. Take your expected profit for the year, think about what share goes to tax, and compare that with what you have already paid. If the gap is large, a bigger payment now beats a big bill later. The self-employment part is easy to forget, so remember it when you set money aside.

Step three: look at retirement plan deadlines

Retirement plans are one of the few ways a self-employed person can act after the year ends, but only for certain plan types. The IRS and the Department of Labor both say a SEP plan can be set up for a year as late as the due date, including extensions, of the business's income tax return for that year. A SIMPLE IRA plan is different. The IRS says it can be set up any time from January 1 through October 1, and the Department of Labor says an employer may initially set one up as late as October 1.

That October 1 date is here or just behind us for 2026, so for most people a new SIMPLE IRA is now a 2027 decision. If you want a retirement plan for 2026, a SEP is one type that can still be set up after the year ends. Contribution limits change each year, so check the current figure at irs.gov or with a qualified financial professional before you commit. We prepare tax returns and do not give investment advice.

Also ask whether a retirement plan makes sense for your cash flow at all. A deduction is only useful if you can afford to put the money away. It is a real decision, not a trick, because that money is generally meant to stay put until retirement.

Step four: line up your contractor paperwork

If you pay independent contractors, January comes fast. The IRS says Form 1099-NEC must be filed with the IRS and provided to recipients by January 31, and that a due date falling on a weekend moves to the next business day. January 31, 2027 is a Sunday, so for 2026 payments the date becomes Monday, February 1, 2027. Payments made after 2025 have a higher reporting threshold of $2,000, so check what each contractor was paid in 2026.

Collect a W-9 from every contractor you have not collected one from.
Confirm each contractor's legal name, address and taxpayer number.
Total up payments by person, not by month.

Our post on 1099-NEC for contractors walks through this in more detail.

Who this fits and what to gather

This checklist fits sole proprietors, single-member LLC owners, partners, and small S corporation owners. It also helps side-hustlers who had a good year and expect to owe. If your income is only W-2 wages with no side income, most of this does not apply to you.

Gather these before you sit down to plan:

Profit and loss report through September
Last year's tax return
Estimated payments made so far, with dates
Mileage log and major purchases
Contractor payment totals

Small habits that pay off in January

The best year-end plan is boring. A few steady habits beat a last-minute hunt for tricks.

Pay attention to timing. Expenses count for the year you pay them in most small businesses, so confirm which year an invoice belongs to before you file it away.
Do not buy something you do not need only for a deduction. Spending a dollar to save a fraction of a dollar in tax leaves you behind.
Set a date in early January to close the books for 2026, and put it on your calendar now.
Ask your preparer what they need and by when, so nothing is left for the last week.

When you are ready, our tax deadlines guide shows the dates around filing season in one place.

FAQ

Is it too late to lower my 2026 taxes?

Not entirely. Some choices, like certain retirement plan setups, still have deadlines after December 31. Your business expenses have to be real and paid for the right year, so the best move is good records and a plan for your final payment.

Do I have to make a fourth quarter estimated payment?

Not everyone does. If you expect to owe $1,000 or more when you file, the IRS generally expects estimated payments. If you have paid enough through withholding or earlier payments, you may be covered.

What is the deadline for filing 1099-NEC forms?

The IRS says the deadline to file Form 1099-NEC with the IRS and give copies to recipients is January 31, and a weekend date moves to the next business day. In 2027, January 31 is a Sunday, so the deadline is Monday, February 1. Start collecting W-9 forms and payment totals now.

Can a preparer help me with year-end planning?

We prepare your return and can help you organize your numbers before the year ends. We do not give legal advice, and we do not represent you before the IRS.

Sources

Keep reading

Serving Longwood, Seminole County and clients in all 50 states remotely. See where we work.

General information, not tax advice for your specific situation. Rules can change, and a human preparer reviews your facts before any return is filed. Zero Fuss Taxes is a PTIN-holding tax preparation firm. We are not a CPA firm, enrolled agents or attorneys.

Start My Tax Return Call 689-331-5723