Do You Know What You’ll Owe? Get a Tax Projection Before Year-End

By Paul Belshaw, MSCTA | Belshaw Accounting Tax and Advisory Services LLC — Established 1978

A busy year does not always tell you what your tax bill will look like.

Maybe your business earned more than expected. Maybe your household income changed. Maybe you have been making estimated payments based on last year's numbers and have not checked whether this year's picture is different.

A year-end tax projection estimates your full-year tax using current information and reasonable assumptions. It then helps you compare that estimate with withholding, estimated payments and other applicable credits to see what may remain to pay—or whether an overpayment is expected.

It is an estimate, not a completed tax return or a guarantee. For a small-business owner in Tarpon Springs, November is a useful time to ask the question while there is still time to review possible next steps before the year ends.

Understanding Your Tax Projection: Three Numbers to Know

“What will I owe?” can mean several things. A useful review separates:

1. Projected total tax: The estimate for the full year, based on the information and rules used.

2. Tax payments and applicable credits: Including withholding and estimated payments, with records showing what was actually paid and when.

3. Projected remaining balance or overpayment: The estimated difference after those items are taken into account.

   
   

These are related, but they are not interchangeable. A person can make tax payments throughout the year and still have a balance due. An estimate can also change as the final weeks of the year unfold. Ask the person preparing the projection to explain which number you are looking at and what assumptions sit behind it.

Bring current books, not just a bank balance

The business bank balance does not tell the whole income-tax story. Start with a current profit-and-loss report, a balance sheet and an explanation of which months and accounts have been reviewed. If the books are behind, identify the gaps.

You may need bookkeeping work before a projection can be useful, or an initial estimate may have to show clearly which information is provisional.

You can explore BATS's accounting and bookkeeping services if getting the records current is the first step. Do not assume the profit on a bookkeeping report equals taxable income or the amount of tax owed. The review needs to consider the accounting records alongside the relevant tax treatment.

Include the rest of the owner's tax picture

Business income is an important input, but it may not be the only one. Bring your most recent filed return, current pay statements where applicable, your estimated-payment history and information about other income or major changes. If you expect to file jointly, relevant spouse information belongs in the conversation too.

Tell your preparer about changes you already know about and changes you reasonably expect before year-end. Note which figures are confirmed and which are estimates. A projection based on a good October report can still need an update if November and December turn out differently.

Hypothetical example—not a client result: Two owners have similar bookkeeping profit. One household also has wages with federal withholding; the other has different income and payment history. Their remaining tax balances may differ. The lesson is to review each owner's full facts, not borrow another owner's estimated-payment amount.

Ask what needs review before the next payment or payroll

Federal income tax is generally paid during the year, rather than first becoming payable when a return is filed. A review may identify a need to revisit estimated payments or, where appropriate, wage withholding. IRS guidance explains estimated taxes and payment methods.

There is no one-size-fits-all extra payment or withholding amount. The appropriate calculation depends on the facts, amounts already paid, timing and applicable rules.

Do not assume sending an estimated payment late in the year automatically erases an earlier underpayment.

Payment-period rules and exceptions matter. Ask your tax professional to review timing as well as the expected total. If wage withholding is part of your situation, the IRS Tax Withholding Estimator may be useful for eligible users. It requires qualifying wages or pension/annuity withholding; it is not a universal tool for every business owner. Ask whether it fits your circumstances and confirm payroll processing time before relying on a change.

A penalty payment target is not the same as the final tax bill

You may hear an accountant discuss a “safe harbor.” That refers to rules used to assess underpayment exposure; it is not a promise that your final return will have no balance due. A review should distinguish the expected balance at filing from the amount and timing needed under applicable payment rules.

Higher-income and other special rules can change the analysis. Avoid relying on a percentage you heard from a friend without checking whether it applies to you. IRS Publication 505 provides the detailed rules. That distinction is one reason a projection can be useful even if you have faithfully sent the same estimated payment all year.

Turn the projection into a short action list

A projection is most useful when you understand what to do with it. Before ending the review, ask for answers to these questions:

• What information is still missing or estimated?

• What projected balance or range are we using to plan cash?

• Does a payment or withholding change need review, and who will handle it?

• Which planning decisions have deadlines or processing requirements?

• When should the estimate be updated?

A tax projection describes the likely picture. A planning review considers available choices and their business and cash-flow effects.

Buying something simply to claim a deduction is not automatically a sound business decision. BATS's business advisory and tax-planning services connect those conversations with the owner's broader decisions. The right scope depends on the engagement and your needs.

Begin before the calendar does the deciding

November is not a universal tax-projection deadline. It is a practical time to get records and questions together before holiday schedules and the final payrolls of the year make coordination harder. You do not need to know every technical question before calling. Start with your current records, your payment history and the changes you have experienced this year.

Business tax-return preparation reports the business's completed tax-year information. Planning before the year ends serves a different purpose: helping you understand the picture while decisions may still be available.

Frequently asked questions

Is a tax projection the same as my final return?

No. A projection uses the information and assumptions available now. The final return uses the completed year's information and applicable rules, so the result can differ.

Does a projection tell me the total tax or the amount still to pay?

Ask for both to be labeled. Projected full-year tax and the estimated balance after payments and applicable credits answer different questions.

What should I bring to a review?

Bring current business reports, your most recent filed return, relevant pay statements and a dated payment history. Include other income and major changes, plus relevant spouse information if filing jointly.

Can a late estimated payment automatically fix an earlier shortage?

No. Payment timing matters. Have your professional review the applicable periods and any exceptions rather than assuming a year-end payment removes earlier exposure.

If I meet a safe harbor, does that mean I will owe nothing at filing?

No. A penalty-related payment target and the final balance on your return are different. Ask your preparer to explain each.

Can we start if my bookkeeping is behind?

Yes, a conversation can identify missing records and the right sequence of work. Whether a useful preliminary projection is possible depends on the gaps; its assumptions and limits should be clear.

Let's review the picture before year-end

Belshaw Accounting works virtual-first with business owners across Greater Tampa Bay and beyond.

If you want to discuss a year-end tax projection and the information needed to prepare one, contact the BATS team.

Call: (727) 916-7410

Email: admin@belshawaccounting.com

Website: https://www.belshawaccounting.com

Use the secure document process provided by the team for sensitive financial records.

General educational information reviewed October 28, 2026. Individual and entity obligations differ; state taxes, special rules and relief may require separate review. A projection is an estimate, not a guarantee of tax liability, savings or penalty avoidance.