TMA Accounting Blog

What's a Business Owner Tax Preview?

Written by Julie Myers, CPA | August 07, 2025

Tax time shouldn’t feel like a surprise party that ends with the IRS handing you the bill.

But for many small business owners, that’s exactly what it is. Despite working hard all year, they often head into tax time unsure of what they’ll owe, or worse, hoping for a refund that never comes. That uncertainty can throw off cash flow, delay growth decisions, and turn a good year into a stressful one.

It doesn’t have to be that way.

A tax preview is a simple and powerful way to see your likely tax outcome before the end of the year, while there’s still time to make changes that count. It eliminates the guesswork from your tax situation and provides clarity for moving forward..

Instead of reacting to a tax bill months after the year ends, a tax preview helps you see what’s coming so you can take action. Whether that’s buying equipment, contributing to a retirement plan, adjusting your payroll withholdings, or setting aside cash for what’s ahead.

If you’ve ever been surprised by a tax bill or wished you’d made different decisions before the year closed, this article is for you.

Let’s take the mystery out of tax time.

What Is a Tax Preview and When Does It Happen?

A tax preview is a proactive tool for estimating your personal tax liability. It uses real numbers, including your business income, expenses, payroll data, and deductions, to estimate what your tax situation will look like before the end of the year. In other words, it gives you a sneak peek at your likely tax bill so you’re not flying blind.

It’s like getting your tax returns completed early, except with time still on the clock to change the outcome.

Why Does This Matter?

Because reacting to your taxes after December 31 is like trying to reroute a flight after you’ve already landed, it’s too late.

Here’s the truth: By the time your accountant is preparing your actual tax return in February or March, your opportunities for minimizing your taxes are practically gone. Most of the smart moves you could’ve made—like buying deductible equipment, making retirement contributions, or changing payroll withholding—are no longer on the table because the year is over.

That’s why a tax preview is so powerful. It’s your window of opportunity.

With a clear understanding of where your business stands before year-end, you can:

  • Avoid painful surprises in April
  • Free up cash now for future payments
  • Time major expenses for maximum tax savings
  • Know whether to adjust your payroll withholdings or quarterly tax payments
  • Consider whether to accelerate or delay income
  • Contribute to a SEP, IRA, or HSA while it still counts

It’s not about gaming the system. It’s about playing smart with the rules you’re already living by.

And let’s be honest, peace of mind is priceless. Business owners who think ahead about taxes don’t just sleep better at night. They make better, more confident financial decisions because they know what’s coming.

When Is It Done?

At TMA, we typically perform tax previews for our business owner clients during two key windows each year:

Mid-Year Preview (July–August)

This is an early checkpoint. It’s beneficial for business owners who have experienced big changes, such as growing revenue, hiring new staff, or purchasing equipment. If your business looks different than last year, this preview can help identify early tax implications.

We help business owners stay organized throughout the year. We have a simple financial statement each month that accurately shows your income and deductions for the current tax year (so far). Using this information about your year-to-date business income and payroll information to identify trends, estimate your trajectory, and detect any potential red flags early. This is only intended to be a rough estimate, but it gives us a solid baseline and helps update quarterly tax payments and cash planning for the fourth quarter and year-end.

Year-End Preview (October–December)

This is the most detailed and actionable version. It’s based on nearly a full year’s worth of activity and is timed perfectly to allow you to make decisions before the end of the year.

At this point, we’re not just spotting trends, we’re fine-tuning your tax position. We’ll look at:

  • Last-minute deductible purchases
  • Potential for owner bonuses
  • Retirement plan contributions
  •  Other opportunities for current-year tax savings

By December 31, you’ll know where you stand on taxes—no surprises.

What Does a Tax Preview Include?

Every tax preview is built from real, updated numbers, not just last year’s tax return. Our team gathers information from multiple sources to provide a comprehensive picture.

Key Components of a Tax Preview:

  • Your business income to date
  • Your current payroll details, including YTD W-2 wages
  • Updates on personal or investment income that could impact your total tax situation
  • Changes in deductions (like more kids, new retirement contributions, charitable giving, etc.)
  • Any major shifts from last year (new equipment purchases, vehicles, changes in ownership)

Using this data, we can create a very educated guess about your tax situation before year-end. This avoids annoying tax surprises and allows you to plan ahead instead.

Why that’s a Big Deal

A tax preview isn’t just a theoretical exercise—it’s a powerful tool that helps you make smart, timely decisions that can reduce your taxes and boost your business.

Why Is a Tax Preview So Valuable for Small Business Owners?

Here’s the truth: tax surprises are expensive. And stressful. The last thing you want is to finish a great year in business only to discover a giant tax bill you weren’t ready for.

A tax preview gives you time to prepare and even change the outcome.

Real Examples of What a Tax Preview Might Help You Do:

  • Buy needed equipment before year-end to lower taxable income
  • Accelerate deductible expenses to reduce April’s tax bill
  • Consider delaying sales or other income if you're close to hitting a higher tax bracket
  • Increase retirement plan contributions (like an IRA or SEP) to lower taxes and save for the future
  • Update payroll withholdings so you're not over- or under-paying

This kind of insight is a game-changer.

It turns tax filing from a reaction into a roadmap. Instead of waiting until March or April to see what happened, you get to influence the result while you still have time to act.

What Happens Behind the Scenes?

So, how does this work on the back end?

At TMA, here’s what our team does to create a useful tax preview:

1. We Start with Last Year’s Return

Unless something major has changed, last year’s tax return is a solid starting point. It shows income sources, deduction categories, and filing status.

2. We Gather Current-Year Information:

  • Business income and expenses to date (via QuickBooks or your monthly reports)
  • Payroll data, including YTD earnings for owners and employees
  • Changes in deductions, dependents, or other personal info
  • Significant new investments, equipment, or other property

3. We Run Your Numbers through Tax Preview Software

The software helps determine your likely tax bracket, expected tax liability, and how much you’ve paid in so far (through payroll or estimated taxes). There’s usually a gap between the two; that’s where we focus our attention.

After we’ve analyzed the numbers, we will talk with you to explain the results. You’ll get clear explanations, not just tax lingo.

Common Questions and Misunderstandings

Some business owners have never heard of a tax preview, let alone seen one. So it’s natural to have questions. Here are some of the most common ones we hear:

“Is this the same as tax preparation?”

Nope. Tax prep occurs after the year ends and involves completing the necessary tax forms. A tax preview is forward-looking; it’s designed to help you make smarter choices before it’s too late.

“Will this tell me the exact amount of my refund or amount due?”

Before the year ends, it’s nearly impossible to predict exactly what your tax bill (or refund) will be. The accuracy of our estimate depends on how much of the year’s data we already have (the more, the better) and how much variability there is in your income and expenses over the remaining part of the year.

“What if I can’t afford to pay a big tax bill?”

This is why a preview is so important! It gives you time to plan ahead:

  • You may want to make purchases now to lower your bill.
  • You can increase withholdings or set aside cash gradually.
  • You can explore tax-saving options, such as HSAs, IRAs, or charitable giving.

“Do I need this if I had a good year?”

If your year was profitable, you especially need a tax preview. More profit = more taxes. A preview helps you visualize everything, so your success doesn’t come with a painful surprise.

Get Ahead, Stay Calm, and Be Prepared

A tax preview is one of the simplest, most powerful tools you can use as a business owner. It helps you:

  • Avoid tax-time surprises
  • Make smart year-end purchases or investments
  • Take advantage of deductions you might otherwise miss

At TMA Accounting, we believe your business shouldn’t be held back by fear, guesswork, or confusing tax rules. That’s why we offer tax previews as part of our proactive approach to accounting.

You’ve worked hard to grow your business. We’re here to help you keep more of what you’ve earned—and to build a financial support system that helps you achieve your goals.

If you’re not working with us yet, we’d love to show you how tax previews can make your business stronger and your life less stressful. Schedule a meeting to chat with us today!