How to Avoid a Surprise Tax Bill in 2027: A Step-by-Step Guide for Business Owners

We’ve seen it happen too many times. A business owner walks into our Missoula office in March, confident their taxes will look similar to last year. Then we run the numbers.

The surprise tax bill hits like a gut punch. Sometimes it’s $15,000. Sometimes it’s $40,000. And the reaction is always the same: “Why didn’t anyone tell me this was coming?”

Here’s the truth: most surprise tax bills have nothing to do with complicated tax law. 

They happen because no one looked ahead. No one adjusted. No one planned while there was still time to do something about it.

The good news? Here’s how to avoid surprise tax bill with a handful of proactive steps. We’re going to walk you through exactly how to do that.

Step 1: Run a Mid-Year Tax Projection (Don’t Wait Until December)

The single biggest mistake we see? Waiting until tax season to figure out what you owe.

By then, the year is over. Your income is locked in. Your deductions are what they are. There’s nothing left to adjust.

Instead, run a tax projection in June or July. This gives you a snapshot of where you’ll land if nothing changes. And more importantly, it gives you six months to make moves that actually matter.

Let’s look at an example. One of our clients runs a med spa in Missoula. In July 2024, we projected she’d owe $32,000 more than she expected. She had time to adjust her quarterly estimated payments, prepay some expenses, and explore equipment purchases that qualified for bonus depreciation. By December, the surprise was gone.

If she’d waited until April 2027 to find out? She would’ve been scrambling to cover a bill she didn’t budget for.

How to Do This

Pull your profit and loss statement through June. Estimate your income for the rest of the year based on what you know about upcoming projects, contracts, or seasonal trends. Then calculate your estimated tax liability.

If math isn’t your thing, this is exactly what proactive tax planning looks like. We do this for our clients every quarter so they’re never caught off guard.

Step 2: Understand the QBI Deduction Phase-Out (It’s a Bigger Deal Than You Think)

If you run an LLC, S corporation, partnership, or sole proprietorship, you probably qualify for the Qualified Business Income (QBI) deduction. This lets you deduct up to 20 percent of your business income.

But here’s the catch: the deduction starts to phase out once your income crosses certain thresholds. For 2026, that’s around $278,000 if you’re single or $556,000 if you’re married filing jointly.

Cross that line without planning, and you lose thousands of dollars in deductions. The tax increase can be significant, and it sneaks up on business owners who have a good year without realizing the QBI implications.

We’ve worked with business owners who crossed the threshold by $10,000 and lost $15,000 in deductions. That’s a painful trade.

How to Plan for This

Track your income throughout the year. If you’re approaching the phase-out range, talk to your accountant about strategies to manage your taxable income. Retirement contributions, equipment purchases, and timing of income can all play a role.

The key is knowing where you stand before the year ends. According to Inc., business owners who cross these thresholds without planning face surprise tax increases of thousands of dollars.

Step 3: Adjust Your Estimated Tax Payments Quarterly (Not Annually)

Here’s a common scenario: your business has a strong Q2. Revenue jumps 30 percent compared to last year. But your estimated tax payments stay the same because you set them back in January based on last year’s income.

By the time you file your return, you’re hit with an underpayment penalty and a big balance due.

The fix is simple: adjust your estimated payments every quarter based on your actual income. If you’re having a better year than expected, increase your payments. If things slow down, you can dial them back.

How to Do This

Review your profit and loss statement at the end of each quarter. Calculate your estimated tax liability for the year based on your year-to-date income. Then adjust your next estimated payment to stay on track.

This is one of those things that sounds tedious but saves you from scrambling in April. And if you’re working with Missoula accountants who stay in touch throughout the year, they’ll handle this for you.

Step 4: Take Advantage of 100% Bonus Depreciation (While It’s Still Here)

One of the biggest tax-saving opportunities available right now is 100% bonus depreciation. This lets you deduct the full cost of qualifying business property in the year you buy it, instead of spreading the deduction over several years.

The One Big Beautiful Bill Act permanently restored this deduction for most qualifying property bought and put into use after January 19, 2025.

Let’s say you’re planning to buy $50,000 worth of equipment for your business. If you buy it in December instead of waiting until January, you can deduct the full $50,000 this year. That’s an immediate tax savings of $10,000 to $15,000, depending on your tax bracket.

We’ve seen business owners miss this opportunity simply because they didn’t realize the timing mattered.

How to Use This

If you’re planning any equipment purchases, software investments, or vehicle upgrades, talk to your accountant before you buy. Make sure the purchase qualifies for bonus depreciation and that the timing makes sense for your tax situation.

This is where strategic planning pays off. You’re making purchases you need anyway. You’re just timing them to maximize your tax benefit.

Step 5: Track the Social Security Wage Cap If You’re an S-Corp Owner

If you own an S corporation and pay yourself a salary, you need to know about the Social Security wage cap. For 2026, that cap is $184,500.

Wages up to that amount are subject to Social Security tax. Once you hit the cap, you stop paying Social Security tax on additional wages.

This matters because S-corp owners need to pay themselves a reasonable salary. But if you’re not tracking the wage cap throughout the year, you might overpay payroll taxes or underpay your salary and trigger IRS scrutiny.

How to Handle This

Work with your accountant to set a reasonable salary at the beginning of the year. Then monitor your year-to-date wages to make sure you’re on track. If your income is higher than expected, you might need to adjust your salary mid-year.

This is another area where quarterly check-ins make a difference. You’re not guessing. You’re adjusting based on real data.

Step 6: Stay Ahead of the New 1099 Reporting Thresholds

Starting in 2026, the threshold for issuing 1099 forms increases from $600 to $2,000. This means you won’t need to issue 1099s to independent contractors unless you pay them $2,000 or more during the year.

This simplifies reporting, but it also means you need to update your accounting processes. If you’re still tracking every contractor payment over $600, you’re doing more work than necessary.

How to Prepare

Update your accounting software to reflect the new threshold. Make sure your bookkeeper or accountant knows about the change. And if you’re using monthly accounting services, this should already be handled for you.

The goal is to stay compliant without creating unnecessary administrative work.

The Real Reason Business Owners Get Surprised

After working with hundreds of business owners, we’ve noticed a pattern. The ones who get hit with surprise tax bills aren’t missing complex strategies or obscure deductions.

They’re missing regular check-ins. They’re making decisions without knowing the tax implications. They’re waiting until tax season to think about taxes.

The business owners who avoid surprises? They’re doing the opposite. They’re running projections quarterly. They’re adjusting estimated payments based on actual income. They’re talking to their accountant before making big financial decisions.

It’s not complicated. It’s just proactive.

What Certainty Looks Like in 2026

For the first time in years, business owners have something valuable: certainty. The One Big Beautiful Bill delivered clarity on tax provisions that have been expiring and changing with each administration.

You can now make long-term strategic decisions without worrying about provisions sunsetting or tax rates shifting. That stability matters when you’re planning growth, hiring, or making significant investments.

But certainty in tax law doesn’t mean you can set it and forget it. Your business changes. Your income fluctuates. Your opportunities shift.

The planning still needs to happen throughout the year.

How We Help Business Owners Avoid Surprises

At Elevated Tax, we don’t wait until April to talk about taxes. We stay in touch throughout the year because that’s when the planning actually matters.

We run quarterly projections, so you know where you stand. We adjust estimated payments based on your actual income. We identify tax-saving opportunities before the year ends. And we help you make financial decisions with the full picture in front of you.

That’s what proactive tax planning looks like. Fewer surprises. Better decisions. More money stays in your business.

If you’re tired of getting blindsided by tax bills you didn’t see coming, let’s talk. A short conversation is usually enough to figure out where the gaps are and what we can do about them.

Book your introductory call today.

We’ll walk through your situation and show you what year-round tax planning actually looks like.

If you found this helpful, you might also like our article on proactive tax strategies for business owners. It digs deeper into the planning process and shows you how to turn tax season from a stressful scramble into a non-event.

Until next time! 

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