5 Tax Mistakes Coeur d'Alene Small Business Owners Make Every Year (And How to Fix Them)

If you own a small business in Coeur d'Alene or the greater Spokane area, chances are you're leaving money on the table every single year. Not because you're doing anything wrong — but because nobody ever showed you what right looks like. As a CPA who works exclusively with small business owners in North Idaho and Eastern Washington, I see the same mistakes over and over. Here are the five most expensive ones — and what to do about them.

Mistake #1: Only Thinking About Taxes in April

By the time tax season rolls around, most of the opportunities to save money are already gone. Tax planning isn't something you do in April — it's something you do in June, September, and December.

The business owners who pay the least in taxes aren't the ones with the best accountant at filing time. They're the ones making strategic decisions throughout the year: timing income and expenses, maximizing retirement contributions, and structuring their business to minimize what they owe.

The fix: Work with a CPA who does proactive year-round planning, not just annual filing.

Mistake #2: Running as a Sole Proprietor When You Should Be an S-Corp

This is the single biggest tax mistake I see from business owners generating $80,000 or more in profit. As a sole proprietor or single-member LLC, you pay self-employment tax (15.3%) on every dollar of profit. Electing S-Corp status and paying yourself a reasonable salary can eliminate self-employment tax on a significant portion of your income.

For a business owner making $150,000 in profit, this single strategy can save $10,000–$15,000 per year.

The fix: Talk to a CPA about whether an S-Corp election makes sense for your situation. The math usually works once you're consistently profitable above $80K.

Mistake #3: Mixing Personal and Business Finances

If your business income is running through your personal bank account — or you're paying personal expenses from your business account — you're making your bookkeeper's life miserable and your tax situation worse.

Commingled finances make it nearly impossible to track deductible expenses accurately, which means you're almost certainly missing deductions you're entitled to. It also creates audit risk.

The fix: Open a dedicated business checking account and a business credit card. Use them exclusively for business. It takes 30 minutes to set up and saves hours of cleanup every year.

Mistake #4: Not Tracking Mileage

If you drive for business — meeting clients, visiting job sites, running to the supply store — every mile is worth 70 cents in deductions (2025 IRS standard mileage rate). Most business owners either don't track it at all or try to reconstruct it at year-end from memory, which never works.

A plumber doing 15,000 business miles per year is leaving over $10,000 in deductions on the table if they're not tracking.

The fix: Download a mileage tracking app like MileIQ or Everlance. Set it to auto-track. Takes 30 seconds to set up and costs a fraction of what those deductions are worth.

Mistake #5: Using a CPA Who Doesn't Specialize in Small Business

Not all CPAs are the same. A CPA who primarily does personal returns or works with large corporations is going to miss the deductions and strategies that matter most to small business owners — home office deductions, vehicle expenses, Section 179 equipment expensing, qualified business income deductions, and more.

Small business tax is a specialty. The questions your CPA asks you (or doesn't ask) make a significant difference in what you pay.

The fix: Work with a CPA who focuses specifically on small business. Ask them directly: what percentage of your clients are small business owners? What proactive strategies do you typically implement for clients like me?

The Bottom Line

These five mistakes add up to real money — often $10,000 to $30,000 per year for established small business owners. The good news is every single one is fixable, and most don't require complicated strategies.

If you own a business in Coeur d'Alene, Post Falls, Spokane, or anywhere in North Idaho and you're not sure whether you're paying more than you should — let's talk.

I offer a free 30-minute strategy call where I'll give you an honest assessment of your situation and where the opportunities are. No pitch, no pressure. Just a straight conversation with a CPA who works with business owners like you every day.