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Are You Making These 5 Common Mid-Year Tax Planning Mistakes? (And How to Fix Them Now)
- Susan Hagen
- Jul 8
- 5 min read
It’s June. The sun is out, the days are long, and the last thing you want to think about is the IRS. Most small business owners treat tax season like a once-a-year dentist appointment: something to be endured in April and then promptly forgotten until next spring.
But here’s the truth: April is for reporting what happened last year. June is for changing what happens this year.
Mid-year is the "golden hour" for your finances. It’s the halfway point where you have enough data to see how your year is shaping up, but still have enough time to pivot, save money, and avoid a massive tax bill surprise.
At Your Business Accountant, we see the same avoidable mistakes every year. If you find yourself nodding along to any of these, don't sweat it: we’re going to show you exactly how to fix them before the year-end clock runs out.
1. Treating the "Safe Harbor" as Your Final Plan
Many business owners rely on the "Safe Harbor" rule for their quarterly estimated payments. Essentially, if you pay 100% (or 110% for high earners) of what you owed last year, you won't get hit with underpayment penalties. It sounds like a great safety net, right?
The mistake is treating that safety net like a strategy.
If your business is having a banner year and your profits have doubled since 2025, paying based on last year’s numbers means you are going to owe a mountain of cash come April 2027. On the flip side, if your revenue has dipped, you might be sending the IRS interest-free loans that your business could really use for cash flow right now.
How to Fix It Now:
Stop guessing. Take thirty minutes to look at your year-to-date Profit & Loss statement. If you're using our monthly bookkeeping services, this report is already waiting for you.
Project your income for the rest of the year and recalculate your tax liability based on this year's reality. Adjust your Q3 and Q4 payments accordingly. It’s much better to pay a little more now than to realize in April that you don't have the cash to cover a five-figure tax bill.
2. Sticking With an Outdated Entity Structure
When you first started your business, you might have filed as a simple Sole Proprietorship or a Single-Member LLC. That was likely the right move then! But as your business grows, that structure might be costing you thousands in self-employment taxes.
One of the biggest mid-year mistakes is ignoring the "S-Corp tipping point." Generally, once your business reaches a certain level of profit (usually around $50k–$70k, depending on your location and industry), transitioning to an S-Corp can save you significant money by allowing you to take a portion of your income as a distribution rather than a salary subject to full payroll taxes.
How to Fix It Now:
Review your net profit. If you’re consistently clearing more than what a "reasonable salary" would be for your position, it’s time to have a conversation. You can’t wait until December 31st to make this change; payroll setups and elections take time. We help clients navigate this transition through our business success training, ensuring your entity actually fits the business you have today, not the one you had three years ago.
3. The "Commingling" Trap: Mixing Business and Personal Finances
We get it: life moves fast. You’re at the store, you grab office supplies and a gallon of milk, and you use whichever card you pull out first. Or maybe you personally paid for a new laptop for the business but never "got around" to reimbursing yourself from the business account.
This creates a nightmare for tax planning. When your personal and business expenses are mixed (commingled), your financial reports become inaccurate. You might think you're making a $5,000 profit, but after untangling the personal Amazon hauls, you realize you're actually making $8,000: meaning your tax estimate is wrong.
Worse, commingling can "pierce the corporate veil," potentially putting your personal assets at risk if your business is ever sued.
How to Fix It Now:
Draw a hard line in the sand today.
Separate Accounts: If you don't have separate business checking and credit cards, open them this week.
The Accountable Plan: If you’ve been paying for business stuff personally, set up an "Accountable Plan." This is a formal way for your business to reimburse you for expenses without it counting as taxable income to you.
Clean Up the Books: Use a tool like QuickBooks Online to categorize the mess. Our team can help you reconcile the last six months so you can start July with a clean slate.
4. Forgetting to Time Your Big Purchases
Are you planning on buying a new delivery van, upgrading your tech stack, or investing in heavy machinery this year? Many owners wait until the very last week of December to make these purchases, hoping for a "tax write-off."
The mistake here is ignoring 2026-specific depreciation rules. Bonus depreciation: the rule that allows you to deduct a huge chunk of an asset's cost in the first year: is often subject to phase-downs or changes. If you buy a piece of equipment in October but it isn't "placed in service" (meaning ready and available for use) until January, you can't claim it on your 2026 taxes.
How to Fix It Now:
Map out your "Capital Expenditures" (CapEx) for the rest of the year. If you know you need that new equipment, don't wait until the December rush when shipping delays might push your "placed in service" date into next year. Check our service pricing to see how a one-on-one strategy session can help you time these purchases to maximize your deductions while keeping your cash flow healthy.
5. Reactive Instead of Proactive Bookkeeping
The biggest mistake of all? Only looking at your books when it's time to pay the bills or do your taxes. Reactive bookkeeping means you're always looking in the rearview mirror. You can't make smart tax decisions if you don't know your numbers right now.
If you aren't reconciling your bank accounts monthly, you might be missing:
Recurring subscriptions you forgot to cancel.
Duplicate payments to vendors.
Tax deductions for meals and travel that you've forgotten the business purpose for.
How to Fix It Now:
Commit to a monthly "Money Date." Spend one hour a month (or hire us to do it for you!) reviewing your transactions. Use a receipt-scanning app to capture documentation the moment it happens.
By keeping your books clean through the summer, you’ll enter the fall with a clear picture of your profit. This allows you to make strategic moves: like increasing your retirement contributions or giving yourself a bonus: while there’s still time to influence your final tax number.
Ready to Take Control?
Tax planning doesn't have to be scary, and it definitely shouldn't be a once-a-year panic. By fixing these five common mistakes now, you're not just saving money on taxes: you're building a more stable, professional, and profitable business.
At Your Business Accountant, we’re more than just "tax people." We’re your partners in growth. Whether you need QuickBooks Online training to manage things yourself or want us to take the monthly bookkeeping off your plate entirely, we’re here to help you understand your numbers and grow with confidence.
Don't wait until December!Contact us today for a mid-year review and let’s make sure 2026 is your best financial year yet.
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