Mid-Year Tax Check-In: 5 Things Every Self-Employed Person Should Review by June

It's May 8, 2026. We're four months and one tax filing deep into the year. The W-2 employees you know are basically done with taxes until April. But you're self-employed — which means your tax year never really stops. The decisions you make in the next eight weeks will determine whether April 2027 is a peaceful filing or a four-figure surprise.

The good news: it's still spring. There's plenty of time to fix what's drifting and lock in what's working. The bad news: most self-employed people skip the mid-year review entirely and only look at the numbers when their accountant asks for them in February — at which point most of the corrective levers are gone.

Here are the five mid-year reviews every self-employed person should do before June. Block out 90 minutes total, do them all this week, and you'll move the needle on next year's return more than any single tax-filing trick can.

1. Are You On Track for Quarterly Estimated Tax Payments?

The IRS requires anyone expecting to owe more than $1,000 in federal taxes to make quarterly estimated payments. The 2026 deadlines are April 15, June 16, September 15, and January 15, 2027. If you missed April or only paid a token amount because cash was tight, you're already behind — and the penalties compound through the year.

Here's the calculation that matters: take your year-to-date net business income (revenue minus expenses), multiply by 0.30, and compare that to what you've actually paid in estimated taxes so far. The 30% covers federal income tax (around 12-22% depending on your bracket) plus self-employment tax (15.3%). If your year-to-date payments are below 30% of your year-to-date net income, you're behind. The June 16 deadline is the moment to catch up.

The simplest way to avoid penalties for the rest of the year: pay quarterly using the "safe harbor" rule — total estimated payments equal to either 100% of last year's tax bill (110% if you earned over $150K) divided into four. This protects you from underpayment penalties even if your 2026 income comes in higher than expected.

For the full breakdown of how to calculate, see our quarterly estimated tax payments guide.

2. Is Your Mileage Log Audit-Ready Right Now?

Your mileage deduction is probably the largest single deduction on your Schedule C. At the 2026 IRS rate of $0.725 per mile, even a modest 18,000 business miles is $13,050 in deductions. For a self-employed contractor or full-time gig driver hitting 30,000+ miles, the deduction can exceed $20,000.

But the IRS only credits miles you can prove. And the proof bar isn't "I drove a lot" or "here's a number my accountant came up with." The proof bar is a contemporaneous mileage log — date, starting and ending location, miles driven, and business purpose for every trip. If you've been winging it for the first four months of the year, now is the moment to switch systems and make the rest of the year audit-proof.

Specifically, ask yourself:

• Could I produce a complete log of every business trip I've made since January 1?
• Does each entry have all four required fields (date, locations, miles, purpose)?
• Was the log recorded at or near the time of the trip — not reconstructed from memory?

If any answer is "no," your mileage deduction is at risk. Even one of those answers being "no" can give an IRS auditor grounds to disallow your entire mileage deduction — not just the questionable trips. The fix: switch to an automatic GPS-based mileage tracker today, and accept that the first four months may be reduced to a best-estimate. Going forward, every trip is captured automatically, dated, located, and contemporaneous.

For the deeper IRS rules, see our IRS mileage log requirements guide.

3. Are Your Year-to-Date Numbers Real, or Just Vibes?

Pull up your actual P&L for January through April 2026. Not what you think you earned. Not what your bank balance suggests. The actual numbers — revenue, every expense category, and net profit by month.

If you can't produce that document in the next 15 minutes, that's the first problem. Self-employed professionals running on "vibes-based" finances tend to have three predictable problems by year-end: they over-spend in categories they didn't realize were eating margin, they under-pay quarterly taxes because they don't know their real net income, and they enter tax filing with three months of receipts crammed into a shoebox instead of categorized records.

The mid-year review is the moment to fix this. Set up — or clean up — a simple monthly P&L. Five categories minimum:

• Revenue by source (platform, customer type, or service line)
• Vehicle expenses (or mileage at the standard rate, whichever you'll use)
• Tools, equipment, and materials
• Insurance, licensing, and subscriptions
• Marketing, software, and other business expenses

Review the totals by month. Spot the categories that are creeping. Notice the months that surprised you. This 30-minute review tells you more about your business than any single financial metric. For a deeper dive on building one, see our profit and loss statement guide.

4. Have You Captured Every Deductible Expense So Far?

Most self-employed people miss between $1,500 and $4,000 in legitimate deductions every year — not from aggressive tax positions, but from forgotten receipts and uncategorized expenses. The mid-year review catches what year-end review never does.

Walk through your bank and credit card statements from January through April. For every business-related charge, ask: "Did this make it into my expense tracking system, with a receipt or note attached?" Common categories that get overlooked:

• Software subscriptions — apps, cloud storage, password managers, accounting tools
• Phone and internet — the business-use portion of your monthly bills
• Professional development — books, online courses, industry publications
• Banking fees — business account fees, payment processor fees, wire fees
• Vehicle expenses beyond mileage — parking, tolls, registration, even if you take the standard mileage deduction
• Home office expenses — if you have a dedicated workspace, a portion of utilities, internet, and rent qualifies
• Professional services — accountants, lawyers, consultants, contractors you hired
• Marketing and advertising — business cards, signage, online ads, web hosting

For each deductible expense missing a receipt, dig out the digital one (most banks let you download statements as PDFs that count) or note the date and amount in your records now while you can still remember the context. Doing this in May is a 30-minute task. Doing this in February for the prior year is hours of forensic accounting that often ends with "close enough."

If you also drive for one of the gig platforms, our platform-specific tax tips guide covers the platform-specific deductions that don't show up on standard checklists.

If you work as an independent caregiver or 1099 visiting nurse, the deductions worth double-checking are different — scrubs, PPE, client-care equipment, malpractice insurance, and a home office for charting and scheduling. Our caregiver tax deduction guide walks through all of them.

5. Are You On Track With Retirement Contributions?

Self-employed people have access to retirement accounts that W-2 employees can only dream of — Solo 401(k), SEP-IRA, and SIMPLE-IRA — with contribution limits that go far beyond what a corporate 401(k) allows. For 2026, you can contribute up to $70,000 to a Solo 401(k) (combining the employee and employer portions) if your business income supports it.

But the contributions only count for 2026 if they're made by the relevant deadline. For most self-employed accounts, you have until your tax filing deadline (April 15, 2027, or October 15 with extension) to fund the prior year's contribution. But the longer you wait, the more cash flow risk you take — and the less time the money has to grow tax-deferred.

The mid-year review is the moment to:

• Confirm your retirement account is open and funded for 2026 (or open one if you haven't yet)
• Calculate your year-to-date contribution capacity based on actual net income
• Set up automatic monthly contributions if you haven't already
• Project your full-year contribution target so you're not scrambling in January

Even modest contributions add up: $500/month into a Solo 401(k) for the rest of the year is $4,000 deductible from your 2026 taxes — a roughly $1,200 reduction in your tax bill at a 30% combined rate. And it's $4,000 growing for retirement instead of disappearing into the IRS general fund.

The Difference Between April Surprises and April Confidence

Self-employed people who are well-organized in April aren't smarter than the ones who scramble. They just review their numbers regularly during the year instead of all at once at the end. The mid-year check-in is the highest-leverage hour you'll spend on your business this month — it catches drift while the year is still salvageable, locks in good systems for the second half, and means tax season becomes a filing exercise instead of a panic. It's also perfect timing to get ahead of your summer driving deductions before peak season volume makes them easy to lose track of.

If you're building this habit for the first time, start small. Pick one of the five reviews above and do it this week. Add a second one next week. By June, you'll have a complete picture — and you'll be in better tax shape than 90% of self-employed professionals heading into Q3.

Disclaimer: This article is for informational purposes only and does not constitute tax or financial advice. Consult a qualified tax professional or financial advisor for guidance specific to your situation.

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