Q1 Is Over — Here Is the Tax Planning Checklist Every Business Owner Should Run Right Now

Tax Day has passed. Most business owners close the laptop and do not think about taxes again until next March. That is exactly why they end up in the same position every year: scrambling, surprised, and paying more than they should.

The window right after tax season is one of the best times to do real planning. You have fresh numbers from last year, Q1 2026 results to look at, and nine months left to make decisions that will affect what you owe next April.

Here is the checklist every business owner should run right now.

1. Review Your Q1 2026 Results Against Your Projections

Before you do anything else, look at how Q1 went compared to what you expected. Revenue, expenses, profit margin: how does it line up?

If Q1 came in higher than expected, your estimated tax payments may not be enough to cover what you will owe. If it came in lower, you may have room to adjust. Either way, you need accurate numbers to make good decisions for the rest of the year.

2. Make Sure Your Q1 Estimated Tax Payment Was Made

The first quarterly estimated tax payment for 2026 was due on April 15. If you are self-employed, own an S-Corp, or have business income without withholding, you are generally required to make these payments if you expect to owe $1,000 or more when your return is filed.

Missing them results in an underpayment penalty when you file next year, even if you pay the full balance at that time. The remaining 2026 estimated tax deadlines are June 15, September 15, and January 15, 2027.

3. Evaluate Your Business Entity Structure

The structure you are using right now was probably set up when your business was a different size. It may not be the most tax-efficient option for where you are today.

A sole proprietor with growing revenue may save significantly by electing S-Corp status, which allows you to take a portion of your income as distributions rather than wages and reduce self-employment tax exposure. The S-Corp election deadline for the current tax year is generally March 15, but planning now means you are positioned to act at the beginning of 2027.

The right structure depends on your revenue, how you pay yourself, your industry, and your growth plans. This is worth reviewing with a CPA every year.

4. Review Your Owner Compensation Strategy

If you own an S-Corp, how much you pay yourself in salary versus distributions directly affects your payroll tax liability. Pay yourself too little and you risk IRS scrutiny for not taking a reasonable salary. Pay yourself too much and you are overpaying payroll taxes.

A CPA can help you set a compensation level that is both defensible and tax-efficient based on your actual profitability and your role in the business.

5. Plan Your 2026 Retirement Contributions

The deadline to contribute to an IRA or HSA for the 2025 tax year was April 15. That window is now closed.

But your 2026 planning window is fully open. Whether you have a Solo 401(k), SEP IRA, or a company retirement plan, set your contribution targets now. Retirement contributions reduce your taxable income, and the earlier you plan them, the more flexibility you have.

One important note: Solo 401(k) plans must be established before December 31 of the year you want to make contributions. If you do not have a retirement plan yet, do not wait until year-end.

6. Make Sure Your Books Are Current

If your books are six weeks behind, your financial picture is already outdated. Clean, current books are the foundation of everything else on this list. You cannot make accurate estimated tax payments without them. You cannot evaluate your entity structure without them. You cannot catch problems before they compound.

If your books are behind, fixing that in April is far less painful than fixing it in March of next year.

7. Plan Your Q2 Cash Flow

For construction companies especially, cash flow planning is not optional. You can have a full job pipeline and still run into problems if your billing cycle does not match your cost cycle.

Map out your expected income and expenses for Q2. Identify any months where cash might get tight. Make sure your job cost reports are current and your billing is keeping pace with work completed.

8. Schedule a Mid-Year Strategy Conversation With Your CPA

The decisions you make in the next few months have a direct impact on what you owe next April. Most of the strategies that reduce your tax bill have to be in place before December 31. Once January arrives, your options are limited.

A mid-year check-in covering your year-to-date numbers, projected annual income, and any planning opportunities is one of the highest-return conversations you can have as a business owner.

At Xtrategist CPA, we work with business owners and construction companies in Atlanta year-round, not just during tax season. Book a Free Consultation at xtrategist.com