Quarterly Estimated Taxes for Small Businesses | Tulsa Tax Tips 2025

Quarterly estimated taxes are one of the most overlooked responsibilities for small business owners. Missing payments or underpaying can lead to IRS penalties and cash flow headaches. This guide explains who needs to pay, when payments are due, and how Tulsa businesses can stay compliant. For personalized support, contact Keen’s Tax Service.

📅 Who Needs to Pay Estimated Taxes?

Generally, small business owners, freelancers, and contractors must pay estimated taxes if they expect to owe $1,000 or more in federal taxes after subtracting withholding and credits. Corporations must pay if they expect to owe $500 or more.

Learn more from the IRS on estimated taxes.

Unsure if you qualify? Contact Keen’s Tax Service for a quick review.

📊 Quarterly Deadlines for 2026

• Q1: April 15, 2026
• Q2: June 15, 2026
• Q3: September 15, 2026
• Q4: January 15, 2027

Check state requirements on the Oklahoma Tax Commission site.

Need reminders or help setting up payments? Contact Keen’s Tax Service.

💡 How to Calculate Estimated Taxes

Estimated taxes are based on your expected income, deductions, and credits for the year. Many small businesses use last year’s tax liability as a baseline, then adjust for growth or changes.

Best practices include:

• Use IRS Form 1040‑ES for individuals
• Review profit and loss statements quarterly
• Factor in seasonal income fluctuations
• Consult a tax professional for projections

Want help running accurate projections? Contact Keen’s Tax Service.

👥 Common Mistakes to Avoid

• Missing deadlines and incurring penalties
• Underestimating income, leading to underpayment
• Failing to adjust payments after a profitable quarter
• Not keeping records of payments made

Need a compliance check? Contact Keen’s Tax Service.

🕒 Preparing Early for 2026

Set aside funds monthly to cover estimated taxes. Automate payments where possible and keep documentation organized. Early preparation reduces stress and ensures compliance.

Want a customized tax calendar for your business? Contact Keen’s Tax Service.