How to File Quarterly Estimated Taxes as a New Dental Practice
Learn the step-by-step process for filing quarterly estimated taxes as a new dental practice, including deadlines, calculations, and payment methods.
If you own a new dental practice, you’re likely considered self-employed or a pass-through entity owner, meaning you must pay taxes on income as you earn it, not once a year. The IRS requires quarterly estimated tax payments to cover income tax and self-employment tax (Social Security and Medicare). This guide walks you through the process, from calculating what you owe to making payments on time.
Why You Need to Pay Quarterly Estimated Taxes
When you’re an employee, your employer withholds taxes from each paycheck. As a practice owner, no one withholds for you. The IRS expects you to pay your tax liability in four installments throughout the year. If you don’t, you may face underpayment penalties, which are calculated based on the amount you owe and how long it’s been unpaid. For 2026, the federal short-term rate is around 8% per year, so penalties can add up quickly.
Step 1: Determine Your Tax Obligations
Your quarterly payments must cover:
- Federal income tax: Based on your taxable income after deductions and credits.
- Self-employment tax: 15.3% of your net earnings (12.4% for Social Security, 2.9% for Medicare). This is in addition to income tax.
- State taxes: Most states require quarterly estimated payments as well. Check your state’s tax agency for rates and deadlines.
For a new practice, your first year’s income may be unpredictable. You can use your prior year’s tax return as a baseline if you had one, or estimate based on your business plan and current cash flow.
Step 2: Calculate Your Estimated Tax Payments
To calculate your quarterly payments, you have two main methods:
Method A: Annualized Income Installment Method
This method is useful if your income varies throughout the year. You calculate your actual income for each quarter and pay tax on that amount. It requires more paperwork (Form 2210) but can avoid overpaying if you have slow months.
Method B: Regular Installment Method
Divide your total expected tax liability for the year by 4. This is simpler but can lead to underpayment if your income is higher later in the year.
Example calculation:
Let’s say you expect a net profit of $120,000 in 2026. Your self-employment tax is 15.3% on 92.35% of your net earnings (the IRS allows a deduction for the employer portion). That’s $120,000 x 0.9235 = $110,820. Self-employment tax = $110,820 x 0.153 = $16,955.46.
For federal income tax, assume you’re married filing jointly with a standard deduction of $29,200 (2026 estimate). Your taxable income is $120,000 - $29,200 = $90,800. The tax on that is roughly $14,800 (using 2026 brackets). Total federal liability = $16,955 + $14,800 = $31,755. Divide by 4 = $7,938.75 per quarter.
This is a simplified example. Use tax software or a CPA for accuracy.
Step 3: Know the Deadlines
For the 2026 tax year, the quarterly deadlines are:
| Quarter | Payment Due Date |
|---|---|
| Q1 (Jan 1 - Mar 31) | April 15, 2026 |
| Q2 (Apr 1 - May 31) | June 15, 2026 |
| Q3 (Jun 1 - Aug 31) | September 15, 2026 |
| Q4 (Sep 1 - Dec 31) | January 15, 2027 |
If a deadline falls on a weekend or holiday, the due date moves to the next business day.
Step 4: Make Your Payments
The IRS offers several ways to pay:
- Electronic Federal Tax Payment System (EFTPS): Free, secure, and you can schedule payments in advance. You must enroll first, which takes about a week.
- IRS Direct Pay: Free, allows you to pay directly from your bank account without enrollment. You’ll need your Social Security number or EIN.
- Credit/debit card: Convenient but fees apply (around 1.87% for debit, 2.89% for credit).
- Check or money order: Mail with Form 1040-ES voucher.
For state payments, check your state’s revenue department website for options.
Step 5: Track and Adjust Your Payments
Your income may change during the year. If you have a strong quarter, you may need to increase your next payment to avoid underpayment penalties. Conversely, if your income drops, you can reduce payments. Use Form 1040-ES to recalculate each quarter.
Common Mistakes to Avoid
- Forgetting state taxes: Many states require separate estimated payments. Don’t overlook them.
- Underpaying due to ignoring self-employment tax: This is a significant amount that new owners often miss.
- Missing deadlines: Set reminders in your calendar. The IRS charges penalties for late payments.
- Not keeping records: Track your income and expenses meticulously. This helps with accurate estimates and year-end filing.
FAQ
What if I don’t pay quarterly estimated taxes?
You’ll likely face an underpayment penalty. The IRS calculates it based on the amount you owe and the number of days it’s late. The penalty rate is the federal short-term rate plus 3%, which for 2026 is around 8%. You can avoid the penalty if you pay at least 90% of your current year’s tax liability or 100% of the prior year’s liability (110% if your adjusted gross income was over $150,000).
Can I pay estimated taxes from my business account?
Yes, but be careful: if you’re a sole proprietor or single-member LLC, the IRS considers your business and personal accounts the same for tax purposes. For an S-corp or partnership, you may need to pay from your personal account, as the business may not be the taxpayer. Consult your CPA.
How do I know if I owe state estimated taxes?
Most states require estimated payments if your state tax liability exceeds a certain threshold, often $1,000. Check your state’s tax agency website for specific rules.
What if my income is irregular?
Use the annualized income installment method. It aligns your payments with your actual income, reducing the risk of overpaying early in the year. You’ll need to file Form 2210 with your tax return.
The Bottom Line
Filing quarterly estimated taxes is a non-negotiable part of owning a dental practice. Start by calculating your expected income and tax liability, then pay on time using EFTPS or Direct Pay. Keep track of your actual income and adjust payments as needed. If you’re unsure about calculations, hire a CPA who specializes in dental practices. They can save you from costly mistakes and help you plan for tax season. Don’t wait until April; take action now to avoid penalties and keep your practice financially healthy.