How to File Quarterly Estimated Taxes as a New Pt Practice
Learn the step-by-step process for filing quarterly estimated taxes as a new physical therapy practice, including deadlines, calculations, and payment methods.
If you’ve opened a physical therapy practice, you’re now responsible for paying taxes on your income throughout the year, not just once at tax time. The IRS requires you to pay estimated taxes quarterly if you expect to owe at least $1,000 in tax after subtracting withholding and credits. This guide walks you through the exact steps to calculate, file, and pay your quarterly estimated taxes as a new PT practice, with realistic figures for 2026.
Why You Need to Pay Quarterly Estimated Taxes
As a practice owner, you are likely a sole proprietor, partner, or S-corp shareholder. In these structures, no employer withholds taxes from your pay. Instead, you must pay estimated tax covering both income tax and self-employment tax (Social Security and Medicare). If you don’t pay enough during the year, you may face penalties, even if you pay the full amount by April 15.
The IRS safe harbor rule: you can avoid penalties if you pay at least 100% of the tax shown on your previous year’s return (110% if your adjusted gross income was over $150,000). For a new practice with no prior year return, you’ll base payments on your current year’s estimated income.
Step 1: Estimate Your Practice’s Net Income
Start with a realistic projection of your practice’s profit for the year. For a new PT practice, this might be based on:
- Number of patient visits per week (e.g., 40-60 visits)
- Average reimbursement per visit (e.g., $80-$120 for cash pay, $60-$100 for insurance)
- Operating expenses (rent, staff salaries, equipment, marketing, software)
For example, if you project $200,000 in gross revenue and $120,000 in deductible expenses, your net profit is $80,000. This is the figure you’ll use for tax calculations.
Step 2: Calculate Your Estimated Tax Liability
Use IRS Form 1040-ES to calculate your estimated tax. The form includes a worksheet that accounts for:
- Income tax (based on your filing status and taxable income)
- Self-employment tax (15.3% on net earnings up to the Social Security wage base, which is $176,100 in 2026)
- Any deductions and credits
For a single filer with $80,000 net profit, a rough estimate for 2026:
- Self-employment tax: $80,000 * 92.35% * 15.3% = $11,310
- Income tax (assuming standard deduction of $15,000): taxable income $65,000, tax about $9,000
- Total estimated tax: $20,310
Divide by 4 to get quarterly payments: about $5,078 per quarter.
Step 3: Know the Quarterly Deadlines
For the 2026 tax year, payments are due on these dates:
| Quarter | Payment Period | 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 |
Note: If a due date falls on a weekend or holiday, the deadline moves to the next business day.
Step 4: Pay Your Estimated Taxes
You have several payment options, all of which accept electronic payments:
- IRS Direct Pay: Free, allows you to pay directly from your bank account. You can schedule payments up to 30 days in advance.
- EFTPS (Electronic Federal Tax Payment System): Free, requires enrollment. Good for businesses that pay frequently.
- Credit/debit card: Convenient but fees apply (around 1.87% to 2.9% of the payment).
- Check or money order: Mail with Form 1040-ES voucher, but allow extra time for delivery.
For state estimated taxes, check your state’s revenue department website. Most states have similar quarterly deadlines and online payment portals.
Step 5: Adjust Your Payments as Income Changes
Your initial estimates are just that: estimates. If your practice grows faster than expected, or if you have a slow quarter, you can adjust your next payment. The IRS allows you to annualize your income, meaning you can pay based on actual income to date. This is especially useful for seasonal practices.
For example, if you projected $80,000 profit but by September you’re on track for $100,000, increase your Q3 payment to avoid a big balance due in April.
Step 6: Track Your Payments and Keep Records
Maintain a spreadsheet or use accounting software to track:
- Payment dates and amounts
- Confirmation numbers for electronic payments
- Copies of filed forms
This documentation is essential for reconciling your payments when you file your annual return (Form 1040 with Schedule C and Schedule SE).
What If You Miss a Payment?
If you miss a deadline, pay as soon as possible. The IRS charges a penalty based on the amount owed and the number of days late, plus interest. The penalty rate is currently around 5% per year, but it can be higher. You can request a penalty waiver if it’s your first time and you have reasonable cause, but don’t rely on that.
FAQ
Q: Do I need to pay quarterly taxes if I’m an S-corp? A: Yes. As an S-corp owner, you must pay yourself a reasonable salary, and the corporation withholds payroll taxes. However, you still need to make estimated payments for any additional income you take as distributions, and the corporation itself may need to make estimated payments if it expects to owe $500 or more in tax.
Q: Can I pay estimated taxes from my business account? A: Yes, you can pay from any bank account. Just make sure you record the payment correctly in your books. If you’re a sole proprietor, it’s common to pay from the same account you use for business.
Q: What happens if I overpay my estimated taxes? A: You’ll get a refund when you file your annual return. The IRS pays interest on refunds, but it’s usually low. To avoid overpaying, try to estimate accurately.
Q: Is there a penalty for underpaying estimated taxes? A: Yes, the IRS charges a penalty if you didn’t pay at least 90% of your current year’s tax liability or 100% of last year’s tax (110% if AGI over $150,000). The penalty is calculated on the underpaid amount and is roughly equivalent to the federal short-term interest rate plus 3%.
The Bottom Line
Filing quarterly estimated taxes as a new PT practice is not optional if you expect to owe more than $1,000. Start by projecting your net income, calculate your tax using Form 1040-ES, and pay by the four deadlines. Use IRS Direct Pay or EFTPS for free electronic payments. Revisit your estimates each quarter and adjust as needed. If you’re unsure, consult a CPA who works with healthcare practices. Setting up a system now will save you from penalties and surprises next April.