The New Ot Practice Tax Calendar: Every Deadline You Cannot Miss
A practical 2026 tax deadline calendar for new OT practices, covering federal, state, and quarterly obligations with actionable steps.
Starting an occupational therapy practice brings many responsibilities, and taxes are among the most critical. Missing a deadline can trigger penalties and interest that strain your cash flow. This guide provides a clear, month-by-month calendar of every tax deadline you cannot miss as a new OT practice owner in 2026, with concrete steps you can take this week to stay compliant.
Why a Tax Calendar Matters for Your OT Practice
Unlike a salaried job, running a practice means you are responsible for estimating and paying taxes throughout the year. The IRS expects payment as you earn income, not just once a year. For a new practice, failing to pay estimated taxes on time can result in underpayment penalties, even if you owe nothing at year-end. A structured calendar helps you avoid these penalties, manage cash flow, and reduce stress.
Key Deadlines at a Glance
The table below summarizes the major federal deadlines for 2026. State deadlines vary, so verify with your state’s revenue department.
| Deadline | What’s Due | Who Must File |
|---|---|---|
| March 15 | S-corp tax return (Form 1120-S) | S-corporations |
| April 15 | Individual tax return (Form 1040) | Sole proprietors, LLCs |
| April 15 | First quarter estimated tax payment | All practices |
| June 15 | Second quarter estimated tax payment | All practices |
| September 15 | Third quarter estimated tax payment | All practices |
| October 15 | Extension deadline for individual returns | If you filed for extension |
| January 15, 2027 | Fourth quarter estimated tax payment | All practices |
Quarterly Estimated Tax Payments: The Core of Your Calendar
If you expect to owe more than $1,000 in federal taxes for the year, you must make quarterly estimated payments. This applies to sole proprietors, partners, and S-corp shareholders. The due dates are April 15, June 15, September 15, and January 15 of the following year. Each payment covers income tax and self-employment tax (Social Security and Medicare).
To calculate your payment, use IRS Form 1040-ES. A simple method: estimate your annual net income, subtract deductions, calculate the tax, and divide by four. For a new practice, your first year’s income may be unpredictable, so review your numbers each quarter and adjust if needed. If you miss a payment, the IRS charges interest and a penalty, which can be up to 5% of the unpaid amount per month.
Annual Filing Deadlines: Sole Proprietor vs. S-Corp
Your business structure determines your annual filing deadline. Sole proprietors and single-member LLCs report income on Schedule C of their personal Form 1040, due April 15. S-corporations must file Form 1120-S by March 15. If you need more time, you can file for a six-month extension, but this only extends the filing deadline, not the payment deadline. Pay any estimated tax due by the original deadline to avoid penalties.
State and Local Tax Obligations
Most states require quarterly estimated payments and an annual return, similar to federal. Some states have different due dates, so check your state’s department of revenue website. Additionally, you may need to pay state unemployment tax (SUTA) if you have employees, and possibly local taxes if your city or county imposes them. For example, in California, the annual LLC fee is due by April 15, and in New York, state estimated payments follow federal dates. Always confirm your specific obligations.
Payroll Taxes: If You Have Employees
If you hire staff, you must withhold federal income tax, Social Security, and Medicare from their paychecks. You also pay the employer’s share of Social Security and Medicare, plus federal unemployment tax (FUTA). Payroll taxes are deposited on a semi-weekly or monthly schedule, depending on your total tax liability. For new employers, the IRS typically requires monthly deposits, due by the 15th of the following month. For example, January payroll taxes are due by February 15. Use the Electronic Federal Tax Payment System (EFTPS) to make deposits. State payroll taxes, including state unemployment insurance, have their own schedules.
How to Build Your Own Tax Calendar This Week
Take these five steps now to create your personalized tax calendar:
- Determine your business structure. If you haven’t already, decide between sole proprietorship, LLC, or S-corp. This affects your deadlines and tax forms.
- List all tax obligations. Include federal income tax, self-employment tax, state income tax, payroll taxes (if any), and any local taxes.
- Mark the dates on a digital calendar. Use Google Calendar or a project management tool. Set reminders one week and one day before each deadline.
- Set up EFTPS. Register at eftps.gov to make federal tax payments online. This is free and provides a record of your payments.
- Create a separate bank account for taxes. Transfer a percentage of each client payment into this account. A common approach is to set aside 25% to 30% of net income for taxes, depending on your bracket.
Common Mistakes to Avoid
New practice owners often miss deadlines because they underestimate their tax liability or forget to adjust payments after a profitable quarter. Another common error is mixing personal and business expenses, which complicates your tax return. Also, don’t ignore state deadlines: they can differ from federal. Finally, if you hire contractors, you may need to file Form 1099-NEC by January 31, even if you don’t have employees.
FAQ
What happens if I miss a quarterly estimated tax payment? You will owe interest and a penalty on the underpaid amount. The penalty is calculated based on the number of days the payment is late and the current interest rate, which is around 8% per year. You can reduce the penalty by paying as soon as possible.
Can I change my estimated payments mid-year? Yes, you can adjust your payments if your income changes. Use Form 1040-ES to recalculate, and pay the new amount for the next quarter. This is common for practices that grow faster than expected.
Do I need to file a tax return if my practice had no income? Yes, you still need to file a return to report zero income and any expenses. For an S-corp, you must file Form 1120-S even if there is no activity. Failure to file can result in penalties.
Are there any tax credits for new OT practices? Yes, you may qualify for the Qualified Business Income (QBI) deduction, which allows you to deduct up to 20% of your qualified business income. Also, if you provide health insurance to employees, you may be eligible for the Small Business Health Care Tax Credit. Consult a tax professional to see what applies to you.
The Bottom Line
A tax calendar is not optional for a new OT practice. Missing deadlines can cost you money and time. By understanding the key dates, setting up a system, and setting aside funds, you can stay compliant and focus on growing your practice. Start this week: mark the quarterly dates, register for EFTPS, and open a tax savings account. If you’re unsure about your specific obligations, invest in a consultation with a CPA who specializes in small healthcare practices. It’s a small price for peace of mind.