The New Plastic Surgery Practice Tax Calendar: Every Deadline You Cannot Miss
A practical 2026 tax calendar for new plastic surgery practices, covering quarterly estimates, payroll, and year-end deadlines with actionable steps.
Running a plastic surgery practice means juggling patients, staff, and revenue, but taxes are a year-round responsibility. Missing a deadline can trigger penalties and interest that eat into your profit. This guide lays out every tax deadline you cannot miss in 2026, with realistic figures and steps you can take this week to stay compliant.
Why a Tax Calendar Matters for Your Practice
As a new practice owner, you are now responsible for taxes that your previous employer handled. The IRS expects estimated tax payments quarterly, and your state may have its own schedule. Missing a deadline by even one day can result in penalties, often 0.5% of the unpaid tax per month, plus interest. For a practice generating $50,000 in quarterly profit, that could mean $250 per month in penalties alone. A simple calendar prevents this.
Quarterly Estimated Tax Payments (Form 1040-ES)
If your practice is a sole proprietorship, partnership, or S-corp, you must pay estimated taxes on income not subject to withholding. For 2026, the IRS requires payments by:
- April 15, 2026 (for income in January through March)
- June 15, 2026 (for April through May)
- September 15, 2026 (for June through August)
- January 15, 2027 (for September through December)
How much to pay: Use the safe harbor rule. Pay at least 100% of your prior year’s tax liability (or 110% if your adjusted gross income was over $150,000) to avoid penalties. For a new practice with no prior year, estimate based on projected profit. For example, if you expect $120,000 in net profit, set aside 25% to 30% for federal taxes, plus state. That is roughly $2,500 to $3,000 per quarter.
Action this week: Open a separate business savings account and transfer 25% of every deposit into it. This creates a tax reserve without extra effort.
Payroll Tax Deadlines (Form 941)
If you have employees, you must withhold federal income tax, Social Security, and Medicare. The IRS requires quarterly Form 941 filings by:
- April 30, 2026 (Q1)
- July 31, 2026 (Q2)
- October 31, 2026 (Q3)
- January 31, 2027 (Q4)
Deposits are due semi-weekly or monthly, depending on your total tax liability. For most small practices, monthly deposits are due by the 15th of the following month. For example, March payroll taxes are due April 15.
Action this week: Use a payroll service like Gusto or ADP. They handle deposits and filings automatically. Costs range from $40 to $100 per month, but they eliminate the risk of missed deadlines.
Annual Business Tax Deadlines
Beyond quarterly payments, several annual deadlines apply to your practice:
- March 15, 2026: S-corp and partnership tax returns (Form 1120-S or 1065). If you are an S-corp, this is your deadline, not April 15.
- April 15, 2026: Sole proprietorship and single-member LLC returns (Schedule C on Form 1040). Also the deadline for C-corps (Form 1120).
- September 15, 2026: Extended deadline for S-corps and partnerships (if you filed for an extension).
- October 15, 2026: Extended deadline for sole props and C-corps.
Action this week: Confirm your business structure with your accountant. If you are an S-corp, mark March 15 on your calendar now.
State and Local Tax Deadlines
State income tax deadlines often mirror federal dates, but not always. For example, California requires estimated payments in June and January, and some states have separate franchise taxes. Check your state’s revenue department website for specifics. Also, if you collect sales tax on retail items like skincare products, you may have monthly or quarterly filings. For a practice selling $5,000 in products monthly, that could be $400 to $500 in sales tax per month, depending on your rate.
Action this week: Create a spreadsheet listing your state’s deadlines. Most states allow online filing, and many offer e-mail reminders.
Year-End Tax Planning Deadlines
Tax planning is not just for April. Key year-end deadlines include:
- December 31, 2026: Deadline to make purchases that qualify for Section 179 deductions. For example, buying new surgical equipment worth $20,000 can reduce your taxable income by that amount.
- December 31, 2026: Deadline to set up a retirement plan, like a SEP IRA, to deduct contributions for 2026. You can contribute up to 25% of your compensation, capped at $69,000 for 2026.
- January 15, 2027: Final estimated tax payment for 2026.
Action this week: Meet with your accountant to project your 2026 income and decide if you need to accelerate expenses or defer income. For a practice expecting $150,000 in profit, buying $10,000 in supplies before year-end could save $2,200 in federal taxes (at 22% bracket).
Common Mistakes to Avoid
- Ignoring quarterly estimates: Many new owners assume they can pay once a year. This triggers underpayment penalties.
- Mixing personal and business expenses: This complicates deductions and can trigger audits. Use a dedicated business credit card.
- Forgetting payroll tax deposits: The IRS treats these as trust fund taxes. Personal liability can attach to owners who fail to remit.
- Missing state deadlines: State penalties can be as high as 5% per month, so verify your state’s schedule.
FAQ
Q: What if I miss a quarterly estimated tax payment? A: File and pay as soon as possible. The IRS charges a penalty based on the amount and days late, but it is often less than 1% per month. You can also adjust your withholding to cover the shortfall.
Q: Can I deduct the cost of my medical license and board certification? A: Yes, these are ordinary and necessary business expenses. Keep receipts and log the dates. They are deductible on Schedule C or as business expenses.
Q: Do I need to pay sales tax on Botox and fillers? A: It depends on your state. Some states tax cosmetic injectables as medical services (exempt), others as products (taxable). Check your state’s rules. For example, New York exempts them, but Texas taxes them.
Q: How do I handle taxes for my independent contractor nurses? A: You do not withhold taxes for independent contractors. Instead, issue Form 1099-NEC by January 31, 2027, if you paid them $600 or more. Keep their W-9s on file.
The Bottom Line
A tax calendar is not optional for a new plastic surgery practice. It protects your cash flow and avoids penalties. Start by marking the four quarterly dates, the payroll deadlines, and your annual return due date. Set aside 25% of every deposit into a tax account, and use payroll software to automate filings. With these steps, you can focus on your patients, not tax surprises. If you are unsure about your structure, hire a CPA who works with medical practices. Their fee, typically $1,500 to $3,000 per year, is a deductible business expense that pays for itself in peace of mind.