7 Things to Know Before You Start a Small Animal Practice

Starting a small animal practice is exciting, but the tax side can trip you up if you’re not prepared. Here are seven things you need to know before you open your doors, so you can avoid costly mistakes and keep more of what you earn.

1. Your Business Structure Affects Your Taxes

The legal structure you choose determines how you pay taxes, your liability, and your paperwork. For a small animal practice, the most common options are:

• Sole Proprietorship: Easiest to set up, but you’re personally liable, and you pay self-employment tax on all profits.
• LLC (Limited Liability Company): Offers liability protection and lets you choose how you’re taxed (as a sole proprietor, partnership, or S-Corp).
• S-Corporation: Can save on self-employment taxes, but requires payroll and more compliance.
• C-Corporation: Rare for small practices, but may be useful if you plan to seek investors.

What to do this week: Talk to a CPA who works with veterinary practices. They can help you choose the structure that fits your goals. The cost of forming an LLC ranges from $50 to $500 in filing fees, plus annual report fees (often $100-$300).

2. You Must Pay Estimated Quarterly Taxes

As a practice owner, you’re responsible for paying taxes throughout the year, not just once at tax time. The IRS requires quarterly estimated payments if you expect to owe more than $1,000 in tax. These payments cover income tax and self-employment tax (Social Security and Medicare).

What to do this week: Calculate your projected income and set aside 25% to 35% of each profit check in a separate bank account. Use IRS Form 1040-ES to estimate your quarterly payments. Deadlines are typically April 15, June 15, September 15, and January 15.

3. You Can Deduct Startup Costs

Many expenses you incur before your doors open are deductible, but the IRS has rules. You can deduct up to $5,000 in startup costs in your first year, and the rest must be amortized over 180 months. Startup costs include market research, training, legal fees, and initial advertising.

What to do this week: Keep every receipt for pre-opening expenses. Create a spreadsheet to track them by category. If you spend more than $50,000 in startup costs, the $5,000 deduction begins to phase out.

4. Equipment Depreciation Is a Big Deal

Your exam tables, X-ray machines, and ultrasound units are major investments. You can’t deduct the full cost in one year; instead, you depreciate them over their useful life. However, Section 179 allows you to deduct up to $1,160,000 (2026 limit) of qualifying equipment in the year you place it in service, subject to a business income limit. Bonus depreciation may also be available.

What to do this week: List all equipment you plan to buy and their estimated costs. Ask your CPA about Section 179 and bonus depreciation to maximize first-year deductions.

5. Home Office Deduction: Use It Correctly

If you run your practice from home (e.g., for administrative work), you may qualify for the home office deduction. The space must be used regularly and exclusively for business. You can use the simplified method ($5 per square foot, up to 300 square feet) or the actual expense method.

What to do this week: Measure your home office space and document its exclusive use. Keep a log of hours used. If you’re unsure, the simplified method is easier and often sufficient.

6. Payroll Taxes Are Your Responsibility

If you hire staff, you must withhold income tax, Social Security, and Medicare from their paychecks, and you must also pay the employer’s share. You’ll need to register for an Employer Identification Number (EIN) and file payroll tax returns (Form 941) quarterly. Payroll services can handle this for you, but you’re still liable for errors.

What to do this week: If you plan to hire, set up payroll before your first employee starts. Compare payroll services: Gusto ($40-$60/month), ADP ($50-$100/month), or QuickBooks Payroll ($45-$75/month). Ensure you understand your deposit schedule (monthly or semi-weekly).

7. Sales Tax on Services and Products

Most states do not tax veterinary services, but they do tax tangible goods like prescription medications, pet food, and retail products. You’ll need to collect sales tax on those items and remit it to your state. Rates vary by state and locality, typically 4% to 10%.

What to do this week: Check your state’s Department of Revenue website for veterinary-specific rules. Register for a sales tax permit before you open. Set up your point-of-sale system to automatically calculate sales tax on taxable items.

FAQ

Q: Can I deduct the cost of my veterinary license? A: Yes, state licensing fees are deductible as business expenses. Keep the receipt and include it with your other professional fees.

Q: What if I don’t have enough cash to pay my quarterly taxes? A: Pay as much as you can. The IRS charges penalties for underpayment, but paying something is better than nothing. You can also adjust your withholding if you have a spouse’s W-2 income.

Q: How long should I keep tax records? A: Keep all tax returns and supporting documents for at least 3 years, but 7 years is safer, especially if you have depreciable assets. Store them digitally and back up.

Q: Should I hire a CPA or use tax software? A: For a practice, a CPA who knows veterinary business is worth the investment. They can help with entity choice, depreciation, and audit protection. Fees range from $500 to $2,000 for a basic return.

Related guides

• 7 Questions to Ask Before Buying a Small Animal Practice
• Best Practice Management Software for Small Animal Practices

The bottom line

Starting a small animal practice is a big financial step, but understanding these seven tax essentials will put you ahead. Choose the right entity, set aside money for quarterly taxes, track startup costs, and use depreciation to your advantage. Work with a CPA from day one, and you’ll avoid surprises at tax time. Take one action this week: schedule a consultation with a tax professional who specializes in veterinary practices. Your future self will thank you.