Most relief veterinarians paid on a 1099 owe 15.3% self-employment tax on their net earnings and need to send the IRS estimated payments four times a year. That holds whether you work as a sole proprietor, a single-member LLC or an S corp. The structure you pick changes how you pay yourself and how much paperwork you file. It doesn't change the core routine: know exactly what you earned, set money aside from every payout, and pay on time.
Do Relief Veterinarians Have to Pay Quarterly Taxes?
Yes, for most. The IRS says sole proprietors, partners and S corp shareholders generally have to make estimated tax payments if they expect to owe $1,000 or more when they file. No practice is withholding tax from a 1099 relief shift, so that number arrives quickly.
The IRS due dates don't line up with calendar quarters:
A due date that lands on a weekend or legal holiday moves to the next business day. You can also pay weekly or monthly, as long as enough is in by each deadline.
Relief income is lumpy, so the penalty rules matter. You generally avoid an underpayment penalty by paying at least 90% of this year's tax or 100% of last year's, whichever is smaller, with stricter rules for higher incomes. If most of your shifts land late in the year, Form 2210's annualized method can match your payments to when you actually earned the money.
Picking up relief shifts on top of a W-2 associate job? The IRS notes you may be able to raise the withholding on your employee paycheck with a new Form W-4 instead of making separate estimated payments.
How Much Self-Employment Tax Does a Relief Vet Owe?
Self-employment tax is Social Security and Medicare for people who work for themselves. The rate is 15.3%: 12.4% for Social Security and 2.9% for Medicare. It kicks in once your net self-employment earnings reach $400 for the year.
As an employee, your practice paid half of that and you never saw it. As a relief vet, you pay both halves. The IRS softens this a little by letting you deduct the employer-equivalent half when figuring your adjusted gross income.
Self-employment tax sits on top of regular federal income tax and any state income tax. That's why a percentage set aside from every payout works better than guessing in April. Ask your CPA for a number based on your income and state, then move it to a separate account, such as a high yield savings account, each time a practice pays you.
Which Structure Fits a Relief Vet: 1099, LLC or S Corp?
A single-member LLC doesn't change your federal taxes on its own. The IRS treats it as a disregarded entity unless it elects to be taxed as a corporation, and the owner pays self-employment tax the same way a sole proprietor does. Relief vets usually form one for state-law reasons, which is a conversation for an attorney as much as a CPA.
The S corp is where the real tax difference lives, along with the most rules. You must pay yourself reasonable compensation as wages before taking non-wage distributions, and the IRS can reclassify distributions as wages when the salary is too low. Its own guidance on the issue lists a Tax Court case involving a veterinary corporation, Veterinary Surgical Consultants, P.C. v. Commissioner, among the decisions backing that authority.
For a newer relief vet, the sole proprietor or default LLC route is usually simpler. An S corp tends to make sense only when steady relief income is high enough that payroll and a second tax return cost less than the payroll tax you'd save. Run that math with a CPA before you file the election.
Which Relief Vet Expenses Can You Deduct?
The IRS lets self-employed workers lower their tax by deducting ordinary business expenses, as long as they keep receipts. For relief vets, the common ones include:
- Business mileage. The 2026 standard rate is 72.5 cents per mile from January 1 to June 30 and 76 cents per mile from July 1 to December 31. Log the date, practice and miles for every trip, and ask your CPA how the commuting rules apply to your schedule.
- Licenses and registrations. State veterinary licenses, renewals and the registrations you need to practice.
- Continuing education. Course fees, conference registration and related travel that keep your skills current.
- Professional liability insurance. The malpractice coverage you carry as an independent relief vet.
- Health insurance premiums. Self-employed people may qualify for the self-employed health insurance deduction.
Insurance is also where many new relief vets find a gap. Without an employer, there's no group disability plan covering your income if you can't work.
Why Can't Relief Vets Rely on 1099s to Track Income?
Starting with payments made in 2026, a business generally only has to file a Form 1099-NEC once it pays you $2,000 or more in a year, up from $600. Pick up one or two shifts at a practice and you may never get a form from them.
The tax is still owed. The IRS is plain about it: you must report all income on your return, even if you don't receive Forms 1099 from the businesses that pay you. A relief vet working across five or six practices needs one complete record that doesn't depend on each practice's paperwork. Our guide to being an awesome relief professional covers the rest of the business side, from setting rates to building relationships with practices.
How Does Groove Keep Relief Tax Records in One Place?
Groove by Hound is a private relief platform for the practices you already work with, and it's free for relief vets. You keep 100% of your shift pay, with no shift booking fees or placement fees. For taxes, a few features do most of the work:
- One dashboard across every practice. Groove's Relief Performance Dashboard shows paid shifts, total earnings, hours worked and averages across all your practices in real time.
- Payment history by practice. Shifts booked through Groove are paid out automatically, and each practice's metrics and payment history sit in one place.
- Invoices for practices not on Groove. The manual invoicing tool lets you bill a practice that isn't on Groove yet, so that income lands in the same record.
- Pay terms on every shift. Hourly, flat rate, production or custom terms are attached to each booking, so earnings match what you agreed to.
- A built-in Tax Planner. Your Groove earnings flow in automatically, and you can add other 1099 or household income. You can log expenses like malpractice, CE, licensing and mileage, and get an estimate of your federal tax. It also shows your quarterly estimated payment deadlines and lets you record each payment as you make it.
That record turns quarterly estimates into a short routine. A week before each due date, pull your earnings for the IRS payment period, apply the set-aside percentage your CPA gave you, and pay online or with Form 1040-ES. At year end, the same totals help you check every 1099 you do receive and catch the income you'll need to report without one.
What Should a Relief Vet Do Before January 15?
The next estimated payment covers income earned from September 1 to December 31, and it's due January 15. Start with three numbers: what you've earned so far this year, what you've already paid in estimates, and what you owed in total last year. If those numbers live in five practice inboxes and a notes app, this quarter is the right time to put them in one place.
Taxes are one of the least fun parts of relief work. They're also one of the most predictable, and a vet who can see every shift and payout at a glance can get through April without a scramble.