Every person you hire as an employee needs the same core paperwork: a federal W-4, a Form I-9, a report to your state's new-hire directory within 20 days of hire (or sooner if your state sets a shorter deadline), and — depending on your state — a written wage notice.
On top of those sit the practice-specific items: license and credential copies, controlled-substance authorization, benefits enrolment, and rabies or dosimetry records where your safety program calls for them.
Here is what to collect, when it's due, and where each document belongs.
Rules vary by state and change
This guide explains federal rules and the state rules it names, as of the date above.
Employment law and veterinary practice rules differ by state and are revised often, so confirm current requirements with your state veterinary board, labor agency or employment counsel before you act on them.
It is general information, not legal advice.
Federal paperwork: the W-4 and the I-9
Two federal forms anchor the file.
The employee's Form W-4 tells you how much federal income tax to withhold from their pay, so have it completed before the first payroll run — an associate veterinarian's first check and a kennel attendant's first check both depend on it.
Use the current edition rather than whatever is in the printer tray: as of this writing the current Form W-4 is the 2026 edition, so pull fresh copies from the IRS site or have your payroll provider supply them.
The second form is Form I-9, and there is no small-practice version of the rule: all U.S. employers must complete it for every person they hire for employment in the United States, citizens and noncitizens alike.
Every associate DVM, technician, assistant, client-service coordinator and kennel attendant on payroll needs one.
The I-9 carries its own deadlines, document lists and edition dates — our Form I-9 guide covers those in detail.
What matters for your filing system is this: the form is not filed with USCIS or ICE.
You keep it, and you make it available for inspection by DHS, DOL or DOJ officials.
State withholding forms and new-hire reporting (20 days)
Whether your state adds its own withholding certificate on top of the federal W-4 is a payroll question, not a federal one: confirm the current form and where it gets filed with your payroll provider or your state revenue agency before the first run, so withholding is right from paycheck one.
New-hire reporting is easy to miss because it isn't a form the employee hands you — it's a report your practice files with the state.
Federal law (42 U.S.C. § 653a) requires you to report each new hire to the State Directory of New Hires within 20 days of the date of hire, unless your state sets a shorter deadline, which the statute lets states do.
Check your own state's new-hire reporting program for its cutoff rather than assuming the federal 20 days is the deadline that applies to you.
The report itself is short: the employee's name, address and Social Security number, the date they first performed paid work, and your practice's name, address and federal ID number.
Where practicable, the report is made on the employee's W-4 or an equivalent form, sent by mail, magnetically or electronically — one more reason the W-4 shouldn't sit in the front desk drawer during a new hire's first week.
Required notices: state wage notices at hire
Wage notices are where new-hire paperwork gets state-specific fast.
These are written notices of pay information that a state's labor law may require you to give at hire — separate documents from the offer letter, with their own required contents and deadlines.
Two states whose rules are detailed enough to plan around:
New York.
The Wage Theft Prevention Act (in effect since April 9, 2011) requires employers to give written notice of wage rates to each new hire (Labor Law § 195.1).
The notice must go out in English and in the employee's primary language whenever the state labor department publishes a translation for it — Spanish, Chinese, Haitian Creole, Korean, Polish and Russian as of this writing.
The department's form LS 54 is the template for hourly employees, and you can use your own notice instead as long as it carries all the required information.
California.
Labor Code § 2810.5 — the state's Wage Theft Protection Act, effective January 1, 2012 — requires a written notice with specified pay information at the time of hire, no later than the employee's start date.
The notice isn't required for employees exempt from overtime, for public employees, or for workers under a qualifying collective bargaining agreement.
Whether a particular salaried veterinarian actually meets an exemption test is its own question — work through it with our guide to exempt vs non-exempt classification before skipping the notice on assumption.
Hiring outside New York and California?
Wage-notice requirements are state law and they don't travel — ask your payroll provider or employment counsel whether your state requires a notice at hire, and get the current template from your state labor department if it does.
Vet-specific paperwork: credentials, DEA, dosimetry and rabies records
Credentials first.
Keep a copy of each new hire's license or credential with their paperwork — the associate DVM's license, your technician's credential — and date it, because renewals move.
There is no single national list of licensed veterinarians: each state board keeps its own records, and a veterinarian needs a license in every state where they practice, which matters when you hire relief vets or someone coming in from another state.
For the verification itself, use our guides to verifying a veterinarian's license and vet tech credentials rather than trusting a photocopy.
Controlled substances come next, and the paperwork differs by role.
If your new associate will prescribe under their own DEA registration, keep a copy of the registration with their credential file and confirm it is current using the steps in our DEA registration verification guide.
If they'll work under the practice's registration instead, the federal rule is that a practitioner employed by another registered practitioner may administer or dispense — but not prescribe — controlled substances under the employer's registration, where state law permits.
Two standing rules belong in the same set of day-one decisions.
A DEA-registered practice may not employ anyone in a role with access to controlled substances who has a conviction for a controlled-substance felony, or whose own DEA application was denied, registration revoked, or registration surrendered for cause.
And in California, a veterinary assistant may obtain or administer controlled substances only if a licensed veterinarian designates them and they hold a valid Veterinary Assistant Controlled Substance Permit (Business and Professions Code § 4836.1) — a permit whose applicants submit fingerprints for a state and federal criminal history check (§ 4836.2).
If your practice takes radiographs and enrolls staff in radiation dosimetry monitoring, the enrolment form is a day-one item too — but the state radiation-control rules behind it weren't part of the research for this guide, so we won't restate a requirement here.
Get the form and the rules that go with it directly from your state radiation-control program, and don't borrow another state's.
Rabies documentation is the vet-specific item most likely to be misunderstood.
CDC's ACIP recommends a 2-dose rabies pre-exposure prophylaxis (PrEP) series, given on days 0 and 7, for people at risk — and it names veterinarians, technicians, animal control officers and their students or trainees among the occupations whose work involves contact with animals that could be rabid.
ACIP puts most veterinarians in rabies risk category 3, because their risk comes from recognized exposures after direct contact with animals; for that group it advises a one-time antibody titer check during years 1–3 after the 2-dose series, or a booster as an alternative.
Treat all of that as a recommendation, not a filing mandate: the research behind this guide found no federal requirement to vaccinate staff against rabies or to collect their vaccination records, and it didn't verify state rules — check with your state health department or public health authority.
If your safety program documents PrEP or titers, those records are medical information — which is exactly why the next section matters.
Three files: personnel, medical and I-9s
Three files, not one.
The personnel file carries the business record: the offer letter, W-4, state withholding form, wage notice, credential copies, benefits enrolment forms, reviews and any discipline.
Benefits enrolment runs on your plan carriers' paperwork — confirm the plan's enrolment window with your provider before the start date, so a new hire isn't left waiting for cover they assumed they had.
The medical file is separate, and that separation is a rule, not a preference: under the ADA's recordkeeping regulation, medical information about applicants and employees must be collected on separate forms, kept in separate medical files, and treated as a confidential medical record.
In a veterinary practice that means rabies titer or vaccination documentation, any occupational health results, and anything else that is health information stays out of the personnel file.
The I-9 file is the third.
The I-9 isn't filed with USCIS or ICE — you keep it and produce it for inspection by DHS, DOL or DOJ officials — so store completed forms wherever your team can produce them quickly, whether that is its own binder or a filtered export from your HR system.
A drawer that takes two minutes to hand an inspector is doing its job; a form buried in fifty personnel files is not.
Retention periods: how long to keep each record
Retention is where new-hire paperwork becomes a records schedule.
The federal baselines the research behind this guide verifies:
| Record | Keep it for | Rule |
|---|---|---|
| Form I-9 | Three years after the date of hire or one year after employment ends — whichever is later | 8 CFR 274a.2 |
| Payroll records | At least 3 years | FLSA, 29 CFR 516.5 |
| Time cards and wage-rate tables | At least 2 years | FLSA, 29 CFR 516.6 |
| Personnel and employment records (applications, hiring, promotion, pay, termination) | One year from the date the record is made or the personnel action occurs, whichever is later | EEOC rules, 29 CFR 1602.14 |
Two cautions on the table.
The one-year personnel-records baseline comes from EEOC rules that apply to employers covered by those statutes — the research behind this guide did not verify how the coverage threshold applies to a practice your size, so treat the table as a federal floor and confirm anything edge-case with your employment counsel.
And don't treat any of these as maximums: when a record is also evidence in a wage dispute or a charge, keep it until the matter is closed regardless of the table.
Notice what isn't on it: a keep-for period for medical files.
The ADA rule puts that information in separate confidential files; this guide's sources don't establish a retention period for them, so confirm with your employment counsel before purging anything medical.
Paperwork is only the first day of onboarding.
What the new hire meets in week one — the schedule, the training plan, the first cases — is covered step by step in our onboarding checklist, and the policies all of this feeds belong in the handbook.
For everything upstream of day one, start at the veterinary hiring hub.
The day-one paperwork checklist
- Form W-4 — current edition from the IRS, completed before the first payroll run.
- Your state's withholding certificate, if your state requires one — confirm with your payroll provider or state revenue agency.
- Form I-9 — the employee's Section 1 and your Section 2, on the deadlines in our Form I-9 guide.
- New-hire report to the State Directory of New Hires — within 20 days of hire, or your state's shorter deadline.
- State wage notice at hire, if your state requires one (New York and California do).
- Benefits enrolment forms, with the plan's enrolment window confirmed.
- License or credential copy, dated and verified against the state board's own lookup.
- DEA paperwork — a registration copy for a prescribing associate, plus any state controlled-substance permit a role needs (in California, a veterinary assistant who obtains or administers controlled substances needs a VACSP).
- Rabies PrEP or titer documentation, if your safety program includes it — filed as medical records.
- Everything in its file: personnel, medical, I-9.

