HR Documentation Best Practices: What to Keep, How Long, and Why It Matters

6/9/2026

In an employment dispute, documentation determines the outcome more often than the underlying facts do. Not because paperwork changes what happened, but because contemporaneous records are the only evidence of what happened that anyone will credit two years later.

Quick answer: Sound HR documentation rests on four disciplines: creating records contemporaneously, separating files by category (personnel, medical, I-9, investigation, payroll), retaining each category for the longest applicable federal or state period, and writing in a way that would read as fair to a stranger.

The File Separation Rules

File separation is not organizational preference. Several of these separations are legal requirements, and combining them creates independent violations.

File	Contents	Access
Personnel file	Application, offer, job description, performance reviews, discipline, training, compensation changes, acknowledgments	HR and the employee's management chain, on a need-to-know basis
Confidential medical file	ADA documentation, FMLA certifications, fitness-for-duty, workers' compensation medical records, health-related accommodation records	Strictly limited — supervisors learn the accommodation, not the reason
I-9 file	Forms I-9 and any retained document copies	HR only — kept separate to limit audit scope
Investigation file	Complaints, interview notes, evidence, reports, findings	Restricted; potentially privileged
Payroll file	Time records, wage rates, deductions, tax forms, garnishments	Payroll and finance
Benefits file	Enrollment forms, beneficiary designations, plan documents	Benefits administration

 

 

The medical file separation is the one most commonly violated and the easiest to prove. Medical documentation in a personnel file is a per se ADA problem, and it produces a second problem: everyone with personnel file access has now seen the employee's medical information.

General Retention Guidance

These are common federal minimums. Several states require longer, and a legal hold overrides every schedule below.

Record Type	Common Minimum
Applications and hiring records (non-hires)	1 year from the record or the action, longer for federal contractors
Personnel and employment records generally	1 year, extended to termination date plus 1 year for terminated employees
Payroll records	3 years
Time cards, wage computation records	2 years
FMLA records	3 years
Form I-9	3 years from hire or 1 year after termination, whichever is later
Benefit plan records	6 years under ERISA; plan documents often longer
OSHA injury and illness logs	5 years
Employee medical and exposure records (OSHA)	Duration of employment plus 30 years
Tax records	4 years after the tax is due or paid

 

 

Practical approach: build one retention schedule to the longest applicable requirement per record type across every jurisdiction you operate in, rather than tracking each separately. The administrative savings exceed the storage cost.

Writing Documentation That Helps You

Most HR documentation is written to satisfy a process. Good documentation is written to be read by a hostile stranger two years later.

Weak	Strong
"Attitude problem."	"On March 4, in the team meeting, when asked to update the project tracker, responded 'that's not my job' and left the room before the meeting ended."
"Not a team player."	"Declined three requests for coverage on 2/12, 2/26, and 3/8 without explanation, after being asked directly by the shift lead."
"Performance has been poor."	"Completed 61% of assigned tickets within SLA in Q1 against a team average of 89% and a documented target of 85%."
"Discussed concerns with employee."	"Met 3/10 at 2:00 p.m. with employee and supervisor. Reviewed the three incidents above. Employee stated she had not been told the tracker was part of her role. Agreed she would take it over effective 3/17. Follow-up scheduled 4/7."

 

 

Five rules that produce the right-hand column:

1. Behavior, not character. Describe what was observed, not what it means about the person.
2. Specific dates, times, and quotes. Vagueness reads as fabrication.
3. Include the employee's response. Documentation that records only the employer's side is discounted.
4. Record what was agreed and when it will be revisited.
5. Write it the same day. Contemporaneous records are credible; reconstructed ones are not.

What Not to Put in Writing

• Medical information in the personnel file or in performance documentation.
• References to protected characteristics or protected activity — age, pregnancy, leave usage, a prior complaint — in performance or disciplinary records.
• Speculation about motive or diagnosis.
• Legal conclusions — "this constitutes harassment," "this violates the ADA."
• Every email is discoverable. "I'm so done with this person" ends careers and cases.
• Comparisons to other employees by name in an individual's file.
• Anything you would not want read aloud to the employee, their attorney, and a jury.

The Contemporaneous Rule

This is the single most important documentation discipline. A performance concern documented in January and revisited in March is credible evidence. The same concern documented in March, after the employee requested leave in February, is evidence of pretext no matter how true it is.

Practical implications:

• Managers should keep dated notes on all direct reports, not only problem performers — selective documentation is itself a pattern.
• Never backdate. Never edit a record without an audit trail.
• If you must document something late, say so explicitly: "Documented 3/20 regarding events of 2/14; delay due to…"
• Freeze changes to job descriptions, performance ratings, and policies for any employee with a pending complaint, accommodation request, or leave.

Employee Access Rights

Many states give employees a statutory right to inspect or receive a copy of their personnel file, with rules on timing, cost, what must be included, and whether they may add a rebuttal statement. Some states extend the right to former employees for a defined period.

Two practical consequences:

• Assume the employee will read it. This is a useful drafting discipline entirely apart from compliance.
• Have a request procedure defining who responds, within what timeframe, and what is included — before the first request arrives from someone with a lawyer.

Legal Holds

When litigation is reasonably anticipated — a charge, a demand letter, a credible threat — the duty to preserve attaches immediately and overrides every retention schedule.

1. Issue a written hold notice to everyone who may have relevant records.
2. Identify all sources: email, chat, shared drives, HRIS, personal devices used for work, and paper.
3. Suspend automatic deletion policies for affected custodians.
4. Document issuance and acknowledgment.
5. Reissue reminders periodically for long-running matters.
6. Release the hold in writing when the matter concludes.

Spoliation — destroying evidence after the duty attaches — can result in adverse inference instructions, sanctions, or default. It converts a defensible case into a lost one.

Electronic Records

• Access controls by file category, reviewed quarterly.
• Audit trails showing who viewed and changed what.
• Encryption at rest and in transit, particularly for medical and payroll data.
• Retention automation that respects legal holds.
• Backup and recovery testing — an unrecoverable backup is not a record.
• Vendor terms addressing data ownership, export, and deletion at contract end.

Frequently Asked Questions

Can medical information be kept in the personnel file?

No. The ADA requires medical information to be maintained in separate, confidential files with restricted access.

How long should we keep records for terminated employees?

Apply the longest applicable retention period for each record type, measured from the termination date where the rule specifies it. Do not purge on the termination date.

Do employees have a right to see their file?

In many states, yes, with rules on timing, cost, and content. Build a procedure before you need one.

Should managers keep their own notes?

Yes, and they should be factual, dated, and consistent across all direct reports. Manager notes are discoverable, so train managers on how to write them.

Can we destroy records after the retention period?

Yes, absent a legal hold, and you generally should — retaining records past their required period expands discovery exposure with no benefit.

Documentation Is a Trainable Discipline

Good documentation is not a personality trait. It is a set of habits — contemporaneous, behavioral, specific, complete — that can be taught and audited.

The HR Generalist Certificate Program covers recordkeeping and documentation across functions. For investigation-specific standards, see the Internal Investigations Certificate Program.

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Additional resources: HR Compliance FAQ | FMLA Recordkeeping Requirements | HR Best Practices