How Long Should You Keep Client Documents? A Retention Guide for Accounting Firms

This is general commentary, not legal or tax advice — retention requirements vary by state, document type, and your firm's specific engagement letters. Always confirm current requirements with your state board and the AICPA's records retention guidance before setting firm policy.

The common instinct: keep everything, forever

Many firms default to storing every client document indefinitely, reasoning that more records mean less risk if a question comes up later. In practice, that instinct trades one risk for another: every document you store is also a document that could be exposed in a breach.

Why some firms are shortening retention windows

Client-submitted documents — W-2s, bank statements, ID copies — are exactly the kind of sensitive data that makes a breach costly and reputationally damaging. Once an engagement is complete and you've extracted what you need into your own records and working papers, there's often little reason to keep the client's raw uploaded files sitting in a portal indefinitely.

A practical middle ground

• Keep your own work product (returns, financial statements, working papers) per your standard retention policy
• Set a defined, short window for raw client-submitted files after an engagement closes — long enough to resolve any immediate follow-up, short enough to limit exposure
• Document the policy clearly so clients know what to expect

ClientBrief automatically deletes uploaded documents seven days after an engagement is marked complete, which is one reason firms use it for intake specifically — the raw files don't linger in the portal after you've downloaded what you need.

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