How Much Time Does Manual Document Redaction Actually Take?

Manual redaction of dense legal documents takes roughly 10 to 30 minutes per page, depending on identifier density and document complexity. A 100-page deposition with frequent mentions of names, Social Security Numbers, dates of birth, and medical record numbers can take a full workday for a careful reviewer. At paralegal billing rates of $80 to $150 per hour, that represents $640 to $1,200 in labor cost for a single document.

Why manual redaction takes so long

The time cost breaks into three phases: reading, marking, and verifying.

Reading a page for redaction is not the same as reading it for comprehension. A reviewer must hold every identifier type in mind simultaneously: names in every position in a sentence, SSNs in multiple formats (dashes, spaces, no separator), dates in multiple formats (MM/DD/YYYY, written out, abbreviated), phone numbers, account numbers, addresses, and any other category required by the applicable rule or statute. Missing a single instance because the format was unexpected is the most common cause of redaction failures.

Marking in Adobe Acrobat or Microsoft Word requires switching between reading and using the redaction tool for every single identifier, which creates interruption cost on top of the reading time.

Verification requires a second pass. Best practice is to have a different reviewer verify the first pass, which doubles the time.

How AI changes the time equation

AI detection compresses the reading phase significantly. Pattern matching and named entity recognition scan the entire document in seconds and return a list of flagged items. The reviewer's job shifts from marking to confirming: approve the correct detections, reject any false positives, and mark any items the AI missed.

According to Clio's Legal Trends Report, attorneys and legal staff spend a significant portion of their workday on administrative tasks rather than billable work. Redaction is one of the largest administrative time sinks in litigation and regulatory response work.

The ABA Technology Survey shows growing adoption of AI tools in legal practice, with redaction and document review among the most common use cases.

What the numbers look like in practice

For a 100-page deposition:

• Manual: 10 to 30 minutes per page, 1 to 3 days total
• AI-assisted: AI detects in under 5 minutes total; human review adds 30 to 60 seconds per page for confirmation; total time is 1 to 2 hours

For a 500-page discovery production, manual redaction is not practically feasible within most response windows. AI detection makes that volume manageable by compressing the per-page time to confirmation rather than detection.

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