What are the six proportionality factors under FRCP Rule 26(b)(1) and how do courts actually weigh them?

In U.S. federal civil litigation, the scope of discovery is defined by Federal Rule of Civil Procedure 26(b)(1). Since the 2015 amendments, discoverable information must be both relevant to a claim or defense and proportional to the needs of the case. The rule lists six factors courts use to assess that proportionality.

The Six Factors

• The importance of the issues at stake in the action.
• The amount in controversy — what the case is worth.
• The parties’ relative access to relevant information — often called the “information asymmetry” factor, recognizing that one side may hold most of the data.
• The parties’ resources — the financial and technical capacity of each side.
• The importance of the discovery in resolving the issues — how central the requested information is to the dispute.
• Whether the burden or expense of the proposed discovery outweighs its likely benefit.

How Courts Actually Weigh Them

Proportionality is a balancing test, not a checklist with a scoring formula. No single factor is dispositive, and courts weigh them holistically against the specific facts before them.

A few practical patterns recur:

• The burden-versus-benefit factor often does the heavy lifting, but a party resisting discovery generally must support claims of burden with specifics (volume, cost estimates, hours), not bare assertions.
• Importance and information asymmetry can override cost. Where the issues are significant or one party controls most of the evidence, courts may require broad production even when it is expensive.
• Proportionality is a shared responsibility. The 2015 amendments made clear it is not solely the requesting party’s burden to justify scope, nor solely the producing party’s to resist it.

Important Caveats

These factors govern federal civil cases. State courts, administrative proceedings, and other countries apply different standards, and some have no formal proportionality doctrine at all. Always confirm the rules of the controlling jurisdiction.

For a broader overview of related concepts, see e-discovery.