Understanding Motion Grant Rates: A Guide for Civil Litigators

Motion grant rates are the most directly actionable piece of judicial intelligence available to civil litigators. Unlike appointment history or general judicial temperament, grant rates measure something precise: the frequency with which a specific judge rules in favor of specific types of motions. Used correctly, this data changes which motions you file, when you file them, and how you argue them.

This guide explains what motion grant rate data measures, how to interpret it, and how to build it into your pretrial strategy.

What Grant Rate Data Measures

A motion grant rate is the percentage of filed motions of a given type that a specific judge ruled upon favorably — meaning the motion was granted in whole or in substantial part. RulingIQ calculates grant rates from docket data across several motion categories:

• Motions to dismiss under Rule 12(b)(6) (failure to state a claim)
• Motions to dismiss under Rule 12(b)(1) (subject matter jurisdiction)
• Motions for summary judgment (plaintiff-filed and defendant-filed, separately)
• Motions to compel in discovery disputes
• Motions for class certification under Rule 23
• Motions in limine
• Motions for sanctions

Each category is computed separately because grant rates vary significantly by motion type, and a judge's pattern on 12(b)(6) tells you almost nothing reliable about their pattern on class certification.

Why National Averages Mislead

Attorneys who rely on broad benchmarks — "federal judges grant about 20% of motions to dismiss" — are working with a misleadingly imprecise baseline. The variation around that national average is enormous:

Studies of Rule 12(b)(6) grant rates in federal district courts find ranges from under 10% to over 45% across judges in the same district in the same time period. A judge with a 43% 12(b)(6) grant rate is not a statistical outlier — there are dozens of judges at that level. But the attorney who treats the 20% national average as the relevant reference point for their motion-to-dismiss decision before that judge has made a significant analytical error.

Case type creates additional layers of variation. A judge's overall 12(b)(6) grant rate may be 24%, but their grant rate in securities fraud cases specifically may be 51%, reflecting a rigorous application of the Private Securities Litigation Reform Act's heightened pleading standards. The relevant benchmark for your case is always the case-type-specific rate, not the aggregate.

Reading Grant Rate Data: Three Practical Rules

Rule 1: Always Compare to the District Baseline

A 12(b)(6) grant rate of 28% means something different in a district where the average is 35% versus one where the average is 18%. Judges should be evaluated relative to their peers in the same court, not against a national benchmark that may reflect a different case mix.

RulingIQ presents every judge's grant rate alongside the district baseline, so you see the delta immediately rather than having to compute it yourself.

Rule 2: Look at Sample Size Before Relying on the Rate

A judge who has ruled on 6 motions to dismiss in your case category and granted 3 of them has a 50% grant rate that tells you almost nothing reliable. A judge who has ruled on 73 motions to dismiss in your case category and granted 38 is giving you a statistically robust signal.

This matters most for judges who are new to the bench, who handle a narrow specialty docket, or who serve in smaller divisions with thin case volume. Grant rate data for these judges should be treated as directional context, not predictive precision. RulingIQ flags sample sizes below the confidence threshold so you can calibrate accordingly.

Rule 3: Separate Plaintiff and Defendant Grant Rates for Summary Judgment

Summary judgment motions are directional — they are filed by the moving party seeking judgment in their favor. A judge's aggregate summary judgment grant rate conflates two very different things: how often plaintiffs win on their own summary judgment motions versus how often defendants win on theirs.

These rates diverge significantly. In commercial litigation, defendant summary judgment grant rates typically exceed plaintiff rates by 15-25 percentage points, reflecting the nature of the standard (plaintiff must raise a genuine issue of material fact; defendant merely needs to show the absence of one). But judges vary significantly around this structural asymmetry.

A judge whose defendant summary judgment rate is 58% (above average) and whose plaintiff rate is 36% (also above average) is a different case manager than one whose defendant rate is 71% and plaintiff rate is 12%. The first judge is granting well-supported motions from both sides. The second judge has a structural asymmetry that favors defendants even more than the procedural standard would predict.

Translating Grant Rates into Strategic Decisions

The 12(b)(6) Decision

Filing a motion to dismiss is not free. It costs attorney time, generates a response and reply, and signals to the judge how you want to conduct the case. The decision to file should be driven by two factors: the legal strength of the dismissal argument, and the judge's grant rate in your case category.

A rough framework: if the legal argument is strong (you would give it 60%+ odds before a neutral judge) and the judge's case-type-specific 12(b)(6) rate exceeds 30%, the motion is a clear priority. If the legal argument is borderline and the judge's rate is below 20%, the motion is probably a cost center. The interesting decision is in the middle quadrant — arguable legal grounds before a judge whose grant rate is near the district average.

In that middle quadrant, look beyond the grant rate to the judge's opinion writing style on 12(b)(6) motions. Do they engage seriously with every element-by-element deficiency argument? Or do they tend to find one dispositive ground and stop? A judge who writes thorough 12(b)(6) opinions that address all raised arguments is telling you that quality briefing that covers every angle will get a full hearing.

The Summary Judgment Calculus

Summary judgment strategy is where grant rate data has the most direct economic impact. In cases where your client is the defendant:

A high defendant summary judgment grant rate (above 55%) from the assigned judge shifts your settlement floor upward. You have a credible dispositive motion in your portfolio. Filing date matters — some judges signal through their scheduling orders that they prefer to receive summary judgment motions early, after limited discovery; others set the summary judgment deadline close to the trial date after full fact development.

Plaintiff-side attorneys facing a judge with a high defendant summary judgment rate need to frame their settlement strategy around the reality that the case faces a real probability of ending at summary judgment rather than at trial. That does not necessarily mean settling early, but it does mean investing in a summary judgment record from the beginning of the case — taking targeted depositions early, ensuring documentary evidence is well-preserved, and briefing the summary judgment opposition with the same care as a trial brief.

Discovery Motion Strategy

Motion-to-compel grant rates reveal a judge's philosophy about discovery more directly than any written standard. A judge who grants motions to compel 68% of the time is telling you that they are willing to intervene in discovery disputes and will generally side with the party seeking disclosure. A judge who grants 34% of such motions is telling you that they expect parties to resolve discovery disputes themselves and will not bail out an attorney who files a compel motion without genuine meet-and-confer effort.

This data should shape your initial discovery planning. Before the requesting party sends a broad ESI demand, knowing the judge's compel rate helps you assess whether you have a judicial backstop if the producing party resists. Before the producing party draws objection lines on relevance and proportionality, knowing the compel rate helps you assess how those objections are likely to fare.

Combining Grant Rate Data with Opinion Research

Grant rate data tells you what a judge does. Reading their actual opinions tells you why and how. The combination is more powerful than either alone.

If your judge has a high 12(b)(6) grant rate and you want to understand what kind of briefing succeeded in those granted motions, reading three or four of the underlying opinions gives you the argument structure, the citation patterns, and the analytical framework the judge found persuasive. You are not guessing — you are reverse-engineering the winning brief.

Judge profiles on RulingIQ link grant rate data to representative opinions in each case category, so you can move from "this judge grants 44% of 12(b)(6) motions in employment cases" to "here are four recent opinions where the motion succeeded" in one workflow.

Conclusion

Motion grant rates are not a substitute for legal judgment. A strong legal argument matters regardless of the judge's historical rate. But grant rate data is the most direct quantitative signal available about how a specific judge exercises discretion on the motions you are planning to file. Ignoring that signal is leaving information on the table.

Build grant rate research into your pretrial workflow before the scheduling conference. Know your judge's rates for each motion type you anticipate. Combine that quantitative baseline with qualitative opinion research. Then make strategic decisions — about which motions to file, how to draft them, and how to price settlement risk — from a position of genuine intelligence rather than assumption.