The single biggest factor is whether the case settles early or proceeds through every procedural stage. A lawsuit that resolves at mediation or through an early settlement offer can conclude far faster than one that goes through full discovery, expert disclosures, motion practice, and trial. Cases involving multiple parties, cross-claims, or complex damages calculations tend to take longer because there is more information to exchange and more positions to reconcile.

Court backlog also matters. Some jurisdictions and specific judges have heavier caseloads than others, which affects how quickly hearings get scheduled and how far out a trial date is set. Local court rules, mandatory mediation requirements, and whether the case is in state or federal court can each add or remove months from the process.

After filing, the defendant typically has a set window to respond, followed by a period of preliminary motions (such as a motion to dismiss) if either side challenges the pleadings. Discovery — the exchange of documents, written questions, and depositions — is usually the longest phase, often taking many months on its own, particularly in cases with voluminous records or multiple witnesses.

Once discovery closes, the parties may file dispositive motions like summary judgment, which can end the case early or narrow the issues for trial. If the case survives those motions, it moves toward a pretrial conference and then trial, which itself may be scheduled far in advance due to court calendars. Post-trial motions and any appeal add further time on top of the trial court timeline.

Many cases settle, and the point at which that happens has a large effect on total duration. Some defendants and their insurers evaluate exposure early and make an offer before significant litigation costs accrue; others wait until after discovery clarifies the strength of the evidence, which pushes resolution later in the timeline.

Settlement posture can shift as new facts emerge — a strong deposition, an unfavorable expert report, or a court ruling on a key motion can each change how the parties value the case and how motivated they are to resolve it without going to trial.

Because so many variables affect duration, it is more useful to think about a case's timeline as a distribution of possible paths rather than a single fixed number. The path a case takes — early settlement, motion practice, full trial, or appeal — depends on decisions both sides make in response to evolving evidence and legal exposure.

Simulation tools can help map out those branching paths, showing how procedural choices and case strength interact to shape both the likely duration and likely outcome, rather than relying on a single rule-of-thumb estimate.