Jury Instructions and New Trial Motions in Utah: What Litigants Need to Know

Of all the things that can go wrong at trial, few have more appellate consequence than an erroneous jury instruction. The instructions define the legal standards the jury applies. They determine which claims are available, what elements must be proven, and how the jury weighs the evidence. An instruction that misstates the law can silently corrupt a verdict — directing the jury toward the wrong question, permitting recovery on a theory the law does not support, or denying a defense the law clearly allows.

Erroneous jury instructions are among the most frequently raised grounds for new trial and among the most consequential appellate issues in Utah civil litigation. This post explains the full cycle: how instruction errors are preserved, how they are raised through post-trial motions, what the court must find to grant a new trial, and what appellate review looks like.

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How Instructions Are Set: The Rule 51 Process

Before instruction errors can be challenged, they must be understood in context. URCP Rule 51 governs the instruction process in Utah civil jury trials:

• Either party may file proposed jury instructions before or during trial
• The court holds a conference to settle the instructions — typically on the record, after both sides have submitted their proposals
• After the conference, any party who disagrees with an instruction — or objects to the court’s refusal to give a requested instruction — must object before the jury retires

The objection must be specific: it must identify the particular instruction at issue and state the grounds for the objection. A generic objection (“we object to Instruction 14”) that does not identify the legal deficiency does not adequately preserve the argument. The objection must state what is wrong with the instruction and — ideally — what the correct statement of the law is.

Instructions that the party failed to object to are subject only to plain error review on appeal. Given the deference appellate courts give juries, plain error review of an instruction issue rarely leads to reversal.

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Types of Instructional Error

Not all instruction problems are the same. The categories matter because they affect both the post-trial motion and the standard of review on appeal.

An Incorrect Statement of the Law

The instruction told the jury the legal standard is X, when the correct standard is Y. The classic example: an instruction on negligence that omitted the foreseeability element, or a damages instruction that permitted recovery for categories the law does not allow. Legal accuracy of jury instructions is reviewed de novo on appeal — the appellate court applies no deference to the trial court’s legal choices.

Failure to Give a Required Instruction

A party timely requested an instruction on an issue — an affirmative defense, a lesser theory of recovery, a damages component the evidence supported — and the court declined to give it. If the instruction was legally correct and supported by sufficient evidence to warrant it, the refusal may be reversible error.

An Ambiguous or Misleading Instruction

The instruction was not technically wrong, but its phrasing was confusing or misleading in a way that likely caused the jury to misapply the legal standard. These cases are harder: appellate courts read instructions as a whole, and ambiguity in one instruction may be cured by clarity in another. The moving party must show that the instruction, read in context, would likely have misled a reasonable juror.

Instruction Inconsistency

Multiple instructions that conflict with each other — one telling the jury that contributory fault bars recovery entirely, another implying comparative allocation — create a situation where no one can know which standard the jury applied. Inconsistent instructions may support a new trial motion even when each instruction, standing alone, would be defensible.

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Challenging Instructions Through Post-Trial Motions

An instruction error challenged by a proper Rule 51 objection is preserved for both post-trial and appellate review. The post-trial motion adds value by:

Developing the record of prejudice. The trial court already knows the instruction was contested. What the post-trial motion can add is a more developed analysis of how the error affected the verdict: which theory of liability the instruction permitted that the law does not allow, why the jury likely relied on the incorrect standard given how the parties argued the case, and what a correctly instructed jury would have been asked to decide instead.

Targeting the harmless error question. Under URCP Rule 61, an instruction error is not grounds for a new trial unless it affected the outcome. The harmless error analysis is where many instruction-based new trial motions succeed or fail. A post-trial motion that methodically demonstrates why the error was not harmless — how the incorrect instruction gave the jury a path to the verdict that a correct instruction would have foreclosed — is doing the essential appellate work.

Creating a gateway to a new trial as an alternative to appeal. Sometimes the instruction error was so prejudicial that a new trial is the appropriate remedy — not just appellate reversal. A Rule 59(a) motion asserting error of law under Ground 7, filed within the 28-day window, gives the trial court the opportunity to grant that relief directly, without the cost and delay of a full appeal. For the 28-day deadline details, see our post-trial deadline guide.

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The Utah Model Jury Instructions (MUJI): A Resource and a Reference

The Utah Judicial Council publishes the Model Utah Jury Instructions (MUJI 2nd), a comprehensive set of pattern instructions covering civil, criminal, and specialized subject areas. Trial courts frequently use MUJI instructions, and parties who depart from MUJI must explain why the modification is legally required.

MUJI is a resource in instruction litigation both ways:

• A party arguing that the court gave a non-MUJI instruction that misstated the law can use MUJI as evidence of the correct standard
• A party defending an instruction can point to MUJI as confirming that the language used is legally appropriate

But MUJI is not infallible. The instructions are periodically updated, and older MUJI instructions may not reflect current case law. A careful post-trial motion (and a careful appellate brief) always checks the underlying authorities — the statutes and cases the MUJI instruction is based on — rather than treating the pattern itself as dispositive.

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What the Court Must Find to Grant a New Trial for Instructional Error

Under URCP Rule 59(a)(7), a new trial may be granted for “error in law occurring at trial.” Two requirements apply:

1. The instruction was legally wrong. The content of the instruction — the statement of the applicable legal standard — must be incorrect. A correct instruction given in ambiguous language raises a harder question than an outright misstatement.

2. The error was not harmless. Under URCP Rule 61, errors that do not affect the substantial rights of the parties are harmless and do not warrant relief. The court asks: was there a reasonable probability that, but for this instruction, the jury would have reached a different verdict?

This is the crux of most instruction-based new trial motions. The moving party must connect the instruction error to the outcome in a concrete way — not just that the instruction was wrong in theory, but that it had a plausible, meaningful effect on what the jury actually decided.

For a full treatment of how harmless error doctrine operates in Utah post-trial motions and appeals, see our post on harmless error in Utah appeals.

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Appellate Review of Instruction Errors

If the trial court denies the new trial motion and the case goes to appeal, the Utah Court of Appeals reviews instruction issues in two parts:

Whether the instruction was legally correct: Reviewed de novo — the appellate court applies no deference to the trial court’s legal choice. If the instruction misstated the law, the appellate court says so.

Whether the denial of a new trial was an abuse of discretion: Even after finding a legal error in the instruction, the appellate court reviews the trial court’s denial of a new trial for abuse of discretion. If the trial court applied the correct legal framework and concluded the error was harmless, the appellate court affords that harmlessness determination some deference.

The most powerful instruction-error appeals are those where the legal error is clear (de novo review works in the appellant’s favor) and the prejudice was obvious (the incorrect instruction opened the door to a liability theory the evidence otherwise would not have supported). When both elements are strong, appellate reversal on instruction grounds is a realistic outcome.

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KEY RULE

URCP Rules 51 and 59(a)(7) — Instruction Errors and the New Trial Standard

Jury instruction errors must be objected to under URCP Rule 51 before the jury retires — with specificity identifying the error and the correct legal standard. An instruction error is grounds for a new trial under Rule 59(a)(7) only if (1) the instruction was legally wrong and (2) the error was not harmless under URCP Rule 61. Legal accuracy of instructions is reviewed de novo on appeal; denial of a new trial is reviewed for abuse of discretion. Utah’s Model Jury Instructions (MUJI 2nd) provide a baseline for what the correct standard looks like — but must be checked against current statutes and case law.

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If an Instruction Error Affected Your Trial

The starting point is the Rule 51 objection: was it made, and was it specific enough to preserve the argument? If yes, the next question is whether the error was harmless — and that analysis requires careful review of how the case was argued to the jury and what theory the incorrect instruction enabled. Lotus Appellate Law works with trial counsel on instruction-based new trial motions and appellate briefing throughout Utah. Contact us within the 28-day window to evaluate your options.