Uninsured Motorist Defense Does Not Convert a Tort Suit into Contract: No Prejudgment Interest for UM-Defended Personal Injury Actions

I. Introduction

In Cinda Haddon v. Ladarius Vanlier, et al. (Tenn. May 12, 2026), the Supreme Court of Tennessee resolved whether a plaintiff may recover prejudgment interest when suing a tortfeasor for personal injuries, but the case is defended by the plaintiff’s uninsured motorist (“UM”) carrier under Tennessee’s Uninsured Motorist Act (“UM Act”), Tenn. Code Ann. §§ 56-7-1201–1206.

The accident facts were undisputed: Ms. Haddon was injured when Mr. Vanlier turned and collided with her vehicle. She sued Mr. Vanlier for negligence and negligence per se. Because Mr. Vanlier could not be served, Ms. Haddon proceeded as permitted by Tenn. Code Ann. § 56-7-1206(d) after serving her UM carrier, Auto-Owners Insurance Company, which elected to defend in its own name under § 56-7-1206(a).

A jury awarded Ms. Haddon $320,000, entirely for categories of personal injury damages (pain and suffering, loss of enjoyment of life, permanent injury, and medical expenses). The dispute arose post-trial: Ms. Haddon sought prejudgment interest; the trial court denied it because the case was a personal injury action. The Court of Appeals reversed, characterizing the suit as contract because it involved a UM carrier. The Supreme Court granted review to decide the correct characterization—and thus whether prejudgment interest is legally available.

II. Summary of the Opinion

The Supreme Court held that Ms. Haddon’s action—though defended by the UM carrier—is, in substance, a personal injury tort action. Applying Tennessee’s “gravamen” framework, the Court concluded:

  • The legal basis of the claim was tort (negligence), not breach of contract.
  • The damages sought and awarded were exclusively personal injury damages, not contract remedies.

Because prejudgment interest is not available in personal injury actions under Tennessee law as incorporated by Tenn. Code Ann. § 47-14-123, the Court reversed the Court of Appeals and reinstated the trial court’s denial of prejudgment interest.

III. Analysis

A. Precedents Cited

1. Standard of review: discretion bounded by correct legal standards

  • Spencer v. A-1 Crane Serv., Inc., 880 S.W.2d 938 (Tenn. 1994): reaffirmed that prejudgment interest decisions are typically discretionary and reviewed for abuse of discretion.
  • Castillo v. Rex, 715 S.W.3d 321 (Tenn. 2025): supplied the abuse-of-discretion definition (wrong legal standard, illogical conclusion, or clearly erroneous assessment of evidence). Here, the dispositive question became whether the trial court used the correct legal standard—which turned entirely on how to classify the claim.

2. The statutory/common-law boundary for prejudgment interest

  • Louisville & N.R. Co. v. Wallace, 17 S.W. 882 (Tenn. 1891): the foundational Tennessee authority that prejudgment interest is not available in personal injury claims under the pre-1979 common law that Tenn. Code Ann. § 47-14-123 incorporates.
  • Francois v. Willis, 205 S.W.3d 915 (Tenn. Ct. App. 2006) (Koch, J.): cited as confirming the continuing force of the no-prejudgment-interest rule for personal injury.
  • Johnson v. Tenn. Farmers Mut. Ins. Co., 556 S.W.2d 750 (Tenn. 1977), and Myint v. Allstate Ins. Co., 970 S.W.2d 920 (Tenn. 1998): used to contrast personal injury claims with contract claims. The Court invoked these cases for the proposition that prejudgment interest may be awarded in breach of contract actions (even with unliquidated damages), subject to equitable considerations.

3. The “gravamen” framework: substance over labels

  • Gunter v. Lab'y Corp. of Am., 121 S.W.3d 636 (Tenn. 2003), and Redwing v. Cath. Bishop for Diocese of Memphis, 363 S.W.3d 436 (Tenn. 2012): supported de novo review of claim characterization and emphasized substance over form.
  • Benz-Elliott v. Barrett Enters., LP, 456 S.W.3d 140 (Tenn. 2015): provided the modern two-part gravamen inquiry used here: (1) the legal basis of the claim, and (2) the type of injuries/damages sought.
  • McFarland v. Pemberton, 530 S.W.3d 76 (Tenn. 2017), and Jacobi v. VendEngine Inc., No. M2023-01459-COA-R3-CV, 2025 WL 400697 (Tenn. Ct. App. Feb. 5, 2025): reinforced that the gravamen test is used across doctrinal contexts and is fact-intensive.

4. Distinguishing earlier UM-contract framing

  • Schleif v. Hardware Dealer's Mutual Fire Insurance Co., 404 S.W.2d 490 (Tenn. 1966): the key case relied upon by Ms. Haddon. The Supreme Court distinguished it. In Schleif, the plaintiffs sued the UM carrier directly after the carrier denied liability under the policy; the contract was the action’s foundation and drove the statute of limitations analysis. The Court stressed Schleif was pre-UM Act and involved a coverage denial—unlike Ms. Haddon’s negligence suit where no breach of the policy was alleged.
  • McCall v. Maryland Cas. Co., 516 S.W.2d 353 (Tenn. 1974), and Brewer v. Richardson, 893 S.W.3d 935 (Tenn. 1995): cited to show how the UM Act changed procedure—particularly enabling cases to proceed when the tortfeasor cannot be served—undermining the notion that an insured’s “only action” is on the policy in this procedural posture.

5. Tort duty and pleading baselines

  • McCall v. Wilder, 913 S.W.2d 150 (Tenn. 1995), and Smith v. Fisher, 11 Tenn. App. 273 (Tenn. Ct. App. Oct. 14, 1929), perm. app. denied (Tenn. Apr. 5, 1930): supported the proposition that drivers’ duties arise from law (tort), not contract—aligning the “legal basis” prong with negligence.
  • Watry v. Allstate Prop. and Cas. Ins. Co., No. M2011-00243-COA-R3-CV, 2011 WL 6916802 (Tenn. Ct. App. Dec. 28, 2011): used to underscore what a breach-of-contract claim requires (allegations of conduct inconsistent with a policy provision and resulting damages)—missing from Ms. Haddon’s complaint.

6. UM Act litigation mechanics: defenses, estoppel, and “legal liability”

  • Harvey v. Birchfield, 535 S.W.2d 334 (Tenn. 1976): explained why UM carriers must raise policy defenses during the UM Act suit or be estopped later. The Court used this to reject the argument that the presence of contract defenses transforms the plaintiff’s tort claim into a contract action.
  • Cavalier Ins. Corp. v. Osment, 538 S.W.2d 399 (Tenn. 1976) (Humphreys, J., concurring): acknowledged the insured has a direct contract with the carrier, but the Court emphasized that contract existence is not equivalent to a ripe breach claim.
  • Davis v. Grante Mut. Cas. Grp., No. M2016-02239-COA-R3-CV, 2017 WL 4331041 (Tenn. Ct. App. Sept. 28, 2017): supported the Court’s conclusion that UM carriers have no contractual obligation to pay until the tortfeasor’s liability is established—meaning Ms. Haddon lacked a cognizable breach-of-contract basis at the outset.

7. Damages taxonomy: what was (and was not) requested

  • Chambliss, Bahner and Crawford v. Luther, 531 S.W.2d 108 (Tenn. Ct. App. 1975): cited as an example of typical contract remedies (e.g., reliance/consequential damages), highlighting their absence from Ms. Haddon’s pleadings and the jury’s verdict form.

8. The UM Act’s limiting principle: no better recovery than if the tortfeasor had liability insurance

  • Garrison v. Bickford, 377 S.W.3d 659 (Tenn. 2012), quoting Stallcup v. Duncan, 684 S.W.2d 643 (Tenn. Ct. App. 1984): supplied the core statutory purpose—UM coverage provides only the protection the insured would have had if the tortfeasor carried liability insurance.
  • Lady v. Kregger, 747 S.W.2d 342 (Tenn. Ct. App. 1987): cited to describe the legislature’s intent to provide an efficient procedure for complete relief, without expanding substantive recovery beyond what is otherwise available.

B. Legal Reasoning

The Court’s reasoning is structured and rule-driven: prejudgment interest depends on claim type; claim type depends on gravamen; gravamen depends on (1) legal basis and (2) damages sought.

  1. Prejudgment interest is categorically unavailable for personal injury claims.
    The Court treated Tenn. Code Ann. § 47-14-123 as incorporating the “statutory and common laws” in force as of April 1, 1979. Under that incorporated common law, Louisville & N.R. Co. v. Wallace bars prejudgment interest in personal injury actions.
  2. The Court rejected formalism: UM procedure does not alter tort substance.
    The Court emphasized the “gravamen” inquiry from Benz-Elliott v. Barrett Enters., LP: the label a litigant attaches (or the fact that an insurer appears and asserts policy defenses) does not control. The Court looked to what Ms. Haddon actually sued for and what she actually recovered.
  3. Legal basis prong: the complaint asserted duties imposed by law.
    Ms. Haddon pleaded negligence duties owed by motorists—squarely a tort framework supported by McCall v. Wilder and Smith v. Fisher. The complaint contained no coverage-denial or policy-breach allegations, and thus did not satisfy a breach-of-contract pleading model as illustrated by Watry v. Allstate Prop. and Cas. Ins. Co..
  4. Defense posture prong: the carrier’s policy defenses are compelled by UM Act mechanics.
    Auto-Owners’ contract-based defenses did not recharacterize the claim. Under Harvey v. Birchfield, UM carriers must raise policy defenses in the UM Act action or risk estoppel later; the Court treated this as a procedural consequence, not a change in the plaintiff’s cause of action.
  5. Ripeness prong: no breach-of-contract claim existed when suit began.
    The Court reasoned that even if a policy exists (Cavalier Ins. Corp. v. Osment), there is no contractual duty to pay until the uninsured motorist’s legal liability is established. Citing Davis v. Grante Mut. Cas. Grp., the Court found liability was not resolved until trial; therefore, Ms. Haddon could not plausibly ground her lawsuit in a then-existing breach by Auto-Owners.
  6. Damages prong: the verdict reflected purely personal injury compensation.
    The Court closely tracked the trial: medical testimony, family-impact testimony, and the verdict form categories—all classic personal injury damages. The Court contrasted this with contract-remedy paradigms (e.g., Chambliss, Bahner and Crawford v. Luther), which were absent from pleadings, instructions, and the jury award.
  7. Statutory purpose prong: avoiding an “enhanced recovery” due to uninsured status or service problems.
    Finally, the Court grounded its holding in the UM Act’s purpose: UM coverage should not place an insured in a better position than if the tortfeasor had carried liability insurance (Garrison v. Bickford quoting Stallcup v. Duncan). Allowing prejudgment interest here would create a benefit tied to the happenstance of uninsured status or inability to serve, contrary to that limiting principle.

C. Impact

  • Clarifies claim characterization in UM Act litigation for prejudgment interest. Plaintiffs cannot obtain prejudgment interest simply because the UM carrier is the practical defendant at trial; courts must apply the gravamen test and will treat most negligence-based UM Act suits as personal injury actions.
  • Limits expansion of damages through procedural substitution. The decision prevents UM procedure (service on the carrier and carrier-led defense) from enlarging recoverable items beyond what would be available against the tortfeasor.
  • Cabins the reach of Schleif v. Hardware Dealer's Mutual Fire Insurance Co. While not overruling Schleif, the Court effectively confines its “contract” framing to contexts where the insurer’s policy obligations are themselves the dispute (e.g., denial of coverage), rather than cases litigating the tortfeasor’s negligence and personal injury damages.
  • Practical litigation consequence: Plaintiffs and defendants should expect prejudgment interest motions to turn primarily on the pleadings, the theory of liability tried, and the damages submitted to the jury—not on the insurer’s involvement or reservation of policy defenses.

IV. Complex Concepts Simplified

Prejudgment interest
Interest added to a judgment to compensate for the time between when a claim arises and when judgment is entered. In Tennessee, it may be available in contract cases (equitable discretion), but historically it is not available for personal injury tort damages.
Gravamen of the action
The true substance of a lawsuit—what it is really about—determined by looking past labels to the legal theory asserted and the type of damages sought.
UM Act procedural substitution
The UM Act allows service on the UM carrier and permits the carrier to defend as though it were the defendant when the uninsured motorist cannot be served. This changes litigation mechanics, but (as this case holds) does not automatically change the suit’s substantive nature from tort to contract.
Estoppel from failing to raise policy defenses
Under Harvey v. Birchfield, if the UM carrier does not raise certain policy defenses during the UM Act action, it may be barred from asserting them later. This incentivizes carriers to plead contract defenses early—but that does not transform the plaintiff’s tort claim into a contract claim.
“Legal liability” predicate for UM payment
UM coverage generally requires that the uninsured motorist be found legally responsible for the insured’s damages. Until that liability is determined, the carrier has no obligation to pay, undermining attempts to reframe a tort suit as a breach-of-contract action absent a distinct coverage dispute.

V. Conclusion

The Supreme Court of Tennessee established a clear rule for UM Act cases seeking prejudgment interest: courts must apply the gravamen test, and where (as here) the claim’s legal basis is negligence and the damages are personal injury damages, the action remains a personal injury suit—even if the UM carrier defends in its own name and asserts policy defenses. Because Tennessee law bars prejudgment interest in personal injury actions, Ms. Haddon could not recover it. The decision reinforces that the UM Act is designed to replicate the protection available had the tortfeasor been insured, not to enhance recovery based on uninsured status or service obstacles.