EMCASCO Insurаnce Co. (EMC) appeals from a judgment in favor of Carol L. Snyder for underinsured motorist benefits *623 under an insurance policy issued by EMC. The district court for Scotts Bluff County, Nebraska, concluded that Snyder’s claim was not barred by the statute of limitations, and following trial, a jury awarded a verdict in favor of Snyder, upon which judgment was entered. EMC perfected this timely appeal after the district court denied its motion for new trial. We find no error and affirm.
BACKGROUND
On July 9, 1993, Snyder was injured in an accident involving a motor vehicle operated by Juanita Case. Snyder filed this action against Case on July 3,1997, seeking damages for injuries to her neck, arm, shoulder, and back. On April 23, 1998, EMC filed a lien in the district court, claiming it had paid Snyder $5,000 pursuant to the medical payment provision undеr her policy and had not yet been repaid. On August 13, partial summary judgment was granted in Snyder’s favor on the issue of Case’s liability. In September, with the knowledge and consent of EMC, Snyder settled her claim against Case by accepting Case’s liability insurance limit of $100,000. Snyder then made a demand upon EMC for underinsured motorist benefits provided by her policy. In a letter dated Octobеr 12, 1998, an EMC claims supervisor denied Snyder’s claim for underinsured motorist benefits.
EMC intervened in this action on October 22,1998, and Case was subsequently dismissed. In its petition in intervention, EMC alleged that it issued an insurance policy to Snyder which provided underinsured motorist coverage. EMC further alleged that Snyder had given notice of her claim for benefits under the underinsured motorist policy and that EMC had given its permission for Snyder to accept Case’s policy limits. EMC alleged that Snyder had made demand for the policy limits under the underinsured motorist coverage, but alleged that this claim was barred by the statute of limitations and prayed for a determination that it had no liability to Snyder under its policy. In her answer and cross-petition, Snyder alleged that she had recovered Case’s liability insurance policy limit of $100,000 and had made demand on EMC for underinsured motorist benefits, which EMC denied. Snyder denied that her claim was barred by the statute of limitations and prayed for judgment against EMC.
*624 Both parties filed motions for summary judgment on the statute of limitations issue. The district court granted Snyder’s motion on January 8,1999, finding that because Snyder’s under-insured motorist policy contained an “exhaustion clause,” “the statute of limitations should begin to run on the date the aggrieved party had the right to institute and maintain suit for underinsured motorist insurance benefits, i.e. the date of compliance with the ‘exhaustion clause’.” The “exhaustion clause” contained within the underinsured motorist policy EMC issued to Snyder provides as follows: “We will pay undеr this coverage only after the limits of liability under any applicable bodily injury liability bonds or policies have been exhausted by payment of judgments or settlements.”
At trial on the issue of damages only, both parties presented evidence regarding the accident and the nature of Snyder’s injuries. Jack Greene, a vocational rehabilitation counselоr, testified as an expert witness on behalf of Snyder. Greene testified without objection that in his opinion, Snyder suffered a 50-percent loss of earning capacity as a result of the injuries she sustained in the accident. Over EMC’s objection on grounds of “relevance and Rule 702,” Greene testified that based upon his calculations, Snyder’s loss of earning capаcity had a value of $353,813.
The parties stipulated to medical bills of $11,330.90. The jury was instructed to determine the amount of damages which would compensate Snyder for her injury and returned a unanimous verdict in the amount of $150,000, upon which judgment was entered. In a ruling on posttrial motions, the district court denied EMC’s motion for new trial but reduced the judgment by $101,484.73, representing the amount of pеrsonal injury and property damage payments received by Snyder from Case’s liability insurance carrier.
ASSIGNMENTS OF ERROR
EMC contends, summarized, that the district court erred (1) in finding that the statute of limitations on Snyder’s claim for underinsured motorist benefits had not expired prior to the time she made her claim against EMC and (2) in allowing testimony from Snyder’s vocational rehabilitation counselor, Grеene.
*625 STANDARD OF REVIEW
In connection with questions of law and statutory interpretation, an appellate court has an obligation to reach an independent conclusion irrespective of the decision made by the court below.
Essen
v.
Gilmore, ante
p. 55,
In proceedings where the Nebraska Evidence Rules apply, the admissibility of evidence is controlled by the Nebraska Evidence Rules; judicial discretion is a factor only when the rules make such discretion a factor in determining admissibility.
Seeber
v.
Howlette,
A motion for new trial is addressed to the discretion of the trial court, whose decision will be upheld in the absence of an abuse of that discretion.
Seeber
v.
Howlette, supra; Hartwig
v.
Oregon Trail Eye Clinic,
254 Neb.
777,
ANALYSIS
Statute of Limitations
Underinsured motorist coverage is a contract which indemnifies an insured when a tort-feasor’s insurance coverаge is inadequate.
Ploen v. Union Ins. Co.,
In
Kratochvil
v.
Motor Club Ins. Assn.,
In this case, it is clear that Snyder commenced her action against Case within the 4-year limitation period governing tort actions. Therefore, § 44-6413(l)(e) is inapplicable, and EMC’s statute of limitations defense must be analyzed under § 25-205. In Schrader, we did not reach the issue of when a cause of action for underinsured motorist benefits accrues under § 25-205. That issue is now squarely before us. EMC argues that Snyder’s claim accrued on the date of the 1993 motor vehicle accident in which she sustained injuries, and is therefore barred under the 5-year limitations period. Snyder argues that because of the exhaustion clause contained in her policy, she had no right to commence an action against EMC until after she recovered the limit of Case’s liability insurance policy in 1998 and that her claim against EMC was, therefore, timely.
Generally, a cause of action accrues and the period of limitations begins to run upon the violation of a legal right, that is, when the aggrieved party has the right to institute and maintain suit.
Reinke Mfg. Co.
v.
Hayes,
As noted, this court has not previously decided the issue of when an insured’s cause of action for underinsured motorist benefits accrues. A majority of state courts addressing this issue have held that because the action sounds in contract, the claim accrues and thе statute of limitations begins to run on the earliest date the contract is breached. See, e.g.,
Grayson
v.
State Farm Mut. Auto. Ins.,
There is also some authority supporting the position taken by EMC that a cause of action for underinsured motorist benefits accrues on the date of the underlying tort. See,
Flatt
v.
Country Mutual Insurance Co.,
In urging that we hold that the underinsured motorist claim accrued on the date of the underlying tort, EMC argues that “[a]n insured should not be able to unreasonably delay or indefinitely postpone the operation of the statute of limitations by failing to make a demand for payment.” Brief for appellant at 23. We do not find this аrgument persuasive, in that we perceive no reason for a person who is partially compensated for an injury to be dilatory in pursuing a contractual claim against his or her insurer for the remainder. Moreover, an insurer is capable of protecting its interests by including provisions in its policy obligating the insured to give notice of events which could lеad to underinsured motorist exposure. See,
Ploen
v.
Union Ins. Co.,
We conclude that the majority rule as stated above is sound and consistent with our well-established rule that an
*629
action on a written contract accrues at the time of breach or failure to perform. Accordingly, we hold that an insured’s cause of action on an insurance policy to recover underinsured motorist benefits accrues at the time of the insurer’s breach оr failure to do that which is required under the terms of the policy. The point at which the statute of limitations commences to run must be determined from the facts of each case.
Cavanaugh
v.
City of Omaha,
As noted above, the policy which constituted EMC’s contractual undertaking to Snyder specifically provided that it would “pay under this [underinsured motorist] coverage only after the limits of liability under any applicable bodily injury liability bonds or policies have been exhausted by payment of judgments or settlements.” In
Ploen
v.
Union Ins. Co.,
Admission of Expert Testimony
Admissibility of expert testimony is based on four factors: (1) whеther the witness is qualified as an expert; (2) whether the testimony is relevant; (3) whether the testimony will assist the trier of fact; and (4) whether the probative value of the testimony, even if relevant, is outweighed by the danger of unfair prejudice or other considerations.
Phillips
v.
Industrial
*630
Machine,
EMC does not question Greene’s qualifications as an expert in the field of vocational rehabilitation counseling, but contends that his opinion placing a monetary value on Snyder’s loss of earning capacity was inadmissible because it
included a mathematical calculation that he was not qualified to make . . . did not include the proper factors for determining a loss of earning capacity, and was not helpful to the jury to the extent that it was a calculation that lay people could make without the testimony of an expert.
Brief for appellant at 29.
Damages for permanent impairment of future earning capacity may not be based on speculation, probability, or uncertainty, but must be shown by competent evidence that such damages are reasonably certain as the proximate result of thе pleaded injury.
Phillips
v.
Industrial Machine, supra; Uryasz
v.
Archbishop Bergan Mercy Hosp.,
In Phillips, we held that a vocational rehabilitation counselor’s opinion regarding an injured party’s impairment of future earning capacity should not have been admitted because the witness assumed that the individual was disabled without any medical evidence to substantiate the assumption. This case is distinguishable from Phillips in that Greene testified that he based his opinion regarding Snyder’s loss of earning capacity in part upon medical records reflecting her physical condition and degree of impairment. The record contains medical evidence that as the result of the injuries she sustained in the accident, *631 Snyder has a permanent impairment including a 5-percent whole person impairment for myofascial pain in her cervical spine, and a 10-percent whole person impairment attributable to pain and decreased range of motion in her lumbar spine. There was also medical evidence that Snyder was under lifting restrictions due to her injuries. Greene also testified that he considered and relied upon an occupational therapist’s functional capacity assessment of Snyder performed on September 22, 1998, which listed a “variety of physical abilities and limitations” relating to Snyder’s ability to perform various job-related physical tasks.
Greene further testified that he performed a labor market analysis upon which he determined that Snyder’s physical limitations after the accident resulted in a “very substantial loss of access to the labor market” and reduced her earning potential from $10 to $8 per hour. He stated that his calculation was bаsed upon a full-time work schedule, both before and after the accident, and a remaining worklife expectancy of 20 years, from age 41 to 61.
Neb. Rev. Stat. § 27-702 (Reissue 1995) provides: “If scientific, technical, or other specialized knowledge will assist the trier of fact to understand the evidence or to determine a fact in issue, a witness qualified as an exрert by knowledge, skill, experience, training, or education, may testify thereto in the form of an opinion or otherwise.” Greene’s opinion regarding the nature and extent of the impairment of Snyder’s future earning capacity and its monetary value was based on evidence of permanent physical impairment which, on the basis of his labor market anаlysis, limited the work she could perform and the wages she could earn compared to her preinjury capabilities. We cannot say that Greene’s specialized knowledge as a vocational rehabilitation counselor would not assist the jury in determining how Snyder’s physical impairment affected her future earning capacity. We therefore conclude that the trial court did not abuse its discretion in overruling the objection to Greene’s opinion regarding the value of Snyder’s loss of future earning capacity. We note that the trial court properly instructed the jury that any damages for future losses must be reduced to present cash value.
*632 CONCLUSION
For the reasons stated above, we conclude that the district court did not err in determining that Snyder’s claim against EMC for underinsured motorist benefits provided by her insurance policy was not barred by the applicable statute of limitations and, further, that the trial court did not abuse its discretion in permitting testimony in the form of expert opinion regarding the impairment of Snyder’s future earning capacity. Likewise, we conclude that the district court did not err in denying the motion for new trial and therefore affirm its judgment.
Neb. Rev. Stat. § 44-359 (Reissue 1998) provides that in a successful action to enforce a policy of insurance by the insured, the court shall tax attorney fees against the insurance carrier.
Control Specialists
v.
State Farm Mat. Auto. Ins.
Co.,
Affirmed.
