Why are future damages reduced to present value at all?
Because the award arrives as one payment and money received early can be invested, handing over the raw sum of a long run of future losses would pay the plaintiff the losses and the interest those dollars earn as well. The Supreme Court of the United States settled this in Chesapeake & Ohio Railway Co. v. Kelly, 241 U.S. 485, 490 (1916): “in all cases where it is reasonable to suppose that interest may safely be earned upon the amount that is awarded, the ascertained future benefits ought to be discounted in the making up of the award.” Jones & Laughlin Steel Corp. v. Pfeifer, 462 U.S. 523 (1983), quotes that sentence and gives the reason plainly: “the damages award is paid in a lump sum at the conclusion of the litigation, and when it—or even a part of it—is invested, it will earn additional money.”
Pfeifer reduces it to two inputs: “(1) the amount that the employee would have earned during each year that he could have been expected to work after the injury; and (2) the appropriate discount rate, reflecting the safest available investment.” Everything contested in a long-horizon case sits in those two lines; the formal structure is at How the models work. Discounting has a mirror image on the other side of the valuation date: losses after judgment are discounted back, while losses already accrued raise a question of prejudgment interest, covered at Prejudgment interest. A model that discounts a period and also carries it forward has paid for the same delay twice.
Who actually picks the discount rate in a damages case?
In the ordinary case the trier of fact picks it, on the evidence the parties put in; the expert supports a rate rather than imposing one. Jones & Laughlin Steel Corp. v. Pfeifer, 462 U.S. 523 (1983), assigns the task to the trier of fact throughout, and Monessen Southwestern Railway Co. v. Morgan, 486 U.S. 330, 341 to 342 (1988), held that in a jury case under the Federal Employers’ Liability Act “the jury has the task of making the present value determination,” though a judge may “recommend to the jury one or more methods,” short of preempting the jury’s function.
Pfeifer constrains the kind of rate that is defensible even while leaving the number open, and the constraint is tied to an assumption rather than to a market convention. “Once it is assumed that the injured worker would definitely have worked for a specific term of years,” the Court wrote, “he is entitled to a risk-free stream of future income to replace his lost wages; therefore, the discount rate should not reflect the market’s premium for investors who are willing to accept some risk of default.” The same passage adds a consistency condition: because under Norfolk & Western Railway Co. v. Liepelt, 444 U.S. 490 (1980), the lost stream is estimated in after-tax terms, “the discount rate should also represent the after-tax rate of return to the injured worker.” That framing belongs to a wage stream assumed certain. It does not transfer automatically to a commercial claim whose projected profits carry full business risk.
In some proceedings nobody picks the rate because the legislature already did. Mich. Comp. Laws § 600.6306(2) defines “gross present cash value” as “the total amount of future damages reduced to present value at a rate of 5% per year, compounded annually, for each year in which those damages will accrue,” and section 6306(1) applies to a personal injury action “other than an action for medical malpractice.” Whether a statute or decision governs a claim is counsel’s question, answered before the model is built. This Institute states no rate and selects none; rate construction is covered at Discount rates and present value.
What did the Supreme Court decide in Jones & Laughlin Steel Corp. v. Pfeifer?
It decided that there is no single correct method and that the trial court must nevertheless choose one on purpose. The case arose under section 5(b) of the Longshoremen’s and Harbor Workers’ Compensation Act, where the trial court had applied Pennsylvania’s total offset rule as a mandatory federal rule. The Supreme Court vacated, writing that the litigants and amici “urge us to select one of the many rules that have been proposed and establish it for all time as the exclusive method in all federal trials,” and answering: “We are not persuaded, however, that such an approach is warranted.” Its reasons were that “by its very nature the calculation of an award for lost earnings must be a rough approximation,” that “sustained price inflation can make the award substantially less precise,” and that “the question of lost earnings can arise in many different contexts.”
What the Court supplied instead is a coherence rule linking the two halves of the calculation. If the trier of fact builds price inflation into the projected earnings, “the proper discount rate would be the after-tax market interest rate.” If it does not, then “it is necessary to choose an appropriate below-market discount rate,” and the size of the offset “should be chosen on the basis of the same factors that are used to estimate the lost stream of future earnings.” The Court added that it did “not believe a trial court adopting such an approach in a suit under § 5(b) should be reversed if it adopts a rate between 1 and 3% and explains its choice.” That sentence is routinely quoted out of its setting. It concerns reversible error in one category of federal case decided in 1983, rests on an approach whose essential premise the Court said the economic evidence left “distinctly inconclusive,” and is not a benchmark, a recommendation, or a rate this Institute offers.
The holding that travels is the last line on the merits: “whatever rate the District Court may choose to discount the estimated stream of future earnings, it must make a deliberate choice, rather than assuming that it is bound by a rule of state law.” An expert who cannot say in two sentences why the rate matches the risk left in the projection has not made a deliberate choice.
What is the total offset method, and which states require it?
Total offset is the position that the discount rate and the growth in the projected earnings cancel, leaving the award equal to the undiscounted sum of the losses. Jones & Laughlin Steel Corp. v. Pfeifer, 462 U.S. 523 (1983), describes such methods as presuming the ideal discount rate is “completely offset by certain elements in the ideal computation of the estimated lost stream of future income.” Alaska invented the approach and has since reversed course. Pfeifer calls Beaulieu v. Elliott, 434 P.2d 665 (Alaska 1967), “the seminal ‘total offset’ case,” reporting that the Supreme Court of Alaska held “that the market interest rate was fully offset by two factors: price inflation and real wage inflation,” so that “no discount was to be applied.” Alaska Stat. § 09.17.040(b) now provides that “[t]he fact finder shall reduce future economic damages to present value,” determining the present amount as though “invested at long-term future interest rates in the best and safest investments.” Beaulieu survives only as an opt-in: subsection (c) provides that subsection (b) “does not apply to future economic damages if the parties agree” to compute the award under it.
Pennsylvania adopted it by decision in 1980. In Kaczkowski v. Bolubasz, 491 Pa. 561, 421 A.2d 1027 (1980), the Supreme Court of Pennsylvania adopted the Alaska treatment of inflation in modified form, holding: “we find as a matter of law that future inflation shall be presumed equal to future interest rates with these factors offsetting. Thus, the courts of this Commonwealth are instructed to abandon the practice of discounting lost future earnings.” The Pfeifer syllabus notes “the fact that Pennsylvania has adopted the total offset rule for all negligence cases in that forum.” Those are the only two states named on this page, each on the authority of its own decision or statute rather than a survey, and the count was small even in 1980: Justice Flaherty, concurring and dissenting in Kaczkowski, wrote that the rule “has only been adopted in one jurisdiction, i.e., Alaska.” Anyone extending the list should read the authority in the forum rather than a survey, since Alaska’s legislature moved after its court did.
A state rule also does not travel to a federal claim. Pfeifer set aside a judgment applying Kaczkowski “as a mandatory federal rule of decision,” noting that Pennsylvania’s adoption of total offset “is not of controlling importance in this case.” In Monessen Southwestern Railway Co. v. Morgan, 486 U.S. 330 (1988), the Court held that “[i]t was error for the court to have refused on the basis of this state rule to allow an FELA award to be reduced to present value,” because the instruction “improperly took from the jury the essentially factual question of the appropriate rate.” One forum can host a state count under one rule and a federal count under another, and a single model built for both will be wrong in at least one of them.
Why is the discount rate contested rather than technical?
Because the rate is where the parties’ disagreement about certainty becomes a number, and because a long stream’s present value is unusually sensitive to it. Jones & Laughlin Steel Corp. v. Pfeifer, 462 U.S. 523 (1983), ties the risk-free rate to an assumption rather than a convention: it follows “[o]nce it is assumed that the injured worker would definitely have worked for a specific term of years.” A projection already trimmed to near-certain levels and then discounted at a full risky rate has charged for the same uncertainty twice; an optimistic projection discounted at a riskless rate has not charged for it at all.
The Court was also candid that the economics underneath the argument is unsettled, which is why the dispute does not resolve by consulting an authority. Pfeifer called the economic evidence “distinctly inconclusive” regarding “an essential premise” of the real interest rate approaches, named that premise as the stability of the real interest rate over time, and said “whether it is even relatively stable is hotly disputed among economists,” citing Irving Fisher’s The Theory of Interest (1930). Total offset is a strong empirical claim about the same relationship, which is why Kaczkowski defended it with interest theory rather than convenience. Because the effect compounds with horizon, a rate dispute in a decades-long claim can move more money than any liability argument in it, and showing the award across a defensible range of rates takes that demonstration away from the rebuttal expert. A worked illustration is at The rate decides.
Nothing here selects a rate or says what any stream is worth; the number belongs to a retained expert and the rule to counsel. Adjacent questions belong elsewhere: valuing a lost business under a standard of value imposed by law belongs to the Business Valuation Institute at businessvaluationsinstitute.com, and reconstructing the records behind the stream belongs to the Forensic Accounting and Fraud Institute at forensicaccountinginstitute.com. Discounting an individual’s earnings, and its interaction with worklife expectancy, is covered here at Worklife and discounting.