Expected monetary value, usually shortened to EMV, is a way of putting a single dollar figure on a decision whose outcome is uncertain. You multiply each possible outcome’s financial impact by its probability of occurring, then add the products together. A lawsuit with a 60 percent chance of a $500,000 verdict and a 40 percent chance of zero has an EMV of $300,000. That number does not predict what will happen in any one case. It gives you a rational baseline for comparing options, setting a settlement floor, and budgeting for risk.
How to Calculate It
The arithmetic is simple. Express each probability as a decimal, multiply by the dollar value of that outcome, and sum the results across every outcome you have identified.
Say you are weighing a breach-of-contract claim. Your attorney sketches three realistic outcomes: a 30 percent chance of recovering $200,000 at trial, a 50 percent chance of recovering $80,000 through early settlement, and a 20 percent chance of losing and recovering nothing. The math: (0.30 × $200,000) + (0.50 × $80,000) + (0.20 × $0) = $60,000 + $40,000 + $0 = $100,000. That $100,000 is the weighted average of everything that could happen. It becomes the benchmark against which you measure any offer or litigation budget.
Two things make or break the result: the quality of your probability estimates and the completeness of your dollar figures. Overstating your chances of winning, or forgetting attorney fees and expert witness costs, skews the number in ways that lead to bad decisions. The formula is easy. Honest inputs are the work.
When Outcomes Branch
Real lawsuits rarely come down to a single win-or-lose coin flip. A case might have to survive a motion to dismiss, then summary judgment, then a jury verdict on liability, and finally a damages determination. Each stage has its own probability, and each branch shapes what comes next. A decision tree maps those branches, with each fork representing either a choice you control (settle or proceed) or an uncertain event (the judge grants or denies a motion).
Probabilities along a branch multiply. If there is a 70 percent chance of surviving summary judgment and then a 50 percent chance of winning at trial, the compound probability of a trial win is 0.70 × 0.50 = 0.35, or 35 percent. Assign a dollar figure to each endpoint, multiply by its compound probability, add them up, and you have the EMV of the entire path.
The real value of the tree is sensitivity analysis. You can test how the EMV shifts when you change one probability. If raising the estimated chance of surviving summary judgment from 70 percent to 80 percent pushes the EMV above a pending settlement offer, that tells you exactly which legal issue matters most to your bottom line. Preparation time can then go where it moves the needle.
Using EMV to Evaluate a Settlement Offer
For a plaintiff, EMV gives a concrete number to hold up against any offer on the table. If the math says the case is worth $300,000 on a probability-weighted basis and the defendant offers $350,000, taking the offer is the financially rational move regardless of how strong the claim feels. But the raw EMV is only the starting point. You still have to subtract what the case will cost you to see what you would actually keep.
Fees and Costs
Contingency fees are the largest deduction for most plaintiffs. Attorneys typically charge one-third of the recovery when a case settles before suit is filed, rising to 40 percent if it goes to trial.1American Bar Association. Fees and Expenses On a $300,000 settlement, a one-third fee leaves $200,000 before any other costs.
Expert witnesses, deposition transcripts, court reporters, and filing fees add up quickly in complex personal injury and commercial disputes. Medical experts and financial analysts often charge several hundred dollars per hour for review time, and more for deposition and trial testimony. Total expert and discovery costs can run into the tens of thousands in complicated cases. These expenses come out of your recovery, so an honest EMV calculation subtracts them before comparing against any offer.
Rule 68 and the Risk of Rejecting an Offer
Federal Rule of Civil Procedure 68 adds a cost-shifting penalty that makes the math more consequential. If a defendant makes a formal offer of judgment and the plaintiff rejects it, the plaintiff must pay the defendant’s post-offer costs when the final judgment is less favorable than the rejected offer.2Legal Information Institute. Federal Rules of Civil Procedure Rule 68 – Offer of Judgment Those costs can include expert witness fees, deposition expenses, and other litigation costs that accumulated after the offer. The rule does not shift attorney fees in most cases, but the other costs alone can turn a modest verdict into a net loss.
Rule 68 effectively forces both sides to take EMV seriously. A plaintiff who ignores the math and rejects a reasonable offer out of optimism faces real financial consequences. Defendants time offers strategically to maximize that pressure.
Post-Judgment Interest
Time changes the value of a judgment. Federal post-judgment interest runs from the date the judgment is entered, calculated at the weekly average one-year constant maturity Treasury yield published by the Federal Reserve for the week before the judgment date.3Office of the Law Revision Counsel. United States Code Title 28 – Section 1961 As of mid-April 2026, that rate sits at 3.69 percent. In a case that may spend years on appeal, even a modest rate adds meaningfully to the total recovery, and a careful decision tree converts future amounts to present value at each branch.
Taxes on What You Keep
Taxes can claim a significant piece of a recovery, and many plaintiffs do not build this into their EMV until it is too late. Treatment depends on what the damages compensate for.
Damages received on account of personal physical injuries or physical sickness are excluded from gross income under federal tax law.4Office of the Law Revision Counsel. United States Code Title 26 – Section 104 That is true whether the money arrives through settlement or judgment, lump sum or periodic payments. A $250,000 recovery for broken bones and surgery costs after a car accident is tax-free.
Emotional distress is not a physical injury for this purpose. The portion of a settlement that compensates for emotional distress unconnected to a physical injury is taxable. One narrow exception: you can exclude the portion of emotional distress damages that reimburses you for actual medical care costs incurred to treat the distress.4Office of the Law Revision Counsel. United States Code Title 26 – Section 104
Punitive damages are almost always taxable as ordinary income.5Internal Revenue Service. Tax Implications of Settlements and Judgments The only exception applies in wrongful death cases in states where the law provides only for punitive damages in a wrongful death claim. Outside that narrow situation, every dollar is subject to federal income tax, and the liability belongs in the EMV calculation before you decide whether to accept an offer.
Where EMV Misleads You
EMV assumes you are indifferent to risk. It treats a guaranteed $300,000 and a coin flip between $600,000 and nothing as equivalent, because both have the same expected value. Almost nobody actually thinks that way. Most plaintiffs are risk-averse and would rather lock in a certain recovery than gamble on trial, even when the gamble carries a higher EMV. Defendants often lean the other way, preferring to roll the dice on paying nothing rather than writing a certain settlement check.
That asymmetry in risk preferences is where settlement negotiations actually happen. A risk-averse plaintiff will accept less than the EMV to eliminate uncertainty. A risk-tolerant defendant may refuse to pay the full EMV because they value the chance of paying zero. The gap between what each side will accept is not a failure of the math; it is the space where negotiation plays out. Walk into mediation treating EMV as “the answer” and you will misjudge both your own position and the other side’s.
Variance is the second blind spot. Two cases can share an EMV and still look nothing alike. A case with a 90 percent chance of winning $111,000 has an EMV of about $100,000. A case with a 10 percent chance of winning $1,000,000 also has an EMV of $100,000. The second one will almost certainly end in zero. For a plaintiff who needs the money to pay medical bills, treating these as equivalent would be a serious mistake. Sound analysis pairs the EMV with a look at the range of outcomes, not just the weighted average.
EMV Outside Litigation
The same formula is a standard tool for setting contingency reserves on projects. If a construction project faces a 20 percent chance of a $50,000 equipment failure, a 15 percent chance of a $30,000 supply chain delay, and a 10 percent chance of a $100,000 regulatory setback, the combined EMV of those risks is $24,500. A project manager sets that aside as reserve, keeping the budget realistic without overcommitting to risks that may never materialize. Investment comparisons use the same logic: the opportunity with the higher EMV is the better statistical bet, though variance still matters when capital is limited.
Static EMV produces a single number, which can create a false sense of precision. Monte Carlo simulation addresses that by running thousands of randomized scenarios, sampling from probability distributions for each variable rather than relying on fixed estimates. Instead of saying a project will cost $2.4 million, a Monte Carlo analysis might show an 85 percent chance it comes in under $2.6 million and a 50 percent chance it comes in under $2.3 million. For large capital projects or litigation with many interacting variables, that distribution is increasingly the expected standard.
Using EMV Numbers in Court
Running an EMV calculation for your own decision-making is one thing. Presenting probability-weighted damages to a jury is another, and judges apply a gatekeeping function to the methodology. Under the standard set in Daubert v. Merrell Dow Pharmaceuticals, a trial judge must ensure that expert testimony is both relevant and reliable before it reaches the jury. For a financial expert, that means the underlying data has to be trustworthy, the assumptions have to track the factual record, and the method has to be one other experts in the field would recognize as valid.
Courts have consistently required that lost profits and other forward-looking damages be proved with reasonable certainty, meaning the plaintiff shows the loss is more likely than not based on definite, verifiable data. An expert who plugs optimistic probabilities into an EMV model without grounding them in business records, industry data, or established economic principles risks having the whole testimony excluded. The judge does not have to agree with the conclusions, but the methodology has to pass muster. Speculative numbers get thrown out before a jury ever sees them.
If you plan to use EMV-based analysis in litigation, the quality of your inputs matters as much as the math. Historical financial records, comparable transactions, industry benchmarks, and well-documented assumptions are what separate admissible expert testimony from excluded speculation. The formula is the easy part. Defending the numbers that go into it is where cases are won or lost.