Why a Litigation Finance Investment Has an IRR, Not an Interest Rate

People new to litigation finance almost always ask the same question: “So what’s the interest rate?” It is a reasonable question. It is also the wrong question, and answering it correctly reveals something essential about how this industry works and why it is structured the way it is.

Litigation finance investments are not priced with an interest rate. They are measured by an IRR — an internal rate of return. That is not a semantic dodge or a clever bit of banker-speak. It reflects a genuine difference in what is actually happening with the money, and in restrictive states it is the difference between a lawful arrangement and one a court will throw out.

What an Interest Rate Actually Describes Interest is the price of borrowing money that must be repaid. When a bank quotes you eight percent, it is telling you the cost of a debt you are obligated to pay back regardless of what happens in your life. The clock runs, the interest accrues, and the balance is owed no matter what. Interest is the language of debt — of certainty of repayment.

That certainty is the whole point of a loan and the whole reason interest rates exist. The lender expects to be repaid, so the only real question is the price of the money over time. Predictable principal, predictable schedule, predictable rate.

Why That Language Doesn’t Fit Now recall the previous article. A properly structured litigation finance investment is non-recourse. There is no guaranteed repayment. If the case loses, the funder collects nothing — not principal, not “interest,” nothing. You cannot charge interest on a debt that might never have to be repaid, because it is not functioning as debt at all. It is functioning as an equity-like investment in an uncertain outcome.

This is exactly why serious funders speak in terms of return, not interest. They are not lending money at a rate. They are investing capital into an asset — the potential recovery of a lawsuit — that may pay off handsomely, pay off modestly, or pay off nothing at all. The appropriate way to measure the performance of a risky, uncertain, time-dependent investment is its rate of return, not an interest rate.

So What Is an IRR?

Internal rate of return is the standard tool investors use to measure how well capital performed over time, accounting for both how much came back and how long it took to come back. It answers a single question: given what I put in, what I got out, and how many years it took, what annualized return did this investment actually earn?

A quick, illustrative example — numbers chosen only to show the mechanics, not to promise any outcome. Suppose a funder invests one hundred thousand dollars into a case. Two years later the case settles and the funder’s agreed share of the recovery returns one hundred and fifty thousand dollars. The IRR captures both the fifty percent gain and the fact that it took two years to earn it. Change the timeline — the same fifty thousand of profit earned in one year versus four years — and the IRR changes dramatically, even though the dollars are identical.

Time is part of the math in a way a flat interest rate never fully captures.

Interest is the price of a debt you must repay. IRR is the measured return on capital that was genuinely at risk. One assumes you get paid back. The other assumes you might not.

Why the Timeline Is Everything Lawsuits do not run on schedules. A case might settle in eighteen months or grind through trial and appeal for five years. That uncertainty is precisely why IRR is the honest measuring stick.

A funder cannot know in advance when — or whether — the money will come back, so quoting a fixed periodic interest rate would misrepresent the nature of the deal entirely. The return is realized only at resolution, whenever that arrives, if it arrives at all.

This is also why longer cases and riskier cases command higher projected returns. A funder’s capital is tied up and exposed for the entire duration, unable to be deployed elsewhere, with a real possibility of total loss. The projected return has to compensate for that risk and that time.

It is the same logic any investor applies to any risky, illiquid, long-horizon investment.

The Legal Stakes of Getting This Right Here the vocabulary becomes more than accounting. In states that still enforce old usury and champerty doctrines — Kentucky prominently among them — courts examine funding agreements to decide whether they are truly investments or merely loans wearing a costume.

An arrangement that speaks in interest rates, demands repayment on a schedule, and behaves like debt invites a court to treat it as an illegal loan. In one prominent federal case applying Kentucky law, an agreement marketed as a non-recourse investment was still struck down in part because it was framed around interest rates and looked, in substance, like a usurious loan.

The lesson is direct. Using IRR rather than an interest rate is not window dressing. It reflects — and must be backed by — a genuine non-recourse structure where the capital is truly at risk.

When the substance and the language line up, the arrangement stands on solid ground. When they diverge, courts notice.

The Bottom Line The reason a litigation finance investment carries an IRR and not an interest rate comes down to what is really happening. Interest is the price of guaranteed repayment. There is no guarantee here. The funder is investing risk capital into an uncertain outcome over an unpredictable timeline, and the return is measured accordingly. It is more honest, it is more accurate, and in the right jurisdictions it is the difference between a deal that holds up and one that does not.

Disclaimer: This article is provided by White Oak Litigation Finance for general educational purposes only and is not legal, financial, tax, or investment advice. It does not create any attorney–client or advisory relationship. Litigation funding is subject to state-specific law (including champerty, maintenance, and usury doctrines) that varies and evolves; outcomes and returns are never guaranteed. Consult qualified legal and financial professionals before making decisions.