Key Takeaways
- The illiquidity premium is the extra return earned for holding an asset that cannot be sold quickly, measured against a comparable liquid asset of similar risk.
- Part of what is quoted as an illiquidity premium is really credit, complexity or origination premium, so compare against matched public assets, never cash.
- Aviva Investors puts investment-grade private debt premia at around 120bps over the past year, against a long-term average near 50bps.
- The 2026 redemption queues in evergreen private credit funds showed that liquidity terms decide how much of the premium investors keep.
- Investors who can hold to maturity in well-protected, contractual structures are best placed to capture the full premium.
Every investor has felt it. You own something good, you need the cash, and the market wants a discount before it will take the asset off your hands. Or there is no market at all, and you wait. The illiquidity premium is the price of that wait, agreed in advance.
Put simply, it is the extra return earned for holding an asset that cannot be sold quickly or cheaply. Private credit, private equity, real estate and infrastructure all promise some version of it. The premium is easy to quote and hard to measure, and in 2026 many investors in "semi-liquid" private credit funds learned what they had signed up for when they asked for their money back.
This guide covers what the premium is, how large it is today, and how to judge whether you are being paid enough to give up your exit.
What is the illiquidity premium?
The illiquidity premium is the additional yield or return an asset offers over a comparable liquid asset with similar credit or equity risk, as compensation for the fact that it cannot be readily converted into cash. A senior secured loan to a mid-sized business, held to maturity, will usually pay more than a listed bond of the same credit quality. Part of that gap is the illiquidity premium.
The word "comparable" is doing a lot of work. If a private loan pays 4% more than a government bond, most of that difference is credit risk, with only a slice attributable to illiquidity. The honest comparison is against public assets of the same rating, seniority and duration. That is why serious estimates are expressed as a spread over a matched public index.
Why does the illiquidity premium exist?
Investors in private assets demand compensation for several distinct costs:
- Lost optionality: capital that is locked up cannot be redeployed when a better opportunity, or an emergency, arrives.
- Exit cost: selling early usually means accepting a discount on the secondary market, if a buyer exists at all.
- Valuation uncertainty: without daily prices, investors rely on periodic marks, which can lag reality in either direction.
- Timing risk: the moment you most need liquidity tends to be the moment everyone else needs it too.
- Work and complexity: private deals require origination, structuring and monitoring. Some of the spread pays for that labour, and some pays for complexity that public markets avoid.
That last point matters. Part of what gets called an illiquidity premium is really a complexity or origination premium: the reward for work a bond buyer never has to do.
Where is the illiquidity premium found?
The premium appears wherever capital is committed for long periods without a public market.
| Asset class | How the premium is earned | Main liquidity risk |
|---|---|---|
| Private credit | Higher contractual interest than matched public loans or bonds | Limited secondary market; fund gates |
| Private equity | Expected outperformance over listed equity at exit | Long lock-ups; uncertain exit timing and value |
| Real estate | Higher income and value growth on directly held property | Slow, costly sales; valuations lag markets |
| Infrastructure | Long-dated, often inflation-linked cashflows | Very long holding periods; few buyers |
Private credit is the cleanest place to observe the premium, because the return is written into the loan agreement. In private equity it is an expectation about exit values, and how much survives fees and smoothed valuations is long debated. For a fuller tour of these asset classes, see our guide to private market investments.
How big is the illiquidity premium today?
Estimates vary with the asset, period and comparison chosen. Two current reference points help.
Aviva Investors tracks the spread on more than 2,100 investment-grade private debt transactions over 29 years against matched public indices. Its Q2 2026 update puts the average illiquidity premium across sectors at around 120 basis points over the past year, against a long-term average of about 50 basis points. It also finds that structured finance has consistently earned more than private corporate debt, which it attributes partly to a complexity premium.
In sub-investment-grade direct lending, the gap is wider. T. Rowe Price, drawing on PitchBook LCD data, reports that new private credit loans have priced roughly 150 to 300 basis points above broadly syndicated loans since 2019. Some of that is the illiquidity premium; some is the origination and complexity premium described above.
The premium is real, it moves with market conditions, and it is widest where the work is hardest.
The 2026 lesson: liquidity terms decide who keeps the premium
The past year offered a live test. Evergreen private credit funds sold to wealth investors promised private credit returns with periodic liquidity, typically redemptions capped at around 5% of the fund each quarter. In March 2026, investors in Blackstone's flagship private credit fund, BCRED, asked to redeem a record 7.9% of shares, about $3.8bn. Other large managers saw similar queues and held their caps, as Family Wealth Report documented.
Investors discovered that the liquidity they thought they owned came with conditions. A fund that holds cash and liquid assets to meet redemptions also dilutes the premium it is supposed to deliver. The investor ends up paying for liquidity that disappears when it is needed most.
The structure an investor chooses therefore decides how much of the premium they keep, and how it behaves under stress.
An investor who can commit capital for the full life of a loan, and who expects to hold rather than trade, captures the whole spread and avoids the queue. That is the logic behind an "originate and hold" approach, the one we follow at Kingsbury & Partners: senior secured facilities to specialty and non-bank lenders, structured through bankruptcy-remote credit linked note compartments and held to maturity, with the cashflows set out in the contract. The trade-off is explicit from day one: no early exit, and the full spread for those who can wait.
How to judge whether the premium is worth it
Before committing, an allocator should be able to answer five questions.
- Can I afford the lock-up? Map known spending and capital calls against the holding period, plus a buffer.
- What is the right comparison? Measure the spread against a public asset of the same rating, seniority and duration. A comparison with cash flatters every private deal.
- How much of the spread is credit risk? A higher yield that comes from weaker borrowers or lower seniority is a credit premium, and it can be lost in a downturn. Our guide to the capital stack explains why position matters.
- What protects the capital? Security, covenants, subordination beneath you and bankruptcy remoteness matter more than headline yield.
- What happens under stress? Read redemption terms, gates and valuation policy as carefully as the return target.
Framed this way, the useful question becomes "what am I being paid per unit of risk and per year of lock-up?" That is the territory of risk-adjusted returns.
What this means for investors
The illiquidity premium is one of the few durable sources of extra return for patient capital. It rewards investors who can hold to the end and penalises those who need to leave early.
For family offices, wealth managers and private clients, the sensible approach is to size illiquid allocations to genuine time horizons, to separate the true illiquidity premium from credit and complexity premia, and to favour structures where the return is contractual and the protection is built in from the start. Private credit, and particularly structured credit secured on diversified pools of loans, is where that combination is most visible. For how this fits into a wider allocation, see From the 60/40 to 50/30/20 Portfolio.
The premium is paid for patience. The discipline is making sure you can afford to be patient.
Frequently Asked Questions
What is the illiquidity premium in simple terms?
It is the extra return earned for holding an asset that cannot be sold quickly, compared with a similar asset that trades freely.
Is the illiquidity premium the same as the liquidity premium?
Broadly, yes. Both describe the additional yield demanded for holding less liquid assets; economists tend to say liquidity premium, while private market investors usually say illiquidity premium.
How large is the illiquidity premium in private credit?
It depends on the market segment. Aviva Investors' 2026 data shows investment-grade private debt earning around 120 basis points over matched public bonds in the past year, while T. Rowe Price reports private direct lending pricing roughly 150 to 300 basis points above syndicated loans since 2019.
Which investments offer an illiquidity premium?
Private credit, private equity, private real estate and infrastructure, each of which locks capital up for years in exchange for higher expected or contractual returns.
Do semi-liquid or evergreen funds capture the full illiquidity premium?
Usually not. They hold cash and liquid assets to meet redemptions, which dilutes returns, and they can cap withdrawals when demand rises, as several large private credit funds did in 2026.
Who should consider illiquid investments?
Investors with long time horizons, predictable cash needs and enough liquid assets elsewhere to meet obligations, typically professional investors, family offices and high-net-worth individuals, are best placed to hold illiquid assets to maturity.
