Private Markets Pathway · Private Debt

Private Debt Valuation and Performance Measurement

Updated 8 October 2026 · Fact-checked

Private loans rarely trade, so you value them with a discounted cash flow model. You discount expected cash flows at a market yield that reflects credit risk and illiquidity. You measure performance with IRR on actual and residual cash flows, plus yield and loss metrics such as default rate and recovery rate.

Understand Private Debt Valuation and Performance Measurement

A public bond has a screen price. A private loan does not. No one posts a quote, so the manager must estimate fair value. This is the core problem of the topic.

The standard approach is discounted cash flow (DCF). You project the loan's interest and principal, then discount them at a rate a market buyer would demand today. That rate is built from a base rate (or risk-free rate) plus a credit spread plus an illiquidity premium. If the borrower's credit worsens or market spreads widen, the discount rate rises and fair value falls. If the loan is repaid early, or credit improves, value rises toward par.

Most private loans are floating rate. Their coupon resets with a reference rate, so interest rate moves have little effect on value. Spread changes and credit quality matter much more. Fair value may also be cross-checked against recent transactions in similar loans, the price paid at origination, and the value of the collateral. For distressed loans, a recovery or enterprise value approach may replace DCF, because the question becomes how much the lender gets back, not what coupon it earns.

Performance is measured at fund level and loan level. The main return measure is the IRR, which is the discount rate that sets the present value of all cash flows (contributions, distributions and the ending net asset value) to zero. Because the fund is valued by estimate, the ending NAV is itself an input to IRR. A stale or aggressive NAV distorts the result.

Return is only half the story. Lenders earn a capped upside, so losses matter a lot. You track default rate, recovery rate and loss rate, and compare yield with loss. A loan that yields 11% but loses 3% a year to credit losses nets about 8% before fees. Always compare yield with losses and fees before judging a strategy.

Key rules to remember

Fair value of a loan (DCF): Fair value = Σ [CFt ÷ (1 + r)^t], where r = base rate + credit spread + illiquidity premium; CFt includes interest and principal. Use expected cash flows after allowing for default risk, or put the risk in the spread, but not both.
IRR: 0 = Σ [CFt ÷ (1 + IRR)^t], with contributions negative, distributions and ending NAV positive; Includes the residual NAV as a final inflow. It is money-weighted, so timing of cash flows matters.
Expected loss rate: Loss rate = Default rate × Loss given default; Loss given default = 1 − recovery rate.
Loss given default: LGD = 1 − Recovery rate; Recovery rate is the share of exposure recovered after default.
Net credit yield (approximate): Net yield ≈ Gross yield − Expected loss rate; A quick screening tool. Fees come off next to reach the investor's net return.
Floating-rate coupon: Coupon = Reference rate + Spread; Spread is the lender's credit compensation. Price depends mainly on spread, not on the reference rate.

How to solve Private Debt Valuation and Performance Measurement questions

Use this order for any valuation or performance question on private debt. Read the command word first, then work through the steps and show every number.

1Identify the loan type: senior, unitranche, mezzanine or distressed. This tells you whether DCF or a recovery approach fits.
2Lay out the cash flows by date: interest, principal, fees, and any expected early repayment.
3Build the discount rate: reference rate plus current market spread for the borrower's credit plus any illiquidity premium. Update the spread if credit has changed.
4Discount the cash flows and sum them to get fair value. Compare with par and with cost, and say whether the loan is at a premium or discount.
5For performance, list fund cash flows with correct signs and include ending NAV as the last inflow. Solve for IRR, or test a given rate.
6Compute loss metrics: default rate × (1 − recovery) gives the loss rate. Subtract it from yield to get a net credit return.
7State the conclusion in the client's terms: what the number means for return, risk and liquidity, and any caution about NAV estimates.

Quickest way: Spread and loss shortcut

When to use it: Use when the question asks for a quick fair value change, a net yield, or a comparison of two loans, and no full cash flow schedule is needed.

For a floating-rate loan, ignore base rate moves. Focus on the change in spread.
Estimate price change ≈ −(spread change × remaining duration). A 1% wider spread on a loan with duration of 3 gives roughly −3%.
Net yield ≈ gross yield − (default rate × (1 − recovery)).
Rank loans by net yield, then check seniority and collateral before choosing.
For IRR multiple-choice, test the options in the cash flow equation rather than solving from scratch.

Common mistakes in Private Debt Valuation and Performance Measurement

Using a public bond yield with no liquidity adjustment to discount a private loan.
It is the easiest available rate, and students forget the loan cannot be sold quickly.
Fix: Add an illiquidity premium and the correct credit spread for the borrower.
Leaving the ending NAV out of the IRR cash flows.
Students treat IRR as only a function of cash paid in and out.
Fix: Treat residual NAV as a final inflow. Without it the IRR is understated for an active fund.
Treating rate rises as a big value hit for a floating-rate loan.
Habit from fixed-rate bond duration.
Fix: The coupon resets, so value moves mainly with credit spread and credit quality.
Using the default rate as the loss rate.
Recovery is forgotten.
Fix: Multiply default rate by loss given default, which is 1 minus recovery.
Counting both expected losses in the cash flows and a higher spread for credit risk.
Both seem to represent credit risk.
Fix: Pick one approach. If cash flows already reflect expected defaults, discount at a lower rate.
Accepting reported IRR as a precise return.
The figure looks exact.
Fix: Remember it depends on estimated NAV, is money-weighted, and can be affected by timing and subscription lines. Say so when asked to evaluate.

Worked examples

Example 1

A private lender holds a 2-year loan with a par value of ₹10,00,00,000 and an annual coupon of 9%, paid at year end, with principal repaid at the end of year 2. Because of the borrower's weaker credit and market conditions, the appropriate discount rate is now 11%. Calculate the fair value of the loan.

Show the solution

Annual interest = 9% × ₹10,00,00,000 = ₹90,00,000.
Year 1 cash flow = ₹90,00,000. PV = 90,00,000 ÷ 1.11 = ₹81,08,108.
Year 2 cash flow = ₹90,00,000 + ₹10,00,00,000 = ₹10,90,00,000.
PV of year 2 = 10,90,00,000 ÷ (1.11)^2 = 10,90,00,000 ÷ 1.2321 = ₹8,84,65,000 (rounded).
Fair value = 81,08,108 + 8,84,65,000 ≈ ₹9,65,73,000.

Answer: Fair value is about ₹9,65,73,000, roughly 3.4% below par, because the discount rate of 11% exceeds the coupon of 9%.

Example 2

A private debt fund has an expected annual default rate of 4% on its portfolio, with a recovery rate of 60% on defaulted loans. The portfolio's gross yield is 10%. Calculate the expected loss rate and the approximate net credit yield.

Show the solution

Loss given default = 1 − 60% = 40%.
Expected loss rate = default rate × LGD = 4% × 40% = 1.6%.
Net credit yield ≈ gross yield − expected loss rate = 10% − 1.6% = 8.4%.

Answer: Expected loss rate is 1.6% a year and the approximate net credit yield is 8.4%, before management fees and carried interest.

Exam tips

Show the discount rate build-up and each discounted cash flow. A correct number typed alone earns full credit on a calculation, but written steps protect you if you make an error in a multi-part question.
When asked to 'justify' a valuation change, name the driver: spread widening, credit deterioration or illiquidity, and say which direction value moves.
Link recovery to seniority and collateral. Senior secured loans usually recover more than mezzanine.
If asked to evaluate reported IRR, mention reliance on estimated NAV and the money-weighted nature of IRR.
Answer only the number of points asked for, in the order given.

Private Debt Valuation and Performance Measurement in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

Private Debt Valuation and Performance Measurement: frequently asked questions

How are private loans valued when there is no market price?

Managers usually use discounted cash flow. They discount expected interest and principal at a rate made up of the base rate, a credit spread and an illiquidity premium. They may cross-check with recent trades, origination price and collateral value.

How do I calculate IRR for a private debt fund?

List contributions as negative cash flows and distributions as positive ones. Add the ending NAV as a final positive flow. Then find the rate that makes the present value of all flows equal zero. In the exam, you can often test the given answer choices.

What loss metrics matter in private debt?

The key ones are default rate, recovery rate and loss rate. Loss rate equals default rate times loss given default. Comparing yield with loss rate shows the return after credit losses.

Does a rise in interest rates cut the value of a floating-rate private loan?

Usually only slightly, because the coupon resets with the reference rate. Value is driven more by changes in credit spreads and borrower credit quality.