Net Present Value

Net Present Value (NPV) is the foundational valuation metric that tells a note investor whether a deal will create or destroy value at a given purchase price. It works by discounting all expected future cash flows back to today's dollars using a chosen discount rate, then subtracting the acquisition cost. A positive NPV means the investment is expected to return more than the investor's required rate of return; a negative NPV means the asking price is too high relative to the projected cash flows and risk.

The NPV Formula

The basic NPV calculation for a mortgage note is:

NPV = Sum of [Cash Flow / (1 + r)^n] - Purchase Price

Where:

• Cash Flow = the expected payment received in each period
• r = the discount rate (your required rate of return per period)
• n = the number of periods until that payment is received
• Purchase Price = your total acquisition cost including acquisition costs

For a performing note with 120 remaining payments of $500 and a required annual return of 12% (1% monthly), you would discount each of those 120 payments back to today and sum them. If that sum exceeds your purchase price, the NPV is positive and the deal meets your return threshold.

NPV vs. IRR

Note investors typically use NPV alongside Internal Rate of Return (IRR), but the two metrics answer different questions:

NPV's advantage is that it produces a dollar figure, making it especially useful when comparing notes of different sizes. A $50,000 UPB note and a $150,000 UPB note might both show a 15% IRR, but the NPV reveals that the larger note generates substantially more absolute value.

Applying NPV to Performing Notes

For performing notes, the cash flows are relatively predictable — the borrower is making regular payments. The key inputs are:

• Monthly payment amount from the promissory note
• Remaining term (number of payments left)
• Discount rate reflecting your minimum acceptable return
• Prepayment assumptions — borrowers may refinance or pay off early, shortening the cash flow stream but returning principal sooner

A common approach: model three scenarios (full term, early payoff at year 3, early payoff at year 5) and check that NPV remains positive in each case. If early payoff produces a negative NPV, your purchase price may be too high.

Applying NPV to Non-Performing Notes

Non-performing notes are harder to model because cash flows are uncertain. Investors must estimate the probability and timing of different exit strategies:

• Re-performance — Borrower begins paying again after a loan modification or forbearance agreement
• Short sale or payoff — Borrower sells the property or a third party purchases the debt
• Foreclosure — Property is taken and sold, with proceeds as the terminal cash flow
• Note sale — Investor resells the note after some value-add work

Each scenario has a different expected cash flow and timeline. Many investors calculate a probability-weighted NPV by assigning likelihoods to each outcome and blending the results. For example, if there is a 40% chance of re-performance generating an NPV of $12,000 and a 60% chance of foreclosure generating an NPV of $5,000, the blended NPV would be $7,800.

Choosing the Right Discount Rate

The discount rate is the most subjective input in the NPV calculation, and it drives the result more than any other variable. Most note investors use rates between 10% and 20%, depending on the asset's risk profile. Performing first-lien notes in strong markets warrant lower rates; non-performing seconds in declining markets demand higher ones. The discount rate should reflect your opportunity cost — the return you could earn on the next-best alternative use of that capital. If your NPV turns negative with a modest increase in the discount rate, the deal has a thin margin of safety.