Stop Packing the Cap Rate: Quantify the Lease, Don’t Guess It

by | Nov 3, 2026 | Uncategorized

Cap rate packing is what appraisers do when they lack the tools to measure a lease. There is a better way, and it is now faster than the shortcut.

A recent article from a respected national appraisal firm walks through the triple-net proforma. Much of it is sound advice. Benchmark expenses against the market. Check the concluded value against the assessment. Test the income approach against the sales comparison approach. Reverse the math to see what rent a client’s target value would require.

But at the center of it sits a shortcut every MAI has used. When contract rent sits below market, lower the cap rate. When leases lock rent in for years, build the proforma on something other than market rent. It is the most common move in the income approach, and it is the one move nobody can show their work on.

The problem with packing the cap rate

A capitalization rate measures the risk and return the market accepts for a stabilized income stream. When we nudge it to absorb a specific lease, we fold two different things into one number: market risk and a lease-specific income difference. Once they are blended, neither can be measured.

Then comes the question no appraiser can answer: how much? Twenty-five basis points? Fifty? The same article shows why it matters. At a 7.0% rate, each 25 basis points moved value by about $7.00 per square foot. An unsupported 50-basis-point “lease adjustment” is roughly a $14 per square foot judgment call with no math behind it.

Packing also blurs the property rights being appraised. Is the conclusion fee simple or leased fee? When the lease effect is buried in the rate, the reader cannot tell, and often neither can the appraiser.

A stabilized NOI is a market NOI

The same article goes a step further. It suggests that when leases lock rent in, the proforma should be built on something other than market rent. That is not a stabilized income and expense statement. “Stabilized” means market rent, market vacancy and typical terms. An NOI built on contract rent is a contradiction in terms, whatever the column header says.

To be fair, capitalizing contract rent is a recognized leased fee technique. A 2023 peer-reviewed article in The Appraisal Journal, reprinted from an Appraisal Institute book, describes direct capitalization of the leased fee using contract rent and a rate from leased fee sales. But it is a leased fee capitalization, labeled as one, with leased fee rates. It is not a stabilized NOI.

The same Appraisal Journal article also says where that shortcut fails. Direct capitalization breaks down when the remaining lease term is short and rent is likely to change. It names discounted cash flow as the preferred technique when rent is irregular or leases expire within roughly 10 years. A five-tenant retail center with terms of three to ten years is that case exactly. Feeding contract rent into the NOI and then adjusting the cap rate moves both inputs at once, and neither can be audited.

There is a deeper problem. Pairing a contract-rent NOI with cap rates from leased fee sales assumes the subject’s leases resemble the comps’ leases. But the appraiser rarely knows the comps’ lease terms: each tenant’s rent relative to market, remaining term, escalations, renewal odds. The rate is extracted from a rent roll nobody has seen and applied to one that is different. That is neither transparent nor defensible, and under cross-examination it invites impeachment.

The usual reply is that appraisers must reflect how market participants analyze a property, and some buyers do use the napkin. But the market value definition assumes a buyer who is well informed or well advised. Clients hire appraisers to analyze the property the way the most sophisticated, best-informed participant for that property type would, not the least sophisticated one. Copying a shortcut because some buyers use it is not reflecting the market. It is lowering the standard.

The same logic applies to yield capitalization. Some argue that if buyers of a property type quote only cap rates, the appraiser need not run a DCF. That confuses how much weight a method gets with whether it should be used at all. Every cap rate already embeds a yield rate and an assumed pattern of income and value change. The DCF simply makes those hidden assumptions explicit so they can be tested. Some problems cannot be solved without it: staggered leases, rent above or below market, lease-up, cost to stabilize and renewal probability all change over time, and a single year of income cannot measure them. USPAP asks for the approaches necessary to produce credible results within the scope of work, not the approaches the least rigorous buyer happens to use. Market behavior properly guides reconciliation weighting. It does not excuse leaving out the analysis that makes the conclusion defensible.

Fee simple first, always

The fix starts by separating the questions. First, value the property in fee simple equivalency. Every tenant pays current market rent. Every lease term starts on the date of value, on terms typical for the market. Vacancy, collection loss and the probability of renewal are what is typical in the property’s marketplace.

Under those assumptions, all four approaches stand on the same footing: cost, sales comparison, direct capitalization and yield capitalization. Direct cap uses next year’s NOI at current market rent, never contract rent. The four indications should land close together. The reconciled stabilized value is the optimal value under current market conditions and typical lease terms.

One discipline matters here. Most comparable sales are leased fee transactions, so the rates extracted from them carry their own lease effects. Adjust those comps to market-lease equivalency before extracting a cap rate, or the packing problem comes back in through the back door.

Then measure the leases, don’t guess them

Only now does the appraiser turn to the seasoned leases. Project the fee simple cash flows over a typical holding period. Project the leased fee cash flows over the same period from the actual leases: contract rents, escalations, expirations and each tenant’s probability of renewal. Take the difference year by year and discount it.

Article content

The discount rate is customized to the risk of the difference itself. A below-market lease is low risk: the tenant has every reason to stay and pay. An above-market lease is higher risk: the tenant may default or leave at expiration. One rate for both directions is another form of packing.

This is not a fringe idea. The same Appraisal Journal article discounts a below-market lease period at a lower rate than the less certain years after it, a split-rate approach. For a lease out of line with market, it describes valuing the fee simple interest, then discounting the difference between contract and market rent over the period it is expected to be paid. That is the method here. The profession’s own literature already points to it. What has been missing are tools that make it as fast as the napkin.

Take a 10,000 SF tenant paying $18.00 per square foot NNN with four years left, against a market rent of $22.00. The shortfall is $40,000 a year.

Article content

The rent loss is about $138,600, or $13.86 per square foot, deducted from the reconciled fee simple value. At expiration the space rolls to market and the difference ends. The illustrative 6% rate sits below the property’s overall rate because the shortfall is the low-risk side of the lease.

In this case the answer lands near what a 50-basis-point packing adjustment might produce. That is the point. One number is calculated from the lease. The other is chosen. Apply the same method tenant by tenant to the article’s five-tenant retail center, and every lease gets its own line, its own expiration and its own renewal probability. No cap rate adjustment is needed.

What happens in the courtroom

Picture two appraisers on the same property in litigation. Appraiser A lowered the cap rate 50 basis points because the leases are below market. Appraiser B valued the property in fee simple across all four approaches, then measured each lease’s rent loss and discounted it at a supported rate.

Opposing counsel asks Appraiser A one question: why 50 basis points and not 35? The only honest answer is judgment and experience. There is no calculation to point to, no sensitivity test, no lease-by-lease support.

Appraiser B walks the court through every number. Market rent, contract rent, the expiration dates, the renewal probability, the discount rate and why it was chosen. Change any input and the result moves in a way anyone can follow. In that room, an appraiser who packed the cap rate is at an extreme disadvantage. If it isn’t defensible, it isn’t a value.

The stabilized value is only the starting point

Everything above concerns a stabilized property, but it is also the foundation for every other value an assignment may need. Once the appraiser triangulates and reconciles the stabilized fee simple value, the downstream waypoint values follow from it:

  • Non-stabilized market value. The cost and time to reach stabilization, measured and discounted, rather than guessed as a lump-sum deduction.
  • Financial feasibility for proposed development. If a proposed project is not feasible today, the appraiser can add a holding period until feasibility can be demonstrated. That holding period produces the property’s “as is” market value when it is not ready for immediate development.
  • Highest and best use. The land or property residual shows which use produces the highest current value, so highest and best use is demonstrated with numbers, not asserted in a paragraph.
  • Subdivisions. The bulk or wholesale value of existing or proposed finished lots or units, the feasibility of the proposed subdivision, and the “as is” land value whether the project is feasible or not.

On the napkin, each of these is a separate exercise with its own shortcuts. Built on a reconciled stabilized value, they are internally consistent by design, and every one can be traced back to the same market evidence.

Why deterministic matters now

AI and automated valuation models are moving into our work. The profession’s best defense is not to resist them. It is to offer something they cannot: a valuation the appraiser fully controls, where every number traces to market evidence and professional judgment, and where the same inputs always produce the same result.

That is why SmartVal is deterministic. No AI or black-box model touches the valuation methodology. AI handles the edges, such as digesting due diligence and drafting the report, while the appraiser stays in control of every assumption and judgment. An AVM gives a number it cannot fully explain. A deterministic model gives a value the appraiser can defend line by line, in front of a lender, a reviewer or a judge.

Black-box outputs will only become more common, and a profession still working on the napkin will have a hard time showing why it deserves to be paid more. If we adopt transparent, deterministic tools now, before AI becomes entrenched, the appraiser’s judgment becomes the product again. We need to move fast.

Why the napkin survives, and why it doesn’t have to

Appraisers don’t pack cap rates because they believe it is better. They do it because the rigorous version takes hours by hand. Every tenant, every scenario, every spreadsheet rebuilt when the client asks “what if.” Under deadline, the shortcut wins.

ValueXpose was built to remove that tradeoff. Its SmartVal engine is deterministic at the core, with AI only at the edges:

  • Fee simple first. Cost, sales comparison, direct cap and yield cap are developed on the same market-lease footing and reconciled.
  • Rent loss and intangible value from the rent roll. Each lease is modeled against market, with its own renewal probability and discount rate.
  • Reverse-engineered rates. Every approach and the reconciled value are run back through the yield cap timeline to derive implied going-in and going-out cap rates. The article’s “reverse the proforma” test, done for every approach at once.
  • Scenarios that reproduce. Change the cap rate, market rent, vacancy or a tenant’s renewal odds, save the scenario, and re-run it with identical results every time.
  • Value Sustainability Analysis. A patent-pending test of whether a well-supported market value will hold up over a typical holding period.

The result is faster than the napkin and far more defensible: a valuation the same day the due diligence arrives, with every number traceable.

There is a bigger issue behind all of this. Passing shortcuts like these to the next generation of appraisers, at a time when underwriters, AI agents, waivers and hybrid products compete for the same work, puts the profession and its fees at risk. That is the subject of my next article.

If your next assignment has seasoned leases, or might end up in front of a judge, let’s run it through SmartVal together. Ask me about a pilot on a live assignment.

Sources