What Are Cap Rate Compression and Expansion?

Key Takeaways

• Compression means falling cap rates and rising values for the same income; expansion means rising cap rates and falling values, even if rent never changes.
• The percentage change in value equals the old cap rate divided by the new cap rate, minus one, holding net operating income constant.
• Northmarq reported single-tenant retail cap rates at 6.85% in Q2 2026, up 125 basis points from a 5.60% low in Q4 2022.
• Compression helps sellers and owners who bought earlier; expansion helps new buyers but hurts anyone who must sell or refinance into it.
• Exit cap rate risk is the chance that cap rates are higher when you sell than when you bought, which can offset years of rent growth.

Value of $200,000 NOI at the 2022 low and at Q2 2026 cap rates

	Value of $200,000 NOI
5.60% (Q4 2022 low)	$3.6M
6.85% (Q2 2026)	$2.9M

Illustrative arithmetic to show the mechanism, not market data.

What compression and expansion mean

Cap rate compression is a market-wide or property-specific fall in the cap rate buyers require; expansion is a rise. Because value is net operating income divided by the cap rate, the two words describe changes in price that happen without any change in the property's income.

The terms apply at three levels. A market can compress or expand, as when interest rates move. A category can, as when a tenant's credit weakens and every property leased to it reprices. And a single property can, most commonly because its remaining lease term gets shorter every year. An owner can experience expansion on one property while the broader market compresses.

Movements are quoted in basis points. One basis point is one hundredth of a percentage point, so a move from 6.50% to 6.75% is 25 basis points of expansion.

The math: how much value moves

Holding NOI constant, the percentage change in value equals the old cap rate divided by the new one, minus one. Small moves matter: at a 6.5% starting cap rate, each 25 basis points of expansion removes roughly 3.6% to 3.7% of value, and the effect is larger the lower the starting cap rate.

Hypothetical: $200,000 of NOI bought at a 6.50% cap rate ($3,076,923)

New cap rate	Move	Value	Change in value
6.25%	25 bps compression	$3,200,000	+4.0%
6.50%	None	$3,076,923	0.0%
6.75%	25 bps expansion	$2,962,963	-3.7%
7.00%	50 bps expansion	$2,857,143	-7.1%

The recent cycle shows the same math at scale. Northmarq's Q2 2026 single-tenant retail snapshot reports an average cap rate of 6.85%, up 125 basis points from the 5.60% low of the fourth quarter of 2022. Applied to a hypothetical $200,000 of NOI, that is the difference between a $3,571,429 value and a $2,919,708 value, a decline of about 18% with no change in rent. Owners who bought at the 2022 low needed several years of rent increases just to stand still.

What drives cap rates up or down

Cap rates move when the return investors require from real estate changes. Interest rates are the largest single input, but investor demand, the supply of properties for sale, lender appetite and tenant-specific news all move cap rates, and they do not always move together.

• Interest rates. Higher Treasury yields make bonds more competitive with net lease income and raise borrowing costs, which pushes cap rates up. The 10-year Treasury yield was 5.18% on September 24, 2026, per the Federal Reserve's H.15 release, up from roughly 4.40% during Q2 2026 as reported by the Boulder Group.
• Supply of listings. More properties competing for the same buyers pressures pricing. The Boulder Group counted about 5,800 single-tenant net lease properties on the market in Q2 2026, up 12.5% from the prior quarter.
• Buyer mix and demand. 1031 exchange buyers facing deadlines, institutions allocating to net lease and private capital all bid differently, and heavy competition for scarce long-term investment-grade leases keeps those cap rates tight.
• Tenant credit. A downgrade, a bankruptcy filing or a take-private deal can expand cap rates across every property leased to that tenant.
• Lease term. Shorter remaining term means higher cap rates, so a property expands on its own as the lease runs down.

For how the rate environment feeds through to pricing, see interest rates and cap rates.

What it means for a buyer and for a seller

Compression and expansion shift value between the two sides of a trade. A buyer in an expanding market pays less for each dollar of income but takes the risk that expansion continues after closing. A seller in a compressing market captures a gain the property did not earn through operations, and gives up the income that went with it.

For a buyer, expansion means higher starting yield and, often, better positive leverage relative to loan costs. The risk is buying into a trend still underway. A buyer who assumes compression will return is making an interest rate forecast, and the underwriting should show that the deal works without it.

For a seller, compression is a windfall and expansion is a cost that arrives all at once at sale. Owners who must sell or refinance on a fixed schedule, such as closed-end funds nearing the end of their term or borrowers with maturing loans, have the least ability to wait out expansion. Owners with long-term, low-leverage holds can wait for spreads to settle, provided the tenant keeps paying.

Exit cap rate risk

Exit cap rate risk is the risk that the cap rate when you sell is higher than the one you bought at. For a net lease property, where rent growth is modest and fixed, a higher exit cap rate can erase most of the appreciation that years of scheduled rent increases would otherwise produce.

In this hypothetical, an investor buys $200,000 of NOI at a 6.50% cap rate for $3,076,923. Rent rises 1.5% a year, so NOI reaches about $232,108 when the property is sold ten years later.

Hypothetical: sale value after 10 years at different exit cap rates

Exit cap rate	Sale value	Gain over purchase price
6.50% (same as entry)	$3,570,895	+16.1%
7.00% (50 bps higher)	$3,315,831	+7.8%
7.50% (100 bps higher)	$3,094,776	+0.6%

A 100 basis point higher exit cap rate wipes out essentially all of a decade's rent growth in this example. The risk compounds with lease term: after ten years the lease is ten years shorter, and shorter leases trade at higher cap rates even if markets are unchanged. That is why careful underwriting assumes an exit cap rate above the entry cap rate. See the exit cap rate assumption and how the result flows into IRR and equity multiple.

Common mistakes

The most frequent errors come from treating a cap rate as fixed. A pro forma that holds the exit cap rate equal to today's, or lower, is quietly assuming the market will be at least as generous at sale as it is now.

• Underwriting compression. Projected returns that depend on selling at a lower cap rate than the purchase cap rate are a bet on rates and demand, not on the property.
• Ignoring term burn-off. Using a market-average exit cap rate for a property that will have a short remaining term at sale overstates exit value.
• Confusing survey movement with property movement. A market average that moved 125 basis points does not mean every property did. Long-term investment-grade leases and short-term non-rated leases can move very differently.
• Forgetting the loan. With debt, expansion hits equity harder than the property, because the loan balance does not fall with value.

Frequently Asked Questions

Q: Is cap rate compression good or bad?

A: It depends on your position. Compression raises the value of existing properties, which helps owners and sellers. It also lowers the starting yield for new buyers, who pay more for each dollar of income.

Q: How much have net lease cap rates expanded since 2022?

A: Northmarq reported the average single-tenant retail cap rate at 6.85% in Q2 2026, 125 basis points above the 5.60% low recorded in the fourth quarter of 2022.

Q: Do cap rates move one for one with interest rates?

A: No. Rising Treasury yields and loan rates push cap rates up over time, but the spread between cap rates and bond yields also changes with investor demand, property supply and lender appetite, so the two can diverge for long stretches.

Q: What is a reasonable exit cap rate assumption?

A: Practitioners commonly assume an exit cap rate above the purchase cap rate, reflecting a shorter remaining lease at sale and uncertainty about future rates. The right spread depends on how much lease term will remain and on the tenant's credit.

Q: Can a single property's cap rate expand while the market compresses?

A: Yes. As its lease term runs down, or if the tenant's credit weakens, a property can reprice to a higher cap rate even when market averages are falling.

Sources

1. Northmarq, Single-Tenant Retail Market Snapshot, Q2 2026
2. The Boulder Group, Net Lease Market Report Q2 2026 (July 2026)
3. Federal Reserve, H.15 Selected Interest Rates (September 25, 2026 release)

This page is for informational purposes only and is not an offer to sell or a solicitation of an offer to buy any security, nor investment, tax, or legal advice. Examples are hypothetical unless a source is cited. Consult your own advisors about your situation.