How Interest Rates Affect Cap Rates

How interest rates affect cap rates is a pricing story with a delay, not a switch that moves both numbers the same day. A cap rate is net operating income divided by price. Interest rates are the cost of money in the market and, for a financed buyer, the cost of the loan. When investors can earn more on safe paper, they tend to demand more yield on a building, which means a higher cap rate and a lower price for the same income. They do not always get that yield on the Tuesday after a policy meeting. Sellers argue, leases are already signed, and comps take months to print. The direction is the lesson. The lag is why people think the relationship “broke” in the middle of a cycle.

Illustrations are not a rate quote or a prediction. An inquiry is not an approval.

How Interest Rates Affect Cap Rates Through the Required Yield

Write the identity before the narrative.

Value = NOI ÷ cap rate

If NOI stays $100,000 and the cap rate moves from 6 percent to 7 percent, value moves from about $1,666,667 to about $1,428,571. That is roughly $238,000, or about 14 percent, off the price, from a one-point move in the cap rate. Nothing happened to the tenants. The market decided the income was worth a higher yield. Interest rates are a major reason that decision shows up, because a buyer who borrows, and a buyer who could have bought a Treasury instead, both compare the building with the return on money.

The Federal Reserve H.15 release publishes Treasury yields and other selected rates that investors use as that comparison. A 10-year Treasury is not a cap rate. It has no vacancy, no roof, and no tenant. The cap rate sits above a risk-free yield by a spread that covers those risks, illiquidity, and whatever else buyers insist on that year. If the Treasury yield rises and the spread stays constant, the cap rate rises. If lenders tighten and also demand a wider spread, the cap rate can rise by more than the Treasury move. If buyers are desperate for a specific building and accept a thinner spread, the cap rate can lag. All three happen. The formula does not care which story you prefer. It reprices NOI at whatever cap rate the next buyer will pay.

Debt reinforces the same move. A higher loan rate raises the mortgage constant, annual debt service divided by the loan amount. If the constant climbs above the cap rate, leverage stops helping the equity yield. Buyers who notice will either pay less, so the cap rate rises until the deal works, or they will borrow less and still lean on the seller to cut the price. That feedback is negative leverage showing up in the bid. The constant itself is defined in the mortgage constant article. You need both pages: one for the asset yield, one for the debt yield.

Why the Building Does Not Reprice Overnight

Caps and coupons move on different clocks.

Leases already in place keep NOI from jumping just because the Federal Reserve moved. A flat lease is a flat lease. The buyer’s required yield can change while the tenant’s rent cannot. Value then absorbs the rate move almost entirely through the cap rate, which is why sellers feel the offer fall “for no operating reason.”

Comps are slow. A closed sale negotiated six months ago used the rates and the fear of that season. Appraisers and buyers lean on those comps until new ones exist. You can be in a higher-rate world with a stack of lower-cap sales still on the brochure. Underwrite the rate you will close with, not the cap rate on a sale that was locked when money was cheaper.

Sellers anchor. Listing prices follow the last peak longer than bids do. The spread between ask and a rate-aware bid is not a personal insult. It is the lag. Some of those listings never trade. The ones that trade are the cap-rate evidence for the next file.

Property type matters. A one-year residential rental can reset income faster than a long net lease, so NOI growth can offset part of a cap-rate expansion. A bond-like lease with small bumps behaves more like a fixed-income instrument: when yields in the bond market rise, the lease’s price should fall unless the tenant got safer. Multifamily, retail, and a single-tenant building do not share one cap rate just because they share a zip code.

Cap rate versus cash-on-cash is how you keep the unlevered move and the levered move apart. Rates can widen the cap rate a little and wreck cash-on-cash a lot if you are highly leveraged at a floating coupon. Or they can widen the cap rate while a fixed loan you already closed stays comfortable. New buyers and existing owners are not in the same trade.

A Buyer’s Worksheet When Rates Have Moved

Use the same NOI three ways so you can see what rates are doing.

1. Seller’s cap rate. Their price divided into the NOI they advertise. Treat the NOI with suspicion, then compute it anyway so you know the ask.
2. Your cap rate. The price you will pay divided into NOI you believe after a vacancy and a repair reserve. If this is below what a financed buyer needs given today’s debt cost, you are volunteering negative leverage.
3. A rate-shift case. Add half a point and a full point to your cap rate and divide NOI again. If you must sell or refinance inside a short window, this case is not academic. The $100,000 NOI example above is the scale: one point was about 14 percent of value.

Then put the loan beside it, not inside it. Debt service does not belong in the cap rate. It belongs in cash-on-cash and in the coverage ratio. Investors double-count interest by capitalizing NOI after debt service and calling the result a cap rate. That number is not comparable to any comp. Keep NOI unlevered. Let the loan live in its own ratio.

Floating-rate debt makes the worksheet expire. A cap rate you accepted because the initial coupon was teaser-priced will look foolish when the coupon resets and you are the owner who cannot raise rent. Fixed versus floating is the financing choice that decides whether a later rate move hits your payment or only the theoretical resale cap rate.

What Not to Conclude

Do not conclude that every rate cut produces a higher price on your building. If NOI falls at the same time, because a recession took a tenant, value can drop while rates drop. Cap rate and income move together in the formula. A smaller denominator does not save a collapsed numerator.

Do not conclude that you should wait forever for the old cap rate to return. The old cap rate was a price of money plus a spread. If the price of money has reset, the old comp is a souvenir. Buying at a cap rate that fits the constant you can actually get is how you stop arguing with the last cycle.

Do not use a national average cap rate as your offer. Averages mix property types and vintages. Your tenant, your lease term, and your expenses are the NOI. The rate environment is only the pressure on the denominator.

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Frequently Asked Questions

Do cap rates rise one-for-one with interest rates?

Not reliably. Cap rates often move in the same direction as required yields, with a lag, and the spread over Treasuries can widen or narrow at the same time. Use value equals NOI divided by the cap rate on your building instead of a rule that the two series match.

If my loan is fixed, do cap rates still matter?

Yes, if you care about value, a refinance, or a sale. A fixed payment protects cash flow from a higher coupon and does not stop the next buyer from using a higher cap rate. Your equity at exit can shrink even while this year’s payment is unchanged.

Should I put debt service into the cap rate?

No. Cap rate uses unlevered NOI and price, and debt service belongs in cash-on-cash, the mortgage constant, and the coverage ratio. Mixing interest into the cap rate makes the result incomparable with sales comps, which are also unlevered. Keep the ratios separate so a rate move is not counted twice.

Can rising NOI cancel a higher cap rate?

It can, if income rises as fast as the cap rate expands. A modest NOI increase does not fully cancel a full point of cap-rate expansion on a low starting cap, which is what the $100,000 example is for. Run both moves, and do not assume rent growth is owed to you because rates rose.

Does understanding this guarantee a loan at a given rate?

No. Cap rates are a pricing language for the property, and loan pricing is set on a specific file. This page does not quote rates or promise approval. Compare the cap rate with the mortgage constant before you treat leverage as helpful.