Cap Rate vs Cash on Cash: Which Return Metric to Trust

Cap rate tells you what a building earns. Cash-on-cash return tells you what you earn. Cap rate is unlevered: net operating income (NOI) divided by price, with no mortgage in the picture. Cash-on-cash is levered: your annual cash flow after debt service, divided by the cash you actually put in. Use cap rate to price and compare properties. Use cash-on-cash to decide whether a specific deal, with your specific loan, is worth your money.

That is the short answer. The useful part is seeing how the two numbers drift apart once debt enters the deal, and what that means when you are underwriting a 20-unit building instead of reading a definition.

TL;DR

• Cap rate = NOI ÷ purchase price. It ignores financing, so it is the right tool for comparing buildings and markets.
• Cash-on-cash = (NOI − annual debt service) ÷ total cash invested. It reflects your loan, so it is the right tool for judging your own return.
• When the cap rate is higher than your cost of debt, leverage lifts cash-on-cash. When it is lower, leverage drags it down.
• Neither number includes appreciation, loan paydown or depreciation. For a full picture you also need IRR and an after-tax view.
• Run both on every deal, and stress test them before you make an offer.

Table of Contents

• The two formulas side by side
• A worked example: a 20-unit building
• When to use cap rate
• When to use cash-on-cash
• How leverage moves the gap between the two
• What is a good cap rate or cash-on-cash return?
• Where IRR fits
• The tax layer high earners should not skip
• Our perspective
• Run the numbers on a real deal
• A quick checklist before you make an offer
• FAQ
• Sources

The two formulas side by side

Both metrics start with NOI. That is gross scheduled income, minus vacancy and credit loss, minus operating expenses. Mortgage payments and depreciation are not part of NOI, which is why cap rate stays clean of financing choices.

The MIT real estate finance lecture notes on leverage frame cash-on-cash the same way: a return on equity that explicitly depends on how the purchase is financed.

One detail trips up new investors. “Total cash invested” is more than the down payment. Count closing costs, lender fees, and any capital you must spend right away on deferred maintenance or unit turns. Leave those out and your cash-on-cash looks better than it is.

A worked example: a 20-unit building

The numbers below are hypothetical, built to show the mechanics. Your deal will differ.

You are looking at a 20-unit building priced at $2,000,000 with $120,000 of NOI.

Cap rate: $120,000 ÷ $2,000,000 = 6.0%.

Now add a loan: 75% loan-to-value ($1,500,000), a 6.5% interest rate and a 30-year amortization. Annual debt service comes to roughly $113,800.

• Down payment: $500,000
• Closing costs and lender fees (assumed): $40,000
• Total cash invested: $540,000
• Annual cash flow: $120,000 − $113,800 = $6,200

Cash-on-cash: $6,200 ÷ $540,000 ≈ 1.1%.

Same building, same NOI. A 6.0% cap rate became a 1.1% cash-on-cash return because the debt costs more than the property yields. That is negative leverage, and it is the single most important thing this comparison teaches.

Now suppose you buy it, renovate, and push NOI to $150,000 through better management and rent increases. Debt service stays at $113,800.

• Cash flow: $150,000 − $113,800 = $36,200
• Cash-on-cash: $36,200 ÷ $540,000 ≈ 6.7%

The cap rate on your original price is now 7.5%, higher than your 6.5% loan rate, so leverage works for you. This is why value-add investors care less about the going-in cap rate than about the cap rate they can create.

When to use cap rate

Cap rate answers one question: what is this asset priced at, relative to the income it produces?

• Comparing buildings. Two properties in different submarkets can be ranked quickly on cap rate, because financing does not distort it.
• Checking the price. If comparable sales trade at a 5.5% cap rate and the seller wants a price that implies 4.5%, you know you would be paying a premium.
• Estimating value. Divide NOI by the market cap rate to see what the income stream should be worth. This is also how many lenders and appraisers think about commercial value.
• Understanding what cash buyers see. An investor buying apartment buildings with all cash earns exactly the cap rate on day one, since there is no debt service to subtract.

For market context, the Newmark 3Q25 U.S. multifamily capital markets report put transactional cap rates at 5.63%, up 13 basis points from the prior quarter. Treat any average as a starting reference. Your market, asset class and vintage will move the number, so pull fresh comps before you underwrite.

When to use cash-on-cash

Cash-on-cash is your performance metric. It answers: given the money I am wiring and the loan I am taking, what do I get paid in cash each year?

• Comparing financing options. The same building under a bank loan, an agency loan or seller financing produces different cash-on-cash returns. Our guide to multifamily financing options for 2–4 vs. 5+ units walks through how those structures differ.
• Setting income targets. If you want the property to pay you $30,000 a year in distributions, work backward to the cash invested that makes it possible.
• Ranking deals against each other. When two deals need different amounts of equity, cash-on-cash shows which one puts your capital to better use.

According to the Harvard Graduate School of Design’s real estate finance program, calculating the primary components of return in income-producing property includes cash flow, tax benefits and the future sale. Cash-on-cash captures only the first of those, which is why it should never be the only number on your page.

How leverage moves the gap between the two

The gap between cap rate and cash-on-cash is a leverage story. The MIT lecture notes linked above cover the mechanics: debt boosts equity returns only when the asset’s return exceeds the cost of that debt.

• Positive leverage: cap rate is above your interest rate (more precisely, above your loan constant, which includes principal). Borrowing raises cash-on-cash.
• Negative leverage: cap rate is below your debt cost. Borrowing lowers cash-on-cash and can turn cash flow negative.

The rate environment matters here. When the Federal Reserve cut to a range of 3.75% to 4% in October 2025, Multifamily Dive reported that short-term borrowing costs eased while long-term rates stayed elevated and the immediate effect on cap rates was limited. The same report cited a multifamily CMBS delinquency rate of 7.12% as of October 2025. For you, the lesson is practical: do not count on market-wide cap rate compression to rescue a thin deal. Careful asset selection and debt structure matter more.

The temptation is to chase a high cash-on-cash by borrowing as much as possible. Resist it. A highly levered deal has no cushion if occupancy dips or your rate resets higher. Test your cash-on-cash with vacancy 5 points worse and your interest rate 1 point higher. If it goes negative, the deal is fragile.

What is a good cap rate or cash-on-cash return?

Readers ask whether 6% or 7.5% is a good cap rate, or whether 7% or 12% is a good cash-on-cash. There is no universal answer, and anyone who gives you one is skipping the context.

• A cap rate is only “good” relative to risk and price. Lower cap rates usually mean stronger markets, newer buildings and lower perceived risk. Higher cap rates usually mean more risk, more work or weaker locations.
• A cash-on-cash target is only “good” relative to your alternatives. Compare it to what you could earn elsewhere with similar risk and liquidity, and to your own cost of capital.
• Both depend on the plan. A stabilized building may deliver modest cash-on-cash from day one. A value-add deal may start thin and climb as NOI grows.

So instead of asking whether a number is good, ask three questions. Is the cap rate in line with recent comparable sales? Does cash-on-cash beat my next-best use of this capital? Does the deal still work when I stress it?

Where IRR fits

Cap rate and cash-on-cash are snapshots of a single year. IRR, the internal rate of return, measures the whole hold: annual cash flow, the sale proceeds, and the timing of every dollar. It captures what the other two cannot, including appreciation, loan paydown and the effect of a refinance.

A practical way to use all three:

1. Cap rate to decide whether the price is fair.
2. Cash-on-cash to decide whether the year-one income meets your needs.
3. IRR (and equity multiple) to decide whether the full business plan is worth the hold period.

A deal with a modest cash-on-cash and a strong IRR is typical of value-add: you give up some early income to earn more at exit. A deal with a strong cash-on-cash and a weak IRR is often a stable but slow-growth asset. Neither is better by default. It depends on what you need the money to do.

The tax layer high earners should not skip

Cash-on-cash is a pre-tax figure. For a high earner, the after-tax picture can look very different, because depreciation can reduce taxable income from the property.

There are limits. The IRS passive activity rules, explained in Publication 925, restrict how losses from rental activities can offset other income. Qualifying as a real estate professional requires meeting specific hour and participation tests, including more than 750 hours in real estate trades or businesses during the year. Those rules are technical and depend on your situation.

Before you count on any tax benefit, sit down with a CPA who works with real estate investors. If depreciation is part of your plan, our breakdown of bonus depreciation rules for multifamily investors in 2026 gives you the questions to bring to that conversation.

Our perspective

We see the same mistake from new investors again and again: they fall in love with one number. Some chase the highest cap rate they can find and end up with a tired building in a weak market. Others chase the highest cash-on-cash and stack on debt until one bad quarter erases the cushion.

Our view is simple. Cap rate keeps you honest about price. Cash-on-cash keeps you honest about your capital. Neither replaces a real underwriting model with rent comps, expense assumptions, a debt structure and a downside case. The investors who do well run the numbers the same way on every deal, so they can compare opportunities objectively and walk away from the ones that only work in the best-case scenario.

That is also why we built tools around the analysis step. Most people can learn the formulas in ten minutes. The hard part is running them quickly and consistently across dozens of deals until the right one appears.

— Justin

Run the numbers on a real deal

If you want to see cap rate and cash-on-cash side by side without building a spreadsheet from scratch, start with MFScout.ai, our all-in-one AI platform for multifamily. You can also try the Multifamily Schooled deal analyzer on a property you are already looking at.

For structured learning, Multifamily University is $97 per month and RealEstateRadar.ai is $149 per month, both on our store page. If you want hands-on guidance from locating a property to closing, our mentorship program is built around getting your first deal within 90 days, guaranteed. You can apply for mentorship here.

A quick checklist before you make an offer

1. Rebuild the seller’s NOI with your own vacancy, expense and tax assumptions.
2. Calculate the cap rate at the asking price and compare it with recent comparable sales.
3. Get a real loan quote, then calculate debt service and cash-on-cash.
4. Stress test with higher vacancy and a higher rate.
5. Model IRR for your planned hold, including the exit cap rate.
6. Review the tax picture with your CPA.

FAQ

Is cap rate or cash-on-cash more important?

Neither wins on its own. Cap rate matters most when you are valuing and comparing properties, because it strips out financing. Cash-on-cash matters most when you are deciding whether a particular deal, with your particular loan, fits your goals.

Can cash-on-cash be higher than the cap rate?

Yes, when you have positive leverage: the property’s yield is above your cost of debt. Borrowing then boosts the return on the cash you invest. The same effect works in reverse when debt costs more than the property yields.

Is a 7% cash-on-cash return good?

It depends on your alternatives, the risk of the deal and how the return is expected to grow. A 7% figure on a stabilized, conservatively financed building can be sound. The same 7% on a highly levered deal with thin reserves may carry too much risk. Stress test it before you decide.

What is the difference between cap rate and IRR?

Cap rate is a one-year, unlevered snapshot based on NOI and price. IRR measures the return over your whole hold, including annual cash flow, sale proceeds and timing. Use cap rate to judge price, and IRR to judge the full business plan.

Sources

• Stern School of Business (NYU): Capitalization rate and income valuation
• MIT OpenCourseWare: Real Estate Finance and Investment, lecture on leverage
• Newmark: 3Q25 U.S. Multifamily Capital Markets Conditions & Trends
• Multifamily Dive: Fed cuts rates for the second time in 2 months
• Harvard GSD Executive Education: Real Estate Finance Fundamentals
• IRS Publication 925: Passive Activity and At-Risk Rules

Recommended

• Multifamily Financing Options for U.S. Investors: 2–4 vs. 5+ Units
• Deal analyzer Multifamily Schooled
• Deal analyzer Multifamily Schooled