New investors often confuse DSCR and cap rate because both involve dividing two numbers from a rental property's income statement. But they answer completely different questions, are used by completely different people, and a property can score well on one and badly on the other.
Cap rate is a return metric for investors. DSCR is a safety metric for lenders. Here is how each works and why you need to calculate both before you make an offer.
Cap rate: the property's return
Net operating income divided by purchase price (or current market value), expressed as a percentage. NOI is rent minus operating expenses, before debt service.
Cap rate tells you the unleveraged yield the property produces. It ignores how you finance the deal, which makes it a clean apples-to-apples comparison across properties. Read the full cap rate calculation guide for the breakdown.
DSCR: the lender's safety check
Net operating income divided by your total annual mortgage payments (principal plus interest). The result is a ratio, not a percentage.
A DSCR of 1.00 means the property's NOI exactly covers the mortgage. A DSCR of 1.25 means NOI is 125% of the mortgage payment — a 25% cushion in case rents drop or expenses spike. A DSCR below 1.00 means the property loses money every month and you have to feed it.
Who uses which
Cap rate users
Buyers, sellers, brokers, appraisers. Anyone valuing a property or comparing across deals. Cap rate is the universal language of commercial real estate pricing.
DSCR users
Lenders. Especially DSCR loan lenders, who underwrite the property's cash flow rather than your personal income. Banks check DSCR on every commercial and investment property loan they fund. See our DSCR loan deep-dive for how those work.
Why a property can have a great cap rate but fail DSCR
This trips up first-time investors. Cap rate ignores debt; DSCR is entirely about debt. So a property with a strong cap rate can still fail DSCR if the loan is sized aggressively or interest rates are high.
$400,000 fourplex, $32,000 NOI. Cap rate = 8.0% — strong.
Scenario A: 25% down, 30-year DSCR loan at 7.5%. Loan = $300,000. Annual debt service = $25,200. DSCR = 32,000 / 25,200 = 1.27 — passes the typical 1.25 minimum.
Scenario B: 20% down at 8.5% rate. Loan = $320,000. Annual debt service = $29,520. DSCR = 32,000 / 29,520 = 1.08 — fails most lender minimums (1.20-1.25), even though the property has the same 8% cap rate.
Same property. Cap rate unchanged. But under one financing structure the deal funds and under another it does not. That is the whole point: cap rate is a property fact, DSCR is a deal-structure fact.
Minimum DSCR thresholds by lender type
DSCR loans (non-QM)
Most DSCR loan programs require 1.00 to 1.25. Some specialty lenders will go down to 0.75 with a higher down payment or rate add-on. Best pricing usually starts at 1.20+.
Conventional investment loans (Fannie/Freddie)
Underwritten on borrower DTI rather than DSCR, but lenders still calculate it informally. Conventional vs DSCR comparison.
Commercial bank loans (5+ units)
Typically 1.20 to 1.30. Larger deals and stronger borrowers may get away with 1.15. Anything below 1.20 usually requires recourse, additional collateral, or a higher down payment.
Bridge / hard money
Some short-term lenders do not enforce DSCR at all because they expect the deal to be refinanced or sold within 12-24 months.
How to calculate DSCR before you apply
Lenders are going to run DSCR on you. Run it on yourself first to avoid wasted application fees and surprises in underwriting.
Step 1: Calculate NOI conservatively
Use market rent (not pro-forma rent), 5% vacancy, 8-10% management even if you self-manage, and realistic taxes/insurance for the property's actual ZIP code. Lenders almost always reduce optimistic owner numbers.
Step 2: Get a real loan quote
Plug your purchase price, down payment, and rate into a mortgage calculator. The Mortgage Math Lab will give you principal-and-interest plus full payment with taxes and insurance.
Step 3: Divide
NOI divided by annual P&I. If you get above 1.25, you are clean. Between 1.10 and 1.25 you may need to shop lenders. Below 1.10 you almost certainly need to put more down or walk.
How investors use both metrics together
Smart investors run cap rate first, DSCR second.
Cap rate tells you whether the property is priced reasonably for the market. If a property is offered at a 4% cap in a 6% cap market, you are overpaying — full stop.
DSCR tells you whether your specific financing structure will work. You can have a market-priced 6% cap deal that still fails DSCR if rates are too high or you are too leveraged.
Properties that pass both tests — fair cap rate and 1.25+ DSCR — are the deals worth pursuing. Anything that requires you to fudge either number is a deal that will hurt you in 18 months.
Bottom line
Cap rate is the property. DSCR is the loan. Run both on every deal, in that order. If the cap rate is good but DSCR fails, restructure the financing. If the cap rate is bad, no amount of clever financing will save you.
For your own income side of the ledger (like W-2 income that affects DTI on conventional loans), check TakeHomeTax. For property-side analysis, our cap rate calculator handles the rest.
When each metric drives the deal: worked example
Consider a $250,000 rental property generating $24,000 annual rent. Operating expenses (taxes, insurance, maintenance, management) total $8,000/yr. NOI = $16,000.
- Cap rate: $16,000 / $250,000 = 6.4%. That's the investor's view — what the property would yield in all-cash terms.
- DSCR at 25% down conventional ($187,500 loan at 7% = ~$15,000/yr P&I): $16,000 / $15,000 = 1.07. That's the lender's view — does the property's income cover the debt payment?
From the investor side, 6.4% is a workable cap rate. From the lender side, 1.07 DSCR is below the typical 1.25 minimum DSCR lenders require. The deal doesn't qualify for a DSCR loan as proposed.
Two ways to make the DSCR work
Option 1: larger down payment. Put 35% down ($87,500), loan only $162,500. Annual P&I drops to ~$13,000. DSCR becomes $16,000 / $13,000 = 1.23. Closer but still under 1.25. Need ~40% down to clear comfortably.
Option 2: lower-rate loan. If you can secure a 5.5% rate (community bank, portfolio lender, or seller financing), the loan's annual P&I drops to ~$12,800. DSCR becomes 1.25 — right at the threshold.
What the metrics tell each party
Cap rate tells the investor whether the asset itself is productive. DSCR tells the lender whether the asset can service its debt. Both can move independently: a low-cap-rate property in California can have great DSCR if the buyer puts 50% down; a high-cap-rate property in the Midwest can have weak DSCR at typical 25% down because the smaller property still needs the same loan-relative debt service.
The practical implication: an investor who only watches cap rate finds deals that don't finance. An investor who only watches DSCR forgets that the lender's minimum is not the same as the deal being a good investment. Both metrics matter.