NOI and cap rate set what a property is worth — and how much debt it supports. Learn how the two connect, and why they drive your loan, not just your valuation.
Net operating income and cap rate are the two numbers sitting underneath almost every commercial real estate decision. Together they set what a property is worth — and, just as importantly, how much debt it can support. Most owners think of NOI and cap rate as valuation tools; lenders use the same two numbers to size your loan.
Net operating income (NOI)
NOI is the income a property generates after operating expenses, but before debt service and capital items.
Effective gross income is your potential rent plus other income, less vacancy and credit loss. Operating expenses include taxes, insurance, management, maintenance, and utilities — but not your mortgage payment, capital improvements, or depreciation. Run it in the NOI Calculator.
NOI is the foundation of everything downstream. Both income-based loan tests — DSCR and debt yield — start from it, so a change in NOI moves your value, your DSCR, and your debt yield all at once.
Cap rate
The capitalization rate links income to value. It’s the property’s unleveraged yield — the return a buyer would earn paying all cash.
A property with $560,000 of NOI at a 7.5% cap rate is worth about $7.47 million ($560,000 ÷ 0.075). Lower cap rates mean higher values for the same income; higher cap rates mean lower values. The market sets cap rates — by property type, location, quality, and where interest rates sit. Use the Cap Rate Calculator to solve either direction.
How the two flow into your loan
Here’s the part owners often miss: NOI and cap rate don’t just value the asset — they drive every one of the three loan-sizing tests.
- NOI → DSCR. DSCR is NOI divided by debt service. Higher NOI supports a larger DSCR-based loan.
- NOI → debt yield. Debt yield is NOI divided by the loan. Higher NOI raises the debt-yield ceiling.
- NOI + cap rate → value → LTV. Cap rate turns NOI into value, and value sets the LTV-based loan.
So a single number — NOI — feeds all three tests, and cap rate converts it into the value the LTV test uses. That’s why improving NOI is the most powerful lever a borrower has: it lifts value and loan capacity together. See how lenders size CRE loans and how property value drives loan proceeds.
Why cap rate movement matters for your debt
Because cap rate sets value, a change in market cap rates changes your value — and therefore your LTV-based loan — even if your income hasn’t moved. When cap rates rise (values fall), the same NOI supports a smaller LTV loan, which can open a refinance gap at maturity. When cap rates compress (values rise), LTV capacity grows. Watching cap rate trends in your market is watching your future financing capacity.
How Mercury helps
We translate your NOI and the right market cap rate into a clear picture of both value and supportable debt — and identify which constraint limits your loan — then run a competitive lender process where we’re licensed or exempt. Start with the NOI and Cap Rate calculators, then discuss your financing scenario.
Frequently asked questions
What’s the difference between NOI and cash flow?
NOI is income after operating expenses but before debt service and capital costs. Cash flow is what’s left after the mortgage and capital items. Lenders size on NOI, not cash flow after debt.
How does cap rate affect how much I can borrow?
Cap rate converts NOI into value, and value sets the LTV-based loan. A lower cap rate means a higher value and more LTV capacity; a higher cap rate means less. Income tests (DSCR, debt yield) still apply.
Does a lower cap rate always mean a bigger loan?
Not necessarily. A lower cap rate raises the LTV-supported amount, but if DSCR or debt yield is your binding constraint, the loan is capped by income regardless of value.