Real Estate Tax Calc
How DSCR is calculated
DSCR = Net Operating Income ÷ Annual Debt Service. NOI is gross rents minus operating expenses (taxes, insurance, management, maintenance, vacancy) before mortgage payments. Annual debt service is your total principal + interest payments for the year.
Example: a rental property generates $30,000 in NOI and your annual mortgage payments are $24,000. DSCR = $30,000 ÷ $24,000 = 1.25. A DSCR above 1.0 means the property generates more income than it costs to service the debt. Below 1.0 means the rent doesn't cover the mortgage — negative cash flow territory.
Why lenders care, and what they require
Most conventional lenders require a DSCR of at least 1.20 to 1.25 on investment properties before they'll extend a loan. Some lenders will go to 1.15; fewer will lend below 1.0 (interest-only loans sometimes permit this in strong appreciation markets).
DSCR loans — sometimes called investor cash-flow loans — underwrite on the property's DSCR rather than the borrower's personal income. They've become popular with investors who have multiple properties or irregular W-2 income. The trade-off is typically a higher interest rate than an agency loan.
Improving your DSCR
You can improve DSCR by increasing rents, reducing operating expenses, or reducing the loan amount (larger down payment). Refinancing to a lower rate improves it on the debt-service side.
Watch for expense underestimation: lenders often use market-rate vacancy and management assumptions rather than actual numbers, which can push your DSCR below their threshold even when your property's actual cash flow looks fine.
NOI is not your tax-return net income
A crucial distinction: the net operating income a lender plugs into DSCR is not the taxable net income on your Schedule E. NOI is measured before mortgage principal, interest, depreciation, and income taxes. Depreciation — often your largest paper deduction — is ignored entirely, because it is a non-cash expense that does nothing to a property's ability to make its payment.
This is why an investor can show a tax loss on paper, thanks to depreciation, while still carrying a healthy DSCR above 1.25. Lenders underwrite the cash actually available to service debt, not the depreciation-driven number the IRS sees. If your goal is financing, focus on operating cash flow; if your goal is a lower tax bill, focus on depreciation — the two figures answer different questions and rarely match.
What goes in the debt-service figure: PITIA
Many DSCR programs do not stop at principal and interest. They use PITIA — principal, interest, taxes, insurance, and association (HOA) dues — as the denominator. If a property carries $18,000 of annual principal and interest, $4,000 of property tax, $1,500 of insurance, and $600 of HOA, the debt-service figure is $24,100, not $18,000.
Quoting P&I alone overstates your DSCR and sets up a surprise when the underwriter recalculates on PITIA. Always confirm which definition a specific lender uses before you assume you clear their threshold, because the same property can pass a P&I test and fail a PITIA test.
A fuller worked example, the lender's way
Consider a duplex you are buying for $350,000 with $42,000 of gross scheduled rent. A lender applies a 5% vacancy factor ($2,100), an 8% management fee ($3,360), and estimates $4,200 for repairs, $4,800 for property tax, and $1,600 for insurance — roughly $16,060 of operating expenses. That leaves an NOI near $25,940.
If your proposed loan is $280,000 at 7.5% over 30 years, principal and interest run about $23,480 a year, and folding in taxes and insurance the PITIA figure is about $29,880. Property-level DSCR on P&I is $25,940 ÷ $23,480 = 1.10; on full PITIA it is $25,940 ÷ $29,880 = 0.87. Under a PITIA-based program this deal fails, and you would need a larger down payment or a lower price to clear 1.25. Running the numbers the lender's way — not your optimistic way — before you make an offer is what keeps a financing contingency from blowing up the deal.
DSCR loan terms: rate, LTV, reserves, and prepay penalties
Because DSCR loans skip personal income verification, they price in the extra risk. Expect an interest rate roughly 0.5 to 2 percentage points above a comparable fully documented investment loan, maximum loan-to-value commonly capped near 75-80%, and a requirement to hold reserves — often six months of PITIA — in a liquid account.
Many DSCR loans also carry a prepayment penalty, frequently a step-down structure such as 5/4/3/2/1 over the first five years, because the lender is counting on the interest income. These features rarely appear on agency loans, so read the term sheet closely: a low advertised rate can hide a stiff prepay penalty that limits your ability to refinance or sell early. DSCR loans are also commonly written to an LLC, which suits investors who hold title in an entity for liability reasons.
Property-level vs. global DSCR
Lenders distinguish between property-level DSCR — a single property's NOI over its own debt service — and global DSCR, which aggregates the cash flow and debt of your whole portfolio, and sometimes your personal income. Portfolio and commercial lenders often underwrite to a global figure so one strong property can carry a weaker one, or so a large salary supports a thin-margin acquisition.
Know which test a lender is using: a property that fails on its own can still qualify under a global test, and a portfolio with one bleaking property can drag down an otherwise strong global number. When you approach a commercial or portfolio lender, ask up front whether they measure each property or the whole book.
How DSCR relates to cap rate and cash-on-cash return
DSCR, cap rate, and cash-on-cash return all begin with NOI but answer different questions. Cap rate (NOI ÷ price) measures unleveraged yield and ignores financing. DSCR (NOI ÷ debt service) measures the cushion between income and the loan payment. Cash-on-cash return (annual pre-tax cash flow ÷ cash invested) measures the return on your actual out-of-pocket equity after debt service.
A property can show an attractive cap rate but a poor DSCR if it is heavily leveraged at a high rate — exactly the situation lenders guard against. Modeling all three before you buy tells you whether a deal is both financeable and worth financing, rather than one or the other.
Common DSCR mistakes and how to raise a marginal ratio
Three errors trip up investors. First, using gross rent instead of NOI — forgetting vacancy, management, and maintenance inflates the ratio and disappoints the underwriter. Second, using the wrong debt-service definition — quoting P&I when the lender wants PITIA. Third, ignoring the lender's own assumptions — underwriters frequently substitute a market vacancy factor (often 5%) and a market management fee (8-10%) even if you self-manage, which can pull a break-even property below the threshold.
If your projected DSCR sits just under the line, several levers close the gap. Increasing the down payment shrinks the loan and payment directly — the fastest fix. Buying down the rate with points lowers the interest component. Documenting higher achievable rents with a rent survey or signed leases raises NOI. Providing an actual insurance quote below the lender's placeholder trims the denominator. And negotiating a lower purchase price improves every ratio at once. Because DSCR is a simple quotient, small moves on either the numerator or denominator can flip a 1.18 into a 1.25.
Interest-only and adjustable-rate wrinkles
The debt-service figure depends on how the loan amortizes. An interest-only period lowers the payment and flatters the DSCR early, but the ratio worsens when principal payments begin — so some lenders underwrite to the fully-amortizing payment to avoid this trap.
An adjustable-rate loan raises the same concern: a lender may qualify you at a stressed rate (the note rate plus a margin, or a fully-indexed rate) rather than a low teaser, so the DSCR they compute can be lower than your first payment suggests. When you compare loan offers, calculate DSCR on the payment that will actually apply after any introductory period, not just the opening payment.
Frequently asked questions
What DSCR do lenders require for a rental?
Most conventional investment-property lenders require 1.20–1.25. DSCR loan programs often require 1.0–1.25 depending on the loan-to-value and reserve requirements.
What is a DSCR loan?
A DSCR loan qualifies you based on the property's rental income relative to its debt service, rather than your personal W-2 or tax-return income. It's popular with investors who have multiple rentals or report low taxable income due to depreciation.
How do I calculate DSCR before buying?
Estimate NOI (expected rent × occupancy rate, minus all operating costs). Divide by the annual payment on the proposed mortgage. If the result is below 1.20, either negotiate a lower price, put more down, or reconsider.
Does depreciation lower my DSCR?
No. DSCR is based on net operating income, which is calculated before depreciation and mortgage payments. Depreciation is a non-cash paper deduction for taxes and has no effect on the cash available to service debt, so a property can show a tax loss and still have a strong DSCR.
What is PITIA in a DSCR calculation?
PITIA is principal, interest, taxes, insurance, and association (HOA) dues. Many DSCR lenders use the full PITIA payment as the denominator rather than principal and interest alone, which lowers the calculated ratio compared with a P&I-only figure.
What DSCR do I need to refinance?
Refinance programs typically want the same 1.20-1.25 as a purchase, measured against the new loan payment. If rates have risen since you bought, the higher payment can push your DSCR below the threshold even when rents have grown, so check the ratio before you apply.
Can I get a DSCR loan below 1.0?
Some programs allow a sub-1.0 or "no-ratio" DSCR loan, but they require a larger down payment (often 25-30%), charge a higher rate, and demand more reserves to offset the negative cash flow the low ratio implies.
Sources
Educational information and estimates only. Not tax advice. Tax rules change and vary by situation; consult a qualified tax professional before acting.