You found a rental where the tenant pays the property taxes and the insurance directly. The rent looks low on paper, but your out of pocket carrying cost is almost nothing, so the deal pencils better than anything else you have looked at this month. Then the loan comes back at a coverage ratio that fails, and nobody can explain why, because on a cash basis the property is clearly fine.
This is one of the few places in rental lending where the economics of a deal and the arithmetic of the loan file point in opposite directions. The property is not the problem. The lease structure is, and specifically the fact that a residential rental loan is built on an assumption that the landlord pays the carrying costs. When the tenant pays them instead, the ratio does not improve. It collapses.
Here is how the structure works, where the ratio breaks, what a lender will and will not adjust for, and how to price a net lease before you are under contract instead of after.
What a net lease actually is on a rental file
A gross lease is the shape almost every residential lender expects. The tenant pays one number every month. Out of that number the landlord pays the taxes, the insurance, and usually the exterior maintenance. A net lease shifts some or all of those obligations to the tenant, who pays a lower base rent and then pays the county and the carrier directly.
You will hear the term in three strengths. In a single net lease the tenant picks up the property taxes. In a double net lease the tenant picks up taxes and insurance. In a triple net lease the tenant picks up taxes, insurance, and maintenance, which in practice means the landlord is collecting a near passive check and doing almost nothing. Commercial investors trade in these structures constantly. Residential investors run into them occasionally, usually with a long term tenant, a business tenant, or a family arrangement that drifted into a net structure without anybody calling it that.
The important thing is that none of those labels mean anything to the underwriting engine. A rental loan reads two numbers off your file: the rent the lease obligates the tenant to pay, and the full housing payment the property carries. It does not credit you for who writes the check to the tax office. That single asymmetry is the whole problem, and it is worth working through with real figures.
The ratio problem in one worked example
Take a house that would rent for 2,400 dollars a month on an ordinary gross lease. Annual taxes are 4,800 dollars, so 400 dollars a month. Landlord insurance is 1,800 dollars a year, so 150 dollars a month. You are borrowing 240,000 dollars on a thirty year fixed at 7.25 percent, which is about 1,637 dollars a month of principal and interest.
On the gross lease the housing payment the lender uses is 1,637 plus 400 plus 150, or 2,187 dollars. Coverage is 2,400 divided by 2,187, which is 1.10. That clears a 1.10 minimum with nothing to spare, but it clears.
Now put the identical house on a double net lease. The tenant agrees to pay the taxes and the insurance directly and the base rent drops to 2,000 dollars, because the tenant is now absorbing 550 dollars a month of carrying cost. Your economics are unchanged. You net the same money. But the lender reads rent of 2,000 dollars and still assembles a housing payment of 2,187 dollars, because the taxes and insurance are still obligations of the property. Coverage is 2,000 divided by 2,187, or 0.91.
The same house, the same tenant, the same cash in your pocket, and the ratio moved from a pass to a decline. If you want to run your own version of this before you write an offer, the DSCR deal calculator will show you the gap in about a minute, and the full walkthrough of how coverage is calculated explains why the denominator is built the way it is.
Why the lender will not simply back out the taxes and insurance
The obvious fix is to ask the lender to exclude the taxes and insurance from the payment, since the tenant is paying them. Almost no residential rental program will do it, and the reasoning is not arbitrary.
The taxes are a lien on the property, not a debt of the tenant. If the tenant stops paying, the county does not pursue the tenant. It attaches the property, and the lender’s position sits behind that lien. The same logic runs through unpaid water and sewer balances, which follow the real estate regardless of who ran up the bill. A lender underwriting a thirty year loan has to assume the obligation lands on the owner eventually, because legally it does.
Insurance is worse. If the tenant lets the policy lapse, the collateral is uninsured and the lender finds out after a loss. That is why coverage requirements on a rental are written as obligations of the borrower and verified before closing, not delegated to whoever happens to occupy the building.
So the payment the lender builds is the payment the property actually carries, assembled from the tax bill and a real insurance quote. Who is contractually supposed to reimburse it is a matter between you and your tenant. It changes your cash flow. It does not change the loan.
What the lease has to say before anyone can read it
Before any of this gets evaluated, somebody has to read the lease, and net lease language on residential paper is frequently a mess. A sentence saying the tenant is responsible for utilities and taxes is not the same as a schedule that names the parcel, states the tax year, and says what happens if the bill is not paid by the due date.
Underwriting will want to see the base rent stated as a number, the term, and the obligations split out clearly. If the lease is silent on insurance and you are telling the lender the tenant carries it, the file has a contradiction in it, and contradictions get resolved against the borrower. The general rules about whether you need a signed lease at closing apply here with extra force, because the lease is doing more work than usual.
Watch for the side agreement problem too. Plenty of net arrangements live in a text message or a handshake while the written lease says something else entirely. The written lease is the document that gets underwritten. If the real deal is not in it, you either amend it before you apply or you accept that the file will be read on the lower base rent with no credit for the structure.
If your tenant is a relative, the bar goes up again. The way a lender handles a related party lease is skeptical by design, and a net structure inside a family arrangement attracts exactly the kind of attention you do not want.
The insurance side is the harder half
Taxes are at least verifiable. A lender can pull the parcel, read the bill, and put a real number in the payment. Insurance on a net lease is murkier, and it is usually where these files stall.
If the tenant is carrying the policy, the lender needs to be a named mortgagee on a policy the lender did not arrange, written for a party who is not the borrower. That is an awkward document to produce. A tenant’s policy is often a renter’s policy or a business policy, neither of which insures the building to replacement cost. The lender is not going to accept contents coverage as hazard insurance on its collateral.
In practice the workable version looks like this: you carry the landlord policy in your own name, the lender is the mortgagee, and the lease obligates the tenant to reimburse you for the premium. You keep control of the coverage. The tenant bears the cost. The file has a clean policy with the right named insured, and nobody is relying on a tenant to keep the collateral insured.
That version also solves the escrow question cleanly, which is the next thing underwriting will ask about.
Grossing the rent back up, and when a lender will allow it
There is a legitimate way to present a net lease, and it is not to argue about the denominator. It is to fix the numerator.
If the tenant reimburses you for taxes and insurance, those reimbursements are rent. Not in casual conversation, in the lease. A lease that states a base rent of 2,000 dollars plus a monthly additional rent of 550 dollars for tax and insurance reimbursement is a lease with 2,550 dollars of contract rent in it. Now the arithmetic works the ordinary way: 2,550 divided by 2,187 is 1.17, and the deal is stronger than the gross lease version ever was.
Whether a given program will count the additional rent varies, and it varies by how the lease is drafted rather than by how you describe it. Reimbursement stated as rent, payable monthly to the landlord, is the version most likely to count. An annual true up where the tenant writes a check to the county in November is the version least likely to count, because there is no monthly rent stream to verify and nothing lands in your account.
This is the same mechanism that makes a lender cautious about ancillary income like laundry and parking. Money that reliably arrives as rent under a contract tends to count. Money that arrives some other way tends not to. If you want the structure credited, route it through the rent.
The escrow question, and why a waiver does not fix the ratio
Borrowers who learn that taxes and insurance are inflating the payment often ask about waiving the escrow. It is a reasonable instinct and it does not help.
An escrow waiver changes who holds the money and when it moves. It does not change the coverage calculation. The lender still builds the payment from principal, interest, taxes, insurance, and any association dues, because that is what the property costs to carry whether or not the lender is collecting monthly. The rules around when you can waive tax and insurance impounds are about cash management, not about qualifying.
On a net lease there is a practical reason to keep the escrow anyway. If the tenant is supposed to pay the taxes and quietly stops, an escrowed loan catches it immediately, because the servicer pays the bill and bills you. An unescrowed loan catches it when the county sends a delinquency notice, which can be a year later and several hundred dollars worse. The mechanics of escrow and impounds on a rental loan are worth understanding before you decide.
Keeping the escrow and taking reimbursement as additional rent is the structure that survives both underwriting and the next five years of ownership.
The mirror image, and the other ways rent gets misread
Net leases are one end of a spectrum. The other end is the building where the landlord pays everything, including the heat, and the same asymmetry runs the other direction. When you are the one absorbing costs a lender does not see in the payment, your real return is worse than the ratio suggests. That is the problem laid out in master metered utilities and landlord paid heat.
It is worth knowing the adjacent traps, because they stack. A lender reading a lease with a concession in it will use the effective rent, not the headline, which is the issue in two months free and how concessions get read. A lender looking at a long term tenant paying under market will often use the lower of actual and market rent, which is the trap in buying a rental with a below market tenant. And a tenant paying in currency leaves you with no verifiable stream at all, as in proving rental income a lender cannot find in a bank statement.
In every one of these the pattern is identical. The lender uses the contract rent it can verify against the full cost the property carries. Anything happening outside those two numbers is invisible, however real it is to you.
How to price a net lease before you are under contract
Run the deal twice. Once on the base rent with the full housing payment, which is what the lender will do. Once on your actual economics, which is what your return depends on. If the first number fails and the second one is fine, you do not have a bad property. You have a drafting problem, and drafting problems are fixable before closing and expensive afterward.
Three moves handle most of it. Get the reimbursement written into the lease as monthly additional rent rather than as a tenant obligation to a third party. Keep the landlord policy in your own name with the lender as mortgagee and let the tenant reimburse the premium. And pull the actual tax bill rather than the seller’s number, because a new assessment after your purchase can move the payment again, which is the issue in property tax reassessment after purchase.
It also helps to build the property’s real income statement rather than arguing from the rent line alone. The approach in building an NOI a lender will actually use will tell you quickly whether a net structure is genuinely improving your return or just moving numbers between columns.
If you are looking at a net lease now and want the ratio run both ways before you commit, send us the lease and the tax bill and we will tell you which version of the deal a lender is going to see. Call 412-990-2941 if it is time sensitive.
FMC Capital is a Pittsburgh-based mortgage brokerage, NMLS #1840537. We place loans on rentals and flips across Pennsylvania and additional states. Loan terms, coverage minimums, and program guidelines vary by lender and are subject to change. Nothing here is a commitment to lend, and nothing here is legal, tax, or insurance advice. Lease structures carry consequences well beyond financing, so have a qualified attorney review any net lease before you sign it.