The Quick Read: On a $300,000 duplex, the loan is the smaller of two ceilings: the leverage cap on the price, or the amount the rent can carry after taxes and insurance. Neither ceiling alone gives you the answer. Philadelphia‘s tax load makes the rent ceiling the one most likely to bind.
- Leverage ceiling: on a purchase, most programs land at 75%-80% LTV, so you put down roughly 20%-25%, subject to lender guidelines.
- Coverage ceiling: the combined rent of both units has to cover the full monthly payment (principal, interest, taxes, insurance, and any association dues).
- Credit: a 620 floor exists in parts of the network, most programs want around 660, and 700+ opens the strongest leverage tiers.
- Reserves: commonly about 6 months of the full payment, and they vary by lender and loan size.
- Short on rent? A bigger down payment can lift coverage, but it never erases the other rules.
A “$300K duplex loan” is a range, not a single number. This article shows what sets it and where the limits sit.
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Rate source: Freddie Mac 30-yr average via FRED® — Federal Reserve Bank of St. Louis · effective Oct 29, 2026
Prefilled with starting assumptions — enter your own rent or nightly figures, taxes, insurance, and HOA for a more accurate picture.
Program parameters update from Lendmire’s centralized guideline source. Taxes and insurance are editable estimates.
As of Oct 29, 2026 · General Freddie Mac market benchmark, not a Lendmire loan offer. Rent, nightly rate, occupancy, taxes, and insurance are editable estimates. Short-term rental figures are estimates only and vary significantly by season, property type, management approach, and local short-term-rental rules — confirm local regulations before relying on them. Qualifying income for short-term rentals varies by program — some use appraisal market rent, others use documented STR history or projections — and is confirmed in underwriting. Not a Loan Estimate, approval, or commitment to lend. Program availability and eligibility are subject to lender guidelines, credit approval, property review, and underwriting.
How Does a DSCR Loan Decide the Amount on a Duplex?
The lender runs two tests and uses the tighter result. First, leverage: the loan can’t exceed a set percentage of the lower of price or appraised value. Second, coverage: the rent has to cover the monthly payment by a margin the program accepts. Whichever test gives the smaller loan wins.
Start with the vocabulary. DSCR stands for debt service coverage ratio. It is monthly rent divided by the monthly payment, which lenders call PITIA: principal, interest, taxes, insurance, and association dues. A ratio of 1.00 means rent equals the payment. Above 1.00, rent covers it with room to spare.
This is the residential version. It uses gross rent over PITIA. It does not subtract operating costs the way commercial loans do. That is why the number is simple, and also why it can mislead. Clearing 1.00 does not mean positive cash flow. Repairs, vacancy, management, utilities, and capital expenses all sit outside the calculation.
Across the wholesale network, 1.00 is where select programs start. It is a floor for specific programs, not a universal standard. Stronger ratios open better pricing and leverage. A separate select-lender path takes coverage below 1.00 with leverage and terms adjusted. Those are different paths, not one program with a moving floor.
For the full framework, see Lendmire’s complete DSCR loans guide.
Key Terms Defined
LTV (loan-to-value): the loan amount divided by the property’s value, measured against the lower of price or appraised value.
PITIA: principal, interest, taxes, insurance, and association dues, the full monthly cost the rent has to cover.
DSCR: monthly rent used for lender review divided by PITIA.
Reserves: liquid cash left after closing, counted in months of PITIA.
Seasoning: how long you must have owned a property before a cash-out refinance is allowed.
Business-purpose loan: a loan for a non-owner-occupied rental, not a place you live.
The Leverage Ceiling on a $300K Price
On a purchase, most files land at 75%-80% LTV. That means 20%-25% down. Select high-leverage programs reach 85% LTV, or 15% down, with roughly a 700+ score. These figures depend on credit, the property, and the lender.
Say the appraisal comes in at $285,000 on a $300,000 contract. The lender sizes off the lower number. The gap lands on your side as extra cash to close. That surprises many first-time buyers.
On a cash-out refinance of a standard rental, leverage tops out around 75% LTV across most of the network. About 6 months of seasoning is the common expectation. Same $300,000 value, different answer than a purchase. The illustrative calculator on the site converts percentages into dollars for your own inputs. Leverage, reserves, and pricing vary by lender and program; the final terms follow the full file review.
Also know the size limits. Standard programs run up to $3,000,000, so a $300,000 duplex sits well inside the range. Smaller balances route through select lenders in the network. Above $2,500,000 the network generally holds to 30-year fixed structures. Neither limit touches this deal.
The Coverage Ceiling: Where Philadelphia Gets Tight
Here is where the city matters. Property taxes sit inside PITIA, so a heavy tax bill shrinks what the rent can support.
The City of Philadelphia publishes a combined real estate tax rate, made up of the City portion and the School District portion, applied to the value set by the Office of Property Assessment. The city has said that rate has not changed since 2016 and will stay the same going into the next valuation cycle, per the City’s valuation notice.
Two practical points follow. First, taxes follow the assessed value, not your purchase price. If the assessment sits well above or below $300,000, the tax line moves with it. Ask for the current assessment before you write an offer. Second, a reassessment can change the tax line after you buy, which changes your coverage ratio. A deal that clears the test today should survive a modest tax bump.
The same logic applies in any high-tax area. When taxes take a larger share of the payment, the rent has to be larger, or the loan smaller, to reach the same ratio.
Tax treatment can depend on how the funds are used and how the property is held; investors should keep clear records and speak with a qualified tax professional before relying on any deduction.
How Two Units of Rent Get Counted
A duplex has two rents against one payment. The units are generally credited at the lower of the lease or the market rent, then added together. Underwriting usually takes the lower figure, so a lease above market doesn’t help you.
For a two-to-four-unit property, the appraisal includes a per-unit rent schedule on the small residential income property form, known as Form 1025. The single-family rent form, Form 1007, doesn’t apply to a duplex. These are appraisal forms only. The loan guidelines come from the lender, not the form.
Some edge cases change the count:
- Below-market lease: a family or inherited tenant paying under market drags the ratio down. Waiting for lease expiry and re-leasing at market is the usual fix, or ask whether the program can use market rent.
- Vacant unit: the appraiser’s market rent is generally the income figure. Some lenders haircut vacant units, so treatment varies.
- Second unit that isn’t legal: a Philadelphia duplex needs a legal two-unit configuration. Confirm the unit count and rental licensing before you rely on rent from both units.
- Short-term rental use: the rent forms are monthly market-rent tools. A nightly rate multiplied by 30 is not support for market rent. Short-term rental rules can vary by city, county, HOA, and property type, so investors should confirm local rules before relying on projected rental income.
Online rent figures vary widely. RentCafe and Apartment List publish very different citywide two-bedroom numbers for Philadelphia, because one reports averages that lean toward newer apartment buildings and the other reports medians across all stock. Neither is a duplex figure. That gap is the reason the appraiser’s rent schedule, not a rent website, drives your loan.
Worked Example: Which Ceiling Binds?
Run the logic with ratios, not dollars. Picture a $300,000 purchase at 75% LTV. The leverage test says the loan can be up to 75% of the lower of price or value.
Now the coverage test. Suppose the combined appraiser rents clear about 1.25x against the full payment on that loan. The program’s floor is met with room to spare, so leverage is the binding limit. The loan is sized by the 75% cap.
Change one input. Say the combined rents only reach about 0.90x on that same loan. A program with a 1.00 floor would not fit. Sub-1.00 coverage is available through select lenders in the network, with leverage and terms adjusted. Or you can shrink the loan with more down payment, which lowers the payment and lifts the ratio. Now coverage, not leverage, sets the number.
Here is the comparison:
| Scenario | Leverage test | Coverage test | What sets the loan |
|---|---|---|---|
| Strong rents (~1.25x) | 75% LTV cap | Clears easily | Leverage cap |
| Thin rents (~0.90x) | 75% LTV cap | Falls short of 1.00 | Coverage (or adjusted path) |
| Thin rents, bigger down payment | Lower LTV | Ratio rises | Coverage, now met |
All ratios here are modeled assumptions, not market data. In a high-tax city like Philadelphia, the thin-rent row is a real possibility, not an exotic one.
(The break-even is simple to find: raise the down payment until the payment on the smaller loan is covered by the rent at your target ratio.)
DSCR vs. conventional financing
There are two common ways to finance an investment property, and they qualify you differently — here’s how investors weigh them.
Why investors choose it
- Qualifies on the property’s rental income — no personal tax returns, W-2s, or pay stubs needed to document income.
- No personal debt-to-income ceiling to clear, so existing mortgages and obligations don’t cap your borrowing the same way.
- Can be closed in an LLC, keeping the property inside a business entity.
- Built for scaling — not held to the limit on number of financed properties that conventional financing applies.
- Underwriting centers on the deal: generally qualifies when the rent covers the payment, a 1.00x coverage ratio being a common baseline (confirmed in underwriting).
- Designed specifically for investment property, including long-term and, where the program allows, short-term rentals.
Where it’s strong
- Often the lowest ongoing financing cost for a buyer who fully qualifies on personal income — a fit for a first property or a cost-first purchase.
Trade-offs for investors
- Requires full personal income documentation and must fit within a debt-to-income limit — salary, existing debts, and other mortgages all count.
- Typically held in your personal name rather than a business entity.
- Caps how many financed properties you can carry, which can become a ceiling as a portfolio grows.
- Evaluates you as a borrower as much as the property, which usually means more paperwork.
How investors usually choose: a first or single property often optimizes for the lowest financing cost; portfolio builders often optimize for leverage, vesting in an LLC, and scaling past conventional caps. The right answer depends on your goals, the property, and current guidelines — both paths run through select lenders in Lendmire’s wholesale network, with eligibility and terms confirmed in underwriting.
What If the Ratio Falls Short?
You have several levers. Each has a cost.
- Put more down. A larger down payment lowers the payment and can lift the ratio. It never erases leverage caps, credit floors, reserve rules, or property eligibility.
- Lower the price. A smaller price means a smaller loan for the rent to carry.
- Raise the documented rent. Re-lease below-market units to market, with the appraiser’s schedule supporting it.
- Restructure the loan. Extended terms (40-year) and interest-only periods are available through select lenders in the network, and ARM structures exist for investors who want them. Some interest-only programs test coverage on interest, taxes, insurance, and dues during the interest-only period, which raises what the rent can support. Confirm the structure against the specific program.
- Use a sub-1.00 path. Available through select lenders in the network, with leverage and terms adjusted.
Think of it this way: the strongest files clear both tests, enough equity and enough rental coverage. Fix one without the other and the file still stalls.
Credit, Reserves, and the Rest of the File
DSCR loans qualify primarily on property-level rental income covering the payment, subject to lender guidelines. That doesn’t mean the borrower disappears. Credit still gets pulled. Most programs want around 660, a 620 floor exists in parts of the network, and 700+ unlocks the strongest leverage tiers.
Reserves vary by lender, leverage, loan size, and transaction type. They commonly run about 6 months of PITIA. Conservative rate-and-term files at modest leverage under $1,500,000 can see reserves waived. Loans above that size typically step up to about 9 months. For a $300,000 duplex, plan around the 6-month figure unless the lender tells you otherwise.
DSCR loans are designed for non-owner-occupied investment properties. Because they are business-purpose investor loans, they are reviewed differently from a standard owner-occupied mortgage. If you plan to live in one unit, this is the wrong product at purchase. Lendmire’s piece How Much a DSCR Lender Lends on a Former House Hack Duplex covers what changes once you move out.
Vesting in an LLC is common for DSCR investors, subject to lender program eligibility. Not every program treats entities the same way, so ask early.
Property type matters too. Manufactured homes (single- and double-wide), log homes, and barndominiums are not offered in the network. A standard Philadelphia rowhouse-style duplex is not in that group.
Purchase Versus Refinance at the Same $300K Value
The same property sizes differently depending on the transaction.
| Transaction | Typical leverage ceiling | Notes |
|---|---|---|
| Purchase | 75%-80% LTV | High-leverage programs reach 85% with roughly 700+ |
| Rate-and-term refinance | Up to 85% LTV | Program and credit dependent |
| Cash-out refinance (standard rental) | About 75% LTV | About 6 months seasoning common |
If you already own the duplex and want equity out, read Lendmire’s guide to DSCR cash-out refinance.
DSCR Versus Other Options for This Deal
A DSCR loan fits a pure rental purchase where you won’t live in the building. If you plan to occupy one unit, an owner-occupied product usually fits better at the start. DSCR is not a hard-money loan, and it isn’t a bridge. It’s a longer-term investor mortgage underwritten to the property’s rent.
DSCR loans also scale. Each property is reviewed on its own rent, not on a stack of personal income. That is why investors use them to add doors and later recycle equity.
Frequently Asked Questions
Can I borrow the full 80% on a $300K Philadelphia duplex?
Sometimes. A purchase can reach 80% LTV on many files, but only if credit, reserves, property eligibility, and rental coverage all clear. High taxes can make coverage the tighter limit before leverage is. Subject to lender guidelines.
Does the lender use my actual lease or the appraiser’s rent?
Generally the lower of the two, per unit, then summed. A lease above market doesn’t raise the loan. A lease below market can shrink it, which is why re-leasing at market before you apply often helps.
Does clearing 1.00 mean the duplex makes money?
No. The ratio compares rent to PITIA only. Repairs, vacancy, management, utilities, and capital expenses are outside it. A duplex can clear 1.00 and still run thin once those costs show up.
What credit score do I need?
It depends on the program. A 620 floor exists in parts of the network, most programs want around 660, and 700+ unlocks the strongest leverage tiers. Higher scores generally support higher leverage.
What if my rent can’t reach 1.00?
Several paths exist. You can add down payment, re-lease at market, or look at a sub-1.00 program.
Next Steps
If you are buying or refinancing a rental property and want to see how the numbers work, Lendmire can help you compare DSCR loan options based on the property income, credit profile, leverage, and investor goals. Reach the team at 828-256-2183 or request a quote. Programs change and every file is underwritten individually. This is not a commitment to lend.
Philadelphia’s tax rate has held steady for years, so the duplex that clears coverage today is likely to keep clearing it, provided the assessment doesn’t jump.
About Lendmire
Lendmire is a non-QM mortgage brokerage (NMLS# 2371349) arranging DSCR investor loans in 41 markets, including Washington, D.C., through wholesale and investor-lending channels. DSCR loans are evaluated by the lender on rental income rather than personal income, subject to lender guidelines — a fit for LLC-owned portfolios, self-employed investors, and operators scaling beyond conventional loan caps. Recognized as a Scotsman Guide Top Mortgage Workplace in 2025 and 2026.
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Informational only. Not a Loan Estimate, approval, or commitment to lend. Program availability and eligibility are subject to lender guidelines, credit approval, property review, and underwriting.
References
1. City of Philadelphia – Real Estate Tax
2. City of Philadelphia – Learn how to lower your property tax bill ahead of the next valuations
3. RentCafe – Philadelphia rents
4. apartmentlist.com: Cost of Living in Philadelphia
This article is part of Lendmire’s DSCR loan program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: How Much a DSCR Loan Shrinks When Airdna Drops After Your Offer · How Much a DSCR Loan Lends After a Low Appraisal on a Cash Buy · How Much a DSCR Loan Lends on a Non-Warrantable Condo Out of State
Guides: DSCR Loans in Philadelphia, PA · DSCR Loans in Pennsylvania
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
- Mortgage Loan Originator · NMLS# 1129696 · Verify on NMLS Consumer Access
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Disclosure information. Lendmire is a state-licensed mortgage brokerage under NMLS# 2371349. Lendmire is not a depository institution, direct lender, or financial advisor — all loans referenced are placed through wholesale lender partners and are subject to each lender's underwriting standards. This article is provided for general informational purposes and is not a commitment to lend, nor does it constitute financial, legal, or tax advice. Loan programs, terms, rates, and qualification standards change without notice and depend on borrower profile, property type, and the state in which the subject property is located. Equal Housing Opportunity provider. NMLS Consumer Access: nmlsconsumeraccess.org.