The Quick Read: On a true cash-out refinance, rent from your accessory dwelling unit usually adds nothing to the income you qualify with. The rent can count when the loan is a purchase or a limited cash-out refinance. A low first mortgage pushes you toward the true cash-out category, because more of the new loan becomes cash in your hands. Program rules and lender guidelines decide each file, and nothing here is a commitment to lend.
Key Takeaways
- Loan purpose decides everything. The same rented ADU can help on one loan type and count for zero on another.
- A low payoff means cash-out. The bigger the gap between your old balance and the new loan, the less likely the file is “limited.”
- When rent does count, it is trimmed. It gets a haircut for vacancy and is capped as a share of your total qualifying income.
- Rent never raises the loan ceiling. The ceiling comes from your home’s appraised value. Rent only moves your debt-to-income ratio.
- A second lien is the main alternative. It leaves your low first mortgage untouched.
What Is an ADU, and Why Does It Matter Here?
An ADU is a separate living space on the same lot as your home. It has its own sleeping, cooking and bathroom areas. It can be a basement suite, a garage conversion, an attached addition or a backyard cottage.
Cash-out refinance estimate
The starting figures are an example value with a balance and a cash request in proportion. Replace them with yours.
Editable benchmark: 7.40% as of October 15, 2026 · Freddie Mac 30-year average via FRED®. A conventional market reference, not a cash-out refinance quote.
Illustrative starting assumptions: a $350,000 home value, a $193,000 current balance, the agency cap on a one-unit principal residence, a thirty-year term at the current Freddie Mac benchmark, and property taxes and insurance estimated at typical national rates. Every field is editable.
Illustrative estimate only — not a Loan Estimate, approval, quote, or commitment to lend. The rate field carries the weekly Freddie Mac thirty-year conventional benchmark, a market reference and not a cash-out refinance quote; a cash-out loan is priced by the lender at lock. The cash available is the loan the program cap allows less the balances paid off, before closing costs, which are not included. The HELOC line is the program’s combined loan-to-value ceiling applied to the same value and balance. Taxes and insurance are editable estimates. Licensed in sixteen states for consumer mortgages.
For loan purposes, a house with one ADU generally still counts as a one-unit property. That matters because the rental-income rules for a one-unit primary residence differ from the rules for a two- to four-unit building.
Most lenders treat income from your own home with suspicion. The reasoning is simple: you live there, so the rent isn’t a separate business. ADU rent is a narrow exception to that skepticism, and the exception comes with conditions.
Which Loan Type Are You Actually Applying For?
Three loan purposes get mixed up constantly, so it helps to separate them before comparing options.
- Cash-out refinance: The new loan pays off your first mortgage and puts meaningful cash in your pocket.
- Limited cash-out (rate-and-term) refinance: The new loan pays off the existing first mortgage and closing costs, with only incidental cash back. In the wholesale programs Lendmire places files with, leverage on a one-unit primary residence goes to 95%, and higher where the first-time-buyer program allows.
- Purchase: You are buying the home and the ADU rent supports your qualifying.
Here is how ADU rent is treated for each, by program:
| Program | Purchase | Limited / no cash-out | True cash-out |
|---|---|---|---|
| Fannie Mae | Can count | Can count | Does not count |
| FHA | Can count | Program-specific | Does not count |
| VA streamline refinance | Not applicable | No cash, no income review | Not applicable |
The VA row works differently because a streamline is not a cash-out product at all. A VA borrower who wants cash needs a separate VA cash-out loan.
Why a Low First Mortgage Changes the Math
A low first mortgage means your payoff is small compared with your home’s value. Most of the new loan is then cash back, and that makes it a cash-out refinance by definition.
Picture a homeowner who owes about 20% of the home’s value. A cash-out refinance on a one-unit primary residence goes to 80% LTV on the conventional programs. LTV, or loan-to-value, is the new loan divided by the appraised value. The new loan would pay off that 20% and release a large slice of equity. Terms vary by lender guidelines, property type, leverage, credit profile, and full file review.
That file is clearly cash-out. The ADU rent drops out of your income. You qualify on your paycheck, self-employment income or other documented income alone.
Many homeowners with a low balance hope to squeeze the loan down to “limited” by taking very little cash. That works only when you truly want little cash. If you want meaningful proceeds, the label follows the cash, not your preference.
Across the wholesale programs Lendmire works with, this can come as a surprise on ADU files. Borrowers expect the rented unit to widen their approval, and it narrows to nothing once the file is classified as cash-out. Asking the loan officer to classify the transaction before the appraisal is ordered avoids an unwelcome conversation later.
Where the Rules Come From
Fannie Mae’s Selling Guide Announcement SEL-2025-08 allows ADU rent toward qualifying income under four conditions:
- The property is a one-unit principal residence.
- The loan is a purchase or a limited cash-out refinance.
- Rent from only one ADU counts, even if you have several.
- Qualifying ADU income can’t exceed 30% of your total qualifying income.
It counts 75% of the gross monthly lease rent. If there is no lease, it counts 75% of the market rent from the appraiser’s rental analysis. The missing 25% covers vacancy, maintenance and surprises.
FHA is stricter. HUD’s Mortgagee Letter 2023-17 says ADU rental income can’t be Effective Income on a cash-out refinance.
VA’s streamline route is different again. The VA IRRRL can’t return cash, and it requires no credit underwriting package. Your ADU income isn’t an input at all. If you want cash on a VA loan, you need a separate VA cash-out refinance, which is fully underwritten. Treatment of ADU rent there varies by lender.
How ADU Rent Becomes Qualifying Income
Say you are buying a home or doing a limited cash-out refinance, and the rent is eligible. The steps run like this:
1. Confirm the property. It must be a one-unit principal residence with a legal ADU.
2. Document the rent. Use a signed lease or the appraiser’s rent estimate for the ADU. If no ADU rental comparables exist, the appraiser may use similar non-ADU rentals with adjustments.
3. Apply the haircut. Fannie Mae’s guidance reduces the rent by 25% for vacancy and loss.
4. Apply the cap. The result can’t exceed 30% of your total qualifying income.
5. Check landlord experience. Under Fannie Mae’s rules, if you have less than 12 months of property-management experience and you carry a housing payment, rent used for lender review can’t exceed that housing payment.
6. Run the ratios. Counted rent lowers your debt-to-income ratio, or DTI, which compares monthly debts to monthly income.
Here is a labeled illustration with no dollars, using made-up proportions. Say your gross ADU rent equals half of your other monthly income. Take 75% of it and you get 37.5% of your other income. That is over the 30% ceiling, so the cap binds and extra rent adds nothing.
Now say your rent equals 20% of your other income. Take 75% and you get 15%. That sits under the cap, so all of it counts. Rent helps most for borrowers with modest rent and a DTI near the edge. It helps least for borrowers with big rent and big income, or any borrower whose DTI is already comfortable.
Rent Helps Your Ratio, Not Your Loan Size
Rent never makes the loan bigger. The maximum loan comes from the appraised value and the LTV cap. On the conventional cash-out refinance lane, that is 80% on a one-unit principal residence and 75% on two- to four-unit principal residences. The appraiser values the whole property, ADU included, so a real ADU can raise the value. That is how an ADU helps with size, and it has nothing to do with rent.
Your ratios decide whether you qualify at that size. Across the programs Lendmire places files with, automated approvals allow a total ratio up to 50%, and manually underwritten loans typically sit at 36% or 45% with reserve and score conditions. These are guideline figures, subject to lender review.
Cash-out files also face a few seasoning rules. The first mortgage being paid off must be at least 12 months old, and you generally need to be on title for 6 months, with exceptions for delayed financing, inheritance and legal awards. Fannie Mae also applies minimum reserves on cash-out refinances with DTI above 45%.
Cash-Out or a Second Lien? The Low-Balance Question
If you hold a low first mortgage and want cash, you have two broad paths. A cash-out refinance replaces your first mortgage with a new, larger one. A home equity loan or HELOC leaves your original first lien in place, per the CFPB‘s research blog on cash-out refinances.
That distinction is the whole point for a low first mortgage. Refinancing swaps out the loan you have, and a second lien keeps it. Which one wins depends on your existing loan terms and the new loan’s terms, and your loan officer can compare both.
The new loan can also change your rate and term, and it may raise your monthly payment or stretch your payoff timeline. Rolling debts into the mortgage puts your home behind them, which matters if payments later become hard to carry.
For a deeper look at how much cash a refinance can fund over a small first mortgage, see Lendmire’s piece How Much Down Payment a Cash-Out Refinance Gives on a Low First Mortgage. Lendmire’s overview of cash-out refinance programs covers the products themselves.
Where the General Rule Breaks
Five edge cases change the answer:
- Existing rental history. If the ADU is already rented and appears on your tax return, Fannie Mae’s rental-income page accepts Schedule E showing 365 fair rental days. A documented history is far easier to use than a new lease.
- Two- to four-unit properties. Those follow different rental-income rules that aren’t ADU rules. FHA may allow rental income on cash-out for them.
- Unbuilt or unpermitted units. Projected rent from a unit that doesn’t exist doesn’t count, and illegal units fail the legality test.
- Short-term rentals. Some lenders will review Schedule E income from short-term renting. Treatment is lender-specific, so ask before assuming.
- Lender overlays. An individual lender can be stricter than the agency rules, and it is common for a lender to add its own conditions.
A recent rule change also matters. Fannie Mae has restructured its rental-income policy in the Selling Guide, Chapter B3-3. Section numbers have moved, so ask your lender which version applies to your file.
Five Mistakes Borrowers Make
- Counting 100% of the rent. The haircut and cap trim it.
- Assuming more ADUs means more income. Only one ADU’s rent counts at Fannie Mae.
- Expecting rent to raise the loan amount. Value sets the ceiling, and rent touches DTI only.
- Assuming a VA streamline can return cash or use ADU rent. It can’t.
- Treating a HELOC and a cash-out refinance as the same thing. One replaces your first mortgage, and the other doesn’t.
Tax treatment can depend on your situation; borrowers should speak with a qualified tax professional before relying on any deduction or credit.
Key Terms Defined
ADU (accessory dwelling unit): A separate living space on the same lot as your home, with its own sleeping, cooking and bathroom areas.
Cash-out refinance: A new mortgage that pays off your old one and gives you meaningful cash from your equity.
Limited cash-out refinance: A new mortgage that pays off your old one and closing costs, with only a small, capped amount of cash back.
LTV (loan-to-value): The loan amount divided by your home’s appraised value.
DTI (debt-to-income): Your monthly debt payments compared with your monthly income.
Seasoning: The minimum time you must have held a loan or the property before a refinance qualifies.
Questions to Ask Your Lender
- Will my loan be classified as cash-out or limited cash-out, and at what amount of cash back does that change?
- Does ADU rent count for my loan purpose and program?
- Is my ADU recognized as legal and permitted for this loan?
- What documentation do you want for the rent: a lease, traditional personal-income documentation or an appraisal rent schedule?
- How does your lender treat rent beyond the 30% cap?
Frequently Asked Questions
Can I use ADU rent if the unit isn’t built yet?
Generally no. Rent used for lender review comes from an existing, legal unit, documented by a lease or an appraiser’s rent estimate. Projected rent from a unit still on paper isn’t a reliable input. Some borrowers use cash-out proceeds to build the ADU, then use the rented unit’s history on a later transaction.
Does ADU rent count on an FHA cash-out refinance?
No. ADU rental income can’t be used as Effective Income on an FHA cash-out refinance. A one-unit property with a single ADU stays classified as one unit.
Why doesn’t a limited cash-out refinance help someone with a low first mortgage?
It allows only incidental cash back, so it fits a borrower who wants a better loan, not meaningful equity. If your payoff is small and you want real cash, the file becomes a standard cash-out, and ADU rent falls out of your income.
Does more ADU rent let me borrow more?
No. Borrowing is limited by the appraised value and the LTV cap, and rent only influences your DTI. Where rent is eligible, it also gets a haircut and a cap, so past a point additional rent adds nothing.
Is a HELOC better than a cash-out refinance when my first mortgage is low?
It depends on your situation. A HELOC leaves your current first mortgage in place, while a cash-out refinance replaces it. Your loan officer can compare the terms of both against what you want to do with the cash.
If you are weighing a cash-out refinance against keeping the loan you have, Lendmire can help you compare the programs and the equity each one reaches on the home you live in. You can request a scenario review to see your options.
For current guidelines and terms, see Lendmire’s refinance programs page.
About Lendmire
Lendmire, NMLS# 2371349, is a mortgage brokerage with consumer lending licenses in 16 states. FHA, VA, conventional and jumbo purchase and refinance loans are arranged through wholesale lending partners, and each application is reviewed individually by the lender. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
Get Started
Ready to find the right loan for you?
In about 30 seconds you can review financing options available for your home or investment property. No commitment required.
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. Fannie Mae Selling Guide Announcement SEL-2025-08
2. HUD Mortgagee Letter 2023-17
3. VA IRRRL
4. CFPB
5. Fannie Mae Selling Guide rental income page (B3-3.1-08, now B3-3.8-01)
This article is part of Lendmire’s cash-out refinance program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: How Much Does a Cash-Out Refinance Cost? · Is Consolidating Debt Into a Mortgage a Cash-Out Refinance? · How Much a Cash-Out Refinance Frees Up Over a Locked-in First Mortgage
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
- Mortgage Loan Originator · NMLS# 1129696 · Verify on NMLS Consumer Access
- North Carolina Real Estate Broker · License# 343312 · Verify on NCREC
- North Carolina Insurance Producer · License# 19053198 · Property, Casualty, Life, Health · Verify on NAIC SBS
- Lendmire LLC · Firm NMLS# 2371349 · Verify firm licensure
Compliance and disclosures. Lendmire (NMLS# 2371349) is a licensed mortgage broker and is not a direct lender, depository institution, financial advisor, or tax professional. Content in this article is general market analysis and educational information — not financial, legal, or tax advice for any specific situation. Lendmire does not guarantee loan approval; every transaction is subject to underwriting by the funding lender. Mortgage pricing and loan program guidelines are subject to change at any time without notice and vary by borrower characteristics, property type, and state regulations. Lendmire complies with Equal Housing Opportunity. Licensure verification: NMLS Consumer Access.