The Quick Read: On a duplex you live in, a conventional cash-out refinance lets you borrow up to 75% of the appraised value, compared with 80% on a one-unit home. The new loan replaces your current first mortgage entirely. That is the whole trade-off if you are holding a low-rate loan: you reprice the full balance, not just the cash you take out. Your loan must also be old enough, and you must have been on title long enough, to qualify.
Key takeaways
- A two-unit home you live in is capped at 75% of value for cash-out. A one-unit home is capped at 80%.
- The first mortgage you pay off must be at least 12 months old. At least one borrower must have been on title for 6 months.
- Rent from the unit you do not live in can help you qualify, but it must be documented and is reduced.
- If you want to keep your low-rate first mortgage, a second loan on top is the alternative to compare.
- Moving out changes the loan type. Tell your loan officer before you apply.
What “Lock-In” Means for a Cash-Out Refinance
A lock-in homeowner has a first mortgage they like and do not want to lose. The agency guidelines have no special “lock-in” rule, so this is simply the standard cash-out rulebook applied to your situation.
Here is the mechanic. A cash-out refinance pays off your existing first mortgage and replaces it with a larger one. You keep the difference as cash. The CFPB describes it the same way: you replace your mortgage with a bigger one and take the difference. The new terms apply to the entire balance.
That is why lock-in owners hesitate. The old balance is not grandfathered. It moves into the new loan at whatever terms the new loan carries.
Lendmire’s cash-out refinance programs work this way. Lendmire is a mortgage broker and arranges these loans through wholesale lenders. A second lien is the way to leave your first loan alone, and the comparison is further down.
What Changes When the Home Is a Duplex?
Three things change: the leverage cap, the way income is counted, and how closely the lender checks occupancy.
On a principal residence, a duplex counts as a two-unit home. You live in one unit and rent the other. The lender treats that as an owner-occupied loan, which is far friendlier than an investment-property loan. But the guidelines still give multi-unit homes less leverage than single-family homes.
On the files Lendmire arranges, the conventional cash-out cap is 80% of value on a one-unit principal residence and 75% on two- to four-unit principal residences. The Fannie Mae Eligibility Matrix lists the same split. Freddie Mac follows its own tables, but it also holds two- to four-unit cash-out below the one-unit level.
Do not confuse these with purchase numbers. Purchase loans on two- to four-unit homes reach higher leverage. Limited cash-out refinances also reach higher leverage, but they give you almost no cash. Cash-out is the lower-leverage product.
Occupancy is the other piece. Freddie Mac’s cash-out guide says every borrower on a primary-residence loan must occupy the home. If you have moved out, you no longer fit this loan. That is the one-sentence answer: occupancy decides which leverage rules apply, so tell your loan officer where you live before you apply.
How the Cash-Out Limit Works on a Duplex
The maximum new loan is the appraised value times the cap. Your cash is that loan minus your payoff, closing costs and prepaids (taxes and insurance paid up front into escrow).
Here is the same situation on two homes. Both appraise at 100% of value. Both carry a current balance equal to 50% of that value. This is an illustration, not a market figure.
| Item | One-unit home | Duplex you live in |
|---|---|---|
| Cash-out cap | 80% of value | 75% of value |
| Current balance | 50% of value | 50% of value |
| Room before costs | 30% of value | 25% of value |
| Mortgage insurance | Not an issue | Not an issue |
Same equity, less cash. The duplex loses five points of value to the lower cap. Then closing costs come out of what is left, and they apply to the whole new loan, not only the cash portion. The CFPB makes the same point about closing costs on its cash-out page.
Mortgage insurance does not come into play here. Insurance is required above 80% loan-to-value (LTV, the loan as a percentage of the home’s value). A cash-out on a duplex caps out below that line.
One more limit matters. Adding cash to your payoff can push the new loan above your county’s conforming loan limit. The Federal Housing Finance Agency (FHFA) sets those limits each year, and the limit applies to the new loan amount. A balance that sits under the limit today can cross it once cash is added. Above the limit, jumbo programs take over, with a higher score floor and different rules.
Some wholesale lanes stretch leverage higher on a primary residence, with a higher score and tighter ratio conditions. Whether a two-unit home fits one of those lanes is a file-level question. Do not plan around it until a loan officer confirms it.
Seasoning and Eligibility
Seasoning is the waiting period a lender wants before you can cash out. Two clocks run at once, and both must be satisfied.
Under Fannie Mae’s cash-out rules, the first mortgage you are paying off must be at least 12 months old. That is counted from the old note date to the new note date. At least one borrower must have been on title for six months before the loan funds.
Exceptions exist:
- Delayed financing. A buyer who paid cash within the past six months can borrow against the home, with documentation that the purchase had no mortgage. Cash-out leverage limits still apply.
- Inheritance and legal awards. The six-month title rule has exceptions for these.
- Subordinate liens. The 12-month test applies to the first mortgage, not to a second loan you pay off.
- Listed homes. A home that was listed for sale must be off the market by the time the loan funds.
For most lock-in homeowners, seasoning is not a problem. If you have held the same loan for years, both clocks passed long ago. It trips up two groups: people who refinanced into the low-rate loan less than a year ago, and recent buyers. Lendmire’s piece Conventional Cash-Out Seasoning Rules for a Free-and-Clear Homeowner goes deeper on the waiting-period side.
Credit and ratios come next. The wholesale conventional programs generally start at a 620 decision score. Most files run through automated underwriting, which sets a total debt-to-income (DTI) ceiling of 50%. DTI is your monthly debts divided by your monthly income. Loans underwritten by hand use tighter ratios, 36% or 45%, with reserve and score factors from the Eligibility Matrix.
Reserves matter too. Fannie Mae requires six months of reserves on automated files when DTI is above 45%. Reserves are savings you could use to cover the mortgage payment after closing.
How Rental Income From the Other Unit Is Treated
Rent from the unit you do not live in can count toward your qualifying income, but it is documented and reduced.
Freddie Mac’s two- to four-unit page confirms that rent from the other units can be added when calculating income and ratios. The lender does not take the lease at face value, though. It applies a reduction for vacancy and upkeep. Fannie Mae’s job aid on accessory units shows a 25% reduction in its example. Treat that as an illustration of the idea, not a promise of how your file will be calculated.
Documentation usually depends on your rental history:
- Your tax return’s rental schedule, if you have rented the unit before.
- A current signed lease for the other unit.
- The appraiser’s market-rent schedule, which comes with the appraisal on a multi-unit home.
- Proof of property management experience, which can affect how much income counts.
Rent is a double-edged lever. It can pull your DTI down. But once it is reduced and documented, it often adds less than owners expect. Ask your loan officer to run the file two ways: with the rent, and without it. If the loan only works with the rent, you want to know that before you commit.
The appraisal matters here too. Freddie Mac says a cash-out refinance requires a new appraisal and an inspection report. On a duplex, that means the appraiser values both units and gives an opinion of market rent.
Cash-Out vs. a Second Lien: The Lock-In Comparison
If your first mortgage is one you want to keep, a second loan on top leaves it untouched. A home equity loan or a home equity line of credit (HELOC) sits behind your first mortgage. The CFPB’s research blog notes that these products leave the first lien in place, while a cash-out replaces it.
| Factor | Cash-out refinance | Second lien |
|---|---|---|
| Your first mortgage | Paid off and replaced | Stays as it is |
| Number of payments | One | Two |
| Rate type | Set by the new loan | Often adjustable on a HELOC |
| Closing costs | Apply to the whole new loan | Apply to the new loan only |
| Leverage | Capped at 75% on a duplex | Combined leverage still counts |
Combined loan-to-value (CLTV) is the key point. The agencies count your first and second loans together. Keeping your first mortgage does not escape the leverage limits.
Here is a breakeven walkthrough you can do with any numbers:
1. Define the cash need. A fixed amount for a defined purpose.
2. Price the second lien. Its cost applies only to the new money.
3. Price the cash-out. Its cost applies to the whole balance, old money plus new.
4. Blend the second-lien path. Weight your old first-mortgage rate by its balance and the second-lien rate by the new money.
5. Compare. The cash-out must beat that blended cost by enough to cover its closing costs.
The larger the old balance and the lower its rate, the harder it is for a cash-out to win. A small cash need on a big, cheap first mortgage usually favors a second lien. The agency guidelines do not rank the two options. The answer depends on your numbers.
When a Cash-Out Still Makes Sense
A cash-out can still win for a lock-in owner in four situations.
- A large cash need. If the amount is bigger than a second lien can reach within combined leverage limits, only a cash-out may work.
- An adjustable first loan about to reset. If the loan you are protecting stops being the low-cost loan, protecting it loses its point.
- Debt consolidation. The CFPB’s research on cash-out and non-mortgage debt says paying off other debts with equity can make sense when the cost of the cash-out is lower than the cost of those debts. It also warns that turning unsecured debt into mortgage debt puts the home at risk if payments are missed.
- A first loan that no longer fits. A term that is too long or a structure that no longer suits you can be a reason to start fresh.
Be honest about the costs. The new loan is larger, so the payment may rise. The term may also restart, which stretches out the time it takes to pay the mortgage off. The CFPB’s home equity guide says both. Fannie Mae allows any use of the cash, but permission is not the same as a good idea. Cash-out refinances can raise foreclosure risk because they carry bigger balances.
This one is a genuine toss-up for many owners. The 75% cap leaves a duplex owner less cash for the same equity, and a larger loan carries more risk. A smaller second lien can look better on paper. The cash-out can look better if your goal is a full reset.
Where the Conventional Rule Breaks
The rules above assume you live in the home. Several situations break that assumption.
- You move out. The loan stops being a principal-residence loan. Occupancy rules decide which program applies, and the leverage and documentation change with it.
- Your loan is above the conforming limit. It becomes a jumbo loan with a higher score floor and different rules.
- You need a limited cash-out instead. A rate-and-term refinance reaches higher leverage but gives only incidental cash back. Fannie Mae’s limited cash-out rules are a separate product, and the highest tier, 95.01% to 97%, is for one-unit homes only.
- Your lender adds its own rules. A lender can be stricter than the agency guide. Some set higher score floors or lower caps. The agency rule is the minimum, not the guarantee.
- You are in Texas. A cash-out on a Texas homestead also has to satisfy the state constitution’s own home-equity limits, so the agency caps above are not the only test. The wholesale lane that reaches higher leverage is not written there.
If you rent out the entire duplex, you are no longer in owner-occupied territory at all. That is an occupancy question to settle with your loan officer first.
The Process, Step by Step
A cash-out on a duplex follows a set order.
1. Confirm occupancy. You live in one unit, and every borrower on the loan occupies the home.
2. Check both seasoning clocks. The first mortgage must be 12 months old, and one borrower must have been on title for six months.
3. Order the appraisal. On a two-unit home it covers both units and the market rent.
4. Qualify your income. The lender documents your earnings and, if you use it, the other unit’s rent.
5. Run automated underwriting. The system returns a finding on score, DTI and reserves.
6. Review the disclosures. You receive a Loan Estimate and, later, a Closing Disclosure. Compare the two.
7. Close. The payoff goes to your old servicer, and you receive the cash. Your old escrow balance is refunded afterward.
What decides the outcome: the appraised value, your payoff, the seasoning clocks, your DTI with documented rent, reserves and your credit score.
One piece of practitioner advice. On duplex files, the appraisal and the rent documentation cause most of the surprises. Ask for the rent schedule early and compare it with what you collect. A gap between the lease and the appraiser’s number is worth understanding before you apply.
A Decision Checklist
Work through these in order.
1. Is your first rate worth keeping? If it is well below what a new loan would carry, lean toward a second lien.
2. Is the cash need defined? A fixed amount for a clear purpose beats an open-ended number.
3. Does the net cash justify the cost? Subtract closing costs and prepaids from the room under the cap.
4. Do you qualify without the rent? If the answer is no, treat the file as tighter than it looks.
5. Can you carry the new payment? A larger loan and a restarted term can raise your monthly cost.
Tax treatment can depend on your situation; borrowers should speak with a qualified tax professional before relying on any deduction or credit.
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.
Key Terms Defined
Cash-out refinance: a new first mortgage that pays off your old one and gives you the difference in cash.
Loan-to-value (LTV): the loan amount as a percentage of the home’s appraised value.
Seasoning: the waiting period a lender requires, such as the age of your current loan or your time on title.
Debt-to-income ratio (DTI): your total monthly debts divided by your gross monthly income.
Market-rent schedule: the appraiser’s opinion of what each rental unit would earn, included with a multi-unit appraisal.
Combined LTV (CLTV): your first and second loans added together, as a percentage of value.
Frequently Asked Questions
Can I cash-out refinance a duplex I live in?
Yes, if you occupy one unit as your principal residence. The conventional cap is 75% of the appraised value, compared with 80% on a one-unit home. Seasoning, credit, DTI and reserve rules apply, subject to lender guidelines and full file review.
Does the rent from my other unit count toward qualifying?
Usually, but not in full. Rent from the other unit is documented with a lease, tax return or appraisal rent schedule, and it is reduced for vacancy and upkeep. Rent from the unit you live in generally cannot be used.
Will I lose my current rate?
Yes, on a cash-out refinance. The new loan replaces your first mortgage, so its terms apply to the whole balance. A second lien is the way to leave the first mortgage in place, though combined leverage limits still apply.
How long do I have to wait before cashing out?
The first mortgage you are paying off must be at least 12 months old, counted from note date to note date. One borrower must also have been on title for six months. Delayed financing, inheritance and legal awards have exceptions.
What if I move out of the duplex?
Tell your loan officer first. The loan is built for a principal residence, and Freddie Mac requires borrowers to occupy the home. Once you move out, a different set of occupancy rules decides which program applies.
For your own numbers, request a scenario review with Lendmire.
About Lendmire
Lendmire (NMLS# 2371349) is a mortgage brokerage serving homeowners and home buyers in 16 states. FHA, VA, conventional and jumbo purchase and refinance loans are arranged through wholesale lending channels; Lendmire brokers the financing and the lender underwrites each application. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
For the program’s current guidelines, see conventional loan programs.
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References
1. CFPB, What Other Types of Loans Are Similar to a HELOC?
2. Fannie Mae Eligibility Matrix
3. Freddie Mac Guide 4301.5, Cash-Out Refinance Mortgages
4. Fannie Mae Selling Guide B2-1.3-03, Cash-Out Refinance Transactions
5. Freddie Mac 2- to 4-unit properties page
6. Fannie Mae ADU and Boarder Income Job Aid
7. CFPB cash-out and paydown research
8. CFPB older Americans home-equity guide
9. Fannie Mae’s limited cash-out rules
This article is part of Lendmire’s Conventional Loans series — every loan program’s qualification details, guidelines, and scenarios live on the loan options page.
Related reading: Can a Lock-in Homeowner Get a Conventional Cash-Out After Delisting? · Conventional Cash-Out Refinance Electronic Verification Rules · Conventional Cash-Out Refinance Rules for a Texas Homestead
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Required disclosures. Lendmire (NMLS# 2371349) operates as a licensed mortgage broker, not a direct lender or depository. The discussion in this article is general in nature and should not be relied upon as financial, legal, or tax advice — every investment scenario is unique and should be reviewed by a qualified professional. Any loan inquiry is subject to lender underwriting, and this article is not a commitment to lend or a guarantee of approval. Mortgage rates, loan terms, and program guidelines vary by borrower, property, and state, and may change without notice. Equal Housing Opportunity. Verify licensure at NMLS Consumer Access.