How to Compare a Cash-Out Refinance to a Second Mortgage

The Quick Read: A cash-out refinance replaces your existing first loan with a larger one, while a second mortgage leaves the first loan alone and adds a separate loan behind it. The right choice depends on what your current first loan costs to keep, how much cash you need, and how much rental coverage the property keeps afterward. Run both paths on the same cash amount before you pick.

• A cash-out refinance reprices the whole balance. A second mortgage prices only the new money.
• A second mortgage adds a second payment. A cash-out refinance keeps one payment.
• Investment-property second liens are scarce and often cap at 70% combined leverage.
• Most cash-out refinances on rentals in Lendmire’s wholesale network top out around 75% LTV.
• Clearing 1.00 coverage is not the same as positive cash flow.

Investors usually frame this as a rate question. It is a whole-balance question. The comparison below is the one a broker runs when an investor calls with a rental, a first mortgage already in place, and a number in mind for cash.

What Is the Real Difference Between the Two?

The difference is lien position. A cash-out refinance pays off the first loan and replaces it with a new first lien for the old balance plus the cash you take. A second mortgage, also called a junior lien, sits behind the first loan and leaves it untouched.

The CFPB describes a second mortgage as a loan taken out against a home while another loan is still secured by it. In a forced sale, the second lender is paid second. If equity runs short, that lender may not be repaid in full. That is why junior liens usually price higher than first liens.

Home equity loans and HELOCs both fall under the second-mortgage label. The CFPB’s home equity guide notes that a home equity loan paired with an existing mortgage means a second, separate monthly payment. A HELOC is the revolving version. A home equity loan is the lump-sum version.

Key Terms Defined

Cash-out refinance: A new first mortgage that pays off the old one and returns the extra equity to you as cash.

Second mortgage (junior lien): A loan secured by the same property that ranks behind the first mortgage.

HELOC: A revolving line of credit secured by the property, usually with an interest-only draw period followed by repayment.

LTV: Loan balance divided by property value, counting one loan.

CLTV: Combined loan-to-value, counting every lien against the property.

DSCR: Monthly rent divided by the full monthly obligation on the property: principal, interest, taxes, insurance, and any HOA dues.

How Underwriting Treats Each Path, Step by Step

On a cash-out refinance, underwriting sizes one loan. The lender looks at one LTV figure on the new first lien. Across Lendmire’s wholesale network, cash-out refinances on standard rentals tend to top out around 75% LTV, with about 6 months of seasoning the common expectation. Short-term-rental collateral is tighter, with cash-out at 70%.

A second mortgage is sized on CLTV. The first balance and the new line are added together and divided by value. The room left is the value times the CLTV ceiling, minus what is already owed.

Here is where the paths split for investors:

1. The qualification test. A DSCR cash-out qualifies primarily on property-level rental income covering the payment, subject to lender guidelines. Most programs want a score near 660, with 700+ opening the strongest leverage tiers. A home equity line is judged differently, on personal credit and debt-to-income.

2. Credit minimums on equity lines. On a standalone investment-property equity line in the wholesale network, the minimum credit score is 700 and the program ceiling is 70% CLTV, with a maximum line of $500,000. Market surveys report investment HELOC credit scores commonly at 720 or above. The network figure is the 700 minimum.

3. Who holds title. This is the sharpest structural split. An equity line requires title held by the individual borrower or a revocable living trust. LLCs, corporations, partnerships, and irrevocable, blind, or land trusts cannot hold title on it. A property already deeded to an LLC needs a vesting change or a DSCR cash-out instead. A DSCR cash-out can run on an LLC-held rental, subject to program terms.

4. Valuation. Equity lines at or below $500,000 ordinarily use an automated valuation, though a higher CLTV may require a secondary valuation. A DSCR cash-out relies on a full appraisal that includes a rent schedule (Form 1007 for one unit, Form 1025 for two to four units).

5. Documents. A refinance needs the appraisal, lease or rent roll, entity papers, a payoff statement, and insurance. A second adds the first-lien note and mortgage so the lender can check for added-lien language and prepayment terms.

Structures and Variations That Exist

A cash-out refinance on a rental in the network is mostly a 30-year fixed. Extended 40-year terms and interest-only periods are available through select lenders, and ARM structures exist for investors who want them. Loans run up to $3,000,000 on standard programs (smaller balances available through select lenders), and above $2,500,000 the network generally holds to 30-year fixed.

Second-lien structures look different. A standalone line in first or second lien position runs from $25,000 to $750,000 overall. On an investment property it caps at $500,000, and the only structure available is a 5-year interest-only draw followed by a 25-year fully amortizing repayment. At least 75% of the line is drawn at closing. Pricing floats during both periods and never converts to fixed.

That matters for stress testing. Investors face a smaller pool of lenders and borrow less than against a primary home. Interest-only draws also mean the payment steps up when repayment starts.

How Do You Actually Run the Comparison?

Model both paths on the same cash amount. The deciding number is blended cost versus replacement cost.

Start with the existing first. If it is a legacy loan that costs well under what a new first lien would, a refinance reprices every dollar of that balance upward to pull out a smaller slice of equity. In that case a second lien on the cash portion alone can be cheaper overall, even though the second carries a higher price on its own.

Reverse the setup. If the existing first is already priced near today’s market, replacing it costs little, and one new loan with one payment is cleaner. Cash-out closing costs apply to the whole new balance, which consumer publishers describe as higher in dollar terms. Second liens usually cost less to close.

Compare these four items side by side:

• Blended cost of old first plus new second against one new first, on the same cash
• Closing costs, and how long you will hold the property to spread them out
• Whether the cash earns more than the cost of repricing the full balance
• Post-closing DSCR cushion

Take an investor with a rental carrying a first mortgage well below market cost and a modest cash need. Keep the first, add a second, and the repricing cost never applies. But if rent only covers the first payment at around 1.15x, adding a second payment can pull coverage toward or below 1.00. Now flip it. The same rent against a single larger refinanced payment may land near 1.05x. Different structures, different cushions. Model both.

Where the General Rule Breaks

The cheap first mortgage. A low legacy first loan is the usual reason to keep the first and add a junior lien.

An existing second when you refinance the first. The second must be paid off, rolled into the new loan, or subordinated. The junior holder is not required to subordinate, so a second does not stay in second position automatically after a refinance.

Paying off a second still may count as cash-out. Some lenders treat a refinance that pays off a non-purchase second as cash-out. Lenders set their own treatment, so confirm it before assuming rate-and-term pricing and leverage.

The first mortgage blocks the second. Added-lien clauses or prepayment terms in the first-lien documents can stop a second lien cold.

Rental equity lines are hard to find. Beyond the thin pool, eligibility is narrow. Manufactured homes, co-ops, condotels, log homes, commercial, mixed-use, and agricultural zoning are not eligible for the equity line. Property types that fall outside DSCR programs, such as manufactured homes, log homes, and barndominiums, are not offered in the DSCR network either.

Exposure caps. An equity-line borrower is limited to three lines, and anyone owning more than 15 financed properties is not eligible.

Short-term rentals. STR cash-out tops out around 70% LTV, with about 12 months of hosting history and a 640+ score expected. STR purchases go to 75%. 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. Final terms depend on the lender’s guidelines, the property type, and the borrower’s complete credit picture.

Coverage below 1.00. Many select programs start at 1.00 coverage, while a separate select-lender path takes coverage below 1.00 with leverage and terms adjusted. A second payment is what pushes most files toward that line.

What the Decision Looks Like in Practice

Lean toward the cash-out refinance when the existing first is not cheap, the cash need is large relative to the balance, and the property title is in an LLC. One loan, one payment, one lien, and a DSCR test that looks only at the property.

Lean toward a second mortgage when the first is cheap, the cash need is small, and the title sits with an individual or revocable trust. Expect a thin lender pool and a 70% CLTV ceiling on investment property.

Watch the debt load either way. The CFPB notes that a second mortgage adds to your overall debt burden and makes you more vulnerable if you hit financial trouble. And DSCR counts only rent against the full monthly obligation. Repairs, vacancy, management, utilities, and capex sit outside it, so clearing 1.00 is not positive cash flow.

Reserves matter on both paths. They vary by lender, leverage, loan size, and transaction type, commonly around 6 months of PITIA, stepping up toward about 9 months on larger loans. A larger equity position lowers the payment and can lift the ratio, but it never erases leverage caps, credit floors, or reserve rules. The strongest files clear both tests: enough equity and enough rental coverage.

On tax: tax treatment varies; consult a qualified professional.

For the full program picture, see Lendmire’s complete DSCR loans guide. For a deeper look at a related question, Lendmire’s piece Cash-Out Refinance vs Second Lien on a Rental With a Low First Mortgage covers the low-first-mortgage case.

If you are weighing a second lien against a cash-out refinance and want to see how the numbers work, Lendmire can help you compare options based on the property, the equity available, credit profile, combined leverage, and your goals. Reach the team at 828-256-2183 or request a quote.

A deeper walk-through of investment-property equity extraction lives in Lendmire’s guide to cash-out refinance on an investment property.

For current guidelines and terms, see Lendmire’s DSCR loan programs page.

About Lendmire

Lendmire — NMLS# 2371349 — is a DSCR-focused mortgage broker. It arranges DSCR investor loans, including cash-out refinances on rental properties, across 40 states plus Washington, D.C. (41 markets) through select wholesale lenders. In its 16 full-service states it also arranges standalone home equity lines as first or second liens on primary residences, second homes and investment properties. Lendmire is never the lender, and every loan is subject to the lender’s guidelines and full underwriting. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.

References

1. CFPB – What is a second mortgage loan or junior lien?

2. CFPB – Using home equity to meet financial needs