The Quick Read: A cash-out refinance replaces your first mortgage, so it cannot keep a low first in place. The cash it frees is the program’s leverage ceiling times your home’s value, minus what you owe and the costs financed into the loan. If you want to keep your current first, a second lien is the other route, and the same arithmetic applies with a different ceiling.
Key Takeaways
- A cash-out refinance pays off your old first and writes a new one. The new loan’s rate and term apply to the whole balance, not just the cash.
- Conventional cash-out on a one-unit principal residence tops out at 80% loan-to-value (LTV). That is far below the 95% allowed on a rate-and-term refinance.
- You can never borrow all your equity. The ceiling leaves a cushion behind.
- Keeping the first and adding a second lien leaves your current loan untouched. It usually means a second payment and a different cost structure.
- A lower appraisal can shrink your cash faster than you expect, because the ceiling moves with value.
What Does “Keep a Low First” Actually Mean?
The phrase has two readings, and the math differs for each.
Reading A: you keep the first mortgage you have. You borrow against equity some other way, usually with a second loan recorded behind the first. Your original rate and term stay as they are.
Reading B: you refinance the first and want to know how much cash comes out. The old loan is paid off. A new first mortgage replaces it, and the cash comes from the gap between the new loan and the payoff.
Many homeowners mean A and search for B. That is understandable, since “cash-out refinance” is the name everyone knows. But the two are different products. A refinance cannot leave your old first in place, because paying it off is the whole point of the transaction.
This article covers both. First comes the formula for the refinance route. Then comes the same formula for the keep-the-first route, run on the same house. If you are still comparing options, Lendmire’s cash-out refinance programs page lays out how these loans are arranged for owner-occupied homes.
The Equity a Cash-Out Refinance Frees: The Formula
The formula has four steps.
1. Set the value. An appraisal, or an eligible appraisal waiver, sets what the home is worth.
2. Apply the ceiling. The program caps the new loan as a percentage of that value. Maximum loan equals the cap times the value.
3. Subtract what the loan must cover. That means the payoff of your current first, any other liens being paid off, and costs rolled into the balance.
4. The remainder is your cash.
In short, cash equals the ceiling times value, minus everything already owed, minus financed costs.
Here is the pattern in plain percentages. Say the home appraises at 100% of a value you are using as your baseline. You owe 55% of it. Conventional cash-out on a one-unit principal residence caps at 80%, so the ceiling is 80% of value. Subtract the 55% payoff and you get about 25% of value. Costs financed into the loan come out of that 25%.
That is the whole mechanism. Nothing in it depends on how much equity you feel you have. It depends on how much the program lets you borrow against.
Why the ceiling is lower than you might expect
A home with 45% equity does not free 45% of its value. The ceiling leaves you with equity afterward. On a conventional one-unit principal residence, the Fannie Mae Eligibility Matrix sets cash-out at 80%. The same matrix sets two- to four-unit principal residences at 75%. Every figure here varies by lender and program — guidelines, property type, leverage, and credit profile all apply.
The CFPB’s guide on using home equity says lenders typically expect you to keep a meaningful slice of the home’s value as equity. The ceiling is a feature of the program, not a negotiation with the lender.
Cash-Out vs. Rate-and-Term: Why the Label Matters
The same house, the same borrower, and the same one-unit principal residence can face two very different ceilings. Which one applies depends on how much cash you take.
A refinance, which agencies call “limited cash-out,” pays off your existing first, closing costs, and a purchase-money second lien. Only incidental cash comes back. On a one-unit principal residence the ceiling is 95% LTV, and 97% where the existing loan is agency-owned and the first-time-buyer program allows. Mortgage insurance applies above 80%. Final terms depend on lender guidelines, property type, leverage, and the borrower’s complete credit picture.
Take more than incidental cash and the loan is reclassified as a cash-out refinance, with the 80% ceiling. That gap is large, so the label is not a technicality.
One trap catches people here. Under Fannie Mae’s limited cash-out rules, paying off a second lien that was not part of the purchase financing can turn the deal into a cash-out refinance. That is how a borrower who thought they were doing a simple rate-and-term refinance ends up facing the lower ceiling.
| Factor | Rate-and-term (limited cash-out) | Cash-out refinance |
|---|---|---|
| Cash back | Incidental only | Beyond incidental |
| 1-unit primary ceiling | 95% (97% in some cases) | 80% |
| Mortgage insurance | Required above 80% | Not needed at 80% |
| Seasoning | Per program | 12 months on the old first |
Why Refinancing Reprices Everything
Here is the cost of replacing the first. When the old loan is paid off, its rate and its remaining term go with it. The new loan carries new terms on the entire balance, not only on the cash you took.
It is simply how a refinance works: one old loan out, one new loan in. It is why a low existing first changes the answer so much.
A homeowner holding a low first is holding something worth protecting. Refinancing swaps it for whatever the new loan carries. A second lien leaves the first alone and prices only the new money. The second lien’s own terms may be less favorable than a first-lien refinance, but they apply to a smaller balance.
No one can say in the abstract which is cheaper. The honest comparison is a blended view: your existing first on its balance, plus the second on its balance, against one new loan on the full balance. That is a calculation to ask a loan officer for, with both scenarios written out. Pricing lives on the Loan Estimate, not in an article.
The Keep-the-First Route: Same Math, Different Ceiling
If you leave your first in place and add a second lien, the structure changes in three ways.
- The first is not paid off. Its balance stays on the books and counts against your leverage.
- Every lien counts. Fannie Mae’s subordinate financing rule says lenders must count any subordinate lien when calculating combined loan-to-value (CLTV). A second lien is not invisible.
- The second lender sets its own limit. The combined ceiling on a stand-alone second is lender-set and typically leaves a cushion of equity behind.
The arithmetic mirrors the refinance. Cash equals the combined limit times value, minus the first-mortgage balance, minus costs. Only the limit and the costs change.
If a second lien is also recorded after a refinance, it generally has to be resubordinated, meaning moved behind the new first. That adds a step, and not every second-lien holder agrees to it.
One Home, Two Routes
Take a home you owe 55% of, valued at 100%. Here is how the two routes compare in structure.
| Factor | Refinance (replace first) | Keep first + second lien |
|---|---|---|
| Your current first | Paid off | Stays in place |
| Rate and term | New, on full balance | Old on first, new on second |
| Payments | One | Usually two |
| Ceiling | 80% of value | Lender-set combined limit |
| Cash before costs | About 25% of value | Depends on that limit |
The refinance leaves about 25% of value before costs. The second-lien cash depends on the combined limit the second lender sets. If it matches 80%, the cash is the same before costs. If it is lower, the cash is smaller. You would know only after getting an actual quote.
What a Lower Appraisal Does to Your Cash
The ceiling is a percentage of value. When value drops, the ceiling drops with it, and the balance you owe does not.
The table below uses the 80% cash-out ceiling. All figures are percentages of the value you expected the home to appraise for. These specifics are subject to lender guidelines and a full review of property, leverage, and credit.
| Appraised value | Amount owed | Ceiling at 80% | Cash before costs |
|---|---|---|---|
| 100% | 40% | 80% | 40% |
| 100% | 55% | 80% | 25% |
| 100% | 70% | 80% | 10% |
| 90% | 55% | 72% | 17% |
| 90% | 70% | 72% | 2% |
Look at the last row. A 10% appraisal shortfall on a home with a larger balance takes the cash from 10% to 2%, before costs. At that point the refinance may not be worth doing.
This is what “equity” versus “borrowable equity” means. You may have equity on paper. What you can borrow is what remains after the ceiling is applied and the costs come out.
Is the Refinance Worth It? A Break-Even Method
Closing costs get financed or paid. Either way, they reduce what you receive or increase what you owe. So the decision is partly a time question.
1. Add up the costs of the refinance. Use the Loan Estimate, not a guess.
2. Estimate the monthly difference. Compare your current payment against the new one, or the blended payment under the second-lien route.
3. Divide the costs by the monthly difference. The result is the number of months to break even.
4. Compare that to how long you expect to stay.
If the refinance raises your payment, there may be no break-even at all. That is common when you replace a low first. A cash-out refinance rarely lowers the monthly payment, so be skeptical of claims otherwise.
The decision rule is simple. If you need a large amount and your current first is not far below what the new loan would carry, replacing it can make sense. If you need a smaller amount and your first is well below current terms, keeping it and borrowing separately often preserves more value. Your numbers decide, not the rule.
Where the General Rule Breaks
The 80% figure is a conventional starting point. Several situations move it.
- Unit count. Two- to four-unit principal residences cap at 75% for cash-out. Second homes and investment property also sit at 75%. Occupancy decides the leverage.
- Seasoning on the old loan. The first mortgage being paid off must be at least 12 months old, counted from note date to note date. A borrower also needs to have been on title for 6 months. Delayed financing, inheritance, and legal-award exceptions exist. Freddie Mac’s cash-out section spells out the title requirement and its exceptions, along with the rule that every borrower must occupy a primary residence.
- Title held in an LLC. Fannie Mae requires ownership to be moved into the individual borrower’s name before this kind of refinance.
- The higher-leverage wholesale lane. One wholesale lane reaches 89.99% LTV with no mortgage insurance. It requires a 680 score, a 50% ratio ceiling, a thirty-year fixed rate, a primary residence, a conforming balance, and its own six months of seasoning. Subject to lender guidelines and full file review, it is a real option for some borrowers. In Texas, a cash-out on the homestead is capped by the state constitution at the agency figure, so this lane is not written there.
- Government loans. FHA cash-out sits at a lower ceiling than FHA rate-and-term. VA cash-out reaches a higher ceiling than conventional or FHA. The FHA Streamline and the VA IRRRL are no-cash-out options for existing government loans. They are built to adjust the loan, not to release equity.
- Jumbo. Above the conforming limit, jumbo lanes take over, with their own score and leverage rules.
- Thin equity. If the ceiling barely clears your payoff, the cash after costs may be too small to matter.
What the Lender Checks Beyond Equity
Equity opens the door. These items decide whether the loan proceeds.
- Credit. The wholesale conventional programs start at a 620 decision score. The automated finding governs most files. A 50% total ratio ceiling applies to automated approvals, and manually underwritten loans run 36% or 45%.
- Income and assets. The lender verifies both, along with the payoff statement and title.
- Property and occupancy. An appraisal sets value. Occupancy and unit count set the ceiling.
- Credit events. Agency waiting periods apply after a bankruptcy, foreclosure, or short sale. They run four years from a chapter 7 discharge, seven from a foreclosure, and four from a short sale or deed-in-lieu. Shorter periods may apply with documented extenuating circumstances.
All of this is subject to lender guidelines and full file review. Nothing here is a commitment to lend.
The Risk Side
Cash out of the home is debt secured by the home. The CFPB’s research on cash-out refinances and non-mortgage debt notes that converting credit-card or other debt into mortgage debt can put the home at risk if payments become unsustainable. Many borrowers do this to pay off bills, and some relief is real. But the debt does not disappear. It moves to a lien on your house.
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
Loan-to-value (LTV): the new loan balance divided by the home’s appraised value.
Combined loan-to-value (CLTV): all liens on the home added together, divided by its value.
Limited cash-out (rate-and-term) refinance: a refinance that pays off your first, costs, and certain liens, with only incidental cash back.
Seasoning: the minimum time you must have held the loan or the title before refinancing.
Subordinate lien: a loan recorded behind your first mortgage, such as a second mortgage or home equity line.
Borrowable equity: the equity left after the program ceiling is applied and costs are covered.
Practical Steps Before You Decide
Gather these before you commit to either route.
- Your current first-mortgage payoff figure and its note date.
- An honest estimate of the appraisal, and a plan for a lower one.
- The Loan Estimate for the refinance, with costs itemized.
- A written quote for the second-lien route, showing its combined limit.
- Your own break-even months against how long you plan to stay.
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.
Frequently Asked Questions
Can I do a cash-out refinance and still keep my existing low-rate first mortgage?
No. A refinance pays off the old first and replaces it, so the old rate and term go away. To keep the first, you would borrow against equity with a second lien instead. That leaves the first untouched, though the new loan has its own terms and usually its own payment.
How much of my equity can I actually take out?
Less than all of it. On a conventional one-unit principal residence, the ceiling is 80% LTV, and 75% on two- to four-unit principal residences. Subtract your payoff and financed costs from that ceiling and the remainder is your cash. A higher-leverage wholesale lane reaches 89.99% for qualifying borrowers, subject to lender guidelines.
Does a second lien count against my leverage?
Yes. Under Fannie Mae’s rules, the lender must count any subordinate lien when calculating combined loan-to-value. A second lien does not hide from the leverage test, and it is why the combined number matters more than the first balance alone.
What if the appraisal comes in below what I expected?
The ceiling shrinks with the value while your balance stays the same, so the cash falls faster than the value does. A 10% shortfall can cut modest cash to almost nothing. Build in a cushion before counting on a number.
Will a cash-out refinance lower my monthly payment?
Rarely. Taking cash raises the balance, and a replacement loan resets the terms on all of it. A lower payment can happen when your old loan carried a higher cost than the new one. When you keep a low first, replacing it is the less likely path to a lower payment.
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.
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References
1. Fannie Mae Eligibility Matrix
2. CFPB, Using Your Home Equity guide
3. Fannie Mae Selling Guide B2-1.3-02, Limited Cash-Out Refinance Transactions
4. Fannie Mae Selling Guide B2-1.2-04, Subordinate Financing
5. Freddie Mac Guide §4301.5, Cash-Out Refinance Mortgages
6. CFPB: CFPB Cash Out Refinances and Paydown Behavior of Non Mortgage Debt Balances
This article is part of Lendmire’s Refinance series — every loan program’s qualification details, guidelines, and scenarios live on the loan options page.
Related reading: How Much Each Cash-Out Refinance Leaves When You Are Scaling · How to Decide a Cash-Out Refi on Payment Math Not Timing · Cash Out Now vs Wait When Scaling From Two to Ten Doors
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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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.