The Quick Read: The right loan is the smaller of two numbers: what the one use actually requires, and what the home and your file allow. A cash-out refinance replaces your whole first mortgage, so every extra dollar you take is borrowed at the new terms, and so is the balance you already had. Size the draw to the job, test it against the lender’s cap, and then ask whether the new loan beats keeping the old one.
What Does “Sizing for One Use” Mean?
Sizing means building the loan from the purpose, not from the ceiling. Most online tools start with the maximum cash you can pull. That answers a lender’s question. Your question is different: how much does this one job cost, and what does it do to the mortgage you already like?
Two numbers matter.
- Need: the full cost of the one use, plus a cushion.
- Capacity: what the lender will allow against the appraised value, after the old loan is paid off and the loan costs are covered.
The loan is the lesser of the two. Lenders don’t size to your purpose. They size to value, credit and ratios. Once the loan closes, the lender does not police what you do with the proceeds on a standard consumer cash-out, so the discipline has to come from you.
How Is a Cash-Out Refinance Different From a Rate-and-Term Refinance?
A conventional cash-out refinance pays off your existing first mortgage with a new, larger one and hands you the difference. That is the definition in the Fannie Mae Selling Guide: a new first mortgage that pays off existing mortgages on the same property.
Across the wholesale programs Lendmire places files with, a rate-and-term refinance pays off the first mortgage, the closing costs and any purchase-money second, with only incidental cash back. A rate-and-term refinance reaches 95% LTV on a one-unit principal residence. A conventional cash-out tops out at 80% LTV on a one-unit principal residence and 75% on two- to four-unit homes, second homes and investment property. Final terms depend on lender guidelines, property type, leverage, and the borrower’s complete credit picture.
That gap is the whole sizing story. Cross the incidental-cash line and the file is reclassified. The leverage cap drops, and pricing tightens. The exact size of “incidental” has changed over time, so confirm the current figure in the Fannie Mae Selling Guide before you plan around a small draw. Think of it as a small, capped amount.
Key Terms Defined
Need: the all-in cost of your single use, including a cushion but excluding financed closing costs.
Capacity: the most the lender will allow, found by applying the LTV cap to the appraised value.
Payoff: the balance of the existing first mortgage, plus any lien the new loan must clear.
Gross cash: the new loan amount minus the payoff, before closing costs.
Net cash: gross cash minus the costs paid from proceeds. This is what lands in your account.
Blended rate: the combined cost of your old loan and any new money, weighted by balance. It is how you compare a refinance to a second lien.
Step 1: Build the Need Number From the Use
Start with one use. Write it down. The use decides how much padding the number needs.
| Use | What goes in the number | What makes it uncertain |
|---|---|---|
| Home repair or remodel | Contractor bid, permits, design | Change orders, hidden damage |
| Defined debt payoff | Payoff letters, per-diem interest | Balances shift before closing |
| Co-owner buyout | Agreed buyout price | Appraisal-based price changes |
| Cash reserve | Months of expenses | Your own estimate |
A fixed bid or a payoff letter needs a small cushion. A project with unknowns needs more. A reserve is the easiest to oversize, because there is no invoice to stop you.
Then account for the costs of the loan separately from the need number. Closing costs can often be financed into the new balance, which raises the loan and lowers the net cash you receive. Costs shift, they do not vanish. A “no-closing-cost” refinance builds them into the rate or the balance instead.
One note on the buyout. Freddie Mac treats a special-purpose cash-out refinance as one where the owner uses the proceeds to buy out a co-owner’s equity. It is a named case where the proceeds have a single permitted purpose.
Step 2: Test Capacity Against the Cap
The cap applies to the whole new loan, not to your equity. The Fannie Mae Eligibility Matrix sets 80% on a one-unit primary residence cash-out and 75% on two- to four-unit homes.
The test runs in four lines:
1. Appraised value times the cap gives the maximum new loan.
2. Subtract the payoff on the existing first mortgage.
3. Subtract financed closing costs.
4. What is left is the most net cash available.
Compare that last line to your need. Need here is the use plus its cushion. The loan costs already came out of capacity in line 3, so they are not counted again on the need side, and both sides are measured the same way. If need is lower, you have room, and you borrow only the need. If need is higher, the file fails the test as written.
Run it twice. Run it at the value you expect, then at a lower one. Appraisals come in light, and a draw that only works at the top of your range is a draw you can’t count on. Take the number from the lower run if the use can’t be cut.
Say a home appraises at a value where the 80% cap leaves a modest gap above the payoff. A small, fixed-bid repair fits easily. A project needing most of that gap leaves no cushion. Same house, different answer, because the need changed.
Other file items affect capacity too. Fannie Mae’s matrix notes that minimum reserves apply on cash-out files with a DTI above 45%. Across the wholesale programs, the automated finding governs most files, with a total ratio ceiling of 50%. Credit starts at a 620 decision score on the conventional lanes, and everything stays subject to lender guidelines and full file review.
When Is the Mortgage Worth Keeping?
Here is the part the maximum-cash pages skip. A cash-out refinance reprices the entire balance. The old rate and term go away. If your current loan is one you’d rather keep, the new money has to justify replacing all of it.
Ask three questions.
1. How big is the draw compared with the existing balance? A small draw on a large balance means you reprice a lot of debt to borrow a little. That is hard to justify.
2. What does the blended cost look like? Compare the cost of the new full-balance loan against your old loan plus a separate second lien for just the cash. Your loan officer can run both.
3. How long will you stay? Closing costs are recovered over time. A short stay may not pay them back.
If the draw is small against the balance, a second lien often keeps the first mortgage intact. If the draw is large, or the old loan is no longer a bargain, replacing it can make sense.
The risk side is real too. The CFPB notes that converting non-mortgage debt into mortgage debt can put the home at risk if payments become unsustainable, while defaulting on a card is unlikely to cost the home. It also notes that cash-out draws down wealth you might need later. Its survey data show paying off other debt is the most common stated use. Balances on paid-off cards can drift back, so a debt-payoff sizing should include a plan for the cards.
Step 3: Trim, Phase or Switch
When need exceeds capacity, you have four moves.
- Trim the use. Cut scope or take a smaller phase now.
- Phase the work. Do the part that must be done first and revisit later.
- Pay costs out of pocket. Keeping costs out of the loan leaves more room under the cap.
- Switch products. A second lien, or a different program, may fit better.
When capacity exceeds need, borrow the need. Taking the maximum “because it’s there” raises the balance, the payment and the interest on money you don’t have a job for. The extra dollars are not free. They sit inside a loan that reprices everything.
Where the General Rule Breaks
The 80% rule is a starting point. Several cases change the answer.
- Two- to four-unit homes. The cap drops to 75%, which leaves less cash on the same equity.
- Second homes and investment property. The same 75% applies. Occupancy decides leverage.
- Homes with no mortgage. A refinance on a free-and-clear property counts as cash-out, not a purchase.
- HELOC payoff. Freddie Mac’s cash-out rules treat refinancing a HELOC first lien as cash-out.
- Recent purchase. Across the wholesale programs, the first mortgage being paid off must be at least 12 months old, and a borrower must have been on title for six months. Delayed financing is an exception, described in the Fannie Mae guide. A borrower who bought within the past six months must meet those requirements.
- Listed for sale. The home must be off the market by the disbursement date.
- Delinquent property taxes. A cash-out that finances taxes more than 60 days delinquent is ineligible unless an escrow is set up, with a narrow exception where law prevents requiring one.
- Texas homesteads. The state constitution caps a homestead cash-out at the agency figure, and the wholesale 89.99% lane is not written there.
- Government loans. The FHA Streamline and VA IRRRL are rate-reduction tools, not cash tools. HUD’s archived guidance describes the Streamline as involving no cash back to the borrower. The VA says the IRRRL is a “VA to VA” loan on its home loans page. VA cash-out is a separate product, and the VA’s circular requires a net tangible benefit test on cash-out refinances.
One more lane worth knowing. Across the wholesale network, one conforming lane reaches 89.99% LTV with no mortgage insurance on a thirty-year fixed primary residence. It needs a 680 score, a 50% ratio and its own six months of seasoning. It is the exception, not the planning default, and it is subject to lender guidelines.
Common Sizing Mistakes
- Treating 80% as a share of equity. It is a cap on the whole new loan.
- Forgetting that closing costs reduce net cash.
- Counting closing costs twice, once in need and once in capacity.
- Sizing at the best-case appraisal.
- Adding a “just in case” amount with no use attached.
- Assuming the old rate survives because only the cash is new. It doesn’t.
- Paying off cards without a plan to keep them at zero.
Sizing Worksheet
Pass or fail, in order:
1. One use, written down, with a cost and a cushion. Pass if you can state it in one sentence.
2. Need equals the use plus its cushion. Loan costs are handled in line 3, not here.
3. Capacity equals value times the cap, minus payoff, minus financed loan costs, run at expected and lower values.
4. Need at or below capacity at the lower value. Pass. Above it, trim, phase or switch.
5. Draw compared with the existing balance and blended cost against a second lien. Pass only if replacing the old loan beats keeping it.
Fail any line and the refinance isn’t sized yet.
Frequently Asked Questions
Do I have to use the money for what I said at application?
On a standard consumer cash-out, the lender generally does not restrict how proceeds are used after closing. The exceptions are special-purpose loans, such as Freddie Mac’s co-owner buyout, where proceeds are limited to the buyout. Sizing to one use is your discipline, not the lender’s rule.
Can I take less than the maximum?
Yes, and often you should. The cap is a ceiling. Borrowing only the need keeps the balance, and the payment on it, lower. A very small draw may even fall under the incidental cash limit and be treated as a rate-and-term refinance, with higher leverage allowed.
What happens if the appraisal comes in low?
The cap applies to the appraised value, so a lower value shrinks the maximum loan and the cash with it. Run your numbers at a lower value before you apply. If the use can’t be cut, you may need to trim the scope or look at another structure.
Are closing costs rolled into the loan or paid from proceeds?
Either way, you pay them. Rolled in, they raise the balance. Paid from proceeds, they reduce your net cash. A “no-cost” refinance builds them into the rate or the balance instead. Your Loan Estimate shows the cash to close, and the Closing Disclosure confirms it.
Is the cash taxed?
Tax treatment can depend on your situation; borrowers should speak with a qualified tax professional before relying on any deduction or credit.
Next Step
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. Start with Lendmire’s cash-out refinance programs, and treat every figure here as subject to lender guidelines and full file review. Nothing here is a commitment to lend.
For your own numbers, request a scenario review with Lendmire.
About Lendmire
As a mortgage broker (NMLS# 2371349), Lendmire helps homeowners and home buyers in 16 states with FHA, VA, conventional and jumbo purchase and refinance loans arranged through wholesale lenders. Lendmire is never the lender; program terms are set by the lender and the agency guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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References
1. Freddie Mac Guide Section 4301.6
2. Fannie Mae Eligibility Matrix
3. CFPB Office of Research, cash-out refinances and non-mortgage debt
4. Freddie Mac Guide Section 4301.5
5. Fannie Mae Selling Guide B2-1.3-03, delayed financing
6. HUD HOC Reference Guide, Refinances
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 a Cash-Out Refinance Blends Credit Card Debt Into Your Mortgage · Should You Max Out a Cash-Out Refinance on a Mortgage Worth Keeping? · How to Size a Cash-Out Refinance for a Renovation Using Contractor Bids
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.