The Quick Read: The cash is the smaller of two loan sizes, minus your existing payoff and closing costs. One size comes from the as-is appraised value times the cash-out cap, which is up to 70% LTV on short-term-rental collateral. The other comes from how much debt the rent can carry at the coverage floor. The addition itself usually does not raise the loan, because the appraisal reflects the property as it stands before the build.
- Value limit: as-is appraised value times up to 70% LTV on an STR cash-out (about 75% on a standard long-term rental).
- Income limit: the larger payment must still clear the coverage floor, which is 1.00 on an STR refinance, subject to lender guidelines.
- Net cash: new loan, less the old payoff, less closing costs, less any reserves you must hold.
- STR files typically expect a 640+ score and about 12 months of hosting history.
- An unbuilt addition generally adds no appraised value to this refinance.
Equity looks like a bank account until you try to withdraw from it. Two tests sit between your equity and your contractor, and the lower result sets the number. This article walks through both, then shows how to plan an addition around them.
DSCR Cash-Out Calculator
Run the cash-out numbers in your market
Rate source: Freddie Mac 30-yr average via FRED® — Federal Reserve Bank of St. Louis · effective Nov 5, 2026
Prefilled with starting assumptions — enter your property’s value, balance, taxes, and insurance for a more accurate picture.
Program parameters update from Lendmire’s centralized guideline source. Taxes and insurance are editable estimates.
As of Nov 5, 2026 · General Freddie Mac market benchmark, not a Lendmire loan offer. Property value, balance, taxes, and insurance are editable estimates. Maximum loan-to-value varies by lender, program, property type, and seasoning. Not a Loan Estimate, approval, or commitment to lend. Program availability and eligibility are subject to lender guidelines, credit approval, property review, and underwriting.
What Sets the Cash Amount?
The loan is capped by the lower of the value test and the coverage test. Net cash is whatever remains after the old mortgage is paid off and costs come out. Across the wholesale network, a short-term-rental cash-out typically tops out at 70% LTV, a notch under the roughly 75% available on a standard long-term rental.
Here is the formula in plain steps:
1. Take the as-is appraised value.
2. Multiply by the cash-out cap (up to 70% for STR collateral).
3. Compare that result with the loan the rent can support at the coverage floor. Use the smaller one.
4. Subtract the existing mortgage payoff.
5. Subtract closing costs and any required reserves.
What is left is the money for your project. Most programs in the network expect about 6 months of ownership before a cash-out, counted from title recording. Programs that offer delayed financing for recent cash buyers can waive the seasoning clock, but not the value test. Terms vary by lender and every file is underwritten individually.
Treat closing costs as a real deduction and ask for the actual figures on your file.
How Does the Value Limit Work in Practice?
The value limit is simple: as-is value times the cap. Picture a property that appraises at $600,000 as it stands. At a 70% STR cash-out cap, the largest new loan would be $420,000. If the existing mortgage payoff and costs total less than that, the difference is your cash. If you owe most of it already, there is little to release.
That example is modeled, not a market figure. The point is the shape of the math. Every dollar of value you assume in your head but the appraiser does not recognize reduces the loan.
A thin-equity property shows the other side. An investor who owes close to the cap has almost nothing to pull, no matter how strong the booking calendar looks. In that case, the better move may be to wait, pay down, or fund the build another way.
Will the Addition Raise the Loan?
Usually not, if the refinance closes before construction. The appraiser values what exists on the day of the visit. Your plans, drawings, and contractor bids may inform a conversation, but they do not stand in for a finished, permitted structure.
This is the central trap. Investors often size their loan on an after-completion value they hope for, then find the file sized on today’s value. The cash pays for the build, but the build has not yet added appraised value.
Even after completion, cost does not equal value. Remodeling’s Cost vs. Value data, as summarized by Rate.com, shows large additions recouping only a fraction of their cost at resale. Those are national resale figures, not DSCR appraisal results, so treat them as directional. An addition may support a higher appraised value, depending on comps and underwriter review. A detached unit such as an ADU can be especially hard to value where comparable sales are thin.
An STR investor may still justify the build on revenue alone. Just do not assume the appraisal will follow the invoice.
How Does the Coverage Test Limit the Cash?
Coverage is the second gate. DSCR compares the property’s rent used for lender review to its full monthly housing payment: principal, interest, taxes, insurance, and any HOA dues. On an STR refinance, many select programs in the network start at a 1.00 floor, and stronger ratios open better pricing and leverage.
Cash-out makes the balance bigger, so the payment grows and coverage thins. A file that clears the value test can still fail here, especially when the ratio lands just under the 1.00 minimum on a higher-leverage cash-out. That is why taking the ceiling is rarely the smart play.
Clearing 1.00 also does not mean positive cash flow. The calculation covers rent against the payment only. Repairs, vacancy, management, utilities, and capex all sit outside it, and a new addition adds to several of those.
A separate select-lender path takes coverage below 1.00, with leverage and terms adjusted. Select lenders in the network offer it, but a sub-1.00 file on a larger cash-out balance usually means less leverage, so it rarely maximizes proceeds.
How Do Lenders Document STR Income?
For an existing STR refinance, the strongest evidence is actual history. Expect about 12 months of hosting experience, typically shown through platform payout statements, often matched to bank deposits. Without history, some files lean on projections or a long-term-rent fallback, but a refinance is built around what the property has actually earned.
Appraisal forms matter here. Form 1007 documents long-term monthly rent. The form is not designed for short-term-rental income, so multiplying a nightly rate by 30 days is not a valid shortcut. Class Valuation says STR income belongs in a labeled narrative addendum instead. The forms are named here only for identification; they do not govern how DSCR programs set terms.
New rooms or beds do not create history. Expect the lender to wait for the added capacity to operate, or to rely on the existing 12-month record.
What Is the Net Cash on a Few Different Files?
The table below frames three modeled files in ratios and percentages only. The first column names the situation; the last shows which test likely binds.
| Scenario | Equity position | Value test | Coverage test | Likely binding limit |
|---|---|---|---|---|
| Strong equity, strong rent | Low balance owed | Plenty of room at 70% | Clears 1.2x or better | Whichever is lower; often value |
| Strong equity, thin rent | Low balance owed | Plenty of room | Near 1.00 at larger balance | Coverage |
| Modest equity, strong rent | Balance near the cap | Little room | Comfortable | Value |
In the second, a bigger loan drags coverage toward the floor, so the usable cash is smaller than equity suggests. In the third, rent is no problem but the value test leaves little to release.
Whichever file looks like yours, test the as-is value limit first, then the coverage limit. An investor planning a six-figure build should run both before signing a contractor agreement.
The lender’s calculator can model illustrative scenarios, and it is an estimate, not a quote.
Cash-Out Before the Build, or After?
Both sequences work, and each trades one risk for another.
Refinance first, build second. You get proceeds on as-is value and fund construction from them. This needs strong existing equity and coverage. It also means you carry the larger balance during construction, before the new space earns anything.
Build first, refinance on completed value. If the addition is finished, permitted, and appraised, the value is higher and so is the potential loan. But you must fund the build another way first: cash, a construction loan, or a bridge loan. Bridge or hard-money exits often serve as a stepping stone into a DSCR refinance, which adds a second financing step and its own costs.
The better answer depends on your liquidity. If you hold cash for the build, building first can mean a larger and cleaner refinance. If you do not, refinancing first may be a practical path when conventional options are a poor fit, and sizing it conservatively matters more.
Why Do Permits and Design Change the Number?
Permit status can decide whether the new space counts at all. Appraisal-practice sources, including Measure Floor Plan, note that unpermitted finished space often cannot be counted as living area and may be excluded or require legalization. Keep the permit file ready for the appraiser.
Design counts too. An addition that is above-grade, finished, heated, and connected generally counts as living area. A finished basement is reported separately as below-grade space. A detached guest house or ADU is valued as a separate improvement, using market-derived adjustments rather than square footage alone.
Property type is another gate. Manufactured homes (single- and double-wide), log homes, and barndominiums are not offered in the network’s DSCR programs, so an addition project on one of those properties will not fit this refinance.
How Does This Compare With Other Ways to Fund an Addition?
| Option | Sized on | Best fit | Main tradeoff |
|---|---|---|---|
| STR cash-out refinance | As-is value, up to 70% LTV, plus coverage | Strong equity, rent history in place | Larger balance, thinner coverage |
| Build first, then refinance | Completed value | Investor with cash or bridge funding | Needs build capital up front |
| Construction or bridge loan | Project cost or after-repair value | Large or phased builds | Separate loan, then a refinance exit |
| Rate-and-term refinance | Existing balance only | Restructuring, no new cash | No added capital for the build |
Cash-out is the simplest structure when equity is already strong. For larger builds with thin equity, a construction or bridge step ahead of a DSCR refinance often fits better. For the broader mechanics, the complete DSCR loans guide covers how coverage, leverage, and credit work together.
Across the wholesale network, a few more parameters shape the decision. Most programs want a score around 660, and STR files typically start at 640. Reserves vary by lender, leverage, loan size, and transaction type, and are commonly around 6 months of PITIA. Loan sizes run up to $3,000,000 on standard programs, with balances below the standard-program minimum routed through select lenders, and balances above $2,500,000 generally hold to 30-year fixed structures. Extended terms and interest-only periods are available through select lenders, with terms adjusted. All of this is subject to lender guidelines, and every file is reviewed individually.
When Does This Not Work?
Skip the cash-out, or shrink it, in these situations:
- Coverage is already thin. A bigger balance may push the file under the floor.
- Income is seasonal and the history is short. Twelve months of uneven payouts can pull rent used for lender review down.
- Equity is mostly in the plan, not the property. If the case depends on post-build value, the as-is appraisal will not support it.
- The space is unpermitted or zoning is uncertain. The income and the value can both fail to count.
- The addition earns little. A bedroom that raises nightly rate only slightly may not justify a larger payment.
A sound approach treats the refinance as a tool, not a goal, sizing it around the project’s real cost with room to spare on coverage. The strongest files clear both tests: enough equity and enough rental coverage.
Cash-out proceeds are loan proceeds, not income, as Credit Karma explains for investment properties. Tax treatment varies; consult a qualified professional.
Key Terms Defined
As-is value: What the appraiser says the property is worth today, before any planned work.
Cash-out refinance: A new, larger loan that pays off the old one and releases the difference as cash.
DSCR: Rent used for lender review divided by the full monthly payment, including taxes, insurance, and HOA dues.
Seasoning: The ownership period a lender expects before it will cash out equity, about 6 months on most files.
Net proceeds: The cash left after the old payoff, closing costs, and required reserves.
Frequently Asked Questions
Can a short-term rental cash-out refinance fund a new bedroom or ADU?
Yes, the proceeds can go toward the build, but the loan is sized on the property’s current value, not the finished one. The new space typically does not raise this loan. Plan the budget around the as-is value limit and the coverage limit, whichever is lower.
Will the new bedrooms count toward my rental income?
Not right away. New capacity has no booking history, so lenders typically rely on the existing 12-month record or wait for operating history. Some files fall back to long-term rent when history is thin. Subject to lender guidelines.
Can an LLC hold the property?
Often, yes. Loans to LLC-titled borrowers are typically available through select lenders, depending on program guidelines. Entity documents and a personal guarantee are commonly part of the file.
How is this different from a rate-and-term refinance?
A cash-out refinance replaces your first mortgage with a larger one and releases the difference. A rate-and-term refinance changes the loan’s terms without adding cash. Each is sized on property value and, for DSCR files, rent coverage.
What if my coverage drops below 1.00 after the cash-out?
A separate select-lender path takes coverage below 1.00, with leverage and terms adjusted, so the usable loan is typically smaller. Many standard programs start at 1.00. Test coverage at the new balance before you commit to the amount.
If you are buying or refinancing a rental property and want to see how the numbers work, Lendmire can help you compare DSCR loan options based on the property income, credit profile, leverage, and investor goals. Lendmire is a broker arranging DSCR investor loans through select lenders in its wholesale network across 41 markets, including Washington, D.C. Nothing here is a commitment to lend.
For how equity extraction works on an investment property, see Lendmire’s guide to cash-out refinance on an investment property.
About Lendmire
A non-QM mortgage broker (NMLS# 2371349), Lendmire arranges DSCR financing for real estate investors in 41 markets — 40 states plus Washington, D.C. Because deals are underwritten primarily on property cash flow rather than personal income documentation, the structure suits self-employed buyers and entity-owned portfolios. Lendmire places loans through wholesale investor lenders; it is not a direct lender. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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References
1. Rate.com: ROI of renovation projects
3. Measure Floor Plan: unpermitted square footage and appraisals
4. Credit Karma: cash-out refinance on an investment property
This article is part of Lendmire’s investment property cash-out refinance program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: How to Do a Cash-Out Refinance on a Rental as an Investor · How Much Cash Comes Out of a Short-Term Rental Cash-Out Refinance Right After Rehab? · Banks That Offer a Short-Term Rental Cash-Out Refinance to Consolidate Debt
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.