The Quick Read: Lenders underwrite this loan on two separate tracks: your deposits decide whether you qualify, and the appraisal of the whole property, accessory unit included, decides how much equity you can pull out. The unit mostly matters on the property track, and its rent counts toward income only where a specific program allows it.
- Income comes from 12 months of personal or business bank statements, averaged after non-income deposits are removed.
- Business deposits are reduced by an expense factor before they count as income, and that factor varies by lender.
- The appraiser values the whole property. There is no separate accessory unit appraisal.
- A permitted, legal unit is far easier to work with than an unpermitted one.
- On an owner-occupied home, cash-out tops out at 80% LTV on a primary residence and 75% on a second home, subject to lender guidelines.
What Is a Bank Statement Cash-Out Refinance With an ADU?
It is a refinance that replaces your existing mortgage with a larger one and hands you the difference in cash. The loan is reviewed around documented income under the applicable program, subject to lender guidelines. Instead of tax returns, the lender reads your bank statements.
This lane suits self-employed owners whose tax returns show heavy write-offs. A conventional underwriter sees the reduced taxable income and shrinks what you can borrow. Deposit-based underwriting looks at cash flow instead. The accessory dwelling unit (ADU) is a second, smaller residence on the lot, such as a backyard cottage, garage conversion, or basement apartment.
Two things get confused constantly. The first is whether the ADU adds value to the collateral. The second is whether its rent counts as income. They are different questions with different answers, and the rest of this piece keeps them apart.
Key Terms Defined
Bank statement loan: a mortgage that qualifies the borrower on average deposits over a set window rather than on tax returns.
Expense factor: the percentage of business deposits treated as operating costs and removed before income is counted.
ADU: an accessory dwelling unit, a self-contained second living space on the same lot as the main home.
Cash-out refinance: a new, larger mortgage that pays off the old one and releases the equity difference as cash.
LTV: loan-to-value, the loan balance as a percentage of the appraised value.
Rent schedule: an appraiser’s opinion of market rent for a unit, attached to the appraisal report.
The Two Tracks: Income and Property
Every file is split into two reviews that run side by side. Mixing them is where most borrower confusion starts.
| Track | What it examines | Where the ADU shows up |
|---|---|---|
| Income | Deposits, exclusions, expense factor, debt-to-income | Only if the program allows its rent |
| Property | Appraised value, condition, legality, occupancy | Value of the whole property |
Income answers “can this borrower repay?” Property answers “how much is the collateral worth, and what is it?” The ADU lives mostly on the second track.
That is also why an ADU does not rescue a thin income file. A strong appraisal raises the available equity, but you still have to clear the income test on your own deposits.
The Underwriting Sequence, Step by Step
Across the wholesale network Lendmire works with, the sequence is consistent even though the details change by lender.
1. Choose the account type. Twelve months of business statements or personal statements, not a blend of both for the same income stream.
2. Strip non-income deposits. Transfers between your own accounts, loan proceeds, refunds, and one-time windfalls come out.
3. Average what remains. The underwriter totals the qualifying deposits across the window and divides by the number of months. Underwriters also watch the trend, since a declining pattern draws questions.
4. Apply the expense factor. On business accounts, deposits are gross revenue. A fixed expense ratio comes off, or an accountant-prepared ratio is used instead. Personal statements are usually treated differently from business ones.
5. Run the debt-to-income test. The resulting monthly income is compared against the new housing payment and your other debts.
6. Order the appraisal. The property is valued as a whole, with the ADU considered in that value.
7. Check LTV, credit, and reserves. Reserves commonly run around six months of the housing payment.
Ability to repay is not optional on a consumer loan. The CFPB’s ability-to-repay compliance guide explains that a creditor must make a reasonable, good-faith determination that the borrower can repay. Bank statement underwriting is how non-QM programs meet that standard for borrowers whose returns understate cash flow. It is a full analysis, not a shortcut.
Does the ADU’s Rent Count as Income?
Usually not directly, and never automatically. On an owner-occupied bank statement file, qualifying income comes from your deposits. ADU rent counts only if the specific program allows it, and it must not be counted twice.
Double counting is the trap. If tenant rent already lands in the account you are using to qualify, it is part of your deposit average. Adding it again as separate rental income would inflate the file, so underwriters will not allow it. Some lenders want rent deposited into a different account and documented with a lease. Others ignore ADU rent entirely and qualify the file on deposits alone.
Here is how rent scenarios generally sort. Treatment is lender-dependent, so treat this as a general guide.
| Scenario | Likely treatment |
|---|---|
| Documented lease, separate deposit trail | May be considered if the program allows |
| Rent mixed into the qualifying account | Part of the deposit average, not added again |
| Projected rent, no tenant | Typically not counted as income |
| Unpermitted unit | Value and rent may both be excluded |
The agency world is stricter, which is why it makes a useful contrast and nothing more. Fannie Mae’s Selling Guide allows ADU rent on a one-unit property but limits how much of qualifying income it can supply. Those are conforming-loan rules. Non-QM programs write their own, and they do not govern bank statement loans.
How the Appraiser Treats the ADU
The appraiser values the entire property in one report. The ADU is part of that analysis, and the appraiser may attach a rent schedule specific to the unit. The agency appraisal forms give a useful vocabulary: Form 1007 covers a single-family comparable rent schedule and Form 1025 covers a small residential income property, per the Fannie Mae guide linked above.
Three things drive how much the unit helps.
Legality and permits. A permitted unit with a clean legal-use record is treated as part of the property. An unpermitted unit may be excluded from value or flagged, and it can complicate the whole file. Permits are the single most useful preparation step.
Comparable sales. The appraiser needs comps with similar accessory units. Where few exist, the unit may be credited conservatively. An improvement may support a higher appraised value, depending on comps and underwriter review. It does not add value at its build cost by default, so a cash-out sized on appraised value can come in below what an owner expects.
Classification. Most files still read as a one-unit home with an accessory unit rather than a multi-unit property. How a given lender classifies it can affect which program and leverage tier applies, so ask early.
If you hold more than one accessory unit, expect lenders to credit one at most in the analysis.
Leverage Ceilings: Know Which One Applies
Cash-out leverage is lower than the purchase figures people see advertised. Mixing them up is the most common planning error.
| Property and transaction | Typical ceiling |
|---|---|
| Primary residence, cash-out, fixed expense ratio | Up to 80% LTV |
| Primary residence, cash-out, accountant-prepared ratio | Up to 75% LTV |
| Second home, cash-out | Up to 75% LTV |
| Investment property, cash-out | Around 75% LTV |
| Primary residence, purchase or rate-term | Up to 90% LTV |
Those are typical ranges from select lenders in Lendmire’s network, driven by loan size and credit, and they are not commitments. The accountant-prepared route carries the lower ceiling, which surprises people who assume more paperwork earns more leverage. Loan sizes generally run from about $125,000 to $3,500,000.
For a primary residence, an alternative exists: asset-depletion qualification, which uses liquid assets rather than deposits, runs up to about 80% LTV on a primary residence for borrowers whose statements are uneven. Leverage, reserves, and pricing vary by lender and program; the final terms follow the full file review.
A Worked Example, Without the Dollars
Consider a self-employed designer with a primary residence and a detached garage unit. The business account shows twelve months of deposits. The underwriter removes a transfer from savings and a one-time client refund, averages the rest, and applies the lender’s expense factor. What remains becomes qualifying income.
That income is tested against the new housing payment and existing debts. Suppose the ratio clears the lender’s limit with some cushion. The appraisal then values the home plus the unit. Say the unit is permitted and comps support it. The cash-out is sized from the appraised value at the program’s LTV ceiling, less the existing payoff.
Now change one fact. The tenant pays rent into the same business account. The rent is already inside the deposit average, so it helped the income number once and cannot help again. If the unit were unpermitted, the value credit could shrink, and the cash available would shrink with it.
Account and Deposit Pitfalls
Most denials and re-scopes here come from the statements, not the ADU.
- Rent in the qualifying account. Move rent to a separate account well before applying, and keep a lease on file.
- Mixed personal and business deposits. Business receipts landing in a personal account muddy the picture. Underwriters will want them explained.
- Overdrafts and returned items. Repeated ones signal cash-flow stress and draw scrutiny.
- A falling trend. If recent months run below earlier ones, a lender may average more conservatively.
- Large unexplained deposits. Expect a source letter or documentation.
Statement hygiene takes months, not days. Clean accounts before the twelve-month window you want reviewed.
Documents to Gather
- Twelve months of business or personal statements, all pages
- Evidence of business ownership, such as a license or registration
- Permit records and certificate of occupancy for the ADU
- A lease and separate rent deposit history, if rent is documented
- Current mortgage statement, insurance, and tax bills
- Identification and asset statements for reserves
Occupancy Decides the Disclosure Rules
Occupancy changes which rules apply. An owner-occupied file, meaning a primary residence or second home, is a consumer mortgage, so consumer disclosure rules apply. A bank statement loan on a non-owner-occupied rental, including a short-term rental, is business-purpose and exempt from those rules. Know which one your property is before you compare offers, and never assume the two follow the same process. 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.
Alternatives and Fallbacks
Bank statement underwriting is not always the right lane. If the property is a pure rental and the numbers rest on rent, a DSCR structure may fit better. That structure does not suit an owner-occupied home, where deposits carry the file.
If you plan to refinance in order to build a unit rather than refinance an existing one, the questions change. Projected rent is not existing rent, and lenders treat the two very differently.
A home equity line is another option for some owners. It trades a lower upfront ask for a variable structure and a lender who may still want tax returns. The right choice depends on documentation, leverage need, and how long you hold the property. For the full picture of how these programs fit together, see the complete DSCR loans guide.
Because Lendmire is a broker rather than a lender, the work is matching your scenario to a program. Different lenders in the wholesale network set different expense factors, ADU treatment, and overlays, and the best fit for your situation depends on your deposits, property, credit, and leverage. Qualification is subject to lender guidelines, credit approval, and property review.
Frequently Asked Questions
Can I use ADU rent to qualify on a bank statement loan?
Only where a program allows it, and typically only with a lease and a separate deposit trail. Many files qualify on deposits alone and treat the unit as collateral value, not income. If rent already flows through the qualifying account, it is part of the deposit average and cannot be counted again.
Does an unpermitted ADU hurt my cash-out?
Yes, it can. An unpermitted unit may be excluded from value, and its rent may not be counted. The practical fix is to permit it before applying, or to have the file sized as if the unit contributes nothing.
Why do business and personal statements get treated differently?
Business deposits are gross revenue, so an expense factor comes off before income counts. Personal deposits are treated differently by program. Lenders generally want you to pick one account type per income stream rather than blending them.
What is the maximum cash-out leverage on an owner-occupied home?
Up to 80% LTV on a primary residence with a fixed expense ratio, and 75% with an accountant-prepared ratio. A second home goes up to 75% LTV. The 90% figure applies to purchase and rate-term on a primary residence, not cash-out. Terms vary by lender guidelines, property type, leverage, credit profile, and full file review.
Is a bank statement loan easier than a conventional loan?
It is different, not easier. Every file still gets a full ability-to-repay analysis. It suits borrowers whose deposits tell a stronger story than their tax returns.
If you are self-employed and want to see how the numbers work, Lendmire can help you compare bank statement loan options based on your deposits, the property, credit profile, leverage, and your goals. Reach the team at 828-256-2183 or request a quote.
Investors weighing their equity options can start with Lendmire’s guide to cash-out refinance on an investment property.
About Lendmire
Lendmire is a mortgage brokerage (NMLS# 2371349) licensed for consumer mortgage lending in 16 states, arranging bank statement and other alternative-documentation mortgages — P&L-only, 1099-only and asset-based paths — through a wholesale lending network. Eligibility is determined by the lender on each file. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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References
1. CFPB ATR/QM Small Entity Compliance Guide
2. Fannie Mae Selling Guide B3-3.8-02
This article is part of Lendmire’s bank statement loan program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: Does a Bank Statement Cash-Out Refinance Make Sense to Invest in the Stock Market? · How Lenders Underwrite a Bank Statement Cash-Out Refinance With a 50% Expense Ratio · Can You Get Approved for a Bank Statement Cash-Out Refinance When the Appraisal Is Low?
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
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Legal disclosures. Lendmire (NMLS# 2371349) is a state-licensed mortgage brokerage that arranges financing through wholesale lender relationships. Lendmire is not a direct lender, depository institution, or registered financial advisor. The discussion above is general informational content about real estate financing — it is not financial, legal, or tax advice, and readers should consult licensed professionals for guidance on their individual circumstances. Loan inquiries are subject to lender underwriting; this article does not represent a commitment to lend. Loan terms, rates, and qualification standards vary by borrower, property, and state, and are subject to change at any time. Equal Housing Opportunity. NMLS Consumer Access: nmlsconsumeraccess.org.