The Quick Read: On a two- to four-unit home you plan to live in, the agency guides call for six months of reserves, a test a one-unit buyer does not face. A “month” is the property’s full housing payment, not rent or principal and interest alone. Reserves are what you still hold after closing, on top of your down payment and closing costs. Rent from the other units may help you qualify, but it does not shrink the reserve requirement. All of this is subject to lender guidelines and full file review.
Why Does a Duplex Need Reserves When a Single-Family Doesn’t?
Occupancy and unit count set the reserve tier. The same borrower, with the same assets and the same loan, can need no reserves on a one-unit home and six months on a duplex, triplex or fourplex.
Conventional payment estimate
The starting figures are an example price at the first-time buyer’s minimum down payment. Replace them with yours.
Editable benchmark: 7.32% as of October 22, 2026 · Freddie Mac 30-year average via FRED®. A conventional market reference, not a conventional loan quote.
Estimate seeded at the low end of Fannie Mae’s published range (0.58%–1.86% a year); the insurer prices the actual premium on the score and the leverage. Applies only above 80% loan-to-value.
Illustrative starting assumptions: a $350,000 price, the first-time buyer’s minimum down payment, a thirty-year term at the current Freddie Mac benchmark, mortgage insurance at the low end of Fannie Mae’s published range, and property taxes and insurance estimated at typical national rates. Every field is editable.
Illustrative estimate only — not a Loan Estimate, approval, quote, or commitment to lend. The rate field carries the weekly Freddie Mac thirty-year conventional benchmark, a market reference and not a conventional loan quote; your rate is set by the lender at lock. The mortgage insurance figure is an editable estimate seeded from Fannie Mae’s published typical range, not a premium quote; the insurer prices the actual premium, and the cancellation month assumes scheduled payments with no extra principal and no change in value. Taxes, insurance and dues are editable estimates; closing costs are not included. Conforming loan limits apply by county. Licensed in sixteen states for consumer mortgages.
Fannie Mae’s Selling Guide topic B3-4.1-01 lists six months of reserves for a two- to four-unit principal residence. The same page lists no minimum for a one-unit principal residence. The logic is risk: more units mean more moving parts, such as vacancies, repairs and a larger payment to carry if income slips.
Treat six months as a floor. The same page says additional reserves may be required based on the automated underwriting system’s overall risk assessment. A file with a thin credit history or high ratios can be asked for more.
Lendmire arranges these loans through wholesale lenders. Across the conventional loan programs we place files with, the pattern is consistent. The borrower who plans only for the down payment is the one who hits a surprise at the reserve step.
How Is the Reserve Number Calculated?
Reserves equal months multiplied by the property’s full housing payment. Freddie Mac’s Guide Section 5501.2 defines reserves as the borrower’s assets remaining after the mortgage closes. It also spells out what a “month” contains:
- Principal and interest
- Hazard insurance
- Real estate taxes
- When applicable: mortgage insurance, leasehold payments, HOA dues and secondary-financing payments
For the subject property, the principal and interest piece is based, at a minimum, on the note rate. Fannie Mae’s worked examples in its Selling Guide use the same full-payment idea, often called PITIA (principal, interest, taxes, insurance and association dues).
Here is the sequence the underwriter follows:
1. Set the tier. Owner-occupied, two to four units: six months on the subject property.
2. Build the monthly payment. Add every component above for the whole building, not just your share as owner.
3. Multiply. Payment times the required months gives the post-closing balance you need.
4. Add the cash to close. Down payment plus closing costs must be covered first.
5. Verify what remains. Statements show what is left after those costs, and only eligible, verified assets count.
Note that the building’s full payment applies. On a fourplex, you carry the payment for four units even though you occupy one. This is why a buyer who is reviewed on down payment alone can still fall short.
A quick illustration in percentages and plain words: a buyer putting 5% down on a fourplex must have that 5%, the closing costs, and then six months of the building’s full payment still sitting in eligible accounts. Three piles of cash, not one. Terms depend on the lender’s guidelines, the property type, the leverage, and a full review of the credit profile.
What Counts as Reserves, and What Doesn’t?
Verified, accessible assets count; borrowed money, non-vested funds and a gift of equity do not. The lender confirms how much of each asset is usable.
| Asset | How it is treated |
|---|---|
| Checking and savings | Counts when verified by statements |
| Stocks, bonds, mutual funds | Counts; liquidation not required |
| Vested 401(k), IRA and similar | Counts when vested and accessible |
| Non-vested stock options | Does not count |
| Gift funds | Counts, subject to the minimum contribution |
| Gift of equity | Does not count |
Fannie Mae’s stock, bond and mutual fund guidance allows 100% of the verified value for reserves, with no liquidation required. Non-vested options are not eligible.
Retirement money gets more questions. Fannie Mae’s selling FAQs say vested IRA, SEP, Keogh and 401(k) funds are acceptable for the down payment, closing costs and reserves. The lender must verify ownership and confirm the account is vested and allows withdrawals regardless of current employment status. If your plan can’t be tapped while you still work there, those funds fail the test. Funds used for reserves do not need to be withdrawn.
One common myth: that retirement balances are always cut to 60%. Fannie Mae’s 2015 announcement allowed 100% of the value of the asset when determining available reserves, and the current stock, bond and mutual fund rule matches it. The practical advice is simple: the lender confirms how much counts, so ask before you assume a haircut or a full credit.
Two timing traps. Moving money between accounts without a paper trail can make funds hard to document. An unsecured loan used to build a balance is not the same as savings. Keep statements clean and leave the money where it is.
Can Gift Funds Cover Reserves?
Yes, with a limit on a multi-unit. Fannie Mae’s gift guidance says gifts may fund all or part of the down payment, closing costs or financial reserves, subject to the minimum borrower contribution.
On a two- to four-unit principal residence above 80% LTV, the borrower must first put in a 5% minimum from their own funds. After that, gifts can supplement the down payment, closing costs and reserves. At 80% LTV or less, all funds can come from a gift. The exact numbers vary by lender and program and follow a full review of property, leverage, and credit.
The sharp edge: a gift of equity may not be used for reserves. A relative who sells you the building below market value can help with the down payment and closing costs. It will not make your post-closing balance. A buyer who expected otherwise finds the file short late in the process.
Does Rent From the Other Units Help?
Rent and reserves answer two different questions. The income test (the ratio test) compares your income, including any eligible rent, against your debts. The reserve test measures the assets you hold after closing. No rule nets one against the other, so don’t plan on it.
On the income side, the agencies differ:
- Freddie Mac’s rental income guidance treats income from units you don’t occupy in a subject two- to four-unit as eligible. On a purchase, the lender uses 75% of gross monthly rent from the lease, or market rent from the appraisal form if no lease exists. The 25% adjustment covers vacancy and upkeep.
- Fannie Mae generally does not allow rent from the unit you occupy. Fannie Mae also moved its rental income rules into a new section, B3-3.8, as part of its income assessment update. Lenders may apply the changes immediately but must adopt them by the stated deadline, so details are in transition.
Even when you don’t use rent to qualify, eligible rents on the subject property are generally reported in the loan delivery data for a two- to four-unit principal residence. Expect a lease or an appraiser’s market rent to show up in the file either way.
The appraisal is its own product. A two- to four-unit needs the small residential income property report: Fannie Mae Form 1025 or Freddie Mac Form 72. It is typically slower and costlier than a one-unit appraisal. Plan for a full appraisal rather than assuming a waiver.
Where the General Rule Breaks
Six months is the baseline for a house hacker, but several situations move it. Here are the named edge cases.
Automated versus manual underwriting. The flat six months sits next to the system’s right to ask for more. Freddie Mac states six months explicitly for manually underwritten two- to four-unit primary residences. Manual loans use the Fannie Mae Eligibility Matrix, which is where manual reserve months are published. Check it for your file instead of working from a secondhand summary.
Program differences. Some agency programs set their own reserve terms. Freddie Mac’s Home Possible fact sheet says reserves are determined by its automated system, with a lower figure for manual loans. HomeReady has its own rules too. In our program set, HomeReady and Home Possible carry an income limit of 80% of area median income. Confirm which rule governs your file before relying on a lower number.
The add-on tiers. Fannie Mae’s extra percentage-of-balance reserves for other financed properties apply when the subject is a second home or investment property. For an owner-occupied two- to four-unit, the six-month subject-property rule is the trigger. A buyer whose old home is now a rental should not assume extra add-ons here, but the lender makes that call.
An ADU on a one-unit home. An accessory dwelling unit on a single-family house is still a one-unit principal residence. It does not trigger the two- to four-unit tier. Fannie Mae’s ADU announcement limits that income to 30% of total qualifying income.
Occupancy changes the leverage. If you won’t live there, the property is an investment property with different rules, and leverage falls. Our program set allows 95% LTV on a two- to four-unit principal residence, versus 75% on a two- to four-unit investment property. Final terms depend on the lender’s guidelines, the property type, and the borrower’s complete credit picture.
Government loans. FHA and VA follow separate rules outside this piece. Lendmire’s piece How FHA Counts Reserves When a House Hacker Buys a 2-4 Unit walks through that side-by-side if reserves are your bottleneck.
The Envelope Around Reserves
Reserves are one gate among several. In the wholesale conventional programs we place with, a two- to four-unit purchase on a principal residence can reach 95% LTV (5% down). The 97% first-time-buyer option applies to a one-unit home, not a multi-unit. Each figure is subject to lender guidelines and a complete review of property type, leverage, and credit.
Mortgage insurance is required above 80% LTV. You can request cancellation at 80% of the original value with good payment history, no subordinate liens and no decline in value. The servicer must end it automatically at 78%. The premium belongs in the “month” if it applies, so a high-LTV purchase raises the reserve target slightly. Leverage, reserves, and pricing vary by lender and program; the final terms follow the full file review.
On credit and ratios, the wholesale programs start at a 620 decision score. The automated finding governs most files, with a total ratio ceiling of 50%. Manually underwritten loans run 36% or 45%, with reserve and score factors from the Eligibility Matrix. For borrowers with a recent credit event, waiting periods are agency rules: four years from a chapter 7 discharge, seven from a foreclosure, and four from a short sale or deed-in-lieu, shorter with documented extenuating circumstances. All figures are subject to lender guidelines and full file review, and nothing here is a commitment to lend.
If you’re thinking beyond closing, it also helps to read Lendmire’s piece PMI Appraisal vs Refinance for a House Hacker’s 2-4 Unit Conventional Loan.
If You’re Short on Reserves
Shortfalls are fixable if you find them before you write an offer. Practical options, roughly in order:
1. Lower the price. A smaller building means a smaller payment, which means fewer dollars needed per month of reserves.
2. Shift the split. A bigger down payment cuts the loan and the mortgage insurance but also drains reserves. The balance matters, so run both versions.
3. Document more assets. A vested retirement account or brokerage balance you hadn’t counted may qualify.
4. Use gifts properly. Remember the 5% own-funds minimum above 80% LTV, and that equity gifts don’t count. Every figure here varies by lender and program — guidelines, property type, leverage, and credit profile all apply.
5. Compare programs. A different agency program or a manual-versus-automated path may treat the file differently.
6. Wait. Another few months of saving is sometimes the cleanest answer. Terms vary by lender guidelines, property type, leverage, credit profile, and full file review.
A separate point: the lender’s minimum is not the same as a prudent buffer. A house hacker faces vacancy, repairs and a tenant who stops paying. Reserves meet the lender’s test; your operating cushion protects your plan.
Documents and Timing
Expect to provide:
- The latest statements for each reserve account
- Retirement plan vesting and withdrawal terms
- A gift letter for any gift funds
- A signed lease, if any, for the other units
- The two- to four-unit appraisal with rent schedule
Reserves are verified from statements, so balances should hold steady through closing. A large unexplained deposit or transfer invites questions. Funds that generally do not count include non-vested money, cash on hand that can’t be documented, and cash-out proceeds from the subject property. Confirm each item with your loan officer.
Key Terms Defined
Reserves: The assets you still hold after the mortgage closes, counted in months of the property’s housing payment.
PITIA: Principal, interest, taxes, insurance and association dues, the full monthly housing payment.
Automated underwriting finding: The system’s risk assessment of your file, which can set reserves above the guide’s floor.
Manual underwriting: A loan reviewed by a person against the Eligibility Matrix instead of an automated finding.
Gift of equity: A discount on the purchase price from a relative seller, which may not count toward reserves.
Vested funds: Retirement money you own outright and can withdraw regardless of your job status.
Frequently Asked Questions
Do I need reserves on a duplex if I’m living in one unit?
Yes. A duplex is a two- to four-unit principal residence, and Fannie Mae’s guide lists six months for that tier while a one-unit principal residence has no minimum. The automated system can ask for more, so treat six months as the starting point.
Does the rent from the other unit reduce the reserves I need?
No. Rent is an income item used in the ratio test, and reserves are measured against the full housing payment. Freddie Mac uses 75% of rent from a lease or appraisal market rent when income counts, but that does not offset the months of reserves.
Can my 401(k) count toward reserves?
Often, yes, if the funds are vested and allow withdrawal regardless of employment status. You do not need to withdraw the money. The lender verifies ownership and decides the usable amount.
Can a gift or a gift of equity cover my reserves?
A cash gift can, once you meet the 5% own-funds minimum above 80% LTV on a two- to four-unit. A gift of equity cannot be used for reserves, though it may help with the down payment and closing costs. Exact terms depend on the lender’s guidelines, property type, leverage, and a full review of the borrower’s file.
Is a house hacker with a backyard ADU treated the same way?
No. An ADU on a one-unit home is still a one-unit principal residence, so the two- to four-unit reserve tier does not apply. ADU income is limited to 30% of total qualifying income under Fannie Mae’s announcement.
If you are buying a home and want to see whether a conventional loan fits your file, Lendmire can help you compare the options and what each one asks of the file.
For your own numbers, request a scenario review with Lendmire.
About Lendmire
Lendmire is a mortgage brokerage (NMLS# 2371349) licensed for consumer mortgage lending in 16 states, arranging FHA, VA, conventional and jumbo purchase and refinance loans 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. Fannie Mae Selling Guide B3-4.1-01 Minimum Reserve Requirements
2. Freddie Mac Guide Section 5501.2 Reserves
3. Fannie Mae Selling Guide B3-4.3-01 Stocks, Stock Options, Bonds and Mutual Funds
4. Fannie Mae Top Trending Selling FAQs
5. Fannie Mae Selling Guide Announcement (2015)
6. Fannie Mae Selling Guide B3-4.3-04 Personal Gifts
7. Freddie Mac Guide Section 5306.1 Rental Income
8. Fannie Mae “Income assessment, now simplified”
11. ADU announcement
This article is part of Lendmire’s conventional loan program — full qualification details, guidelines, and scenarios live on the program page.
Related reading: How to Get PMI Off a 2-4 Unit Conventional Loan Early · How to Get Preapproval for a Conventional Loan · How a Conventional Loan Counts Reserve Months by Property Type
Brandon Miller
Founder & CEO, Mortgage Loan Originator, Lendmire LLC
- Mortgage Loan Originator · NMLS# 1129696 · Verify on NMLS Consumer Access
- North Carolina Real Estate Broker · License# 343312 · Verify on NCREC
- North Carolina Insurance Producer · License# 19053198 · Property, Casualty, Life, Health · Verify on NAIC SBS
- Lendmire LLC · Firm NMLS# 2371349 · Verify firm licensure
Disclosures. The information presented in this article is general market commentary, not financial, legal, or tax advice. Lendmire is a mortgage brokerage (NMLS# 2371349) — not a direct lender or depository institution — and loan placement is subject to lender underwriting. Nothing in this content represents a commitment to lend. Loan terms, pricing, and program availability vary based on borrower qualifications, property characteristics, and state of subject property, and are subject to change at any time. Lendmire complies with Equal Housing Opportunity requirements. Consumer access: nmlsconsumeraccess.org.