The Quick Read: A cash-out refinance raises your debt-to-income ratio by the amount the new payment exceeds the old one, divided by your gross monthly income, and no official source publishes a standard figure for that. On a 2-4 unit home you live in, the size of the jump depends on how much cash you take, what the new payment includes, how much rent the lender may count from the other units, and what other debts you carry. Rent from the unit you occupy never counts.
Key Takeaways
- DTI is all monthly debts divided by gross monthly income. A bigger loan means a bigger housing payment, and that payment goes straight into the ratio.
- Only part of the rent from the units you don’t live in is added to income. The rent from your own unit is not.
- Conventional cash-out on a 2-4 unit principal residence is capped at 75% LTV. A one-unit home gets 80%.
- Crossing 45% DTI on an automated cash-out file triggers a six-month reserve requirement. The automated ceiling is 50%.
- FHA Streamline and VA IRRRL loans do not allow cash out, so they are not options for this question. Every figure here varies by lender and program — guidelines, property type, leverage, and credit profile all apply.
How Is DTI Calculated on a Cash-Out Refinance?
DTI is your total monthly debt payments divided by your gross monthly income. The Consumer Financial Protection Bureau describes it as one way lenders measure your ability to manage monthly payments, and notes that limits differ by product and lender.
Per the Fannie Mae Selling Guide, the top half of the ratio is the qualifying payment on the new mortgage plus other long-term and significant short-term debts. The bottom half is your total monthly qualifying income.
In a refinance, the old mortgage payment drops out and the new one takes its place. Everything else stays: car loans, student loans, credit card minimums. So the change in DTI comes from one swap. Old housing payment out, new housing payment in.
| What changes | What stays the same |
|---|---|
| Principal and interest on the new balance | Car, student and card payments you keep |
| Taxes and insurance if re-estimated | Your gross income from work |
| Mortgage insurance, if any | The documented history of your other debts |
| Payments on any debts paid off at closing | Counted rent from the other units; the unit you occupy counts none |
The Rule of Thumb: Turning a Payment Increase Into DTI Points
Divide the extra monthly payment by your gross monthly income. That gives the points added to DTI.
Here is how the scale works, using relative terms only. If your gross monthly income is large relative to the payment increase, the ratio barely moves. If the increase is a meaningful slice of income, the ratio moves by that same slice. A payment bump equal to 5% of your gross monthly income adds 5 points to DTI. A bump equal to 10% adds 10.
Then subtract the offset. Debts paid off at closing remove payments from the top of the ratio. Counted rent is already in the bottom of the ratio and does not grow because you borrowed more, so it cushions the result but does not shrink the increase. Only the payoffs pull the final number back down.
That is why no source gives one number. The same cash-out can add a few points for one household and a lot for another.
What Drives the New Payment Up or Down?
Five levers set the new payment, and the amount of cash taken is the biggest of them.
1. Loan amount. The new loan equals the payoff of the existing first mortgage, plus closing costs, plus the cash you take. Every dollar of cash raises the balance.
2. Loan term. A longer term spreads the balance out and lowers the monthly figure. A shorter term does the reverse.
3. Interest rate. A different rate changes the payment on the same balance. A lower rate does not always mean a lower payment if the balance grew enough to offset it.
4. Taxes and insurance. These sit inside the housing payment. If an escrow re-analysis raises them, DTI rises even if the loan terms did not change.
5. Mortgage insurance. Required above 80% LTV on conventional loans. It cancels at 80% on request and ends automatically at 78%. On a 2-4 unit cash-out, the 75% cap means this rarely applies at closing. Final terms depend on lender guidelines, property type, leverage, and the borrower’s complete credit picture.
Borrowers often focus on principal and interest and forget that a 2-4 unit can carry higher insurance than a single-family home. The underwriter counts the full payment, not just the loan piece.
Why a 2-4 Unit Behaves Differently
Three rules make a 2-4 unit different from a one-unit home: a lower leverage cap, a partial rent credit, and a hard rule about your own unit.
The leverage cap limits the cash. Per the Fannie Mae Eligibility Matrix, conventional cash-out on a principal residence is capped at 75% LTV for two to four units and 80% for one unit. A smaller cap means a smaller maximum loan, which puts a ceiling on how far the payment can climb. The same matrix lists a higher ceiling for limited cash-out, which only covers payoff and closing costs. These specifics are subject to lender guidelines and a full review of property, leverage, and credit.
Rent from the other units counts, in part. Freddie Mac’s 2-4 unit mortgage page says rental income from the other units can be added to the borrower’s income to calculate housing expense and DTI. The usual method is a discounted share of the appraiser’s market rent or the leases, whichever is lower. The discount covers vacancy and upkeep. On a primary residence, the mortgage payment is not subtracted from that rent, because it is already your housing payment.
Your own unit’s rent never counts. Fannie Mae’s rental income rule, as archived in its Selling Guide, says rental income from the unit the borrower occupies cannot be used. The appraiser still reports market rent for your unit, but it does not help your ratio.
| Unit count | Occupied by you | Rented out | Effect on DTI |
|---|---|---|---|
| 2 units | 1 | 1 | One unit’s discounted rent counts |
| 3 units | 1 | 2 | Two units’ discounted rent counts |
| 4 units | 1 | 3 | Three units’ discounted rent counts |
More rented units means more income offset. A fourplex with three tenants softens the payment increase more than a duplex with one. Leverage caps stay the same across all three.
A Worked Example
Picture a borrower with a fully rented triplex who lives in one unit. The home appraises with room under the 75% LTV cap, and the borrower takes a modest cash-out. Terms depend on the lender’s guidelines, the property type, the leverage, and a full review of the credit profile.
Step by step, here is what an underwriter does:
1. Sets the new loan at the payoff, closing costs and cash.
2. Builds the new housing payment from principal, interest, taxes, insurance and any HOA dues.
3. Takes the appraiser’s market rent for the two rented units, compares it with the leases, and counts the lower figure at a discount.
4. Adds that counted rent to the borrower’s gross income.
5. Adds other monthly debts to the new housing payment.
6. Divides total debts by the new total income.
Now the direction of the result. Before the cash-out, DTI reflects the old housing payment against income plus counted rent. After, the housing payment is larger while counted rent is unchanged, since rent does not grow because you borrowed more. So the whole increase falls on the top half of the ratio.
Variant: the borrower uses part of the cash to retire a car loan and a credit card. Those payments leave the top half. If the payments retired are larger than the payment increase, DTI can actually fall. If not, it still rises, just less.
This is illustrative only. Real files turn on the exact payment, income and debts.
Does Paying Off Debt With the Cash Fix It?
Sometimes. Run one test: payments retired minus payment increase.
- Result positive: DTI falls. The debts you cleared cost more per month than the new loan adds.
- Result near zero: DTI is roughly unchanged.
- Result negative: DTI rises. The cash-out added more payment than it removed.
Payment size matters, not balance. A large balance with a tiny payment, such as a low-payment student loan, removes little from DTI. A small balance with a high payment, such as a credit card or short-term auto loan, removes a lot.
One caution. Moving unsecured debt onto the home turns it into debt secured by the home. And if the cleared cards fill up again, DTI ends up worse than before.
Where the Reserve and DTI Thresholds Bite
On Fannie Mae’s automated underwriting, the maximum DTI is 50%, per the Selling Guide. Manually underwritten loans top out at 36%, or 45% with stronger credit and reserves. The same guide lists cash-out refinances as an exception category where the ceiling may be lower.
The cash-out section of the Selling Guide adds a trigger. On automated files, a DTI above 45% requires six months of reserves. So the decision point is practical: if your estimate lands between 45% and 50%, you need cash left in the bank after closing.
The wholesale conventional programs start at a 620 decision score, and the automated finding governs most files. Lenders can add their own limits on top of agency rules, so one lender may say no where another says yes. Program figures are subject to lender guidelines and full file review.
If recalculated DTI exceeds the limit at any point before delivery, the loan is no longer eligible. New debt on the subject property also forces a re-run. Do not open new credit between application and closing.
Rules That Shape the Timing
Two seasoning rules apply to a conventional cash-out. The first mortgage being paid off must be at least 12 months old, measured note date to note date. At least one borrower must have been on title for 6 months before disbursement. Exceptions exist for inheritance, divorce, delayed financing and certain LLC or trust ownership.
Fannie Mae put the 12-month rule in place for cash-out refinances with note dates on or after April 1, 2023. Properties listed for sale must come off the market by the disbursement date.
Where the General Rule Breaks
Newer landlords. A borrower with less than one year of rental income history or property-management experience may have counted rent limited. Fannie Mae addressed this in announcement SEL-2023-09.
ADU and boarder income. The accessory-unit income rule is for one-unit homes, capped at 30% of qualifying income, per Fannie Mae SEL-2025-08. It does not apply to a true 2-4 unit. The boarder-income exception is narrow: a disabled borrower’s live-in personal assistant.
The 95% LTV misconception. The 95% figure for two- to four-unit principal residences applies to purchases and no-cash-out refinances, not cash-out. Cash-out is capped lower. The exact numbers vary by lender and program and follow a full review of property, leverage, and credit.
The “federal DTI cap” myth. The CFPB’s General QM rule replaced the old fixed DTI cap with a price-based test. Lenders must still consider and verify DTI. Agency and FHA limits are what bind in practice.
Streamlines. The FHA Streamline allows no cash out, per the FDIC’s FHA summary. The VA IRRRL says you may not receive any cash from the loan proceeds. Neither runs a cash-out DTI analysis. For a borrower who wants cash from an FHA or VA home, the product is a different one.
FHA cash-out. Standard FHA cash-out is for owner-occupied principal residences, and HUD lowered its maximum LTV to 80% in Handbook 4000.1. It carries its own payment-history requirement.
Options for a Tight Ratio
| Option | Cash to you | DTI effect |
|---|---|---|
| Conventional cash-out | Yes, up to the 75% cap | Payment rises with the balance |
| Limited cash-out refinance | Only incidental cash | Smaller change, balance moves little |
| Smaller cash-out amount | Less | Smaller payment increase |
| Add a co-borrower | Same | Adds income to the bottom of the ratio |
For many 2-4 unit owners, the cleanest fix is a smaller cash-out. Taking only what the project needs keeps the payment increase small. A broker can run the file against several wholesale programs to see which one the ratio fits.
Common Mistakes That Push DTI Higher
- Counting the rent from the unit you live in.
- Assuming all rent from the other units counts at full value.
- Rolling closing costs into the loan without checking the effect on the payment.
- Forgetting that insurance and taxes on a multi-unit property sit inside the payment.
- Opening a new card or car loan before closing.
- Assuming a lower rate always means a lower payment.
- Paying off a low-payment debt and expecting a big ratio drop.
Gather leases, the most recent tax return pages that show rental income, and a list of every monthly debt before you apply. Expect an appraisal with a rent schedule.
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
DTI (debt-to-income ratio): Your total monthly debt payments divided by your gross monthly income.
Gross monthly income: What you earn each month before taxes and deductions, plus any rent the lender allows.
Qualifying payment: The full housing payment the lender uses in the ratio, including principal, interest, taxes, insurance and any HOA dues.
Seasoning: The minimum time you must have owned the home, or held the loan being paid off, before a cash-out is allowed.
Reserves: Liquid funds left after closing, counted in months of the housing payment.
Limited cash-out refinance: A refinance that pays off the old loan and closing costs, with only incidental cash back.
Form 1025: The appraisal report for small residential income properties, which includes a market rent schedule.
Frequently Asked Questions
Does a cash-out refinance always raise DTI?
No. It usually does, because the balance and payment grow. But if the payments you retire with the cash are larger than the payment increase, DTI can drop. The test is payments retired minus payment increase.
Does the rent from my other units count as income?
Yes, in part. Rent from the units you don’t occupy can be added to income, at a discount, using the lower of the appraiser’s market rent or your leases. Rent from your own unit cannot be used.
Is the DTI limit different for a duplex or fourplex?
The DTI ceilings are the same as for a one-unit home: 50% on automated files, with manual limits of 36% or 45%. What differs is the leverage cap, 75% LTV for cash-out on two to four units versus 80% on one, which limits how much payment you can add. Final terms depend on the lender’s guidelines, the property type, and the borrower’s complete credit picture.
Do I need reserves for a cash-out on a 2-4 unit home?
Often. On an automated cash-out file, a DTI above 45% requires six months of reserves. Other reserve rules can apply depending on the program, the credit profile and the lender, all subject to full file review.
Can I use an FHA Streamline or VA IRRRL to take cash out?
No. Both prohibit cash out. They lower the cost of an existing FHA or VA loan with a lighter review, and neither is a vehicle for tapping equity.
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. See its cash-out refinance programs, or request a scenario review with Lendmire for your own numbers.
For current guidelines and terms, see Lendmire’s refinance programs page.
About Lendmire
Lendmire (NMLS# 2371349) is a mortgage broker licensed for consumer lending in 16 states. Lendmire arranges FHA, VA, conventional and jumbo purchase and refinance loans through wholesale lenders; every file is underwritten by the lender under the applicable program guidelines. Scotsman Guide named Lendmire a Top Mortgage Workplace in both 2025 and 2026.
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References
1. CFPB, What Is a Debt-to-Income Ratio?
2. Fannie Mae Selling Guide B3-6-02, Debt-to-Income Ratios
3. Fannie Mae Eligibility Matrix
4. Freddie Mac, Mortgages for 2-4 Unit Properties
5. Fannie Mae Selling Guide, Rental Income (archived)
6. Fannie Mae Selling Guide B2-1.3-03, Cash-Out Refinance Transactions
7. Fannie Mae cash-out announcement
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 to Budget a Cash-Out Refinance Remodel on a 2-4 Unit Primary Home · How Much a Cash-Out Refinance Returns on a 2-4 Unit Primary Home · How to Get Cash Back on a 2-4 Unit Primary Home With Cash-Out Refinance
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.