It is a refinance of an existing FHA or VA loan into a new one of the same kind with reduced documentation, usually no appraisal and often no income verification, allowed only after the loan has seasoned and only where it passes the program's net tangible benefit test, and never with cash out.
Streamline is a program name, not a description of a fast lender. FHA and the VA will insure a replacement for a loan they already insure without re-proving the things they proved the first time, because the risk they are taking is already on their books. What you give up for that is flexibility: the new loan has to be the same kind of loan, it cannot produce cash, and it has to clear a test that the program defines in numbers.
What gets removed
A normal refinance re-underwrites the borrower and the property. A streamline removes most of both. There is generally no appraisal, so the value is carried over from the original loan and negative equity does not stop the application. Income documentation is normally not required, and the credit review is limited, often to the mortgage payment history rather than a full file.
What is not removed: the closing costs. A streamline is still a new loan with a new title policy, new recording and, on an FHA loan, new mortgage insurance. The paperwork is lighter; the bill is not much lighter.
The FHA version
FHA measures the wait at case number assignment and wants all three of these: six payments made, six full months since the first payment due date, and 210 days since the closing date of the loan being refinanced (HUD Handbook 4000.1). Cash back is capped at a nominal amount, $500, so nobody uses it to take equity.
The net tangible benefit test is arithmetic rather than judgment. Refinancing one fixed rate into another, the new interest rate plus the new annual mortgage insurance premium has to be at least 0.5 percentage points below the old combined figure. Different combinations, such as moving from an adjustable rate or shortening the term, have their own tests in the handbook.
Mortgage insurance is where the FHA streamline gets interesting. Loans endorsed on or before 31 May 2009 keep a grandfathered set of premiums on a streamline: 0.01 percent upfront and 0.55 percent a year. A newer loan pays the standard premiums instead, and since 2023 the standard annual premium on a low-down-payment 30-year loan has been 0.55 percent as well (0.50 percent with 10 percent or more down), so the grandfathering now mostly buys the upfront saving. Refinancing an FHA loan into another FHA loan within three years also earns a partial refund of the old upfront premium, on a schedule that falls each month.
The VA version, and the other two programs
The VA calls its version an interest rate reduction refinancing loan, an IRRRL. Under 38 U.S.C. 3709 the new loan cannot be guaranteed until the later of six consecutive monthly payments and 210 days after the first payment due date of the old loan. The fees have to be scheduled to be recouped within 36 months of the new loan, and refinancing one fixed rate into another requires a drop of at least 0.5 percentage points. The funding fee on an IRRRL is 0.5 percent of the loan, well below a purchase, and veterans receiving compensation for a service-connected disability are exempt.
USDA runs a streamlined assist refinance on its guaranteed loans, which asks for twelve consecutive on-time payments and a drop of at least $50 in the monthly payment, with no appraisal and no credit or income review. Conventional loans have no streamline program at all. What they have instead is value acceptance, the appraisal waiver the agencies issue through their underwriting systems, which removes the same week and the same few hundred dollars but leaves the rest of the underwriting in place.
Whether it is a good idea is the net tangible benefit test
The question gets asked as though the programs left it open, and they do not. FHA and the VA both wrote a minimum improvement into the rules because a refinance that helped nobody but the person writing it was once common. If a streamline does not clear the 0.5 point test or the 36-month recoupment, it does not happen.
That leaves one thing for the borrower to work out, and it is the same thing as on any refinance: the closing costs against the monthly saving, and how long the loan will be held. A streamline that clears the program test by a hair and costs $5,000 has a long break-even. One that drops the combined rate by a point and a half does not.
Questions people ask
Do you need an appraisal for a streamline refinance?
Normally no. FHA streamlines and VA IRRRLs carry over the value from the original loan, which is what allows an owner with little or negative equity to use them, though an individual lender can still require one as its own overlay.
Can you get cash out of a streamline refinance?
No. FHA caps incidental cash back at $500 and the VA IRRRL is a rate reduction loan by definition. Taking equity out of an FHA or VA loan means a cash-out refinance, which is fully underwritten and has its own seasoning rules.
Can you streamline refinance a conventional loan?
There is no conventional streamline program. A conventional rate-and-term refinance is fully underwritten, but it may qualify for an appraisal waiver from the agencies' underwriting systems, which removes the appraisal step and its cost.