FHA streamline refinance calculator and net tangible benefit worksheet

How is the FHA streamline net tangible benefit calculated?

The FHA streamline net tangible benefit is calculated by comparing two combined rates — your current interest rate plus your current annual MIP rate, against the proposed interest rate plus the proposed annual MIP rate — and testing the difference against the threshold HUD publishes for your exact product change. It is a comparison of rates. The monthly payment never enters the test.

HUD Handbook 4000.1, whose Update 17 was last revised November 26, 2025, defines the benefit in a single sentence, and the sentence lists three separate ways to earn it:

"A Net Tangible Benefit is a reduced Combined Rate, a change from an ARM to a fixed rate Mortgage, and/or a reduced term that results in a financial benefit to the Borrower."HUD — FHA Single Family Housing Policy Handbook 4000.1, Update 17, Net Tangible Benefit of Streamline Refinances, p. 453 (hud.gov)

Read the "and/or" literally, because the charts that follow it do. A file can qualify on rate alone, on the move out of an adjustable rate alone, or on a shortened term — and the number you have to hit is different in each case. That is why a single "how much do rates need to drop" answer is always wrong: HUD publishes nine different thresholds for transactions without a meaningful term reduction, and three more for transactions with one.

Everything below assumes you are already eligible for the program itself. If you are not sure whether you are, our companion guide to how an FHA streamline refinance works in Las Vegas covers eligibility, the appraisal waiver and the credit-qualifying versus non-credit-qualifying choice; this page is only about the arithmetic.

What is your combined rate, and where do you find it?

Your combined rate is the interest rate on your mortgage plus your annual mortgage insurance premium rate, added together and treated as one percentage. HUD defines it in one line, and both halves of it sit on paperwork you already have.

"Combined Rate refers to the interest rate on the Mortgage plus the Mortgage Insurance Premium (MIP) rate."HUD — FHA Single Family Housing Policy Handbook 4000.1, Update 17, Net Tangible Benefit — Definitions, p. 454 (hud.gov)

The interest rate is on your note and on every monthly statement. The annual MIP rate is the one people guess at, and guessing is unnecessary: HUD publishes it in Appendix 1.0 of the handbook, effective for case numbers endorsed on or after March 20, 2023 under Mortgagee Letter 2023-05. On a term longer than 15 years with a base loan amount of $726,200 or less, annual MIP is 55 basis points (0.55%) above 95% loan-to-value and 50 basis points (0.50%) at or below it. Larger balances run 70 and 75 basis points on the same LTV split, and terms of 15 years or less run 15 or 40 basis points on base loan amounts of $726,200 or less — a 15-year term on a larger balance above 90% LTV carries 65 basis points.

One vintage is treated entirely differently. If the FHA loan you are refinancing was endorsed on or before May 31, 2009, HUD prices the streamline under a separate line in Appendix 1.0: annual MIP of 55 basis points at every loan-to-value, and an upfront premium of just 1 basis point (0.01%) instead of the usual 1.75%. That is a materially different cost structure, and it is worth confirming the endorsement date before anyone quotes you anything.

How far does the combined rate have to fall?

The FHA streamline combined rate reduction depends on the product you are leaving and the product you are entering: at least 0.5 percentage points for fixed into fixed, at least 2 percentage points for fixed into an ARM, and no more than a 2-percentage-point increase when any ARM converts into a fixed rate. HUD prints the whole grid, and this is the version that applies when the term is not reduced, or is reduced by less than three years.

Three things in that grid surprise people. The first is that the fixed-to-fixed hurdle is 0.5 percentage points on the combined rate, not on the interest rate — so if a lender credit is bought with pricing, the credit is spending the very margin that qualifies the loan. The second is that moving into an adjustable rate is deliberately expensive: HUD asks for a full 2 percentage points, four times the fixed-to-fixed requirement, because the borrower is taking on rate risk. The third is the only cell that permits an increase: any ARM converting to a fixed rate can land up to 2 percentage points above the prior combined rate and still qualify, because HUD treats the removal of rate risk as the benefit.

One eligibility rule quietly deletes two columns for some owners. HUD permits streamline refinancing on a property you no longer live in, but non-owner occupied properties and HUD-approved secondary residences are eligible only for refinancing into a fixed rate mortgage. If that is your situation, the ARM columns never apply — the rules and the tighter loan-amount formula are covered in the pros, cons and rental-property rules of an FHA streamline.

What changes if the new loan cuts three or more years off the term?

An FHA streamline that reduces the remaining amortization period by three years or more is scored against a second, more permissive chart: a fixed-to-fixed refinance only needs a new combined rate below the prior combined rate, with no minimum spread. HUD attaches a hard condition in exchange.

"Additionally, the combined principal, interest, and MIP payment of the new Mortgage must not exceed the combined principal, interest, and MIP payment of the refinanced Mortgage by more than $50."HUD — FHA Single Family Housing Policy Handbook 4000.1, Update 17, Standard for Refinances with a Term Reduction of Three Years or More, p. 454 (hud.gov)

This is the chart that rescues a file the first grid rejects. A borrower whose combined rate improves by less than half a point cannot pass the standard fixed-to-fixed test — but shortening a 30-year loan to a 20-year loan reduces the remaining amortization by far more than three years, and the requirement drops to simply being below where you were. The trade is the $50 ceiling: a shorter schedule pushes the principal portion up, so the new combined principal, interest and MIP payment has to stay within fifty dollars of the old one. On many files it does not, and that is what quietly kills the term-reduction route.

Note the ceiling on the other side too. HUD caps a streamline's amortization at the lesser of your remaining period plus 12 years, or 30 years, so a streamline can lengthen your payoff as easily as shorten it. Compare the payoff dates, not only the payments.

Does your loan clear HUD's net tangible benefit test?

The FHA streamline calculator below applies HUD's published charts to figures you enter yourself, then reports the standard that governs your product change, whether the combined rate movement clears it, the earliest date your lender can request an FHA case number, and how long the transaction takes to pay for itself. Nothing is stored, nothing is sent, and no rate is suggested to you — the scenario figures come from a Loan Estimate or a conversation you have already had.

Two outputs deserve a comment. The HUD standard that applies row names the exact cell being used, so you can check it against the tables above rather than trusting a verdict. And months to recover total cost is deliberately conservative: it counts the new upfront premium, net of any refund credit, as a real cost even though it is normally financed rather than paid at the table. A break-even that ignores the premium flatters every refinance.

How do you fill out a net tangible benefit worksheet?

An FHA streamline net tangible benefit worksheet is ten lines long: three build your current combined rate, three build the proposed combined rate, two record the product change and any term reduction, one states the HUD standard those choices select, and the last records the pass or fail. Lender versions vary in layout, never in content.

Work down it in order. Every figure has one correct source, and writing the source next to the number is what makes the sheet auditable later.

1. Line 1 — current interest rate. Take it from the note or the monthly statement, not from memory.
2. Line 2 — current annual MIP rate. From the original closing disclosure or the servicer. If the loan was endorsed on or before May 31, 2009, note that vintage here; it changes the pricing on the new loan.
3. Line 3 — current combined rate. Line 1 plus line 2.
4. Line 4 — proposed interest rate. From a Loan Estimate. Never from an advertisement or a national average.
5. Line 5 — proposed annual MIP rate. From HUD Appendix 1.0, using the loan-to-value FHA will apply and the base loan amount and term of the new loan.
6. Line 6 — proposed combined rate. Line 4 plus line 5.
7. Line 7 — product change. From: fixed, ARM under 15 months to the next payment change, or ARM 15 months or more. To: fixed, one-year ARM, or hybrid ARM.
8. Line 8 — reduction in term. None, under three years, or three years or more, measured against the remaining amortization period rather than the original term.
9. Line 9 — the standard that applies. Read the cell from the chart that lines 7 and 8 select, and write it out in words.
10. Line 10 — result. Compare line 6 with line 3 against line 9. If line 8 says three years or more, add the second test: the new combined principal, interest and MIP payment minus the old one must be $50 or less.

Most lender worksheets then carry a short seasoning block, and it is worth completing even on a printed copy for your own file: the closing date of the loan being refinanced, its first payment due date, the number of payments made, and the intended case number assignment date. Those four entries are what the underwriter checks the three clocks against.

What does the 210-day rule mean for your timeline?

The FHA streamline 210-day rule sets the earliest date your lender may request an FHA case number, not the earliest date you may close. HUD runs three clocks at once and measures all of them to the case number assignment date: at least 210 days from the closing date of the loan being refinanced, at least six full months since that loan's first payment due date, and at least six payments made on it.

Because the clocks are measured from different events, they rarely finish together, and the later one wins. A loan that closed on the 15th of a month usually has its first payment due six weeks later, on the first of the second following month. Six full months from that first payment date typically lands after the 210th day from closing — so for a mid-month closing the payment clock is normally the binding one, and counting 210 days on a calendar will make you a few weeks too optimistic.

Two adjacent rules matter here. If you assumed the loan being refinanced, HUD requires six payments since the assumption. And if the loan has been modified, the six payments must have been made under the modification agreement. The rest of the eligibility picture, including the payment-history standards for the credit-qualifying and non-credit-qualifying versions, sits in our guide to FHA streamline eligibility in Las Vegas. If you want the payment side of the picture rather than the benefit test, the payment, affordability and buydown calculators on our parent site handle that arithmetic.

Where does the upfront MIP refund credit belong in the math?

The upfront MIP refund credit belongs on the cost side of a streamline calculation and never on the benefit side. It reduces the new upfront premium rather than lowering your rate, so it cannot change whether the net tangible benefit test passes — only how quickly the transaction pays for itself.

The schedule is arithmetic rather than judgment. Refinance one FHA-insured mortgage into another within 3 years and HUD applies a credit that starts at 80% in the first month and falls exactly 2 percentage points every month, reaching 10% in month 36 and nothing from month 37 onward. Put another way, the credit percentage is 82 minus twice the month number. Every month of hesitation costs two points of your original upfront premium; a quarter costs six. The full published month-by-month table appears in our breakdown of what an FHA streamline really costs.

Then add the premium the credit is being applied against. A streamline is a new FHA-insured loan, so a fresh upfront premium of 1.75% of the base loan amount is assessed — unless the loan being refinanced was endorsed on or before May 31, 2009, in which case it is 0.01%. Annual MIP continues either way, and HUD calculates the governing loan-to-value from the property's original value rather than today's, which is why a streamline can never end mortgage insurance. The routes that actually do are laid out in the math on refinancing out of FHA mortgage insurance and, for the underlying premium rules, in our explainer on how FHA MIP works.

One last cost-side rule catches people: HUD's maximum mortgage calculation for a streamline contains no line for borrower-paid closing costs, so they cannot be financed into the new loan. Whatever you are quoted is either paid at closing or bought with pricing, and pricing spends the same combined-rate margin the benefit test measures.

What can a calculator not decide about your streamline?

An FHA streamline calculator cannot decide anything HUD assigns to a human underwriter, and HUD assigns the whole file. Every streamline refinance is manually underwritten, which means no automated finding — from this tool or from anyone else's — approves anything.

"The Mortgagee must manually underwrite all Streamline Refinances. The Mortgagee may score the Mortgage through TOTAL Mortgage Scorecard but the findings are invalid."HUD — FHA Single Family Housing Policy Handbook 4000.1, Update 17, Use of TOTAL Mortgage Scorecard on Streamline Refinances, p. 453 (hud.gov)

Three inputs in particular are estimates until a lender confirms them. The proposed annual MIP rate depends on the loan-to-value FHA will use, which comes from the original value of the property rather than a current one. The new base loan amount is the output of HUD's own formula — the lesser of the outstanding principal balance plus certain amounts due, or the original principal balance including financed upfront MIP, less any refund — and not a number you choose. And the payment history standard is a real test: HUD requires payments made within the month due for the six months before case number assignment, with no more than one 30-day late.

Lender overlays sit on top of all of it and can be stricter than the handbook on credit, occupancy documentation or seasoning. Ask, in writing, which overlays apply before you assume a file is dead. For the wider question of whether a streamline is the right transaction at all — against a cash-out, against staying put, or against leaving FHA entirely — start from our FHA loans in Las Vegas hub or the comparison in our guide to the FHA cash-out refinance. And because a refinance re-opens your escrow account, it is a natural moment to re-shop the coverage inside it; our sister agency handles homeowners insurance in Las Vegas.

Frequently asked questions

The bottom line

An FHA streamline refinance is approved on a published arithmetic test, and the arithmetic is short enough to do yourself. Add your interest rate to your annual MIP rate to get the combined rate HUD actually measures, do the same for the scenario in front of you, and find your product change on the right chart: 0.5 percentage points for fixed into fixed, 2 percentage points for fixed into an ARM, and up to a 2-percentage-point increase when any ARM converts to a fixed rate. Cut three or more years off the remaining term and a looser rate chart applies, bought with a hard $50 ceiling on how much the combined principal, interest and MIP payment may rise. Timing runs on its own three clocks, all measured to the FHA case number assignment date: 210 days from the old loan's closing, six full months from its first payment due date, and six payments made — and for a mid-month closing the payment clock usually binds last. The upfront premium refund credit, 80% in month 1 falling 2 points a month to 10% in month 36, changes your break-even but never your eligibility. What none of it decides is approval: HUD requires every streamline to be manually underwritten, and lender overlays can be stricter than the handbook. Everything on this page is general information, not legal or tax advice, and not a quote, offer, or commitment to lend.