A mortgage refinance calculator compares your current loan with a new one to show the monthly change, the break-even point and the lifetime cost. For an FHA loan it only gives a usable answer if you enter mortgage insurance correctly. Most free calculators assume a conventional loan and quietly leave that cost out.
That omission matters because FHA mortgage insurance is part of what you pay every month and part of what you pay up front. Leave it out and a refinance can look like a clear win when it is a wash, or the reverse. This article covers the inputs to gather, the FHA costs generic tools skip, a worked Henrico County example with every formula shown, and how Duane Buziak checks a calculator result before anyone applies.
The Inputs a Refinance Calculator Needs and the Outputs That Matter
Pull the current numbers from your latest mortgage statement, not from memory. You need five items:
- Current principal balance
- Current interest rate
- Remaining term in months
- Monthly principal and interest (P&I)
- The escrow portion for taxes and homeowners insurance, listed separately
Then add the new rate, the new term and an estimate of closing costs. Ask for a Loan Estimate if you want real figures rather than a guess.
Read the outputs in this order:
- New monthly payment. Check that it includes mortgage insurance.
- Monthly savings. Old payment minus new payment, on a like-for-like basis.
- Break-even months. Costs you pay out of pocket divided by monthly savings.
- Total interest over the life of the loan. This is the check that catches a longer term disguised as a savings.
Terms worth defining
A rate-and-term refinance replaces your loan to change the rate, the term or both, without taking cash out. A cash-out refinance borrows more than you owe and pays you the difference. The break-even point is the month when cumulative savings equal what the refinance cost you. An amortization reset happens when a new 30-year loan restarts the clock on a loan that had, say, 27 years left, so early payments are mostly interest again.
The most common mistake is comparing payments only. A lower payment on a longer term can cost more in total interest, even at a lower rate. The worked example later in this article shows exactly how that happens.
Where Generic Calculators Miss FHA Mortgage Insurance
Many calculators default to conventional assumptions, which means no FHA mortgage insurance premium (MIP) at all. FHA charges two kinds, and both belong in your inputs. Figures below reflect HUD guidance as of November 2026; confirm them before relying on them.
- Upfront MIP (UFMIP): 1.75% of the base loan amount (HUD Mortgagee Letter 2015-01). It can be financed into the new balance, which raises the loan amount and the interest you pay on it.
- Annual MIP: billed monthly inside your payment. The most common tier is 0.55% for a loan term over 15 years, LTV above 95% and a base loan amount of $726,200 or less (HUD Mortgagee Letter 2023-05).
- Full annual MIP range: 0.15% to 0.75%, depending on term, LTV and loan amount. The complete grid is in HUD Handbook 4000.1, Appendix 1.0. Find your tier there rather than assuming the common one applies to you.
Duration also depends on the tier. Under HUD’s current rules, annual MIP on loans with an original LTV above 90% runs for the life of the loan, while at 90% or less it runs 11 years. Check your own case-specific terms before you model a long horizon.
How to enter it
Add the monthly MIP to the payment field, since it is billed with principal and interest. If your calculator lets you add costs to the loan, add UFMIP to the loan amount when you finance it. If you plan to pay it at closing, put it in the closing cost field. Entering it in both places double counts it.
Why the combined rate is the number to compare
Your note rate is only part of the price. The combined rate is the interest rate plus the annual MIP rate. A 6.00% note rate with 0.55% annual MIP is a 6.55% combined rate, and that is the figure to line up against your current loan. Two loans with the same note rate can carry different MIP tiers, and a calculator that ignores MIP will rank them as equals.
Matching the Calculator to the Right FHA Refinance Path
The inputs change with the type of FHA refinance, so choose the path before you run the numbers.
FHA streamline refinance
An FHA streamline requires an existing FHA loan and a review of your payment history. The standard version needs no appraisal. As of November 2026, HUD Handbook 4000.1 requires the loan being refinanced to meet seasoning rules: generally at least 210 days since closing and six payments made. It also requires a net tangible benefit. For a fixed-rate to fixed-rate streamline, that generally means the combined rate (interest plus MIP) falls by at least 0.50 percentage points. Confirm the current thresholds in the Handbook, because they can change.
Rate-and-term versus cash-out
For an FHA rate-and-term refinance, you enter the same inputs as above. For a cash-out refinance, the balance rises and so does the LTV, which can move you into a higher MIP tier and raise UFMIP dollars. HUD currently caps FHA cash-out at 80% LTV, but check Handbook 4000.1 for the current cap before you model it.
Credit tiers and loan limits
HUD’s published minimums are 580 for maximum financing and 500 to 579 with a lower LTV ceiling. Lender overlays can be stricter than HUD, which is one reason a broker with access to 500+ wholesale lenders can find an option a single lender would decline. Duane Buziak uses a NoTouch Credit Pull, a soft pull with no hard inquiry, so you can see where you stand before any scoring impact.
The 2026 FHA 1-unit limits are a $541,287 floor and a $1,249,125 ceiling (HUD Mortgagee Letter 2025-23, verified as of November 2026 on the HUD limits page). They matter mainly for cash-out and non-streamline refinances. A streamline is generally tied to your existing loan amount rather than a fresh limit test.
If your equity grows substantially, a conventional loan can later be an exit path from FHA mortgage insurance. For now, the calculator should be built around your FHA options.
Worked Example: A Henrico County FHA Refinance, Dollar by Dollar
Suppose a homeowner in Henrico County has a hypothetical FHA loan with a $250,000 balance at 6.75% and 27 years (324 months) remaining. The home is assessed at $300,000. These are illustrative numbers, not a rate quote.
The P&I formula is P = B × r ÷ (1 − (1 + r)^−n), where r is the monthly rate and n the number of payments.
- Current P&I: r = 0.0675 ÷ 12 = 0.005625. P ≈ $1,679.
- New loan: $250,000 plus financed UFMIP of 1.75% ($4,375) equals $254,375 at a hypothetical 6.00%.
- New P&I, 30-year: r = 0.005, n = 360. P ≈ $1,525.
- Annual MIP: assume the 0.55% tier on both loans. $250,000 × 0.0055 ÷ 12 ≈ $115 a month, so it does not change the comparison here.
Property tax uses Henrico’s published rate of $0.85 per $100 of assessed value (as of November 2026; confirm at henrico.us): $300,000 ÷ 100 × 0.85 = $2,550 a year, or about $213 a month. Add a hypothetical $1,500 a year for homeowners insurance, or $125 a month.
The full payment is about $2,132 before ($1,679 + $115 + $213 + $125) and $1,978 after ($1,525 + $115 + $213 + $125). A refinance does not change your tax bill, so the $154 monthly savings comes only from P&I and MIP.
Break-even and the term-reset trap
Suppose $3,500 in closing costs is paid at closing. Break-even is $3,500 ÷ $154 ≈ 23 months. The financed UFMIP is already inside the new payment, so adding it to the numerator would count it twice.
Now the total-interest check. The current loan has about $543,996 left to pay (1,679 × 324), which includes about $293,996 in interest. The new 30-year loan totals about $549,036 (1,525 × 360), with about $294,661 in interest. The borrower gets a lower rate and still pays roughly $665 more in interest over the life of the loan. Keeping 27 years at 6.00% gives a payment near $1,587, savings of about $92 a month, and about $259,884 in total interest. Break-even stretches to about 38 months, but lifetime interest drops by roughly $34,000.
Reading the Result: Break-Even, Closing Costs and When to Wait
Refinance when break-even falls well inside the time you plan to stay in the home. A 23-month break-even is comfortable for someone staying five years. It is a poor fit for someone who may sell in two. Wait if the combined rate drops only slightly, or if a move is likely.
Handling closing costs
You have three options: roll costs into the loan, pay them at closing, or ask Duane Buziak about no-out-of-pocket closing options. Rolling costs in avoids cash at the table but raises the base loan amount, which raises both your interest and the base for annual MIP. Whatever route you choose, compare it as a total cost, not as a headline rate.
Escrow surprises
Your old servicer refunds its escrow balance after payoff, often a few weeks later, so a check can arrive that looks like free money. The new escrow account must also be funded at closing, so net the two before you read the cash-to-close number as a windfall or a shortfall.
State notes
Virginia is the primary market. Alternates to Henrico’s $0.85 per $100 are Chesterfield at $0.89 (confirm at chesterfield.gov/823) and Hanover at $0.81 (confirm at hanovercounty.gov/386), both as of November 2026. In Florida, the homestead exemption under Fla. Stat. 196.031 can reduce assessed value by up to $50,000 for a qualifying owner-occupant, but it does not apply in the first year of ownership. Tax estimates should account for that. Tennessee, Georgia and DC each need a locally sourced rate for the specific county or jurisdiction before you use them.
Duane Buziak also runs Dare to Compare, a pricing challenge across 500+ wholesale lenders. It puts a competing quote next to your calculator result so you see the full picture before choosing.
Mortgage Refinance Calculator FAQs for FHA Borrowers
Are online refinance calculators accurate for FHA loans?
Only if you enter the FHA costs yourself. Many default to conventional assumptions and omit MIP, so treat the output as a rough first pass.
How do I include MIP?
Add monthly MIP to your payment field and UFMIP to the loan amount (if financed) or to closing costs (if paid in cash), never both. Compare combined rates, not note rates.
What is a good break-even period?
There is no universal number. A good break-even sits comfortably inside the time you expect to keep the home. Shorter is safer, and anything near your likely move date is a warning.
Can I refinance an FHA loan without an appraisal?
The standard FHA streamline generally does not require one, as of November 2026 under HUD Handbook 4000.1. Cash-out and non-streamline refinances do.
Does using a calculator affect my credit?
No. A calculator needs no credit pull. Some large online lenders require a hard credit pull before showing personalized terms, so verify any lender’s policy directly. Duane Buziak can discuss options with a NoTouch Credit Pull, a soft pull with no hard inquiry.
Can I remove FHA MIP by refinancing?
Refinancing into another FHA loan means you pay MIP again under the new loan’s terms. Dropping it generally means moving to a different loan type once you have enough equity, which is a separate analysis.
How often can I refinance an FHA loan?
Seasoning rules set the minimum wait, and the net tangible benefit test determines whether a streamline makes sense each time. As of November 2026, a streamline generally requires about 210 days and six payments. Confirm current rules in Handbook 4000.1.
What does a broker add that a calculator cannot?
Duane Buziak is a mortgage broker, not a lender, and can compare multiple wholesale options for an FHA refinance. He verifies your MIP tier, checks seasoning and net tangible benefit, and confirms the closing cost figures, which no generic calculator can do. No rate is promised until your file is reviewed.
Send Your Statement and Get the Break-Even Checked
A refinance calculator is only as good as its FHA inputs: the right MIP tier, UFMIP handled once, and the combined rate compared against your current loan. The rule that follows from the numbers is simple. Refinance when break-even lands well inside the time you plan to stay, and check total interest so a longer term does not erase the savings.
Send your latest mortgage statement to FHA Mortgages by Duane Buziak for a verified refinance comparison, built on 500+ wholesale lender options, a NoTouch Credit Pull and no-out-of-pocket closing options where they fit. Ready to take the first step toward homeownership with an FHA loan tailored to your needs? Schedule your free consultation today and discover how Duane Buziak can help you navigate the path to your new home with competitive rates and expert guidance. Call 804-212-8663 or visit 4860 Cox Rd, Glen Allen, VA 23060. Coast2Coast Mortgage LLC, NMLS #1110647, licensed in VA, FL, TN, GA and DC.
