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Two liens · one comparison number

An embeddable blended rate mortgage calculator for the keep-or-consolidate question

It weights each loan's rate by its balance to produce one blended rate, then estimates each payment and the combined monthly payment. For a loan officer, that single figure answers the first refinance question honestly: is a new consolidated loan likely to cost less than keeping the existing first mortgage and second lien?

Homeowners sitting on a low first-lien rate and a pricier second are the refinance prospects most likely to be oversold, and this tool keeps the conversation straight.

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Start free on Originator What the numbers tell you about the borrower
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Loan Programs & Specialty

Who reaches for a blended rate calculator, and why?

Typically a homeowner who locked a low rate years ago, later added a home equity loan or HELOC, and is now hearing pitches to roll everything into one new mortgage. They are suspicious, and they should be.

The blend makes the trade visible. A $320,000 first at 3.25% plus an $80,000 second at 8.5% blends to 4.3%, because the large first balance dominates. If a new single loan would cost more than that, consolidating raises their interest cost even though it removes the expensive second. Their worry is simple: are they about to give up a rate they will never see again just to tidy up two payments?

Where does a blended rate tool fit in an LO's funnel?

Use it on equity and refinance content: a HELOC page, a debt-consolidation page, or a guide that compares a cash-out refinance with a second lien. It works as a trust builder because the answer is sometimes "keep your first mortgage", and borrowers remember the LO who told them so.

The lead it produces is a homeowner with equity and an existing relationship with debt. Look at three things when the submission lands: the first-mortgage rate (is it far below today's market?), the second-mortgage balance (is it large enough to matter?), and the combined payment (is cash flow the real pain?). A low first rate with a small second usually points toward restructuring only the second lien. A first rate near market with a sizable second makes the cash-out refinance calculator the natural next step.

Because every input travels with the lead into the built-in CRM, you can prepare a side-by-side before the first call: their blend versus a quoted single-loan scenario, including closing costs, which the blend leaves out. That preparation is the difference between a rate pitch and actual advice.

What arrives in your CRM

What the numbers tell you about the borrower

  • First Mortgage Rate (%)A first-lien rate well below current pricing means a full refinance probably raises their cost. Lead with options that leave the first mortgage alone, and say so plainly; that honesty earns the next referral.
  • Second Mortgage BalanceA large second balance relative to the first pushes the blend up and makes consolidation worth modeling. A small one rarely justifies replacing a cheap first lien, whatever the borrower has been told.
  • Blended Interest RateThis is the bar any new single loan has to clear before closing costs. If market pricing sits above it, the conversation shifts from saving interest to managing payment or simplifying.
  • Combined Monthly PaymentWhen the borrower mentions strain, this figure is the pain point. A payment-driven homeowner may accept a slightly higher blend for a longer term; confirm that trade-off in writing, not on a hunch.

A first message that uses their numbers

How should you open with a blended-rate lead?

I saw you compared your two loans and got a blended rate. Before anyone suggests replacing your first mortgage, I would like to understand what you want to fix, the monthly payment, the second loan's rate, or both. Then I can lay out a couple of options side by side, including closing costs.

Present consolidation costs and the loss of a lower first-lien rate clearly; avoid any implication that a refinance will lower total interest without showing the numbers.

Where this calculator earns its place

  1. 01

    HELOC or home equity loan page

    Homeowners researching a second lien want to know what it does to their overall borrowing cost before they apply.

  2. 02

    Cash-out refinance landing page

    Showing the blend first stops low-rate homeowners from requesting a refinance that would cost them more, which protects your reputation and your pull-through.

  3. 03

    Past-client email or newsletter

    Clients who added a second lien after closing are a natural audience, and the link gives them a reason to come back to you rather than a stranger.

Limits worth knowing

  • The blend ignores closing costs, so a new loan with a slightly lower rate can still cost more once fees are counted.
  • Both loans are amortized over the single term entered; a real HELOC may be interest-only and variable during its draw period.
  • A balance-weighted rate is a comparison figure, not an APR, and it does not reflect how fast each balance will be repaid.

Calculator disclaimer: Estimates only. The blended rate is the balance-weighted average of your two loans and is for comparison purposes. Confirm actual terms with your lender(s).

Definitions in the calculator

Blended interest rate
A single rate that represents the cost of two loans together, calculated as the balance-weighted average of their rates. A $250,000 loan at 5.5% and a $50,000 loan at 8.5% blend to 6.0%. It is a comparison figure, useful for weighing two loans against one refinance at a single rate; no lender actually charges it.
Balance-weighted average
An average in which each loan’s rate counts in proportion to its balance: multiply each rate by its balance, add the results, and divide by the total balance. A large first mortgage dominates the blend, so even a high-rate second mortgage moves the blended rate only modestly if its balance is small.
First mortgage
The primary loan secured by the home, which holds first lien position: in a foreclosure or sale it is repaid before any other mortgage. Because of that priority it usually carries the lower rate. In this calculator, its balance and rate are the larger weight in the blended rate.
Second mortgage
A loan secured by the same home that ranks behind the first mortgage, such as a home equity loan or HELOC. Because the lender is repaid second, the rate is usually higher. This calculator estimates its payment separately and combines it with the first mortgage to show total monthly cost.
HELOC
A home equity line of credit: a revolving credit line secured by the home, usually in second lien position. Rates are commonly variable, and payments may be interest-only during the draw period. This calculator amortizes the second balance at a fixed rate, so an actual HELOC payment may differ from the estimate.
Combined monthly payment
The sum of the estimated principal-and-interest payments on both loans, each amortized over the term you enter. It excludes taxes and insurance. Comparing it with the payment on a single refinanced loan at a quoted rate shows whether consolidating would lower the monthly cost, separate from closing costs.
Total balance
The first mortgage balance plus the second mortgage balance: everything currently owed against the home. It is the amount a single refinance would need to cover to replace both loans, before closing costs, and it is the base against which each rate is weighted in the blended rate.
Cash-out refinance
Replacing an existing mortgage with a larger new one and taking the difference in cash, or using it to pay off a second mortgage. The blended rate is the usual yardstick: if a new single loan’s rate is below the blend, consolidating may cut interest cost, though closing costs and a reset term also matter.

Terms on this page

Pairs well with

HELOC Calculator

Homeowners who model a HELOC are telling you how much equity they want to tap and roughly what for.

FAQ · 8 questions

Questions about this calculator

How is a blended mortgage rate calculated?

Multiply each loan's rate by its balance, add the two results, then divide by the total balance. With $320,000 at 3.25% and $80,000 at 8.5%, that is (10,400 + 6,800) ÷ 400,000, or 4.3%. The larger balance carries more weight, which is why a high-rate second mortgage moves the blend less than people expect. The calculator does this arithmetic for the borrower as they type, so they can test different balances instantly.

Does a lower blended rate mean I should keep both loans?

Often, but not always. If a single new loan would carry a rate above your blend, consolidating generally costs more interest, before you even add closing costs. Some homeowners still consolidate for a lower payment over a longer term, a fixed rate in place of a variable HELOC, or one simpler bill. The blend tells you the price of that choice.

Why does the combined payment use one term for both loans?

The calculator amortizes both balances over the term you enter so the payments can be compared on equal footing. Real second liens often have shorter terms, and HELOCs can be interest-only during the draw period, so actual payments may differ. Use the combined figure as a baseline and confirm each loan's statement for the precise amounts.

Is the blended rate the same as APR?

No. The blended rate only averages the two note rates by balance. APR reflects a loan's finance charges, such as points and certain fees, spread over its term. When you compare your blend with a new loan offer, compare it with that loan's rate and then add the closing costs separately, or compare APRs on both sides.

What kind of lead does a blended rate calculator bring a loan officer?

Mostly existing homeowners with equity and two liens, who are weighing a HELOC payoff, a second-mortgage refinance or a cash-out refinance. They are further along than a casual browser because they already know their balances and rates. Many will not need a full refinance, but they are strong candidates for second-lien products and future business.

How should I follow up when the blend is far below today's rates?

Tell the borrower that replacing the first mortgage probably raises their interest cost, then ask what problem they are trying to solve. If it is the second loan's rate or payment, explore options for that lien alone. Being direct here builds trust, and the lead's full calculation in the CRM gives you the numbers to explain it clearly.

Can I send blended-rate leads to my refinance pipeline automatically?

Yes. On Producer and Brokerage plans, a per-calculator webhook can post these submissions to a refinance or equity workflow in HighLevel, Zapier or Make. The payload includes both balances, both rates, the blend and the combined payment, plus UTM and referrer data, so your automation can tag the lead by equity situation. A failed delivery never costs you the contact; it stays in the built-in CRM.

Should this calculator sit next to the cash-out refinance calculator?

It works well that way. Put the blend first so the homeowner sees the cost bar, then offer the cash-out refinance calculator to model a single new loan. A widget with both tools lets the borrower move between them without leaving the page, and each calculation is added to the same contact's history in the CRM.

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