You have probably seen the ad: a home equity line of credit at 5.49%, or 5.99%, when everything else you borrow against costs 8% or more. It looks like a bargain, and the lender’s website will happily let you believe it. Here is the catch that a November 2026 survey of 271 HELOCs from 201 lenders makes impossible to ignore: the advertised rate is very often a teaser — an introductory rate that lasts six months — and what you actually pay for most of the life of the line is the prime rate plus the lender’s margin. Right now prime is 7.00%, the median margin in that survey is prime plus zero, and margins range all the way from prime minus 1.25 to prime plus 3.25. On a $50,000 balance, that spread is the difference between about $240 a month in interest-only payments and about $427. Same prime rate, same house, same borrower — wildly different bill. The margin is the price. Everything else is marketing.
This article shows you how to read a HELOC quote the way a lender prices it: index, margin, floor, cap, and intro period, in that order. You will get the current numbers, a payment table you can check against any quote, and a shopping checklist that takes about fifteen minutes per lender. No lender paid for placement here, and none of these numbers is a quote for you personally — your margin depends on your credit score and how much of your home’s value you borrow. But once you know what to ask, no teaser rate can fool you again.
How a HELOC rate is actually built
A HELOC is a revolving line of credit secured by your home. You draw what you need during a draw period, usually 10 years, often paying interest only. Then comes a repayment period, usually 10 to 20 years, when you pay principal and interest. Almost every HELOC rate is variable, and almost every variable HELOC rate is built from exactly two parts:
Your rate = index + margin.
The index is almost always the prime rate — specifically the Wall Street Journal prime rate, the benchmark US banks use for their best commercial customers. Prime is the same for every lender, and it moves when the Federal Reserve moves. As of late October 2026, prime is 7.00%, down from 7.50% in July 2026 after the Fed’s September rate moves, with the federal funds target range at 3.75% to 4.00%. Prime generally sits three percentage points above the top of that range, so it tends to move whenever the Fed does.
The margin is the lender’s markup, fixed for the life of your line. It is set when you are approved, based on your credit score, your combined loan-to-value ratio (CLTV — your mortgage plus the HELOC, divided by your home’s value), and sometimes your relationship with the lender. Unlike prime, the margin never moves with the Fed. It is the one part of the rate you can shop, and it is the one part lenders least want you to focus on, because it is where they actually make their money.
Then there are the guardrails: the floor and the cap. The floor is the lowest your rate can go, no matter how far prime falls. The cap — usually a lifetime cap, sometimes also a periodic cap on how much the rate can rise at one adjustment — is the highest it can go. And then there is the teaser: an introductory rate, often fixed for six months, that has nothing to do with prime plus margin at all. The teaser is what goes in the ad. Prime plus margin is what shows up on your statement in month seven.
What the November 2026 survey actually found
The survey behind this article, published by Your Best Loan Rates in November 2026, collected the margin, floor, and terms that 201 lenders publish for 271 HELOCs, then priced each one at the current prime rate of 7.00%. It is not a perfect census — 492 additional HELOC quotes the tracker follows publish no margin at all and could not be counted, which is itself a warning about transparency — but among the 251 quotes whose published rate matched prime plus the published margin (or the floor), the picture is striking.
The median margin is prime plus zero. That means the typical fully-disclosed HELOC today costs exactly prime: 7.00%. Margins range from prime minus 1.25 to prime plus 3.25. About 37% of quotes — 93 of 251 — price below prime. Another 77 sit exactly at prime. And 81 charge more than prime, 31 of them by a full point or more. The distribution is lumpy in a useful way: 21 quotes sit below prime minus 0.5, 72 sit between prime minus 0.5 and prime, 50 sit between prime and prime plus 1, 23 sit between prime plus 1 and prime plus 2, and only 8 charge prime plus 2 or more.
Sixty-one percent of quotes state a rate floor, and the median floor is 3.99%. Floors matter more than most borrowers realize, and I will show you why below. At the top of the table, the lowest ongoing rates cluster around 6.00% — for example, Jeanne D’Arc Credit Union at prime minus 1 (6.00%, $50,000 balance, 80% CLTV), John Marshall Bank at prime minus 1 (6.00%, floor 3.99%), and Robins Financial Credit Union at prime minus 1 (6.00%, up to 95% CLTV). The lowest advertised intro rates are lower still — BMO’s 6-month introductory HELOC at 5.49% APR leads one ranking — but that is a six-month rate, not a life-of-loan rate, and confusing the two is the most expensive mistake in this article.
For context, the national average HELOC rate across all lenders is higher than the survey’s median disclosed quote: about 8.58% as of November 1, 2026, according to a separate lender roundup. The gap between 7.00% (median disclosed margin pricing) and 8.58% (national average) tells you something important: the average borrower is not getting the median deal. Average borrowers carry average credit, borrow at higher CLTVs, and — critically — many never get past the teaser to compare margins at all.
The payment table: what each margin costs you
Interest-only math is simple, and that simplicity is your friend when comparing quotes. Monthly interest-only payment equals balance times annual rate divided by 12. Here is what that means on a $50,000 balance at today’s prime of 7.00%:
| Margin | Your rate at prime 7.00% | Interest-only payment on $50,000 |
|---|---|---|
| Prime − 1.25 | 5.75% | $239.58/month |
| Prime − 1.00 | 6.00% | $250.00/month |
| Prime − 0.50 | 6.50% | $270.83/month |
| Prime + 0 | 7.00% | $291.67/month |
| Prime + 0.50 | 7.50% | $312.50/month |
| Prime + 1.00 | 8.00% | $333.33/month |
| Prime + 2.00 | 9.00% | $375.00/month |
| Prime + 3.25 | 10.25% | $427.08/month |
Read that table twice, because it is the whole article in numbers. The spread from the best margin to the worst is $187.50 a month, or $2,250 a year, on a $50,000 balance — and that is before any balance above $50,000, before the repayment period starts adding principal, and before a single Fed hike. On a $100,000 balance, double everything: a half-point margin difference alone is $500 a year, every year, for as long as you carry the balance.
Now add the teaser trap. Suppose Lender A advertises 5.49% for six months, then prime plus 1.50% (8.50% today). Lender B advertises no teaser at all, just prime minus 0.50% (6.50% today). On $50,000, Lender A costs $228.75 a month for six months, then $354.17. Lender B costs $270.83 from day one. By month 18, you have paid more to Lender A — and for every month after that, you keep paying more, by $83.34 a month, until prime moves or you refinance the line. The ad that looked cheaper was cheaper for half a year and more expensive for the next nine and a half. Always ask: “What is my rate in month seven?” If the answer is not prime plus a margin you can live with, walk away from the teaser.
Floors: the quiet clause that bites when rates fall
A floor sounds protective — your rate cannot go below it, which sounds like a bad thing only if you expect rates to fall. But consider what a floor does to the margin story. The median floor in the survey is 3.99%, and 61% of quotes have one. At today’s prime of 7.00%, a 3.99% floor is irrelevant: your rate is prime plus margin, well above the floor. Floors only bite when prime falls a long way — and that is exactly when borrowers expect relief.
Say prime falls to 4.00% in a future easing cycle and your margin is prime minus 1. Without a floor, your rate would be 3.00%. With a 3.99% floor, it is 3.99% — nearly a full point higher than your margin promised. The floor, in other words, caps your upside when rates fall, while the lifetime cap (often 18%, sometimes higher) barely constrains your downside when rates rise. Ask for both numbers in writing: “What is my floor, and what is my lifetime cap?” If a lender will not state a floor, assume the worst and compare accordingly. And note the survey’s subtlety: some quotes in the table are priced at their floor rather than at prime plus margin, which is why a quote can show a rate that does not match its stated margin. If the math on a quote does not add up, the floor is usually the reason — ask.
The margin-shopping checklist
You do not need to survey 201 lenders. Three quotes, compared on the same five numbers, will beat 90% of borrowers’ outcomes. For each lender, get these in writing — not from the ad, from the disclosure or the loan officer’s written quote:
- Margin. The number added to prime after any intro period. This is the single most important figure. Below prime is good; prime plus zero is fine; prime plus 1 or more needs a reason (high CLTV, lower credit score, or a genuinely valuable feature like a long fixed-rate lock option).
- Intro rate and intro length. How low, and for how many months? Six months is standard. If the intro rate applies only to an initial draw, or only up to a certain balance, that changes the math — ask.
- Floor and lifetime cap. Floor (median 3.99% in the survey) and cap (commonly 18%). The floor tells you your best case in a falling-rate world; the cap tells you your worst case in a rising one.
- Draw and repayment periods. Ten years draw / ten to twenty years repayment is typical. The repayment period is where the payment shock lives: a $50,000 balance that cost $291.67 a month interest-only at 7.00% becomes roughly $570 a month over a 10-year repayment at the same rate. Ask for the repayment-period payment in writing, not just the draw-period one.
- Fees and CLTV ceiling. Annual fees (commonly $50 to $75, often waived the first year), closing costs and any clawback if you close the line early (PNC, for example, claws back closing costs within 36 months), and the maximum CLTV — typically 80% to 85%, with some credit unions reaching 90% to 95% for strong profiles. A lender offering a slightly worse margin at 90% CLTV may be worth more to you than a lender offering prime minus 1 at 80% if you need the larger line. Get both numbers from every lender, not just the rate.
Then do the comparison the honest way: price all three quotes at the same prime rate (today’s 7.00%), at the same balance, in month seven — after every teaser has expired. The cheapest month-seven quote usually wins, and if two are close, the one with the lower floor and the longer draw period usually wins the tiebreak.
One more shopping note from the survey data: credit unions dominate the below-prime end of the table. That is not a coincidence — credit unions price to members, not shareholders, and they are overrepresented among the prime-minus-1 quotes. If your bank’s quote is prime plus 1 and your local credit union’s is prime minus 0.5, that 1.5-point gap is $750 a year on $50,000. Membership is usually open to anyone in a geographic area or employer group, and joining is often free or a $5 deposit. It is worth a phone call before you sign with your bank out of habit.
When a HELOC is the wrong tool, even at a good margin
A good margin does not make a HELOC right for every job. Because the rate is variable, a HELOC is a poor fit for a fixed, one-time expense you will repay slowly — a $40,000 kitchen remodel you plan to pay off over 15 years, for example, where a fixed-rate home equity loan locks the cost and removes the Fed from your budget. It is also a poor fit for anything you cannot afford to repay if your home’s value falls: lenders can freeze or reduce a line if values drop, which is exactly when you might most want the money. And the repayment-period payment shock catches real people every year — borrowers who budgeted the interest-only payment for a decade and then face a payment nearly double when principal kicks in.
The HELOC shines for flexible, phased spending: a multi-stage renovation where you draw as contractors bill, a bridge between selling one home and buying another, or a standby emergency line you may never draw (in which case the annual fee, not the margin, is your real cost — shop for a no-annual-fee line). Match the tool to the job first, then shop the margin. A prime-minus-1 HELOC used for the wrong purpose is still the wrong loan.
Also, a brief word on the draw-period trap I see in almost every “how much can I borrow” calculator: your borrowing power is not your equity. It is your lender’s CLTV ceiling minus everything you still owe. On a $400,000 home with $250,000 owed, an 80% ceiling gives you a $70,000 line; a 90% ceiling gives you $110,000. That $40,000 swing is decided by which lender you ask and what your credit score is — which is why the checklist above asks for the CLTV ceiling alongside the margin, every time.
The bottom line
Forget the advertised rate. It is a teaser, or a snapshot of prime on a good day, or both. The five numbers that decide what you pay are the margin, the intro length, the floor, the cap, and the CLTV ceiling — and of those, the margin matters most, because it is the only one that follows you for the entire life of the line. At today’s prime of 7.00%, the November 2026 survey says the typical fully-disclosed HELOC costs exactly prime, the best cost prime minus 1.25, and the worst cost prime plus 3.25. That spread is worth thousands of dollars a year on a real balance. Get three quotes, compare them in month seven at the same prime rate, and let the margin — not the ad — pick your lender.
This article is educational, not professional financial advice. HELOC terms vary by lender, credit profile, and property; verify current rates, margins, floors, and fees with each lender before applying, and check the CFPB’s home-equity guidance if you are comparing a HELOC with a fixed-rate home equity loan.
Frequently Asked Questions
What is a HELOC margin?
The fixed markup a lender adds to the prime rate to set your HELOC rate. If prime is 7.00% and your margin is prime plus 0.50%, your rate is 7.50%. The margin stays fixed for the life of the line; prime moves with the Fed.
What is the prime rate right now?
7.00% as of late October 2026, according to the Federal Reserve’s H.15 release and lender rate tables. Prime generally sits three points above the top of the federal funds target range, which was 3.75% to 4.00% after the Fed’s October 2026 decision.
What is a typical HELOC margin in November 2026?
The median margin in a November 2026 survey of 271 HELOCs is prime plus zero, with a range from prime minus 1.25 to prime plus 3.25. About 37% of quotes price below prime, and 61% carry a rate floor (median 3.99%). Your margin depends on your credit score and combined loan-to-value ratio.
Why is my HELOC rate higher than the advertised rate?
The advertised rate is usually an introductory teaser — often fixed for six months — or a snapshot that assumes the best credit and lowest CLTV. After the intro period, your rate becomes prime plus your margin, which is almost always higher than the teaser. Always ask for the month-seven rate.
What is a HELOC rate floor, and why does it matter?
The floor is the lowest your rate can go, regardless of how far prime falls. A 3.99% floor means that even if prime plus your margin would be 3.00%, you pay 3.99%. Floors only matter when rates fall, which is exactly when borrowers expect their payment to drop.
Is a HELOC better than a home equity loan?
It depends on the job. A HELOC suits flexible, phased borrowing (renovations drawn over time, a standby emergency line) because you pay interest only on what you draw. A fixed-rate home equity loan suits a one-time expense repaid over a set term, because the rate cannot rise. Compare both, and budget for the HELOC’s repayment-period payment, not just the interest-only draw payment.
Sources and further reading: the November 2026 margin survey at Your Best Loan Rates, the national average and lender comparison at WiseMoneyLife, and our earlier coverage of mortgage credit changes at Help Me Boss and of what the Fed’s next rate move means for your money at Help Me Boss. For the official consumer guide, see the CFPB’s home equity resources at consumerfinance.gov.