What is Prime Minus 1 on a Home Equity Line of Credit or HELOC?

prime heloc

The Wall Street Journal Prime Rate is the benchmark interest rate major U.S. banks extend to their most financially qualified borrowers, conventionally set at 3 percentage points above the upper bound of the Federal Reserve’s federal funds target.

As of July 2026, the prime rate stands at 6.75%. The Federal Reserve has held the federal funds target at 3.50%–3.75% through four consecutive meetings, most recently on June 17, 2026, following its three rate cuts in late 2025. Prime has not moved since.

When a HELOC carries a “prime minus 1” pricing structure, your variable rate is calculated at exactly 1 percentage point below prevailing prime — producing a current APR of 5.75%.

How rare is prime minus 1 right now?

Worth understanding before you go looking for it. The national average HELOC rate is 7.43% as of July 22, 2026, according to Bankrate’s survey of the ten largest banks and thrifts, and 7.23% per Curinos for borrowers with 780+ credit under 70% CLTV. Measured against prime, that means the typical HELOC today prices at prime plus roughly 0.5 to 0.7 percentage points — not prime minus anything.

A true prime-minus-1 rate of 5.75% would sit about 1.7 percentage points below the national average. Offers at that level do exist, but they are typically:

  • Introductory promotional rates lasting 6 to 12 months before reverting to a standard margin
  • Credit union member specials, often with relationship or direct-deposit requirements
  • Reserved for exceptional profiles — high credit, low CLTV, large line amounts

Always confirm whether a prime-minus quote is promotional or permanent, and what the rate reverts to. The reversion margin matters far more over a 20-year HELOC than the first six months of discounted pricing.

How the variable rate mechanism works

Your HELOC rate adjusts automatically when the Federal Reserve changes policy — falling when the Fed cuts, rising when it hikes, typically repricing within one to two billing cycles. Because prime moves only when the Fed moves, your rate will hold steady until then.

Lenders build boundaries into HELOC agreements to limit volatility for both sides:

  • Rate floors, commonly 2.25% to 3.99%, prevent the rate from falling below a minimum. At today’s prime, a prime-minus-1 rate of 5.75% sits well above any typical floor, so floors are not currently binding.
  • Lifetime caps, generally 18% to 21%, limit how high the rate can climb regardless of conditions.

On direction: the Fed’s June 2026 projections put the median year-end federal funds rate near 3.8%, with more participants forecasting a hike than a cut. A variable-rate HELOC taken today is unlikely to reprice downward in the near term.

Benefits

  • Lower rate than a standard HELOC. At 5.75%, prime minus 1 runs roughly 1.7 points below the 7.43% national average — on a $50,000 balance, about $70 less per month in interest-only payments.
  • Flexibility. Borrow only what you need and pay interest solely on the drawn balance.
  • Versatility. Funds can be applied to nearly any purpose, unlike more restricted second mortgage loan uses.
  • Possible tax deduction — with an important limit. Interest is deductible only when proceeds are used to buy, build, or substantially improve the home securing the loan. The Tax Cuts and Jobs Act eliminated the deduction for other uses, and the One Big Beautiful Bill Act made that restriction permanent in July 2025. Debt consolidation, tuition, and vehicle purchases do not qualify. Consult a tax professional.

Risks

  • Rate increases. Variable rates rise with Fed hikes, and current Fed projections lean toward holds or a hike rather than cuts.
  • Promotional expiration. If your prime-minus-1 rate is introductory, the reversion can add 1.5 points or more overnight. Know the post-promotional margin before signing.
  • Foreclosure risk. A HELOC is secured by your home. Default can result in losing it.
  • Fees. Closing costs, annual fees, inactivity fees, and early termination penalties are common — a lender offering an unusually low margin may recover it in fees.
  • Eligibility. Prime-minus pricing generally requires 740+ credit, debt-to-income at or below 36%, and low combined loan-to-value. Most applicants will not qualify.

Unlike a traditional second mortgage, a HELOC offers a revolving line of credit, allowing borrowers to draw funds as needed up to a set limit and pay interest only on the amount used. A home equity line of credit with a “prime minus 1” interest rate is particularly attractive due to its potential for lower borrowing costs. The RefiGuide published this article to explain what a home equity line of credit prime minus 1 means and listed a few of the top lenders offering prime HELOC rates in 2026. We listed a few of the top lenders offering prime home equity line of credit rates. this rate in 2026, presents three case studies, and provides references for further exploration.

HELOC Lenders Offering Prime Minus 1 in July 2026

A prime minus 1 home equity line of credit represents exceptional value but remains difficult to find. Most lenders reserve this pricing for their strongest applicants — typically credit scores of 740 or higher, combined loan-to-value at or below 80%, and often an existing banking relationship. The programs below were verified against current lender disclosures as of July 2026. Note carefully which offers are ongoing and which are introductory; the difference over a 20-year line is far larger than the first year of discounted pricing.

Lender APR (July 2026) Ongoing or Intro Closing Costs Program Details
Central One Federal Credit Union
Massachusetts		 5.75%
Prime − 1.00%
Floor 3.25% · Max 17.50%		 Ongoing Waived for Worcester County properties on lines ≤$250,000 (appraisal and title search still apply) Rate adjusts only once per year on the account anniversary, even if prime rises. Up to 80% of appraised value less first mortgage, or 70% of tax-assessed value. $7,500 minimum line. Terms up to 30 years. Owner-occupied or second home. Membership required.
Commonwealth Credit Union
Kentucky & Indiana		 5.75%
Prime − 1.00%
Floor 4.00% · Max 18.00%		 Ongoing $0 closing cost. Costs repayable if the line is closed or refinanced within 24 months. Variable for the first 10 years, fixed thereafter. Rate adjusts quarterly to WSJ Prime. 10-year draw, 15-year repayment. Primary residences only. Lines from $5,000 to $400,000. Membership required.
Truist
National		 5.24%
Prime − 1.51%
9-month intro		 Introductory
(9 months)		 Varies; contact lender The lowest verified prime-minus offer available. Reverts to a standard margin after nine months — confirm the post-promotional rate before applying. Excellent credit required.
Seneca Savings
New York		 5.75%
Prime − 1.00%
12-month intro		 Introductory
(12 months)		 $320–$5,690 estimated; waived if the line is maintained for three years New home equity lines only — refinances of existing lines do not qualify. Longest introductory window of the verified offers.

Important Notes

  • Wall Street Journal Prime Rate: 6.75% as of July 29, 2026, making prime minus 1 equal to 5.75% APR. Prime has held at 6.75% since December 2025, and the Federal Reserve has kept the federal funds target at 3.50%–3.75% through four consecutive meetings, most recently June 17, 2026.
  • Context for how good these rates are: the national average HELOC rate is 7.43% (Bankrate, July 22, 2026). A 5.75% prime-minus-1 rate runs about 1.7 percentage points below average — on a $50,000 balance, roughly $70 per month less in interest-only payments.
  • Rate floors are not currently binding. At 5.75%, every floor listed above (3.25% to 4.00%) sits well below the current rate. Floors matter only if prime falls substantially — and the Fed’s June 2026 projections show more policymakers expecting a hike than a cut.
  • Ask what the rate reverts to. For introductory offers, the permanent margin matters far more than the promotional rate. A nine-month teaser that reverts to prime plus 1.00% costs more over a 20-year line than an ongoing prime minus 0.25%.
  • Additional regional credit unions and community banks frequently match or beat these rates for well-qualified members, particularly those with existing relationships and direct deposit.
  • Always verify current rates directly with lenders. Promotional terms change based on market conditions, creditworthiness, geography, and membership eligibility.
  • The most aggressive pricing is generally reserved for HELOCs at 70% CLTV or below.

HELOC Prime Rate Calculation FAQ

How is my HELOC interest rate calculated using the prime rate?

HELOC rates are calculated by adding or subtracting a margin from the Wall Street Journal Prime Rate, which stands at 6.75% as of July 2026 and has held there since December 2025. The margin is your lender’s pricing adjustment based on creditworthiness, CLTV, and loan terms.

For example, prime minus 1% equals 5.75% (6.75% − 1.00%), while prime plus 0.50% equals 7.25% (6.75% + 0.50%). Your rate adjusts automatically when the Federal Reserve changes policy, typically within one billing cycle — though some lenders adjust only quarterly or annually, so check your agreement.

Most HELOCs include rate floors preventing the rate from dropping below a minimum (commonly 2.25% to 4.00%) and lifetime caps limiting the maximum (typically 17.5% to 21%).

Monthly interest equals your outstanding balance multiplied by your rate, divided by 12. Example: a $50,000 balance at 5.75% costs $239.58 per month ($50,000 × 0.0575 ÷ 12). For context, the same balance at the current national average HELOC rate of 7.43% would cost $309.58 — a difference of $70 per month.

Check your agreement’s index definition. Some lenders use alternative indices such as SOFR, though WSJ Prime remains the standard for home equity lines.

Why do some lenders offer prime minus 1 while others charge prime plus 2 or higher?

The gap between prime minus 1 (5.75%) and prime plus 2 (8.75%) is three full percentage points — roughly $125 per month on a $50,000 balance. The difference comes down to business model, funding costs, and target customer.

Credit unions frequently price below prime because they operate as non-profit cooperatives that return earnings to members through lower rates and fees, pay no federal income tax, and prioritize member relationships over profit maximization. Banks charging prime-plus margins must generate shareholder returns, cover branch network overhead, and price for default risk across broader customer bases.

Borrower profile drives much of the rest. Prime-minus lenders target exceptional applicants — 740+ credit, 20%+ remaining equity, stable documented income — where risk is minimal. Higher-margin lenders accept wider profiles, often 680+ scores at 15% equity, and price accordingly.

Context worth knowing: the national average HELOC rate is 7.43% as of July 22, 2026, which works out to roughly prime plus 0.68%. The market as a whole prices at prime plus, not prime minus. A genuine prime-minus offer is an outlier, not a baseline.

And check whether it’s permanent. Many prime-minus offers are introductory. Truist currently advertises prime minus 1.51% — a 5.24% APR — but only for the first nine months, after which it reverts to a standard margin. Seneca Savings runs a 12-month introductory prime minus 1%. By contrast, Central One and Commonwealth Credit Union advertise prime minus 1% as ongoing pricing. Over a 20-year line, the permanent margin matters far more than the teaser.

Geographic competition also matters: markets with numerous credit unions see more aggressive HELOC pricing than those dominated by large banks. Always compare total cost — closing fees, annual fees, inactivity fees, and adjustment caps — not just the headline margin.

What happens to my prime minus 1 HELOC rate when the Federal Reserve changes interest rates?

When the Fed raises or lowers the federal funds rate, the Wall Street Journal Prime Rate moves by the same amount, and your HELOC rate follows within 1 to 2 billing cycles.

If the Fed cuts 0.25%: prime falls from 6.75% to 6.50%, taking your prime-minus-1 rate from 5.75% to 5.50% — saving roughly $10.42 per month per $50,000 borrowed.

If the Fed hikes 0.50%: prime rises to 7.25%, pushing your rate to 6.25% and adding about $20.83 per month on a $50,000 balance.

Current direction matters here. The Fed has held the federal funds target at 3.50%–3.75% through four consecutive meetings, most recently June 17, 2026. Its June projections put the median 2026 year-end rate near 3.8%, with more policymakers forecasting a hike than a cut. A variable-rate HELOC opened today is more likely to reprice upward than downward in the near term — the opposite of the assumption most rate content still carries.

Your agreement specifies exact timing. Some lenders adjust within days of a prime change, others quarterly, and some — like Central One — adjust only once per year on the account anniversary, even if prime rises in between. That annual reset is a meaningful advantage in a rising-rate environment and a disadvantage in a falling one.

Rate floors protect lenders when rates fall, stopping your rate at a minimum even if the formula calculates lower. At today’s prime, floors are not remotely binding: with prime minus 1 at 5.75%, prime would have to fall to 4.25% before a 3.25% floor engaged — ten consecutive quarter-point cuts. A 4.00% floor would require prime at 5.00%, or seven cuts.

Lifetime caps protect you, typically limiting rates to 17.5% to 21% regardless of where prime goes.

Monitor Federal Reserve announcements to anticipate payment changes, and ask your lender whether a fixed-rate conversion option is available if you expect rates to climb.

Case Study 1: Kitchen Renovation

Borrower: Jane Doe, a homeowner with a 780 FICO score and 30% home equity.

Scenario: Jane needed $50,000 to renovate her outdated kitchen. She secured a HELOC from Energy Credit Union at prime minus 1 (6.50% APR in June 2025).

Outcome: The renovation increased her home’s value by $75,000, per a local appraisal. The low rate kept monthly interest payments affordable (approximately $270 for $50,000), and the flexible draw period allowed her to manage costs effectively. Jane plans to repay the balance quickly to minimize interest.

Case Study 2: Debt Consolidation

Borrower: John Smith, with a 760 FICO score and $100,000 in equity.

Scenario: John had $30,000 in credit card debt at 18% interest. He obtained a HELOC from Central One Federal Credit Union at prime minus 1 (6.50% APR).

Outcome: Consolidating the debt reduced his monthly interest from $450 to $162.50, saving over $3,500 annually. The no-closing-cost HELOC loan option for his $200,000 home in Worcester County minimized upfront expenses, allowing John to pay down the principal faster.

Case Study 3: College Tuition

Borrower: Emily Johnson, a parent with a 750 FICO score and 25% equity.

Scenario: Emily needed $40,000 for her child’s college tuition. She chose a HELOC from Landmark Credit Union at prime minus 1 (6.50% APR).

Outcome: The HELOC’s flexibility enabled her to draw funds each semester, paying an interest only payment on the used amount (e.g., $108.33 monthly for $20,000 drawn). The low rate and no annual fees made it more affordable than private student loans, and Emily could repay early without pre-payment penalties.

Advice for Borrowers Seeking Prime Rate HELOCs

To secure a prime minus 1 HELOC loan:

  • Check Credit and Equity: Ensure a FICO score of 740+ and at least 15–20% equity.

  • Compare HELOC Lenders: Obtain quotes from at least three lenders, focusing on interest rates, fees, and terms (Bankrate HELOC Tips).

  • Understand Terms: Verify floor/ceiling rates and adjustment frequency (e.g., monthly or annually).

  • Assess Risks: Plan for potential rate increases and ensure repayment affordability to avoid foreclosure. (consider converting a variable rate into a fixed rate HELOC when the interest rates decline.)

  • Consult Advisors: Discuss with financial and tax advisors to align the HELOC with your goals.

A HELOC at prime minus 1 offers significant savings for homeowners seeking to leverage their home equity, with a current rate of 6.50% APR based on the 7.50% prime rate in June 2025. While only a few of the top HELOC lenders, such as Energy Credit Union and Central One Federal Credit Union, explicitly offer this HELOC interest rate, local credit unions and community banks may provide similar deals for qualified borrowers. The case studies demonstrate the versatility of these HELOCs for home remodeling, consolidating debt, and education expenses. However, the variable interest rate and foreclosure risk require careful financial planning. Comparing multiple home equity line of credit lenders, banks and credit unions and understanding terms are crucial to maximizing benefits.

Key Citations

  • WSJ Prime Rate Forecast

  • Bankrate Best HELOC Rates July 2025

  • CreditUnionGuy X Post on HELOC Rates

  • Energy Credit Union Home Equity Line of Credit

  • IRS Home Equity Loan Interest Deduction

Disclosure: RefiGuide.org is an advertising marketplace, not a licensed mortgage lender or broker. Loans are matched with participating NMLS-licensed institutions.

Reviewed by: Bryan Dornan, Lending Expert (25+ years)  | Fact Checked ✓