Yes, using a HELOC to buy a second home is allowed by most lenders and is one of the more common ways homeowners turn built-up equity into another property. The line can fund a down payment on a conventional mortgage or, if your equity is large enough, cover the full purchase price. What varies is how much you can borrow, what the second property is allowed to be used for, how the interest is taxed, and how hard the repayment phase will hit your budget a decade from now. Work through those four pieces before you sign anything.
How Much You Can Actually Borrow
The ceiling comes from your combined loan-to-value ratio: all debts secured by your home divided by its appraised value. Most lenders cap CLTV at 80% to 85%. Fannie Mae’s guidelines go as high as 90% on a primary residence with subordinate financing, but individual lenders routinely set lower limits based on their own risk tolerance.1Fannie Mae. Eligibility Matrix
The math is straightforward. A home appraised at $500,000 with a $300,000 mortgage balance has $200,000 of equity. At an 80% CLTV cap, total borrowing is limited to $400,000, which leaves $100,000 available on a new credit line. Push the cap to 85% and the line grows to $125,000. That five-point spread can decide whether a second-home purchase is feasible, so shop more than one lender.
Qualifying and Applying
HELOC underwriting mirrors mortgage underwriting. The lender will want two years of tax returns, recent pay stubs or W-2s, and current mortgage statements.2Federal Trade Commission. Home Equity Loans and Home Equity Lines of Credit Credit score minimums usually start around 620, but rates improve meaningfully above 700. Debt-to-income ratios above roughly 43% draw scrutiny, and some lenders will decline outright at that point.
Property valuation is often lighter than for a purchase mortgage. Many lenders use automated valuation models or desktop appraisals pulled from public records and comparable sales, sometimes paired with an exterior-only inspection. A full appraisal, if ordered, runs $300 to $600. Expect about 30 days from application to funding, faster if you return documents promptly.
One timing detail matters if you’re coordinating with a purchase: because the HELOC is secured by your primary residence, federal law gives you three business days to cancel after closing, and the lender cannot release funds during that window.3Consumer Financial Protection Bureau. Regulation Z – 1026.23 Right of Rescission If the second-home closing is scheduled for a Monday, the HELOC needs to have cleared rescission by the previous Thursday.
How to Deploy the Funds
The most common approach is a down payment. For a $400,000 vacation property, drawing $80,000 covers the 20% down payment on a conventional mortgage, with the remaining $320,000 financed separately. Putting 20% down avoids private mortgage insurance.4Freddie Mac. The Math Behind Putting Down Less Than 20% You’ll then be carrying three obligations: your original mortgage, the HELOC, and the new mortgage on the second home.
With enough equity, you can also buy the second home outright from the HELOC and present yourself as a cash buyer. Cash offers close faster and tend to win contested bids because there’s no mortgage contingency. The downside is a large variable-rate balance against your primary home. Draw $300,000 on a $300,000 line and you’re fully exposed to whatever rates do over the next several years.
Some HELOC products include a fixed-rate conversion option that lets you lock part of your balance at a set rate. The locked rate is typically higher than the initial variable rate, but it stabilizes the payment on a large draw.5Consumer Financial Protection Bureau. What You Should Know About Home Equity Lines of Credit Not every lender offers it, so ask before signing if payment predictability matters.
What the Second Property Can Be Used For
Lenders care about what the second home will be. The rules for a vacation home are different from the rules for a rental, and the language in your HELOC agreement can quietly restrict what you planned to do.
Vacation Homes
To count as a second home rather than an investment property, most lenders require the home be suitable for year-round living and located a meaningful distance from your primary residence. The common threshold is at least 50 miles. The point of the distance rule is to prevent a borrower from calling a nearby rental a “vacation home.” Many loan agreements also contain occupancy clauses requiring personal use for part of the year.
Investment Properties
Buying primarily to rent draws tighter underwriting. Non-owner-occupied properties carry higher rates on the purchase mortgage and often lower CLTV allowances on the HELOC. Some HELOC agreements explicitly bar using the credit line for speculative real estate or commercial ventures, and violating that language gives the lender grounds to freeze the line or demand full repayment. Read the “Use of Proceeds” section of your agreement before committing to a strategy.
The IRS Personal-Use Rule
If you rent the second property at all, the IRS has its own test. You must use the home personally for more than 14 days a year, or more than 10% of the days it’s rented at fair market rates, whichever is greater.6Internal Revenue Service. Topic No. 415, Renting Residential and Vacation Property Below that threshold the IRS treats the home as a rental, which changes how income and deductions are reported and affects whether mortgage interest can be deducted as qualified residence interest.
Tax Treatment Under the 2026 Rules
The rules changed meaningfully for 2026. The Tax Cuts and Jobs Act provisions that capped the mortgage interest deduction at $750,000 of acquisition debt and eliminated the deduction for home equity interest used for non-housing purposes expired at the end of 2025. The permanent statute now governs again.7Office of the Law Revision Counsel. 26 USC 163 – Interest
For 2026, the acquisition indebtedness limit is $1,000,000 ($500,000 if married filing separately). Acquisition indebtedness is debt used to buy, build, or substantially improve a qualified residence, which covers both your primary home and one second home. Draw $200,000 from your HELOC to purchase a second home and that interest qualifies as acquisition debt, deductible as long as total acquisition debt across both properties stays under $1,000,000.7Office of the Law Revision Counsel. 26 USC 163 – Interest
The home equity interest deduction is also back. Interest on up to $100,000 of home equity debt ($50,000 if married filing separately) is deductible regardless of how the funds were used. Even a draw that went toward something other than the purchase can generate deductible interest within that ceiling. All of this requires itemizing. If your standard deduction is higher than your total itemized deductions, none of it helps.
Closing Costs and Recurring Fees
Opening a HELOC isn’t free, even where “no closing cost” offers exist, since the expenses tend to be built into a higher rate. Total closing costs generally run 2% to 5% of the credit line. On a $150,000 HELOC, that’s $3,000 to $7,500. Common items:
- Origination fee: 0.5% to 1% of the credit line
- Appraisal fee: $300 to $600, depending on valuation method
- Title search: $75 to $250
- Title insurance: 0.5% to 1% of the credit line
- Recording and notary fees: $35 to $150 combined
Beyond upfront costs, watch for recurring charges. Annual maintenance fees of a few hundred dollars show up on some products, and inactivity fees can apply if you go a year or more without a draw. Early termination fees of $200 to $500 are common if you close the account within the first two or three years. If you intend to open the line for a one-time purchase and shut it down after, build that fee into the comparison.
The Repayment Phase and Payment Shock
A HELOC has two phases, and the second one is where borrowers get caught off guard. The draw period, usually 10 years, lets you borrow and repay repeatedly, and most lenders require interest-only payments during this stretch. On a $100,000 balance at 7.5%, that’s roughly $625 a month. Manageable.
Then the repayment period starts. You can no longer borrow, and payments now include principal. Many borrowers see their monthly payment more than double overnight. If you drew heavily to buy the second home and didn’t chip away at principal during the draw period, that transition can strain the budget enough to threaten both properties. Lenders are required to disclose these payment terms upfront, including whether a balloon payment could result.8Consumer Financial Protection Bureau. Regulation Z – 1026.40 Requirements for Home Equity Plans
Variable rates compound the uncertainty. HELOC rates are tied to the prime rate plus a lender-set margin. Federal law requires that the rate be based on a publicly available index, and your agreement must disclose the maximum rate the lender can charge.8Consumer Financial Protection Bureau. Regulation Z – 1026.40 Requirements for Home Equity Plans That ceiling might be 18% or higher. A large balance carried through a rate spike can get expensive fast.
There’s also a credit score effect to plan for. A HELOC is revolving credit, so scoring models treat a large draw the way they treat high credit card utilization. A $120,000 draw on a $150,000 line pushes utilization on that account to 80% and your score will feel it. That matters directly if you’re financing the second home with a separate mortgage, because the purchase lender is pulling your credit at the same time. Pay the HELOC balance down as quickly as cash flow allows.
The Line Can Be Frozen
Here’s a risk most borrowers don’t price in: the lender can freeze or reduce your HELOC after it’s open. Federal regulations permit this when your home’s value drops significantly below the appraised value at origination, or when the lender reasonably believes your financial condition has deteriorated enough to threaten repayment.8Consumer Financial Protection Bureau. Regulation Z – 1026.40 Requirements for Home Equity Plans The regulatory threshold for a “significant decline” is roughly a 50% reduction in the equity cushion between your credit limit and available equity. Default on any material obligation under the agreement is also a trigger.
If you’re planning to use future HELOC draws to fund renovations on the second home or cover carrying costs between tenants, understand that availability isn’t guaranteed. A downturn or a job change could cut off access at exactly the wrong moment.
Alternatives Worth Comparing
A HELOC isn’t the only way to convert equity into a second property.
Home Equity Loan
A home equity loan delivers a lump sum at a fixed interest rate on a set repayment schedule, usually 5 to 30 years. The rate is locked at closing, eliminating variable-rate exposure. For a borrower who knows exactly how much is needed and wants predictable payments, this is the simpler product. The cost of that predictability is flexibility: once the money is borrowed, it’s on a fixed amortization with no option to re-borrow.
Bridge Loan
Bridge loans are short-term, usually 3 to 12 months, designed to cover the gap between buying a new property and selling the old one. Rates run about 2% to 4% above HELOC rates. The speed can be worth the premium when a situation demands it, but the short repayment window forces a sale or refinance quickly, which is only a safe bet when the exit plan is solid.
A HELOC offers the most flexibility, a home equity loan the most predictability, and a bridge loan the most speed. The collateral is identical across all three: your primary home.