A secured line of credit is revolving credit backed by an asset you own: you pledge collateral, the lender approves a borrowing limit, and you draw against that limit whenever you need money, paying interest only on what you actually use. Because the lender can seize the pledged asset if you default, the rate is lower and the limit is higher than what you’d get on an unsecured line. The tradeoff is real, though. Miss enough payments and the asset is gone.
How the Mechanics Work
Think of it as a credit card tied to a specific asset. Instead of a lump-sum loan, you get access to a pool of money you can tap repeatedly. Draw what you need, repay it, and the available balance refills.
The collateral is the whole reason the terms are better. You pledge something — your home, a brokerage account, business equipment — and the lender places a legal claim on it. If payments stop, the lender can take and sell that asset to recover what you owe.1Legal Information Institute. Collateral That guarantee is what justifies the lower rate. The lender isn’t relying only on your promise to repay.
Your credit limit depends on your financial health and the value of the pledged asset. Lenders use a loan-to-value (LTV) ratio to decide how much they’ll lend against the collateral’s appraised or market value. A lower LTV gives the lender more cushion if the asset loses value or is expensive to liquidate, which is why volatile or hard-to-sell assets get smaller advance rates.
What You Can Pledge
The asset drives both your limit and your rate, and the menu differs for consumers and businesses.
Home Equity
The most common consumer version is a home equity line of credit (HELOC), where your home’s equity is the collateral. Lenders combine the HELOC with your existing mortgage balance and usually cap the total at 80% to 85% of the home’s appraised value, though some go higher.
Investment Accounts
You can also pledge liquid financial assets. Certificates of deposit, savings accounts, and investment portfolios all qualify. When the collateral is a brokerage account, the arrangement is called a securities-backed line of credit (SBLOC). The lender puts a hold on the account, but you keep ownership and generally continue to earn dividends or interest. Advance rates on liquid securities tend to be generous because the lender can sell them quickly.
The catch is market risk. If your pledged investments drop below a required threshold, you’ll face a maintenance call — a demand to deposit more assets or repay part of the loan within a few days. If you can’t meet it, the lender can sell your securities without your permission.2FINRA. Securities-Backed Lines of Credit Explained That can force liquidation during a downturn, exactly the wrong moment.
Business Assets
Businesses have a wider menu: commercial real estate, heavy equipment, vehicles, accounts receivable, and inventory. Advance rates vary sharply. Receivables, because they represent money already owed by customers, might advance at 70% to 90% of face value. Raw inventory or specialized equipment, which is harder to sell quickly, often runs 50% to 60%. Industry, receivable quality, and equipment resale demand all shift those ranges.
In commercial lending, the lender files a UCC-1 financing statement with the state to publicly record its security interest. That filing establishes priority: if multiple creditors chase the same collateral, whoever filed first generally gets paid first.3Legal Information Institute. UCC Financing Statement Filing is what perfects most security interests.4Legal Information Institute. UCC 9-310 – When Filing Required to Perfect Security Interest
How the Interest Rate Is Set
Most secured lines carry variable rates that move with a benchmark index. For HELOCs, the benchmark is usually the prime rate. Your actual rate equals prime plus a fixed margin the lender assigns when you open the account. If prime is 7.5% and your margin is 0.5%, you pay 8%. When prime rises, your payment rises with it.
Federal rules require variable-rate HELOCs to include rate caps that protect you from unlimited increases. A periodic cap limits how much the rate can jump at each adjustment; one or two percentage points is typical. A lifetime cap limits the total increase over the life of the line, most commonly five percentage points above the initial rate.5Consumer Financial Protection Bureau. What Are Rate Caps With an Adjustable-Rate Mortgage (ARM), and How Do They Work? Before you sign, the lender must tell you the maximum rate the line can reach and what the minimum payment would be at that rate.6Consumer Financial Protection Bureau. 12 CFR 1026.40 – Requirements for Home Equity Plans
Fees and Costs Beyond Interest
Secured lines carry upfront, ongoing, and sometimes exit fees. The common categories:
- Origination fee to process the application, either a percentage of the credit line or a flat amount.
- Appraisal fee on real estate collateral, generally a few hundred dollars depending on the property.
- Title search and title insurance to verify clear ownership and protect against undiscovered claims.
- Recording and notary fees for filing the lien on real property.
- Annual or maintenance fees charged simply to keep the line open.
- Inactivity fees, especially on HELOCs, if you don’t draw on the line for a stretch.
Early termination penalties deserve attention. Many lenders charge a fee if you close the line within the first two or three years, either a flat amount or a percentage of the limit. If you might refinance or sell the property soon, ask about this before signing. After the initial window, the penalty usually falls away.
Federal rules require lenders to disclose all fees and third-party costs before you commit to a HELOC. If any disclosed term changes before the plan opens and you decide not to proceed, you’re entitled to a refund of your application fees.6Consumer Financial Protection Bureau. 12 CFR 1026.40 – Requirements for Home Equity Plans
Drawing and Repaying
Once approved, you access funds through special checks, electronic transfers, or a designated card, depending on what the lender provides. You can draw any amount up to your available limit at any point during the draw period.
The Draw Period
Most secured lines have a draw period, typically five to ten years for HELOCs, during which you can borrow and repay freely. Many lenders require interest-only payments during this phase, which keeps monthly costs low but leaves the principal untouched. It feels comfortable, and it sets up a much larger payment later.
The Repayment Period
When the draw period ends, the repayment phase begins. New draws stop, and payments cover both principal and interest. The monthly bill can jump sharply, sometimes doubling or more, because you’re now amortizing the full balance you accumulated.
Some secured lines end with a balloon payment: the regular repayment-period installments don’t fully retire the debt, and whatever principal remains comes due as a single lump sum. Borrowers who plan to refinance or sell before that date can get caught if rates have risen or property values have dropped. If you can’t cover the balloon, the lender can seize the collateral.
Commercial lines more often repay as a fixed percentage of the outstanding balance, which amortizes the debt gradually without a balloon. Terms vary by lender, so read the repayment schedule before you sign, not after.
How Interest Is Taxed
Whether you can deduct the interest depends on how you use the money.
Business Use
Interest on a business line of credit is generally deductible as a business expense when the funds are used for ordinary business purposes.7U.S. Small Business Administration. 5 Tax Rules for Deducting Interest Payments Federal tax law allows a deduction for interest paid on business indebtedness.8Office of the Law Revision Counsel. 26 USC 163 – Interest Small businesses below the gross receipts threshold are exempt from the business interest limitation that restricts deductions for larger companies.
HELOC Use
This is where people trip up. HELOC interest is deductible only if you use the borrowed funds to buy, build, or substantially improve the home that secures the line. Use the money for anything else — consolidating credit card debt, paying tuition, covering medical bills — and the interest is not deductible, no matter how the loan is structured.9IRS. Publication 936 (2025) – Home Mortgage Interest Deduction The rule took effect for tax years beginning after 2017 and eliminated the deduction for home equity indebtedness not tied to acquiring or improving the residence.8Office of the Law Revision Counsel. 26 USC 163 – Interest
Many borrowers open a HELOC to consolidate higher-rate debt and assume the interest is deductible because it’s “mortgage interest.” It isn’t. Only the portion spent on qualifying home improvements generates a deduction.
Risks That Come With Pledging Collateral
A secured line is a useful tool, but borrowing against your assets creates risks that don’t exist with unsecured debt.
Seizure and Deficiency Judgments
If you default, the lender can take and sell your collateral. Under the Uniform Commercial Code, a secured party can repossess collateral after default through the courts or through self-help, so long as it doesn’t breach the peace. The risk doesn’t necessarily end at the sale. If the proceeds don’t cover the full outstanding balance, you may still owe the difference; the borrower is liable for any deficiency remaining after the lender applies the sale proceeds to the debt.10Legal Information Institute. UCC 9-615 – Application of Proceeds of Disposition
With a deficiency judgment, the lender can pursue collection through wage garnishment, bank levies, or liens on your other property. Some states limit or prohibit deficiency judgments after a primary home foreclosure, but those protections often don’t extend to home equity loans. Rules vary by state.
Credit Line Freezes and Reductions
Your approved limit isn’t guaranteed. Federal regulations let HELOC lenders freeze the line or reduce the limit when a home’s value declines significantly, when your financial circumstances change materially, or when you default on any material obligation under the agreement.6Consumer Financial Protection Bureau. 12 CFR 1026.40 – Requirements for Home Equity Plans
A “significant decline” in property value is generally defined as a drop that reduces the original equity cushion by 50% or more, though individual situations can trigger a freeze at smaller declines. The lender must reinstate your credit privileges once the triggering condition no longer exists, and it cannot charge a reinstatement fee.6Consumer Financial Protection Bureau. 12 CFR 1026.40 – Requirements for Home Equity Plans If you were counting on the line as an emergency fund, a freeze during a recession — when you’re most likely to need it — can leave you stranded.
Maintenance Calls on Investment Collateral
With a securities-backed line, a market drop can trigger a maintenance call requiring you to deposit more collateral or repay part of the loan within two to three days. If you can’t meet it, the lender can liquidate your securities to cover the shortfall, and doesn’t need your permission.2FINRA. Securities-Backed Lines of Credit Explained Some agreements also let the lender raise the required collateral percentage at any time, which can trigger a call even without a market drop.
Cross-Collateralization
Some lenders, credit unions in particular, include cross-collateralization clauses that let them use one pledged asset as collateral for multiple debts. You might finance a car through your credit union, later open a credit card with the same institution, and find both debts tied to the vehicle. The problem shows up when you try to sell or trade in the car: the lender won’t release the title until every cross-collateralized debt is settled. Read the loan agreement carefully for this language, especially if you hold several products at one institution.
Qualifying
Approval runs on two tracks: your ability to repay and the quality of the collateral. Neither alone is enough.
Consumer applicants provide a credit check and income documentation, and the lender calculates a debt-to-income ratio to confirm you can carry the payments alongside existing obligations. Higher credit scores unlock better rates and higher limits, though pledged collateral softens the credit requirement compared to unsecured borrowing.
Business applicants face a deeper review with profit and loss statements, balance sheets, and federal tax returns for the entity, so the lender can gauge profitability and fixed-obligation coverage.
For real estate, the lender orders a professional appraisal and a title search to check for existing liens or ownership disputes. For business equipment or inventory, a third-party specialist may assess the conservative liquidation value: what the lender could realistically recover in a forced sale, not what the asset would bring on a good day.