A secured line of credit is revolving credit backed by an asset you pledge — usually your home, a brokerage account, or business property — that gives you a reusable borrowing limit at lower rates than an unsecured line, with the lender able to seize the collateral if you stop paying. You draw what you need up to the limit, pay interest only on what you’ve actually borrowed, repay it, and the available balance refills.
How It Works
Think of it as a credit card tied to a specific asset. Unlike a traditional loan that hands you a lump sum, a secured line gives you access to a pool of money you can tap repeatedly during a set window.
The collateral is what separates this from an unsecured arrangement. You pledge an asset and the lender places a legal claim on it. If you stop making payments, the lender can seize and sell that asset to recover what you owe.1Legal Information Institute. Collateral That guarantee is what justifies the better terms. The lender isn’t relying solely on your promise to repay; it has a fallback.
Your credit limit depends on two things: 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 a bigger cushion if the asset loses value or costs money to liquidate, which is why volatile or hard-to-sell assets get lower advance rates.
What You Can Pledge
The type of asset shapes both your limit and your rate.
For Consumers
The most common secured line for consumers is a home equity line of credit (HELOC), where your home’s equity serves as collateral. Lenders combine the HELOC with your existing mortgage balance and typically cap the total at 80% to 85% of your home’s appraised value, though some go higher.
Liquid financial assets work too. Certificates of deposit, savings accounts, and investment portfolios can all back a line. When the collateral is a brokerage account, the arrangement is called a securities-backed line of credit (SBLOC). The lender places a hold on the account but you retain ownership and, in most cases, continue earning dividends or interest. The advance rate on liquid securities tends to be generous because the lender can sell them quickly if needed.
The catch with securities-backed lines is market risk. If the value of your pledged investments drops below the lender’s required threshold, you’ll face a maintenance call, meaning a demand to either deposit additional assets or repay part of the loan within a few days. If you can’t meet the call, the lender can sell your securities without your permission to cover the shortfall.2FINRA. Securities-Backed Lines of Credit Explained That can force you to liquidate during a downturn.
For Businesses
Businesses have a wider range of pledgeable assets. Commercial real estate, heavy equipment, vehicles, accounts receivable, and inventory are all common. Advance rates vary sharply by asset type. Accounts receivable, because they represent money already owed to the business, might get 70% to 90% of face value. Raw inventory or specialized equipment, which is harder to move quickly, often gets a more conservative 50% to 60%. Those ranges shift based on the industry, the quality of the receivables, and how easily the lender could resell the equipment.
How Interest and Payments Work
Most secured lines carry variable rates that move with a benchmark. For HELOCs, the benchmark is usually the prime rate, and your actual rate equals prime plus a fixed margin the lender sets when you open the account. If the prime rate is 7.5% and your margin is 0.5%, you’re paying 8%. When prime rises, so does your payment.
Federal regulations require that variable-rate HELOCs include rate caps to protect you from unlimited increases. A periodic cap limits how much the rate can jump at each adjustment, often one or two percentage points. A lifetime cap limits the total increase over the life of the line, most commonly five percentage points above the initial rate.3Consumer Financial Protection Bureau. What Are Rate Caps With an Adjustable-Rate Mortgage (ARM), and How Do They Work? Before you sign, the lender must disclose the maximum rate your line can reach and what your minimum payment would look like at that rate.4Consumer Financial Protection Bureau. 12 CFR 1026.40 – Requirements for Home Equity Plans
Draw Period
Most secured lines have a draw period, commonly five to ten years for HELOCs, during which you can borrow and repay freely. Many lenders require only interest payments during this phase. That keeps monthly costs low but means you’re not reducing the principal balance. Comfortable in the moment. It sets up a payment jump later.
Repayment Period
When the draw period ends, you enter repayment. New draws stop, and your payments now cover both principal and interest. The monthly bill can rise sharply, sometimes doubling or more, because you’re suddenly amortizing the full balance you built up during the draw years.
Some secured lines include a balloon payment at the end, meaning the regular repayment-period payments won’t fully retire the debt. Whatever principal remains comes due as a single lump sum. Borrowers who plan to refinance or sell the asset before that date can get caught if interest rates have risen or property values have fallen. If you can’t cover the balloon, the lender can seize the collateral. Commercial lines are more likely to amortize as a fixed percentage of the outstanding balance without a balloon, but terms vary, so read the repayment schedule before you sign.
How You Qualify
Approval involves two parallel reviews: your ability to repay and the quality of your collateral. Neither one alone is enough.
Consumer applicants need a credit check and documentation of income. The lender will calculate your debt-to-income ratio to confirm you can handle the payments alongside existing obligations. Higher credit scores unlock better rates and higher limits, though the collateral softens the credit-score requirement compared to unsecured borrowing. Business applicants face a deeper review, typically providing profit and loss statements, balance sheets, and federal tax returns so the lender can assess profitability and coverage of fixed obligations.
For real estate, the lender will order a professional appraisal to establish current market value and a title search to check for existing liens or ownership disputes. For business assets like 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 is worth on a good day.
Fees to Expect
The interest rate isn’t your only cost. Secured lines carry upfront, ongoing, and sometimes exit fees:
- Origination fee, a one-time charge to process the application, either a percentage of the credit line or a flat amount.
- Appraisal fee for real estate-secured lines, generally a few hundred dollars.
- 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 some lenders charge just to keep the line open.
- Inactivity fees, particularly on HELOCs, if you don’t draw on the line for an extended period.
Early termination penalties deserve special attention. Many lenders charge a fee if you close the line within the first two to three years, either a flat amount or a percentage of the credit limit. If you might refinance or sell the property soon, ask about this before you sign. After the initial window, the penalty usually disappears.
Federal rules require lenders to disclose all fees and third-party costs before you commit to a HELOC. If a disclosed term changes before the plan opens and you decide not to proceed, you’re entitled to a refund of all application fees.4Consumer Financial Protection Bureau. 12 CFR 1026.40 – Requirements for Home Equity Plans
Secured vs. Unsecured Lines
The interest rate gap between secured and unsecured lines is substantial. Pledging collateral can shave several percentage points off your rate because the lender’s risk drops. A HELOC backed by significant home equity will carry a much lower rate than a personal line of credit based purely on your income and credit score.
Credit limits follow the same pattern. A HELOC can reach into the hundreds of thousands of dollars because it’s backed by real property. Unsecured personal lines are capped far lower, since the lender has no fallback asset. Qualification is generally easier with collateral in the picture; a borrower with a middling credit score can still land reasonable terms if the pledged asset is valuable and liquid.
The tradeoff is real. Default on an unsecured line and you’ll face credit damage and collection calls, but nobody takes your house. Default on a secured line and the lender has the legal right to seize whatever you pledged.1Legal Information Institute. Collateral That’s a different kind of risk, and it deserves serious consideration before you sign.
Interest Deductibility
How much of your interest is deductible depends on how you use the money.
Interest paid on a business line of credit is generally deductible as a business expense if you use the funds for ordinary business purposes.5U.S. Small Business Administration. 5 Tax Rules for Deducting Interest Payments Federal tax law allows a deduction for interest paid on business indebtedness.6Office 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.
HELOCs are where people get tripped up. HELOC interest is only deductible 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.7IRS. Publication 936 (2025) – Home Mortgage Interest Deduction This rule took effect for tax years beginning after 2017.6Office of the Law Revision Counsel. 26 USC 163 – Interest Many borrowers open a HELOC specifically to consolidate higher-rate debt, then assume the interest is deductible because it’s “mortgage interest.” It isn’t.
Risks That Catch People Off Guard
Seizure and Deficiency Judgments
If you default, the lender can take and sell your collateral. The risk doesn’t necessarily end there. If the sale doesn’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.8Legal 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 other property you own. Some states restrict or prohibit deficiency judgments after a primary home foreclosure, but those protections often don’t extend to home equity loans. Check your state’s law before assuming you’re protected.
Line Freezes and Reductions
Your approved credit limit isn’t guaranteed for the life of the line. Federal regulations allow HELOC lenders to freeze your line or reduce your limit under several conditions, including a significant decline in your home’s value, a material change in your financial circumstances, or a default on any material obligation under the agreement.4Consumer Financial Protection Bureau. 12 CFR 1026.40 – Requirements for Home Equity Plans A “significant decline” in property value is generally treated as a drop that cuts the original equity cushion by 50% or more, though individual circumstances can trigger a freeze at smaller declines. The lender must reinstate your credit privileges once the condition that caused the freeze no longer exists, and it cannot charge a reinstatement fee. If you’re counting on that credit line as an emergency fund, a freeze during a recession — exactly when you’re most likely to need the money — can leave you stranded.
Maintenance Calls on Investment-Backed Lines
If you’ve pledged a brokerage or investment account, a market downturn can trigger a maintenance call requiring you to deposit additional collateral or repay part of the loan within two to three days. If you can’t meet the call, the lender can liquidate your securities to satisfy it, and it 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 Clauses
Some lenders, credit unions in particular, include cross-collateralization clauses in their loan agreements. These allow the lender to use one pledged asset as collateral for multiple debts. You might finance a car through your credit union, then later open a credit card with the same institution, and the fine print ties both debts to the vehicle. The problem surfaces when you try to sell or trade in the car: the lender won’t release the title until all cross-collateralized debts are settled. Read loan agreements carefully for this language, especially when you hold multiple products with the same institution.