You can use stocks as collateral for a loan by opening a securities-based line of credit with your brokerage or bank. The lender places a lien on the eligible securities in your account, and you draw against a revolving credit line at a variable interest rate that is usually well below what a personal loan or credit card would charge. You keep ownership of the shares, keep collecting dividends, and avoid selling anything, so no capital gains tax is triggered. The catch is that if the market drops far enough, the lender can sell your holdings to cover the loan, and it does not need your permission to do it.1https://www.finra.org/investors/insights/securities-backed-lines-credit
How a Securities-Based Loan Works
The product goes by a few names: securities-based line of credit, pledged asset line, portfolio line of credit. The mechanics are the same. You pledge stocks, bonds, or mutual fund shares held in a non-retirement brokerage account, and the lender opens a revolving line secured by those assets. You draw funds when you need them, pay interest only on the balance you carry, and repay on a flexible schedule.
You still own the pledged securities. Dividends still land in your account, and any price appreciation is still yours. The lender’s rights only activate if the value of the collateral falls too far or you fail to repay. Because the collateral is liquid and priced daily, approval is fast and paperwork is light compared with a mortgage or a business loan.
How Much You Can Borrow Against Your Portfolio
The credit line is set by a loan-to-value ratio applied to each holding. Diversified index funds and blue-chip stocks tend to get the highest LTVs, often 50% to 70% of market value. A $500,000 portfolio with a blended 60% LTV would support a $300,000 line. Single stocks get lower ratios because concentration adds risk, and volatile sectors are discounted relative to stable ones like utilities. Under the Federal Reserve’s Regulation U, the maximum loan value for margin stock is 50% of current market value, which sets the regulatory ceiling; individual lenders may go higher or lower on non-margin securities depending on their own models.2https://www.federalreserve.gov/supervisionreg/regucg.htm
The line is not a fixed number. It moves with the market value of your pledged holdings every day. If your portfolio drops 10%, so does the credit available to you, whether or not you have drawn against it.
Interest Rates and Fees
Rates are variable and generally benchmarked to the Secured Overnight Financing Rate (SOFR) plus a spread that narrows as the loan size grows. One major brokerage, for example, charges SOFR plus 3.10% on lines between $100,000 and $499,999, and SOFR plus 1.90% on lines of $3 million or more. Those rates typically beat unsecured personal loans and credit cards by a wide margin, but they move with prevailing rates for the life of the loan.
Costs beyond interest are usually minimal. Most firms charge no origination fee, no closing costs, and no appraisal, because the lender already marks the collateral to market daily. Some states charge a small filing fee for the lien, and that is typically the extent of it.
Who Can Qualify and Which Securities Can Be Pledged
Qualification is different from any other kind of borrowing. Because the loan is fully collateralized by liquid assets the lender already controls, some firms do not even run a credit check. Approval turns on the value and composition of the pledged portfolio. A common minimum account size is $100,000 in eligible securities, though some firms set the bar higher or lower.
What counts as eligible collateral is narrower than what sits in a typical brokerage account. Publicly traded stocks on major exchanges, investment-grade bonds, and shares in widely held mutual funds form the core. Broad-market ETFs get the highest LTV assignments because they are liquid and diversified. Several categories are excluded or heavily discounted:
- Restricted stock received through employee compensation plans, which carries transfer restrictions and cannot be freely sold.
- Private equity and venture capital interests, which have no readily available market price and are almost universally excluded.
- Thinly traded stocks, which may be assigned a 0% LTV because the lender could not sell them quickly without moving the price.
- Concentrated positions in a single stock, where the concentrated portion gets a reduced LTV to reflect the risk of that one company declining.
Retirement accounts cannot be pledged. Lenders also reassess eligibility on an ongoing basis. A stock that qualified last month can be reclassified if its volatility spikes or its trading volume drops, which shrinks your credit limit and may force you to deposit more assets or pay down the balance.
What You Cannot Do With the Money
One rule matters before you draw a dollar. Under Regulation U, a loan secured by stocks cannot be used to buy or carry additional securities. If a bank extends more than $100,000 in credit secured by margin stock, you have to complete a purpose statement (Form FR U-1) describing what the funds will be used for, and the officer reviewing it must accept it in good faith.2https://www.federalreserve.gov/supervisionreg/regucg.htm Lying on that form violates Regulation X and carries federal penalties.
Compliant uses are broad: real estate, funding a business, tuition, a tax bill, or any other non-securities purpose. Margin loans, which are designed for buying more securities, are a separate product governed by Regulation T.
The Tax Angle
Borrowing money is not a taxable event. Loan proceeds are not income, because you have an offsetting obligation to repay. That is the whole financial logic behind pledging an appreciated portfolio instead of selling from it. If you hold $1 million in stock with a $200,000 cost basis, selling generates roughly $800,000 in taxable gain; borrowing against it generates zero.
The interest you pay on the loan has its own rules. If you use the funds for personal purposes such as a car or a vacation, the interest is personal interest and is not deductible. If you use it for investment purposes such as buying a rental property, it qualifies as investment interest, which is deductible only up to your net investment income for the year, with any excess carried forward. Net investment income generally excludes long-term capital gains and qualified dividends unless you elect to include them and give up their preferential rates. If the proceeds go into a trade or business, the interest may be fully deductible as a business expense.
One more tax point matters if things go wrong. If the lender liquidates your securities to cover the loan, that sale is a taxable event just like any voluntary sale. Long-held appreciated shares with a low basis can produce a large capital gain and an unexpected tax bill in the same year the market decline forced the sale. If the lender sells shares at a loss and you repurchase substantially identical securities within 30 days, the wash sale rule disallows the loss for the current year and adds it to the basis of the replacement shares.
Margin Calls and Forced Liquidation
This is the risk that turns a convenient product dangerous. Every loan agreement sets a maintenance requirement: the minimum ratio of collateral value to outstanding loan balance. As long as your portfolio stays above that line, nothing happens. If it falls below, you get a maintenance call requiring you to restore the ratio by depositing cash, pledging more securities, or paying down the balance. FINRA notes that firms typically give two or three days to meet a maintenance call.1https://www.finra.org/investors/insights/securities-backed-lines-credit
Two features of these agreements catch borrowers off guard. First, the lender is not required to contact you before selling. The SEC has warned that “some investors have been shocked to find out that the brokerage firm has the right to sell their securities that were bought on margin — without any notification and potentially at a substantial loss.”3https://www.sec.gov/reportspubs/investor-publications/investorpubsmarginhtm.html The same principle applies to securities-based lines of credit. You also do not get to choose which securities are sold; the lender picks.
Second, these are demand loans. The lender can call the entire balance due at any time, for any reason, whether or not your collateral has declined. A change in the firm’s risk appetite is enough.
The worst-case scenario compounds. A market drop triggers a maintenance call. You cannot meet it, so the lender sells your holdings at depressed prices. Those forced sales lock in losses at the wrong moment and can also generate a tax bill on any shares that still carried embedded gains. You lose wealth, owe tax, and hold nothing to participate in the recovery.
Borrowing Against Stocks Without Getting Hurt
The people who run into serious trouble with these loans tend to be the ones who borrow close to their maximum line and leave no cushion for volatility. A few habits keep the risk manageable.
Borrow well below the credit limit the lender offers. If your portfolio can support a $300,000 line, drawing $100,000 gives you room to absorb a substantial market drop before you face a maintenance call. Keep separate cash reserves available so you can meet a call without selling assets at a bad time. Avoid using the line for consumption just because the rate is low; interest still accrues, the rate can rise, and the collateral can be sold. And remember that variable rates cut both ways, so budget for the possibility that your borrowing cost climbs over the life of the loan.
Used carefully, a securities-based loan is a low-cost way to access the value of your portfolio without disturbing the underlying investments. Used carelessly, it hands the lender the authority to sell your holdings at the worst possible moment. The difference is almost entirely about how much room you leave between what you borrow and what your collateral can support.