Short version: borrowing usually isn't taxed, selling usually is. That gap is the main reason long-term holders borrow instead of sell. Here's the full picture, and the catches.
When you sell bitcoin, you realize a capital gain on the difference between what you paid (your cost basis) and what you sold it for. In the US that gain is taxable, at long-term rates if you held more than a year, at higher short-term rates if you didn't. For someone who bought early and is sitting on a large gain, selling can hand a meaningful slice to the tax authority.
A loan works differently. You still own your bitcoin, you've just pledged it as collateral, and the cash you receive is borrowed, not earned. Borrowed money isn't income anywhere that treats loans normally, so the act of borrowing doesn't trigger tax. This is the same reason a homeowner can borrow against a house that has gained value without paying tax on the gain: a loan is not a sale.
That is the entire tax case for borrowing instead of selling. Whether it actually beats selling depends on the interest you pay, how long you hold the loan, and the liquidation risk you take on, which is what the next section weighs.
Say you've held 1 BTC bought years ago at $20,000, it's worth $100,000 today, and you need $50,000 in cash. You have two clean ways to get it.
The selling path costs you tax once, up front, and ends your exposure on the coins you sold. The borrowing path costs you interest that recurs each year the loan is open, keeps your full bitcoin position, and adds the risk that a deep enough crash liquidates your collateral. Which is cheaper depends on the size of your gain, the rate you can borrow at, and how long you'll hold the loan. A large gain plus a short loan tends to favor borrowing; a small gain plus a loan you'll carry for years can favor just selling.
"No taxable event" is the starting point, not a guarantee. A few situations change the math.
A forced liquidation is a sale. If bitcoin falls and the lender sells your collateral to cover the loan, that sale realizes a capital gain exactly as if you'd sold it yourself, except you didn't choose the timing or the price. This is the tax risk that rides along with the liquidation risk, and it usually lands at the worst possible moment.
Interest usually isn't deductible for personal use. If you borrow for personal spending, the interest generally can't be written off. There can be exceptions when the borrowed funds are used for investment or business purposes, but those depend heavily on your situation and jurisdiction.
Some "loans" are really sales in disguise. Certain structures where you fully hand over your coins with no real obligation to return the specific asset can be treated as a disposal. Straightforward collateralized loans from the lenders we track are structured as loans, but exotic products deserve a closer read.
Jurisdiction changes everything. The general principle that loans aren't income holds in many countries, but the details, from capital gains rates to how collateral is treated, vary widely. Nothing here is specific to where you live.
Borrowing against bitcoin lets you raise cash without triggering the capital gains tax that selling would, and without giving up your position. For long-term holders with big gains, that can be a genuinely large saving. It is not free: you pay interest, and you take on liquidation risk that a simple sale avoids. The tax advantage is a reason to consider a loan, not a reason to borrow more than you can safely carry.
Taxes are one factor in a bigger choice — the full sell-versus-borrow decision is worked through here. New to all this? Start with the complete guide to bitcoin-backed loans.