A $100,000 Bitcoin position may appear to support a $50,000 loan. But knowing how to calculate borrowing capacity means asking a more useful question: how much can you borrow while still having room for a sharp market move? In crypto-backed lending, the maximum loan a platform offers is rarely the amount a long-term holder should automatically take.
Borrowing against digital assets can create liquidity without forcing a sale, potentially preserving your exposure to future upside. That is the appeal behind a Borrow, Don’t Sell strategy. Yet your borrowing capacity is shaped by more than your wallet balance. Collateral eligibility, loan-to-value ratio, price volatility, interest costs, and the lender’s margin-call rules all affect what a responsible loan size looks like.
How to calculate borrowing capacity
At its simplest, borrowing capacity is the portion of your collateral’s current value that a lender is willing to lend against. The basic formula is:
Borrowing capacity = eligible collateral value × maximum LTV
LTV stands for loan-to-value ratio. It measures your outstanding loan balance as a percentage of your collateral’s market value.
If you deposit $80,000 of eligible ETH and a lender allows a maximum LTV of 50%, your theoretical borrowing capacity is $40,000:
$80,000 × 0.50 = $40,000
That figure is a ceiling, not necessarily a target. A 50% LTV loan means a 20% decline in collateral value takes your LTV from 50% to 62.5%, assuming the loan balance has not changed. A larger decline can put you near a margin call or liquidation threshold depending on the terms.
The more practical formula is:
Conservative borrowing amount = eligible collateral value × chosen LTV
Your chosen LTV should sit below the lender’s maximum. For volatile assets, many borrowers prioritize a meaningful safety buffer over extracting every available dollar.
Start with collateral the lender actually accepts
Your portfolio value and your eligible collateral value are not always the same. A lender may accept Bitcoin and Ethereum but not XRP, Solana, stablecoins, or smaller tokens. It may also assign different maximum LTVs to each asset.
For example, imagine you hold $150,000 split across BTC, ETH, and SOL. If the provider accepts only BTC and ETH, and those holdings total $110,000, your calculation begins with $110,000, not the full $150,000 portfolio value.
You also need to account for custody and transfer requirements. Some loan structures require you to transfer assets to a custodian or lender-controlled wallet. Others may use different collateral arrangements. Before treating a token as borrowable capital, confirm it is accepted, how it is held, and whether it remains eligible throughout the loan term.
Account for concentration risk
Collateral composition matters even when the nominal value is identical. A $100,000 portfolio concentrated in one volatile altcoin can behave very differently from $100,000 held in Bitcoin. Lenders recognize this through asset-specific LTV limits, and borrowers should recognize it through their own risk buffer.
A high-conviction holder may be comfortable maintaining exposure to one asset. That does not make a high-LTV loan against that asset automatically prudent. Your loan should survive ordinary volatility, not only a favorable market week.
Choose an LTV that fits your risk tolerance
Maximum LTV tells you the most you may be permitted to borrow. It does not tell you the right amount to borrow.
Suppose your lender offers a maximum 50% LTV against Bitcoin. With $100,000 in collateral, you could borrow up to $50,000. But these three choices create very different risk profiles:
- At 20% LTV, you borrow $20,000 against $100,000 of BTC.
- At 35% LTV, you borrow $35,000 against $100,000 of BTC.
- At 50% LTV, you borrow the full $50,000 allowed.
If Bitcoin falls 30%, your collateral drops to $70,000. The $20,000 loan becomes 28.6% LTV, the $35,000 loan becomes 50% LTV, and the $50,000 loan becomes 71.4% LTV. The last position may already be under pressure, depending on the lender’s margin-call and liquidation levels.
A lower initial LTV generally provides more time and flexibility if prices decline. The trade-off is simple: you receive less immediate cash. For investors using capital for a short-term expense with reliable repayment funds, a moderate LTV may be workable. For borrowers using proceeds to fund a business, invest, or cover an uncertain timeline, a larger buffer can be especially valuable.
Calculate your liquidation buffer
The number that deserves as much attention as borrowing capacity is the liquidation threshold. This is the LTV level at which a lender can sell some or all collateral to repay the loan. Terms vary widely, so use the threshold specified in the loan agreement rather than assuming one standard applies everywhere.
You can estimate the collateral value that would trigger liquidation with this formula:
Collateral value at liquidation = loan balance ÷ liquidation LTV
Assume you borrow $30,000 and the liquidation LTV is 80%. Your estimated trigger value is:
$30,000 ÷ 0.80 = $37,500
If you began with $100,000 in collateral, the asset value would need to fall about 62.5% before reaching that threshold, ignoring accrued interest and any changes to collateral. That is a substantial buffer, but crypto markets have produced substantial moves.
Now compare a $50,000 loan on the same $100,000 collateral. At an 80% liquidation LTV, liquidation begins around $62,500 in collateral value. A 37.5% price decline could bring the position to that point. The difference between borrowing $30,000 and $50,000 is not just $20,000 of cash. It is a much narrower margin for error.
Include interest in your math
Interest increases your loan balance over time if it is not paid from outside funds. That slowly raises your LTV even if the collateral price stays flat.
If a $30,000 loan accrues $2,400 in interest and you do not pay it, the relevant balance becomes $32,400. At an 80% liquidation threshold, the trigger collateral value moves from $37,500 to $40,500. This is why the advertised annual percentage rate is only part of the cost analysis. Review whether interest is paid monthly, deducted from proceeds, capitalized into the balance, or otherwise handled.
Origination fees, withdrawal fees, and early repayment terms can also change the economics. A loan with a lower headline rate may not be cheaper if its fees are higher or its collateral terms are less forgiving.
Stress-test before you borrow
A responsible calculation uses several price scenarios, not one current price. Take your proposed loan amount and recalculate LTV after a 20%, 40%, and 60% decline in collateral value. For assets with more dramatic trading histories, consider a deeper scenario as well.
For a $100,000 collateral position and a $30,000 loan, the math looks like this: after a 20% decline, collateral is $80,000 and LTV is 37.5%. After a 40% decline, collateral is $60,000 and LTV is 50%. After a 60% decline, collateral is $40,000 and LTV is 75% before interest.
Then ask practical questions. Could you add collateral quickly? Do you hold stablecoins or cash that you would genuinely be willing to deploy? Could you repay part of the loan without selling at a poor time? Is the loan purpose worth the risk of losing assets you intended to hold for years?
Do not count on being able to act at the perfect moment. Crypto trades continuously, platform notifications can arrive during volatile periods, and a rapid sell-off may leave less time than expected. A buffer only helps if it is real.
Compare lender rules, not just loan amounts
Two providers can quote the same maximum LTV and still offer materially different borrower experiences. Compare liquidation thresholds, margin-call procedures, notification methods, collateral custody, supported assets, loan duration, interest payment schedules, and whether partial repayments reduce risk immediately.
Also distinguish between fixed-term loans, open-ended credit structures, and loans that permit flexible repayment. Flexibility can be valuable, but it may come with a higher rate or different collateral controls. The best structure depends on whether you need a defined amount for a known expense or ongoing access to liquidity.
CryptoLoanAdvisor’s independent approach is useful here: evaluate the full loan mechanics before committing assets, rather than choosing a provider based only on the largest initial borrowing figure.
Borrow for a purpose, not for a limit
Your capacity should be tied to a specific use of funds and a repayment plan. Borrowing $25,000 to bridge a tax payment, business expense, or time-sensitive purchase is different from borrowing the maximum simply because it is available. The latter can turn paper wealth into forced-selling risk.
Before signing, write down your collateral value, starting LTV, lender maximum LTV, margin-call level, liquidation threshold, monthly interest obligation, and the price levels at which you would add collateral or repay. If those numbers make you uncomfortable on paper, they will not feel better during a market drawdown.
Borrowing against crypto can preserve ownership and create valuable optionality. The disciplined move is not to find the biggest loan your holdings can support. It is to choose the loan your holdings, cash flow, and risk tolerance can carry through an unfavorable market.
