Before You Borrow Against Bitcoin, Know What Changes
An original BCS Journal guide.
Borrowing against Bitcoin changes the relationship you have with your asset. Bitcoin that was available to move or hold freely becomes collateral supporting a financial obligation.
A simpler interface can make that process easier. It should also make the consequences easier to understand.
Before committing, a customer should be able to answer four questions: Who controls my collateral? What happens when I borrow? What do I owe? And what determines whether my collateral is released or liquidated?
Who controls my collateral?
“Your keys, your Bitcoin” is a familiar starting point. Once Bitcoin backs a loan, the explanation needs to go further.
Keeping your wallet keys does not necessarily mean you can move pledged collateral whenever you choose. Your wallet may control the borrowing position, while the lending arrangement restricts withdrawals until its conditions are met.
The customer needs to understand where the collateral sits, what their wallet can authorize, and which actions can happen without another signature from them.
They should also know whether the arrangement uses Bitcoin directly or a representation of it on another network, and whether that introduces additional custody, bridge or technology dependencies.
Self-custody should describe specific controls and responsibilities. It should tell someone what they can do, what they cannot do, and what happens if they lose access to their keys.
What happens when I borrow?
An available borrowing limit and an outstanding debt are different things.
The experience should clearly show when collateral is committed, when funds are borrowed, when interest starts and how those funds become available for spending. Those steps can vary between products. In some decentralized lending arrangements, interest begins accruing as soon as the borrowing transaction completes. Borrowing mechanics explained
For a card connected to borrowing, this distinction matters. Does a purchase trigger a new draw? Is the customer spending funds borrowed earlier? What happens to the debt if the purchase is refunded?
These questions belong in the product experience. A customer should not need to reconstruct the financial process from several different services.
What do I owe?
The number shown as “available to spend” tells only part of the story.
A useful borrowing view should distinguish the amount borrowed, accrued interest, applicable fees and the amount needed to repay. It should explain whether the rate can change, when payments are due and how payments are applied.
Customers also need to see costs beyond the headline interest rate. Depending on the arrangement, these may include origination, platform, conversion, network or liquidation charges.
A repayment plan needs a source of funds and a timetable. Expected Bitcoin appreciation is uncertain; it should not be treated as a guaranteed way to meet an obligation.
Clear information helps a customer connect today’s purchase with tomorrow’s repayment.
When can my collateral be released or liquidated?
Collateral release should be understandable before collateral is committed.
Can the customer withdraw some Bitcoin while borrowing remains outstanding? How much debt must be repaid first? Are there processing steps, liquidity conditions or other restrictions? Some lending protocols require repayment or additional collateral before a withdrawal can proceed. An example of withdrawal conditions
Liquidation deserves equally clear treatment.
Loan-to-value, or LTV, compares the debt with the value of the collateral. Suppose someone borrows $5,000 against Bitcoin worth $20,000. Their LTV is 25%. If the collateral value falls to $10,000 while the debt remains unchanged, LTV rises to 50%.
That example excludes interest and fees. It does not establish a liquidation threshold, which depends on the borrowing arrangement.
Customers should know the applicable threshold, how collateral is valued, what costs liquidation can create and whether some or all of their collateral may be taken to repay debt. In automated systems, liquidation can occur once the position becomes eligible, without waiting for the borrower’s approval. How protocol liquidation can work
Simplicity should make the commitment clearer
At BCS, we’re developing an experience that connects Bitcoin-backed borrowing with everyday card spending. Our aim is to make the steps easier to navigate while keeping the financial commitment visible.
A customer should understand what changes when they borrow: who controls their collateral, what they owe, and what must happen for that collateral to come back to them.
That understanding is part of the product.
BCS provides technology; financial services are offered by independent providers. Bitcoin-backed borrowing involves debt and risk of collateral loss. This article is informational, not financial, investment or legal advice. Linked protocol documentation illustrates particular mechanisms, not BCS provider relationships or universal loan terms.