For a new BTC-backed loan with no existing debt and collateral below the applicable borrowing-value cap, the basic estimate is BTC amount × BTC price × collateral discount rate × Initial LTV. For example, assuming 1 BTC is valued at 100,000 USDT, the collateral discount rate is 100%, and Initial LTV is 70%, the estimated borrowing capacity is 70,000 USDT. These are hypothetical inputs, not verified current ViaBTC parameters or a loan quote. The actual amount depends on the platform’s applicable prices, parameters, limits, and account conditions.
Bitcoin holders who want liquidity without selling their coins often turn to collateral-backed borrowing. ViaBTC’s Collateral-Pledged Loans enables eligible miners to borrow USDT against supported crypto assets to cover operating expenses such as electricity and miner maintenance. This article explains how borrowing capacity is calculated and outlines the risks that come with borrowing against a volatile asset.
What Determines Borrowing Capacity
For ViaBTC’s Collateral-Pledged Loans, the amount of USDT available to borrow depends on five factors: the quantity of BTC pledged, the platform’s applicable BTC price at the time of calculation, the collateral discount rate assigned to BTC, the platform’s Initial LTV (loan-to-value) parameter, and any outstanding principal or accrued interest already attached to the position. Product-level constraints—such as minimum loan size, collateral caps, and account eligibility—also apply.
BTC prices move continuously, and platform parameters can change, so the amount available today is not guaranteed to be the same tomorrow. Check the applicable values and available loan amount in the loan interface before borrowing.
Calculating Collateral Value
The first step in a borrowing-capacity calculation is converting the pledged asset into a USDT-denominated collateral value. ViaBTC uses the following formula:
Collateral Value = Collateral Amount × Coin Price × Discount Rate
The “BTC Price” here refers to the platform’s applicable index price for loan valuation, which may differ from the spot price on a given exchange. The discount rate is the proportion of that value recognized as collateral. If the applicable BTC discount rate is 100%, its value is counted in full; a rate below 100% reduces the recognized value. Check the applicable BTC discount rate before calculating an actual loan amount. ViaBTC Crypto Loans User Agreement
ViaBTC’s published FAQ lists a BTC collateral-value cap of 50,000,000 USDT for borrowing-capacity calculations. Value above that cap does not increase borrowing capacity. The cap does not apply when calculating position LTV, which uses the actual collateral amount under the applicable valuation rules. FAQ of Collateral-Pledged Loans
From Collateral Value to Maximum Loanable Amount
For a new BTC-only position with no existing debt and collateral value below the applicable cap, the basic calculation is:
Maximum Loanable Value = Collateral Value × Initial LTV
Initial LTV is the ratio used to calculate the loanable amount against the collateral. Use the applicable Initial LTV displayed in the loan interface rather than assuming a fixed percentage. ViaBTC’s minimum loan size per transaction is 50 USDT. Introduction to Collateral-Pledged Loans
Total borrowing capacity is different from the amount available for an additional loan. If a position already has outstanding principal and accrued interest, that debt uses part of its capacity. If collateral value exceeds the applicable borrowing-value cap, the excess does not support additional borrowing. The account’s displayed available loan amount is therefore the figure to check before submitting a new loan request.
Why Borrowing Capacity Changes: Current LTV
Initial LTV governs the calculation of borrowing capacity. Once a loan is outstanding, the relevant risk measure is Current LTV, defined as:
Current LTV = Total Debt ÷ Collateral Value × 100%
ViaBTC treats pledged collateral and outstanding loans as a unified position, and Total Debt includes both unpaid principal and accrued interest, not principal alone. ViaBTC Crypto Loans User Agreement
For a BTC-only position, a fall in BTC’s price reduces collateral value and raises Current LTV. Interest accruing on unpaid debt also raises Current LTV, even if BTC’s price is unchanged. With other inputs unchanged, accumulating interest reduces the remaining room for additional borrowing. Repayments or an increase in collateral value can restore some of that room, subject to the applicable limits.
Interest and Its Effect on Total Debt
ViaBTC calculates interest on outstanding loans using daily simple interest:
Daily Interest = Outstanding Principal × APR ÷ 365
One day of interest accrues immediately upon borrowing, a partial day is counted as a full day, and subsequent interest accrues at 00:00 UTC each day on the outstanding principal. Introduction to Collateral-Pledged Loans
As an illustration only, a 10,000 USDT outstanding principal balance at a hypothetical 9.9% APR produces approximately:
10,000 × 9.9% ÷ 365 ≈ 2.71 USDT of interest per day
This is not a statement of ViaBTC’s current APR or a recommended loan size. Actual interest depends on the applicable rate and outstanding principal. Because unpaid interest adds to Total Debt, it affects Current LTV even when the loan principal itself remains constant.
Liquidation Thresholds Are Not the Same as Initial LTV
A common misunderstanding is treating liquidation LTV as an indication of how much can safely be borrowed. ViaBTC’s published liquidation-LTV schedule is tiered by total debt size:
| Total debt | Liquidation LTV |
|---|---|
| Up to and including 10,000 USDT | 96% |
| Above 10,000 USDT and up to and including 50,000 USDT | 95% |
| Above 50,000 USDT | 94% |
These figures describe the Current LTV levels that trigger forced liquidation, not the portion of collateral value available to borrow when opening a position. Initial LTV is the separate parameter used to calculate borrowing capacity. Introduction to Collateral-Pledged Loans
Margin Call LTV is the warning threshold for adding collateral. Borrowers should add collateral or repay part of the debt before Current LTV reaches the liquidation threshold. Reaching the liquidation threshold can trigger automatic sale of collateral; borrowers should not assume they will have a further opportunity to act. ViaBTC’s published FAQ states that a 2% liquidation fee applies. FAQ of Collateral-Pledged Loans
If liquidation proceeds do not fully cover the amount owed, the borrower may remain liable for the shortfall and related costs under the ViaBTC Crypto Loans User Agreement.
Worked Example
Suppose a miner pledges 1 BTC for a new loan with no existing debt. For illustration, assume:
- BTC valuation: 100,000 USDT per BTC.
- Collateral discount rate: 100%.
- Initial LTV: 70%.
- Collateral value is below the applicable borrowing-value cap.
These are hypothetical assumptions, not verified current ViaBTC parameters.
Collateral Value = 1 × 100,000 × 100% = 100,000 USDT
Estimated Maximum Loanable Value = 100,000 × 70% = 70,000 USDT
This illustrates the basic capacity calculation, not a recommended borrowing amount or a guaranteed loan offer. The actual available amount must be checked in the loan interface.
If BTC’s price subsequently falls or interest remains unpaid, Current LTV rises. The borrower should monitor the position and add collateral or repay debt before reaching the applicable liquidation threshold. The threshold is a liquidation trigger, not a deadline after which a grace period begins.
Risks to Consider
Borrowing USDT against BTC introduces several risks that should be weighed independently of any potential use for the borrowed funds.
BTC price risk. A decline in BTC’s price reduces collateral value and raises Current LTV, narrowing the margin before a margin call or liquidation.
Interest accumulation. Unpaid interest adds directly to Total Debt and therefore to Current LTV, independent of any change in BTC’s price.
Forced liquidation and residual liability. If Current LTV reaches the applicable threshold, collateral may be sold automatically, subject to a liquidation fee. If the proceeds are insufficient, the borrower may remain liable for the remaining balance.
Parameter changes. Discount rates, Initial LTV, APR, and liquidation thresholds are platform parameters that can be adjusted. A rate or ratio in effect when a position is opened is not guaranteed to remain unchanged for the life of the loan.
Platform and custody considerations. Pledged BTC is held and managed under the platform’s loan terms rather than remaining freely transferable, and access to it is governed by the applicable user agreement.
Borrowing against BTC creates an interest-bearing obligation and exposes the pledged collateral to liquidation risk. Retaining exposure to BTC does not guarantee a positive net return after borrowing costs. Readers considering this product should review the current terms in the ViaBTC loan interface and the applicable user agreement before pledging collateral or drawing a loan.
FAQ
How much USDT can I borrow against 1 BTC?
For a new position with no existing debt and collateral below the applicable cap, multiply the platform’s BTC price by the BTC collateral discount rate and Initial LTV. For example, hypothetical inputs of 100,000 USDT per BTC, a 100% discount rate, and 70% Initial LTV produce an estimated capacity of 70,000 USDT. Your actual available amount depends on the applicable parameters and account conditions.
Which Initial LTV should I use for ViaBTC?
Use the applicable Initial LTV displayed in the loan interface. Check the account’s available loan amount before borrowing, since prices, parameters, existing debt, and limits affect the result.
Is the liquidation LTV the maximum amount I can borrow?
No. Liquidation LTV is the Current LTV level that triggers forced liquidation. Borrowing capacity is calculated using the separate Initial LTV parameter.
Does BTC collateral get discounted when calculating loan value?
The calculation uses the platform’s applicable BTC discount rate. A 100% rate recognizes the full applicable value, while a lower rate reduces it. Check the rate in the loan interface before calculating an actual borrowing amount.
Why does my available borrowing capacity change even if I haven’t taken a new loan?
If you already have an outstanding loan, Current LTV incorporates both principal and accrued interest, and it also moves with BTC’s price. Both factors can change your remaining borrowing capacity without any new borrowing action on your part.
What happens if my collateral is liquidated but doesn’t cover my full debt?
According to the ViaBTC Crypto Loans User Agreement, the borrower may remain liable for any outstanding amounts and related costs.
References
Official documentation checked on September 28, 2026. Live loan parameters must be confirmed in the loan interface.