Available Margin vs. Wallet Balance: Four Numbers in a Futures Account
A futures account displays several numbers that look like balances. Wallet balance, equity, used margin, and available margin can all differ. Their relationship answers the question: “If my balance is $1,000, why is an order requiring $600 rejected?”
The Four Numbers and Their Relationship
Exchange labels vary slightly, but futures-account balances can be organized into these four categories. Different names describe the same basic calculation structure.
Deposits + Cumulative realized P&L − Fees − Funding
= Settled money. Position P&L changes it when the position closes.
② Equity / Margin Balance
Wallet balance + Unrealized P&L
= Money remaining if everything were closed now.
③ Used Margin
Position initial margin + Margin reserved for unfilled orders
= Money already committed and unavailable for new use.
④ Available Margin
Equity (②) − Used margin (③)
= Money usable for a new order now.
Number ④, not ①, determines whether an order is possible. The large figure at the top of the account is usually ① or ②, so relying on that alone can produce a rejection.
Following One Account Through the Numbers
Use a hypothetical account to see how the four figures move.
Wallet balance: 1,000; equity: 1,000
Used margin: 0; available margin: 1,000
Open a 0.1 BTC Long at $60,000 with 10× Leverage
Notional = 60,000 × 0.1 = $6,000
Initial margin = 6,000 ÷ 10 = $600
Entry fee, assuming a 0.05% taker rate: $3
Wallet balance: 997 after the $3 fee
Equity: 997; used margin: 600
Available margin = 997 − 600 = $397
The $997 balance already differs from the $397 you can actually use. Higher leverage locks less margin for the same notional and leaves more available, but shortens the distance to liquidation.
Unrealized P&L Changes Equity, Not Wallet Balance
When price rises, only equity and available margin change; wallet balance remains unchanged.
Unrealized P&L = (61,200 − 60,000) × 0.1 = +$120
Wallet balance: 997, unchanged
Equity = 997 + 120 = 1,117
Used margin: 600, fixed at the initial amount
Available margin = 1,117 − 600 = $517
BTC Falls to $58,800 (−2%)
Unrealized P&L: −$120
Equity: 877; available margin: $277
This explains having a profit that cannot yet be withdrawn. Unrealized gains appear in equity but have not entered wallet balance. Most exchanges calculate withdrawable funds from wallet balance. Close the position to turn the gain into realized P&L before using it.
Funding, by contrast, is realized. Settlement every eight hours directly reduces or increases wallet balance. That is why the wallet may slowly change over several days even when price returns to its starting point.
Unfilled Orders Also Reserve Margin
This is a common reason available margin is smaller than expected. Unfilled limit orders reserve margin in anticipation of execution.
Place an additional buy limit:
0.05 BTC @ 58,000, using 10× leverage
Reserved notional = 58,000 × 0.05 = $2,900
Reserved margin = 2,900 ÷ 10 = $290
Used margin = 600 + 290 = 890
Available margin = 1,117 − 890 = $227
→ Only one position is visible, but available margin drops sharply.
→ Canceling the order immediately releases $290.
Layering limit orders at several prices accumulates reservations and consumes available margin. When an order is rejected, checking open orders first is often faster than inspecting positions. Orders that reduce a position, such as stops and take-profits, frequently do not require new margin, although treatment differs by exchange.
Why Is an Order Rejected When the Amount Matches Exactly?
An order needing $600 of initial margin is often rejected when exactly $600 is available. Validation includes fees as well as margin.
Initial margin required: 600
Expected taker fee: 6,000 × 0.05% = 3
Total required: $603 > $600 available
→ Insufficient-balance error.
If Price Moves During Validation
A market order's execution price is not yet fixed.
The exchange may add an extra buffer.
For this reason, many exchanges' “all-in” buttons use around 95–98% of available margin instead of 100%. Leave a buffer when entering quantities manually as well. Fees apply on the round trip, so allow for closing costs too.
What Changes Between Cross and Isolated Margin?
Cross and isolated margin determine how much of these balances can buffer the position.
The account's entire equity supports the position.
Remaining available margin delays liquidation.
→ Liquidation occurs when equity falls below maintenance margin.
Isolated Margin
Only margin allocated to that position acts as its buffer.
Once it is exhausted, liquidation can occur even with other wallet funds intact.
→ Loss is contained within that position.
The following numbers show how differently the same position can endure a move.
Assume a maintenance margin rate of 0.5% → Maintenance margin: $30
Isolated: $600 Allocated Margin
Loss buffer ≈ 600 − 30 = $570
570 ÷ 6,000 = 9.5% decline
Liquidation price ≈ 60,000 × (1 − 0.095) ≈ 54,300
Cross: All $997 of Equity as Buffer
Loss buffer ≈ 997 − 30 = $967
967 ÷ 6,000 = 16.1% decline
Liquidation price ≈ 60,000 × (1 − 0.161) ≈ 50,300
The same size and leverage produce liquidation distances differing by 1.7×.
Cross margin lasts longer, but liquidation exposes the entire account. Isolated margin limits the loss scope but closes sooner. In either case, notional relative to capital, rather than the leverage setting alone, determines actual risk. This is the starting point of position sizing. Use the exchange-displayed liquidation price as the exact reference; liquidation formulas differ somewhat between exchanges.
Four Common Situations
→ Unfilled orders have reserved margin.
→ Check the order list and cancel unnecessary reservations.
“I made a profit, but cannot withdraw it.”
→ Unrealized gains are absent from wallet balance.
→ Close the position to realize the gain before withdrawal.
“Equity is unchanged, but wallet balance fell.”
→ Funding settled or fees were deducted.
→ Check the eight-hour settlement history.
“I closed the position, but available margin did not return.”
→ Remaining pending orders or positions in another asset.
→ Release of isolated allocated margin can also be delayed.
As losses lower equity toward maintenance margin, the exchange sends margin-ratio warnings. Available margin is already near zero at that stage. Adding margin to endure the move is also a decision to maintain exposure during a loss. In extreme conditions, the insurance fund may be exhausted and positions forcibly reduced through ADL. In hedge position mode, long and short legs each reserve margin, potentially doubling used margin for the same net exposure.
The Order to Check
Reading the account in this order resolves most confusion.
2. Equity − Wallet balance = Unrealized P&L: What profit or loss is still floating?
3. Used margin: Separate positions from pending-order reservations.
4. Available margin: This is the amount usable for new entries.
Always check number 4 before submitting an order.
Labels vary, but the sequence “settled money → P&L adjustment → committed money → remaining money” reveals the same structure on any exchange.
Three Key Points
① Wallet balance is settled money; equity is wallet balance plus unrealized P&L. Unrealized gains increase equity and available margin, but not withdrawable funds.
② Available margin = Equity − Used margin. Used margin includes both position initial margin and unfilled-order reservations. Check open orders first after a rejection.
③ Validation includes fees, so filling all available margin can cause rejection. Cross and isolated margin use different buffers and can produce very different liquidation distances.
Notice
Balances, prices, quantities, margin amounts, fee rates, maintenance rates, and liquidation prices are hypothetical examples of calculation structure, not measured values for a specific exchange or asset. Balance labels, order-margin reservation, treatment of isolated unrealized profits, and liquidation formulas vary by exchange. Confirm actual values on your exchange screen. Leveraged trading can lose all principal. Investment decisions and responsibility are yours.
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