What Is a Minimum Deposit? A Worked Example

Direct answer

Minimum Deposit is the smallest amount of money a provider requires for an account to be opened and/or funded. In forex and similar leveraged products, it matters because your deposit is the capital base that can absorb losses before margin requirements are not met. A “worked example” makes this concrete by using numbers to show what your deposit could mean for margin and usable funds.

Mechanism and definition

To work with Minimum Deposit, keep these terms separate:

• Minimum Deposit: a provider’s stated threshold (a starting rule).
• Deposit balance: the cash you add to the account.
• Costs: items that reduce available funds, such as trading fees and bid/ask spread effects.
• Margin and margin buffer: leveraged trading typically requires collateral (margin). The “buffer” is the part of your deposit that remains after reserving margin.

A worked example is not a prediction. It is a calculation under explicitly stated assumptions about prices, costs, and how margin is reserved.

Worked example with explicit assumptions

Assume a provider states a Minimum Deposit of $100. Also assume the following (you must replace them with the provider’s actual terms for verification):

1. You deposit $100.
2. The account uses leverage so that placing a position requires $20 of margin (your “reserved margin”) at the time of entry.
3. Trading costs (fees plus spread-related cost) total $2 immediately and are taken from the available balance.
4. No additional deposits or withdrawals occur.
5. We focus on one moment: right after entry and costs.

Step-by-step

• Starting deposit: $100.
• Costs impact available funds: $100 − $2 = $98 available after costs.
• Reserved margin for the position: $20.
• Remaining usable funds (buffer): $98 − $20 = $78.

What does this illustrate?

• Minimum Deposit tells you the starting minimum to begin.
• Your deposit does not automatically translate into “free capacity” for trading; a portion becomes reserved margin.
• Costs reduce the balance that can act as the buffer.

One clear limitation / failure mode

If the market moves against the position, losses can quickly consume that buffer. A failure mode is margin not being met (for example, when accumulated losses reduce equity so the provider requires more margin or limits further trading). Even if you started above the Minimum Deposit, a small deposit can still be depleted because costs and adverse price movement reduce the equity that supports margin.

Relevant limitations and risks (what can change)

1. Minimum Deposit is a provider rule, not a market rule: different providers can set different thresholds.
2. Margin behavior depends on terms: margin reservation, maintenance margin, and how quickly equity is compared can vary.
3. Costs are not fixed: spreads and fees can change with market conditions and order type.
4. Equity can move faster than you expect: leveraged products can amplify changes in equity.
5. Your example uses assumptions: without the provider’s exact fee schedule, margin formula, and instrument specifications, the numbers are only illustrative.

Verification and next question

To independently verify Minimum Deposit for your situation, check the provider’s account documentation for:

• the stated Minimum Deposit threshold,
• how margin is calculated and which margin requirements apply,
• the fee and cost components (including spread and commission treatment),
• and any rules about what happens when margin requirements are not met.

A next useful question is: “When my deposit equals the Minimum Deposit, what margin buffer remains after the specific entry costs for the instrument I plan to trade?”