> ## Documentation Index > Fetch the complete documentation index at: https://docs.dionysus.finance/llms.txt > Use this file to discover all available pages before exploring further. # Worked examples > The fee arithmetic on concrete numbers. All examples use an **illustrative 10% performance fee** for round numbers. Your vault's actual rate is fixed at deployment and shown in the app; the mechanics are identical. ## 1 · Simple profit Deposit **$10,000**. The vault grows to **$13,000**. You exit everything. * Principal returned fee-free: \$10,000 * Realised profit: $3,000 → fee $300 * **You receive \$12,700.** ## 2 · Exit at a loss Deposit **$10,000**. The vault falls to **$8,000**. You exit everything. * You are below your high-water mark. Profit: $0 → **fee $0.\*\* * **You receive \$8,000.** No fee ever applies to a loss. ## 3 · Partial withdrawal below the mark Deposit **$10,000**. The vault grows to **$13,000**. You withdraw **\$6,000**. * Cumulative withdrawn ($6,000) ≤ contributed ($10,000): still under the mark → **fee \$0.** * Your remaining fee headroom is \$4,000 — you can take that much more before any fee starts. ## 4 · Crossing the mark Continuing from example 3, you later withdraw another \*\*$7,000** (cumulative withdrawn: $13,000). * The first \$4,000 exhausts your remaining headroom → fee-free. * The last $3,000 is new profit → fee $300. * Your taxed total is now $3,000, so the mark rises to $13,000 — that profit can never be charged again. ## 5 · Withdraw, redeposit, withdraw — no double charge Deposit **$100**, vault grows, you withdraw **$150** (fee charged on $50). You redeposit **$100\*\* and later withdraw **\$100**. * Contributed: $200 · withdrawn before this exit: $150 · already-taxed: $50 → mark = $250. * Cumulative withdrawn after this exit: $250 — exactly at the mark → **fee $0.\*\* * The \$50 of profit was taxed once and only once, exactly as designed. ## 6 · Stale feed at exit You exit with real profit, but a price feed your vault relies on has gone stale. * The vault refuses to compute a fee from a stale price: **fee waived, \$0 charged**, and the waiver is logged as an explicit event in your [statement](/vault/statements). In every case the app's [fee projection](/fees/profit-fee-at-exit) shows you these numbers before you sign.