1Your account
2Your trade
Trade 1 contract to risk $400 at your stop.
Contract limit on this account: 5 minis or 50 micros.
Room to max loss 20% of it
FX conversions use the ECB reference rates of 2026-10-13. Sizes are rounded down, so the risk never goes over what you set. A stop doesn't guarantee your fill: in fast markets the loss can be larger.
Example: Trading Combine + Express Funded (Standard) · Evaluation · 50K
Risking 1% ($500) on NQ with a 20-point stop gives 1 contract. That stop uses 20% of the max loss on a fresh account. After a losing day there is less room, so type what is left today.
The limits your stop has to fit, by account
Fresh accounts, from Topstep's official pages. The max loss trails on some accounts, so the room to it can be smaller than shown once the balance has been higher.
| Account | Daily loss limit | Max loss | Max contracts |
|---|---|---|---|
| Trading Combine + Express Funded (Consistency) · Evaluation · 50K | none | $2,000 trailing | 5 |
| Trading Combine + Express Funded (Consistency) · Evaluation · 100K | none | $3,000 trailing | 10 |
| Trading Combine + Express Funded (Consistency) · Evaluation · 150K | none | $4,500 trailing | 15 |
| Trading Combine + Express Funded (Consistency) · Funded · 50K | none | $2,000 trailing | — |
| Trading Combine + Express Funded (Consistency) · Funded · 100K | none | $3,000 trailing | — |
| Trading Combine + Express Funded (Consistency) · Funded · 150K | none | $4,500 trailing | — |
| Trading Combine + Express Funded (Standard) · Evaluation · 50K | none | $2,000 trailing | 5 |
| Trading Combine + Express Funded (Standard) · Evaluation · 100K | none | $3,000 trailing | 10 |
| Trading Combine + Express Funded (Standard) · Evaluation · 150K | none | $4,500 trailing | 15 |
| Trading Combine + Express Funded (Standard) · Funded · 50K | none | $2,000 trailing | 2 |
| Trading Combine + Express Funded (Standard) · Funded · 100K | none | $3,000 trailing | 3 |
| Trading Combine + Express Funded (Standard) · Funded · 150K | none | $4,500 trailing | 3 |
Calculators by instrument: Gold lot size calculator (XAUUSD) · NAS100 lot size calculator (US100) · US30 lot size calculator (Dow Jones) · Futures position size calculator
Topstep position size questions
What contract size can I trade on a Topstep account?
It depends on your stop and on what is left of the account's limits. On a fresh Trading Combine + Express Funded (Standard) · Evaluation · 50K account, risking 1% ($500) on NQ with a 20-point stop is 1 contract. Pick your own account, stop and today's remaining daily loss in the calculator.
How many contracts can I trade at Topstep?
Topstep caps the full-size contracts you can hold, by account: 50K Trading Combine + Express Funded (Consistency): 5; 100K Trading Combine + Express Funded (Consistency): 10; 150K Trading Combine + Express Funded (Consistency): 15; 50K Trading Combine + Express Funded (Standard): 2; 100K Trading Combine + Express Funded (Standard): 3; 150K Trading Combine + Express Funded (Standard): 3. Micros count as a tenth of a mini at most firms. The calculator applies the cap of the account you pick.
Does Topstep have a daily loss limit?
No account we track at Topstep has a daily loss limit; only the max loss limits your stop. The calculator checks the stop against the room to the max loss.
Compare: position size calculator at other firms
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