Hidden rules are the restrictions prop firms bury in terms and conditions rather than sales pages - and the first contact is usually the breach email. The recurring cast: consistency percentages that gate payouts, news windows that void trades, minimum profitable days, IP and copy-trading checks, inactivity clauses, and payout gates like KYC deadlines (FundedNext deactivates accounts if KYC is not completed within 30 days of passing - help.fundednext.com, checked 28 October 2026).

The pattern to know: rules cluster where the firm carries risk the sales page does not mention. Nobody hides the profit target; everybody under-communicates the payout gate. That asymmetry is why reading the agreement - not the checkout page - is the five highest-value minutes in this business.

Practical checklist before buying: payout terms and gates, the exact drawdown definition, consistency wording, news counting, and the account-sharing clause. Our challenge rules guide walks the full set, and the hidden rules inventory lists the ones that have ended real accounts.

Plain-language material on leveraged-trading risk is maintained by the ESMA investor corner.

Part of the rules & drawdown cluster and the full prop firm glossary.