Travelers should follow the 30-70 rule, keeping approximately 30% of travel money as cash for emergencies and small purchases, and 70% in electronic form through credit cards, debit cards, or prepaid forex cards for security. Most countries require declaration of foreign currency exceeding USD 5,000 in cash or USD 10,000 total including traveler's cheques when crossing borders to comply with anti-money laundering regulations. Local currency limits typically range around equivalent of USD 1,000 without declaration requirements, with amounts like INR 25,000 for India representing common thresholds. Carrying excessive cash increases theft risk, so travelers should use hotel safes for storing excess money and only carry daily expense amounts in wallets or secure money belts. ATM withdrawals in local currency often provide competitive exchange rates compared to currency exchange counters, though international transaction fees may apply depending on banking relationships. Credit cards with zero foreign transaction fees represent ideal alternatives for major purchases including hotels, tours, and restaurants, saving both cash reserves and currency conversion charges.