deposit 1000Account-holders can deposit in multiples of Rs.10 each month with no ceiling. The maximum period for post office RD accounts is 5 years, which can be further extended to 5 years byInitial deposit: S$1,000 for tenures from 2 to 24 months; S$10,000 for 1-month tenure and Choice Date with flexible tenure; S$1,000,000 for a 1-week tenure, applicable only to corporate accounts . Documents Requirement for Singapore