EasyToolio computes Fixed Deposit maturity values using standard RBI and banking compound interest methodologies:
1. Compound Interest (Quarterly / Periodic Compounding):
A = P × [1 + (r / n)]^(n × t)
2. Target Goal (Required Deposit Principal):
P = A / [1 + (r / n)]^(n × t)
• P (Principal): Initial deposit amount (e.g. ₹1,00,000)
• r (Annual Rate): Nominal annual rate in decimal form (e.g. 7.5% = 0.075)
• n (Compounding Periods): Cycles per year (Quarterly: 4, Monthly: 12, Half-Yearly: 2, Yearly: 1)
• t (Tenure in Years): Total investment duration in years
Live Standard Worked Example:
For a deposit of ₹1,00,000 at 7.50% p.a. for 3 years with quarterly compounding (n=4):
Quarterly rate = 0.075 / 4 = 0.01875. Total quarters = 4 × 3 = 12.
Maturity = 1,00,000 × (1.01875)^12 = ₹1,24,972. Interest Earned = ₹24,972.