A worked example
A ₹5,00,000 fixed deposit at 7% for 3 years, compounded quarterly, matures to approximately ₹6,16,780 — about ₹1,16,780 in interest earned. Change the compounding to annual instead of quarterly at the same rate and term, and the maturity value drops slightly to around ₹6,12,522 — a real difference of nearly ₹4,000, purely from how often interest compounds.