Monthly compounding
A = P(1 + r / 12) ^ (12t)Monthly compounding is common for planning examples and recurring contribution schedules.
Compounding comparison
Daily compounding gives interest more chances to earn interest, but the difference can be modest. Use the full calculator to compare monthly and daily results with the same starting amount, deposits, rate, and years.
A = P(1 + r / 12) ^ (12t)Monthly compounding is common for planning examples and recurring contribution schedules.
A = P(1 + r / 365) ^ (365t)Daily compounding is common for bank interest and money market examples, especially when APY is advertised.
Decision checklist
APY already includes compounding, which makes it the cleaner headline comparison.
Monthly deposits, one-time deposits, and irregular deposits can produce different curves.
Fees, minimum balances, and withdrawal restrictions can erase a small compounding advantage.