Monthly vs Annual Compounding Savings
**Monthly compounding** credits interest each month—APY slightly higher than the nominal rate. **Annual compounding** credits once a year—common on older bonds and some promo CDs quoted with simple annual yield.
Step by step
1. Compare APY not APR
Banks must disclose APY on savings—use that for ranking.
2. Run FV both ways
Finance calculator with monthly vs annual period count.
3. Watch tiered promos
High promo rate may compound monthly on limited balance only.
Monthly vs annual compounding
Difference grows with rate and years—small on 4%, meaningful on 12%.
- Monthly: Higher effective yield; standard on HYSA.
- Annual: Simpler quote; slightly lower growth.
Common mistakes
- Comparing APR to APY across banks
- Ignoring fees that wipe yield
FAQ
Is daily better than monthly?
Marginally—compare APY across products.