Compound Interest: Daily vs Monthly
Published July 16, 2026By Samson PG
Quick answer
6% compounded daily is not the same as 6% compounded monthly. More periods mean a slightly higher effective yield — all else equal.
Compound interest credits returns on principal plus interest already earned. How often it compounds (daily vs monthly vs annually) changes the outcome even when the nominal annual rate looks identical.
TryCalculatingNow’s calculator is math only — not investment advice, not a forecast of any specific product.
Same nominal rate, different schedules
A common model:
FV = P × (1 + r/n)^(n×t)- P = principal
- r = nominal annual rate (decimal)
- n = compounding periods per year (
12monthly,365daily — products vary) - t = years
Larger n → interest posts more often → slightly larger FV for the same r and t, before fees and rate changes.
Illustration (no contributions)
$10,000 at 6% nominal for 5 years:
| Compounding | n | Idea |
|---|---|---|
| Monthly | 12 | Interest 12 times per year |
| Daily | 365 | Interest 365 times per year |
Daily wins by a small margin at typical consumer rates — noticeable over long horizons, easy to overstate in marketing. Always read whether the product quotes nominal rate, APY/EAR, or something else.
Effective annual yield (intuition)
Rough comparison tool:
EAR ≈ (1 + r/n)^n − 1Higher n raises EAR toward a limit for a fixed nominal r. Banks often advertise APY so you can compare apples to apples across compounding schedules.
Contributions change the story
If you add monthly deposits, you need a model that mixes contribution timing with compounding frequency. See compound interest with monthly contributions.
Use TryCalculatingNow Compound Interest Calculator
TryCalculatingNow Compound Interest Calculator lets you set principal, rate, years, compounding-related inputs, and contributions, then chart growth. Use it to compare scenarios — not as a product recommendation.
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FAQ
Is daily always “better”?
All else equal, more frequent compounding raises effective yield slightly. Fees, caps, and variable rates often matter more than daily vs monthly.
Is 365 or 360 days used?
Products differ (365, 360, business days). Match the calculator to the disclosure.
Does this match my bank app?
Not always — promotional APYs, withheld tax, and mid-cycle deposits diverge from textbook FV.
APR on a loan vs savings compounding?
Related math, different framing. Loan APR/amortization is not the same UI as a savings FV chart.