Daily Compound Interest Calculator
Calculate maturity amount with interest compounded daily, including optional monthly contributions.
How to use the Daily Compound Interest Calculator
- Enter the principal — the lump sum you invest today.
- Enter the annual interest rate (e.g., 7.5 for 7.5%).
- Enter the tenure in years and/or months.
- Optionally enter a monthly contribution if you add money every month.
- Click Calculate.
Examples & tips
Example 1: ₹1,00,000 at 7% for 5 years, no monthly contribution → maturity ≈ ₹1,41,902.
Example 2: ₹50,000 at 6% for 3 years with ₹5,000 monthly → maturity ≈ ₹2,56,500 (approx).
Tip: Daily compounding yields slightly more than monthly compounding at the same rate.
Frequently asked questions
What formula is used?
For the principal: A = P × (1 + r/365)^(365 × t). For each monthly contribution, interest is calculated for the remaining days at the same daily rate, then summed. r is the annual rate as a decimal, t is tenure in years.
How are monthly contributions handled?
Each contribution is assumed made at the start of the month. It earns interest from that day until maturity. The tool sums all contributions plus their interest.
Does this match my bank’s compounding?
Most banks compound daily but credit the interest monthly or quarterly. The final maturity matches the daily-compounded formula; the interim balance may vary by bank.
Are taxes included?
No. This is a pre-tax estimate. Actual returns depend on tax bracket, TDS rules, and instrument type.