Compound Interest Calculator
Calculate compound interest for daily, monthly, quarterly, and annual compounding frequencies, recurring deposits, EAR / APY, and real value.
Investing ₹100,000 initial principal plus ₹5,000/month at 10% p.a. (Annually (1/yr) compounding) accumulates a final corpus of ₹1,258,694 over 10 years (₹558,694 total interest).
Model compound wealth accumulation across daily, monthly, quarterly, semi-annual, and annual frequencies, Effective Annual Rate (EAR / APY), and inflation-adjusted purchasing power.
⚡ Smart Compounding Presets
1. Principal, Recurring Deposits & Compounding Parameters
⚖️ Cross-Frequency Compounding Yield MatrixImpact of Compounding Frequency
📅 Year-by-Year Compound Growth Schedule10-Year Growth Rollup
| Year | Opening Balance | Annual Deposits | Interest Earned | Closing Balance | Cumulative Interest |
|---|---|---|---|---|---|
| Year 1 | ₹1,00,000 | ₹60,000 | ₹12,703 | ₹1,72,703 | ₹12,703 |
| Year 2 | ₹1,72,703 | ₹60,000 | ₹19,973 | ₹2,52,676 | ₹32,676 |
| Year 3 | ₹2,52,676 | ₹60,000 | ₹27,970 | ₹3,40,646 | ₹60,646 |
| Year 4 | ₹3,40,646 | ₹60,000 | ₹36,767 | ₹4,37,413 | ₹97,413 |
| Year 5 | ₹4,37,413 | ₹60,000 | ₹46,444 | ₹5,43,857 | ₹1,43,857 |
| Year 6 | ₹5,43,857 | ₹60,000 | ₹57,088 | ₹6,60,946 | ₹2,00,946 |
| Year 7 | ₹6,60,946 | ₹60,000 | ₹68,797 | ₹7,89,743 | ₹2,69,743 |
| Year 8 | ₹7,89,743 | ₹60,000 | ₹81,677 | ₹9,31,420 | ₹3,51,420 |
| Year 9 | ₹9,31,420 | ₹60,000 | ₹95,845 | ₹10,87,264 | ₹4,47,264 |
| Year 10 | ₹10,87,264 | ₹60,000 | ₹1,11,429 | ₹12,58,694 | ₹5,58,694 |
How Repayment & Lifecycle Works
Understanding the key phases of your loan or investment timeline
Input Initial Principal Investment
Enter your starting lump sum deposit amount (e.g., ₹1,00,000 or $10,000).
Specify Additional Monthly Contribution
Add regular monthly deposits to accelerate compound growth over time.
Choose Interest Rate & Compounding Frequency
Select annual nominal interest rate and compounding frequency (Daily, Monthly, Quarterly, Semi-Annually, or Annually).
Analyze Final Corpus, EAR & Real Value
Instantly view your accumulated maturity corpus, Effective Annual Rate (EAR / APY), and inflation-adjusted real purchasing power.
Who Should Use the Compound Interest Calculator?
Long-Term Investors & Wealth Accumulators
Investors modeling exponential compound growth across multi-year wealth building horizons.
Bank Fixed Deposit & Savings Account Depositors
Savers comparing nominal bank rates against true Effective Annual Rates (EAR) across daily/quarterly compounding.
SIP & Mutual Fund Investors
Systematic investors evaluating the compounding snowball effect of combining lump sums with recurring monthly deposits.
Financial Planning & Education Seekers
Students, analysts, and planners studying the mathematical mechanics of compound interest formulas.
Key Benefits
- Understand the exponential snowball power of compound interest over time
- Compare bank FDs (quarterly compounding) against mutual funds or stocks (annual compounding)
- Optimize wealth creation by adding disciplined monthly contributions to your principal
- Discover the true effective annual yield (EAR / APY) beyond basic nominal rate quotes
Platform Features
- Flagship Multi-Frequency Compound Interest calculation engine
- Supports 5 Compounding Frequencies: Daily (365/yr), Monthly (12/yr), Quarterly (4/yr), Semi-Annually (2/yr), and Annually (1/yr)
- Effective Annual Rate (EAR / APY) yield precision calculator
- Recurring monthly deposit integration with beginning-of-month and end-of-month timing controls
- Cross-frequency yield comparison matrix showcasing additional returns from higher compounding frequencies
- Inflation-adjusted real purchasing power final corpus indicator
- Interactive year-by-year compounding growth schedule table
Multi-Frequency Compound Interest & EAR Formulas
Starting lump sum deposit amount at Year 0.
Recurring monthly contribution added every month.
Number of times interest compounds per year (Daily: 365, Monthly: 12, Quarterly: 4, Semi-Annual: 2, Annual: 1).
The true effective annual yield realized after accounting for intra-year compounding frequencies.
Practical Worked Scenarios
Benchmark Case Study: Lumpsum + Monthly SIP (₹1 Lakh + ₹5,000/mo @ 12% p.a., 10 Yrs)
Benchmark Case Study: Compounding Frequency Impact (₹5 Lakhs @ 10% p.a., 10 Yrs)
Common Mistakes to Avoid
Critical financial oversights that reduce long-term returns
Confusing nominal rate with effective rate: Always compare EAR / APY when evaluating products with different compounding frequencies.
Ignoring inflation: A nominal 10% return with 5% inflation yields a real purchasing power return of approximately 4.76% p.a.
Assuming simple interest rules: Simple interest only earns returns on the principal, missing out on the exponential growth of compound interest.
Compound Interest Calculator FAQs
Clear answers to common questions about calculations and methodology