FD Calculator - Fixed Deposit Maturity Calculator
Calculate your Fixed Deposit (FD) maturity amount and interest earned across monthly, quarterly, half-yearly, or yearly compounding frequencies.
AI Quick Summary
Definition & Purpose:
A Fixed Deposit (FD) is a savings instrument offered by banks that pays a fixed interest rate on a lump-sum deposit locked in for a set term. This calculator projects the maturity amount and interest earned across different compounding frequencies.
When to Use:
Use this calculator to project the maturity value of a fixed deposit before opening one, or to compare how different compounding frequencies affect the same deposit.
Key Takeaway Insights:
- Unlike a SIP or PPF, an FD is a single lump-sum deposit — there are no recurring contributions, only the principal compounding at a fixed rate for a fixed term.
- Compounding frequency (monthly, quarterly, half-yearly, or yearly) changes the maturity value even when the stated annual rate is identical, because more frequent compounding reinvests interest sooner.
- The formula and its variables (P, r, n, t) are the standard fixed-rate compound interest equation used across virtually all bank FD and CD maturity calculations.
FD Investment Plan
Maturity Returns
Introduction
FD Calculator – Fixed Deposit Maturity & Interest Projection
A Fixed Deposit (FD) is a savings instrument offered by banks and NBFCs that pays a higher, fixed interest rate than a regular savings account in exchange for locking your money in for a set term. Unlike a SIP or PPF, there are no recurring contributions — you deposit a single lump sum, and it compounds at your chosen frequency until maturity.
This calculator projects your Maturity Amount and Interest Earned based on your principal, interest rate, compounding frequency, and tenure.
The FD Maturity Formula
A = P × ≤ft(1 + (r / n × 100))^n × t
Where:
- A: Maturity amount.
- P: Principal deposit.
- r: Annual interest rate.
- n: Compounding frequency per year (12 monthly, 4 quarterly, 2 half-yearly, 1 yearly).
- t: Tenure in years.
Worked Example
For a principal of $10,000 at a 7% annual rate, compounded quarterly, over 5 years:
- n = 4, t = 5
- A = 10,000 × ≤ft(1 + dfrac7400)^20 = 10,000 × (1.0175)^20 ≈14{,}147.78$
- Interest earned: 14{,}147.78 - \10,000.00 =4{,}147.78$
How Compounding Frequency Affects Returns
Holding a $100,000 principal at 6.5% annual interest for 5 years, only changing how often interest compounds:
| Compounding Frequency | Maturity Amount | Interest Earned |
|---|---|---|
| Yearly | $137,008.67 | $37,008.67 |
| Half-yearly | $137,689.43 | $37,689.43 |
| Quarterly | $138,041.98 | $38,041.98 |
| Monthly | $138,281.73 | $38,281.73 |
The gap between yearly and monthly compounding here is about $1,273 over 5 years — worth checking when comparing FD offers that quote the same headline rate but different compounding schedules.
What This Calculator Does Not Include
To model recurring monthly deposits instead of a single lump sum, try the RD Calculator, or compare this fixed-rate approach against a market-linked lump-sum investment with the Lumpsum Calculator.
Formula & Variables Explained
This tool utilizes standard equations formulated under standard rules.
Variables:
- Input parameter: Values supplied to resolve the output formula.
How to Calculate (Step-by-Step)
- Input the required parameters into the form.
- Click the calculate or auto-compute option.
- The outputs will refresh instantly with step-by-step variables.
Worked Examples Calculation
15-Year FD ($10,000 Principal @ 7% p.a., Quarterly Compounding)
Principal = $10,000, Annual Rate = 7%, Compounding = Quarterly (n=4), Tenure = 5 Years
A = 10,000 (1 + 7/400)^(45) = 10,000 (1.0175)^20 = 10,000 1.414778 = $14,147.78.
Maturity Amount = 14,147.78 | Interest Earned =4,147.78
25-Year FD ($100,000 Principal @ 6.5% p.a., Monthly Compounding)
Principal = $100,000, Annual Rate = 6.5%, Compounding = Monthly (n=12), Tenure = 5 Years
A = 100,000 (1 + 6.5/1200)^(125) = 100,000 * (1.005417)^60 = $138,281.73.
Maturity Amount = 138,281.73 | Interest Earned =38,281.73
Real-World Applications
Widely used in student curriculum, professional projections, and quick estimations.
Limitations & Common Mistakes
- Entering incompatible unit formats (e.g. Mixing Metric and Imperial).
- Typographical mistakes in numeric entry fields.
Assumes a constant interest rate for the entire tenure with no premature withdrawal. Does not account for taxes on interest earned or any penalties for early withdrawal.
Frequently Asked Questions (FAQ)
Q:Which compounding frequency offers the highest FD returns?
At the same stated annual rate, monthly compounding produces the highest maturity value, followed by quarterly, then half-yearly, then yearly — because more frequent compounding reinvests interest sooner, letting it start earning its own interest earlier. The difference is real but usually modest: a 100,000 deposit at 6.5% for 5 years earns about37,009 with yearly compounding versus about 38,282 with monthly compounding, a gap of roughly1,273.
Q:Can I withdraw money from a Fixed Deposit before maturity?
Most banks allow premature withdrawal, but it typically comes with a penalty — usually a reduced effective interest rate applied for the actual time the money was held, rather than the full rate you were originally offered. Some FDs may also charge a flat penalty fee.
Q:Are Fixed Deposit returns taxed?
In many jurisdictions, interest earned on a fixed deposit is treated as taxable income and taxed annually as it accrues, regardless of whether you've actually withdrawn it. Tax rules and applicable brackets vary significantly by country, so this calculator focuses purely on the maturity math.
Q:How is an FD different from a savings account?
A fixed deposit locks your money in for a set term in exchange for a higher, fixed interest rate than a regular savings account typically offers. In return for that higher rate, you generally give up easy access to the funds — early withdrawal usually comes with a penalty, unlike a savings account where you can withdraw freely at any time.
References & Citations
CalculationDesk Editorial Team
Content & Calculation Editors
The CalculationDesk Editorial Team consists of math educators, technical writers, and product specialists dedicated to ensuring accuracy and clarity for everyday calculations.
CalculationDesk Review Team
Quality Assurance & Formula Verifiers
Our internal Review Team ensures that every calculator logic corresponds precisely to established academic standards and industry specifications.
Was this calculator helpful?
Embed this Calculator
You are welcome to embed this tool on your own blog or website. Simply copy the code snippet below and paste it into your HTML code.