What is a Fixed Deposit (FD)?

A Fixed Deposit (FD) — also called a term deposit, time deposit, or certificate of deposit — is a financial product offered by banks and financial institutions where you deposit a lump sum of money for a fixed period at a predetermined interest rate. At maturity, you receive the principal plus interest. FDs are one of the safest investment options as they are typically insured by government deposit protection schemes.

You deposit money with a bank for a fixed tenure (e.g., 1 year, 5 years). The bank pays you interest at a fixed rate for the entire period. In a cumulative FD, interest is reinvested and compounded, giving you a larger lump sum at maturity. In a non-cumulative FD, interest is paid out periodically (monthly, quarterly, or annually) and the principal is returned at maturity.

What is the difference between cumulative and non-cumulative FD?

Cumulative FD: Interest is compounded and reinvested throughout the tenure. You receive a lump sum at maturity — ideal for long-term wealth building. Non-cumulative FD: Interest is paid out at regular intervals (monthly, quarterly, annually) and is not reinvested. Ideal for generating passive income. Cumulative FDs deliver higher total returns due to the compounding effect, while non-cumulative FDs provide regular cash flow.

How is FD interest calculated?

For cumulative (compound interest) FDs: A = P × (1 + r/n)^(n×t), where A = maturity amount, P = principal, r = annual interest rate, n = compounding frequency per year, t = tenure in years. For simple interest FDs: Interest = P × r × t. The compounding frequency significantly affects returns — monthly compounding yields slightly more than yearly compounding at the same nominal rate.

What is the effective annual yield (EAR) of an FD?

The Effective Annual Rate (EAR) accounts for the compounding effect and represents the true annual return. For an FD with 7% nominal rate compounded monthly: EAR = (1 + 0.07/12)^12 − 1 ≈ 7.229%. This is your actual yearly return, slightly higher than the nominal rate due to compounding.

Does FD beat inflation?

FDs often struggle to beat inflation. If an FD earns 7% but inflation is 5%, the real return is only about 1.9% (Fisher equation). If inflation is 7% or higher, your real return could be near zero or negative, meaning your purchasing power is not growing. This is the fundamental limitation of fixed-income products — they preserve capital but may not grow real wealth significantly over long periods.

What is the real return on an FD?

Real return is your inflation-adjusted return, calculated using the Fisher equation: Real Return = ((1 + nominal) / (1 + inflation)) − 1. Example: 8% nominal return, 5% inflation → Real return ≈ 2.86%. Real return tells you how much your actual purchasing power is growing — the number that truly matters for wealth preservation.

Is FD interest taxable?

In most countries, FD interest is taxable as income. In India, interest above INR 40,000 (INR 50,000 for senior citizens) per year triggers TDS deduction. In the US, interest is taxable as ordinary income. In the UK, Personal Savings Allowance may exempt some interest. Use the Tax Rate input in Advanced mode to see your post-tax maturity and effective returns. Always consult a tax advisor for specific guidance.

FDs are among the safest investment instruments. Most countries have government-backed deposit insurance schemes that protect FDs up to a certain limit (e.g., DICGC covers up to INR 5 lakh in India; FDIC covers up to $250,000 in the US). The main risks are: (1) inflation eroding purchasing power, (2) interest rate risk if rates rise after locking in, and (3) opportunity cost compared to equity investments over long periods.

FD vs Savings Account — what is the difference?

FDs offer significantly higher interest rates than savings accounts (typically 2–4× higher) but require locking in money for a fixed period. Savings accounts offer instant liquidity. FDs are ideal for money you don't need for the agreed tenure. Many people use both: savings accounts for emergency funds and short-term expenses, FDs for medium-term goals and capital preservation.

FD vs Bonds — which is better?

FDs offer guaranteed returns, government deposit insurance, and fixed income with no market risk. Bonds can offer higher yields, are tradeable, and provide duration-based return opportunities, but carry credit risk and price volatility. For conservative investors prioritising capital safety, FDs win. For those comfortable with moderate risk seeking higher income, bonds may be superior. A balanced portfolio often includes both.

Which compounding frequency is best for FD?

Monthly compounding produces the highest effective annual yield for the same nominal rate, followed by quarterly, half-yearly, then yearly. The difference is modest but meaningful over longer periods. Example at 7% nominal: Yearly compounding → 7.00% EAR. Quarterly → 7.186%. Monthly → 7.229%. Choose monthly or quarterly compounding when available for slightly better returns.

Can I break an FD before maturity?

Most FDs allow premature withdrawal, but with a penalty — typically a 0.5–1% reduction in the interest rate earned, plus forfeiture of the remaining tenure's interest. Some banks also charge a flat penalty fee. FDs are not designed for short-term liquidity needs. If you anticipate needing money, consider laddering FDs with different maturities, or keeping emergency funds in a liquid account.

What is FD laddering?

FD laddering is a strategy where you split your capital into multiple FDs with different maturity dates (e.g., 1 year, 2 years, 3 years). As each FD matures, you reinvest it at the prevailing rate. Benefits: (1) better liquidity — one FD matures every year, (2) interest rate risk is spread out, (3) you can take advantage of rising rates. Laddering is a smart strategy for medium-to-long-term FD investing.

Is FD good for passive income?

Yes — non-cumulative FDs with monthly or quarterly payout are excellent passive income tools for retirees or conservative income investors. A large principal generates predictable, regular income without market risk. The trade-off: you forgo compounding, so total lifetime returns are lower than a cumulative FD. Use the Payout Schedule section in Advanced mode to model your monthly income from any deposit amount.

What is the ideal FD duration?

Short-term (1–3 years): Good for near-term goals, capital preservation, parking surplus funds. Medium-term (3–5 years): Balance of return and flexibility, good for moderate goals. Long-term (5–10 years): Maximises compounding, suitable for wealth building alongside other investments. Key insight: compounding benefits increase significantly after 5+ years. If liquidity is not a concern, longer tenures generally yield better outcomes.

Can senior citizens get higher FD rates?

Yes — most banks offer an additional 0.25% to 0.75% interest rate for senior citizens (typically 60+ years). This is a meaningful boost: a 0.5% additional rate on a 7% FD improves returns by over 7% relative. Use the Senior Citizen toggle in Advanced mode to model the impact of this bonus on your returns.

What is auto-reinvestment in FD?

Auto-reinvestment means that when an FD matures, the bank automatically creates a new FD of the same duration at the prevailing interest rate. It is the FD equivalent of a step-up SIP — ensures your capital stays invested without gaps. The risk: you may reinvest at a lower rate if interest rates fall. Review the prevailing rates at maturity and decide whether to reinvest or redeploy the capital.

How much can I earn from a Fixed Deposit?

Returns depend on: principal amount, interest rate, tenure, and compounding frequency. Example: 100,000 at 7% for 5 years with quarterly compounding → maturity ≈ 141,478 (total interest ≈ 41,478). Use this calculator to model any scenario. For long-term goals, note that inflation-adjusted returns from FDs are modest — equity investments typically deliver higher real returns over 10+ year horizons.

When should I choose FD over other investments?

FDs are best when: (1) capital protection is the primary goal, (2) you have a known upcoming expense in 1–5 years, (3) you need stable passive income (payout FDs), (4) as part of an emergency fund beyond the liquid savings layer, (5) during high market volatility when you want a safe harbour for a portion of capital. FDs should complement, not replace, equity investments in a long-term wealth portfolio.

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Fixed Income Growth Simulator

FD Calculator

Calculate your fixed deposit maturity amount, interest earned, and real returns — across 3 modes: simple projection, advanced inflation & tax analysis, and goal-based deposit planning. Supports both cumulative and payout FDs.

FD Settings

Deposit Amount

₹

Interest Rate

% p.a.

Duration

years

Compounding Frequency

Maturity Amount

₹1,41,478

After 5 years

Total Interest Earned

₹41,478

29.3% of maturity

Effective Annual Yield

7.186%

Quarterly (4×/yr)

Principal Amount

₹1,00,000

70.7% of maturity

Maturity Breakdown

Principal Deposited

₹1,00,000

70.7% of maturity

Interest Earned

₹41,478

29.3% of maturity

FD Growth Over Time

How your deposit grows over the investment period.

Year 1

₹1,07,186

Year 2

₹1,14,888

Year 3

₹1,23,144

Year 5 (Maturity)

₹1,41,478

Why FD?

Why Fixed Deposits?

FDs are a cornerstone of conservative wealth management — safe, predictable, and simple.

Capital Safety

Principal is insured by government deposit protection schemes. One of the safest financial instruments available globally.

Predictable Returns

Fixed interest rate locked in at deposit time. No market volatility — you know exactly what you will receive at maturity.

Passive Income

Monthly or quarterly payout FDs generate regular income streams without selling any assets — ideal for retirees.

Compounding Power

Cumulative FDs reinvest interest, allowing compound growth over time. Longer tenures amplify the compounding effect.

Flexible Tenures

Available from 7 days to 10 years. Match the tenure to your specific financial goal or cash flow need.

Better Than Savings

FDs offer 2–4× higher rates than savings accounts for money you don't need immediately.

How Compounding Frequency Affects FD Returns

At the same 7% nominal interest rate, different compounding frequencies produce different effective annual yields (EAR):

Compounding	Effective Yield (EAR)	vs Yearly
Simple Interest	7.000%	Linear, no reinvestment
Yearly	7.000%	Same as nominal
Half-Yearly	7.123%	+ 0.123%
Quarterly	7.186%	+ 0.186%
Monthly	7.229%	+ 0.229%

Monthly compounding produces the highest yield. The difference is small per year but compounds to a meaningful advantage over long periods.

How FD Interest Is Calculated

Compound Interest Formula

A = P × (1 + r/n)^(n×t)

A = maturity amountP = principal depositedr = annual interest raten = compounding periods/yeart = tenure in years

The higher the compounding frequency (n), the more frequently interest is reinvested, marginally increasing the maturity amount.

Simple Interest Formula

Interest = P × r × t

Maturity = P + (P × r × t)

P = principalr = annual rate (decimal)t = years

Simple interest does not reinvest earnings — the interest base stays constant. Growth is linear, not exponential.

Real Return (Fisher Equation)

r_real = (1 + r) / (1 + i) − 1

r = nominal return (EAR)i = annual inflation rater_real = real purchasing power return

Real return tells you whether your wealth is truly growing after the eroding effect of inflation. E.g., 7% FD with 5% inflation → ~1.9% real return.

Effective Annual Yield (EAR)

EAR = (1 + r/n)^n − 1

r = nominal annual raten = compounding periods/yearEAR = true annual return %

EAR converts the nominal rate into the actual annualised return accounting for intra-year compounding. Always compare FDs using EAR, not nominal rate.

Payout FD Calculation

For non-cumulative (payout) FDs, interest is calculated on the original principal only: Payout per period = P × (r / periodsPerYear). No compounding occurs. Total income = sum of all payouts. Principal is returned intact at maturity.

FD vs Other Investments

Feature	FD	Savings Account	Bonds	Equity / SIP
Returns	5–9% fixed	2–4%	5–12%	8–16%+ (variable)
Capital Safety	✅ Guaranteed	✅ Guaranteed	⚠️ Credit risk	❌ Market risk
Liquidity	⚠️ Penalty	✅ Instant	⚠️ Secondary market	✅ T+2 days
Inflation Beat	⚠️ Marginal	❌ Rarely	⚠️ Sometimes	✅ Long-term yes
Complexity	✅ Very simple	✅ Simple	⚠️ Moderate	⚠️ Moderate
Ideal For	Capital preservation, income	Emergency fund	Fixed income diversification	Long-term wealth

When FD is the Right Choice

•Preserving a lump sum for a known future expense
•Retirement income via monthly payout FDs
•Safe harbour during market uncertainty
•Short-to-medium horizon goals (1–5 years)
•Conservative risk tolerance investors
•Supplementing equity portfolio with stable returns

When to Consider Alternatives

•Long-term wealth building (15–30 year horizon)
•Real wealth growth significantly above inflation
•High-inflation environments eroding FD returns
•Need liquidity within a short notice period
•Target retirement corpus (equity SIP beats FD)
•Young investors with time horizon advantages

FAQ

Fixed Deposit — Frequently Asked Questions

Everything you need to know about fixed deposits, compounding, real returns, and payout structures.