Accrued Interest in FD: Meaning and Calculation

Accrued interest in a fixed deposit (FD) is the interest earned over time but not yet paid or credited to the account. This calculator estimates that amount from the deposit principal, annual interest rate, and elapsed days, using simple daily accrual; the FD’s actual terms may use a different compounding or day-count method.

Formula

The calculator applies simple interest for the elapsed portion of a year:

Accrued interest = principal × (annual rate ÷ 100) × (elapsed days ÷ 365)

• Principal (p): the amount deposited, entered in your currency.
• Annual interest rate (apr): the stated yearly rate as a percentage.
• Elapsed days (days): the number of days for which interest has accrued.
• Accrued interest (acc): estimated interest earned but not yet credited or paid, in the same currency as the principal.

The 365-day denominator is a simplifying convention, not a universal FD rule. The calculator does not compound interest during the period. If the product uses a 360-day basis, calendar-year basis, quarterly compounding, or another method, its result can differ. The second output adds the estimated interest to principal for illustration; it does not imply that the FD has matured or that the interest is currently withdrawable.

Worked Example

Using the default inputs—principal of 100,000, annual rate of 7%, and 90 elapsed days:

1. Convert the annual percentage to a decimal: 7 ÷ 100 = 0.07.
2. Find the annual interest amount: 100,000 × 0.07 = 7,000.
3. Apply the fraction of a 365-day year: 7,000 × 90 ÷ 365 = 1,726.0274…
4. Round to two decimal places: estimated accrued interest = 1,726.03.
5. Add it to the principal for the illustrative combined amount: 100,000 + 1,726.03 = 101,726.03.

The rounded figures are estimates under this calculator’s simple-interest assumption. An FD statement can show a different accrued amount because of its crediting schedule, exact dates, rounding rules, or product conditions.

How Accrued Interest Works in an FD

Interest generally builds as time passes while a deposit remains invested. “Accrued” describes the portion earned by a particular date, whether or not the institution has yet credited it to the account or paid it to the depositor. For example, an FD may show interest accumulated since its last crediting date even though the next credit is scheduled later. Accrual is an accounting measure; it is not necessarily cash available for withdrawal.

How interest is ultimately paid depends on the FD’s terms. A cumulative deposit may add interest to the balance at scheduled intervals, allowing later interest to be calculated on a larger amount. A non-cumulative deposit may pay interest periodically instead. Some products calculate interest daily but credit it less frequently. These distinctions mean “daily accrual,” “compounding frequency,” and “payment frequency” are not interchangeable.

What Changes the Amount

For a basic estimate, accrued interest rises with the principal, the rate, and the time elapsed. The actual amount may also depend on details that this calculator does not request:

• Day-count convention: a contract may count actual calendar days over 365 or 366, or use another convention.
• Compounding and crediting: interest may be calculated or added at specified intervals rather than treated as simple interest throughout.
• Start and end dates: the deposit date, valuation date, and rules for counting those dates can affect the number of days.
• Rate changes or special terms: a product may specify conditions that affect the applicable rate or calculation. Check the account documents rather than assuming a single rate applies in every circumstance.
• Rounding: institutions may round daily or at crediting, while this calculator rounds only the final result to two decimal places.

To estimate a statement figure more closely, use the principal and rate applicable to the relevant period, count elapsed days according to the FD’s stated convention, and follow its compounding and rounding method. If the terms are unclear, ask the institution how it calculates accrued interest.

Accrued Interest, Credited Interest, and Maturity Value

These terms refer to related but different amounts. Accrued interest is earned up to a date but may still be uncredited. Credited interest has been posted to the account or paid under the product’s schedule. Maturity value is the amount due under the FD’s terms when it reaches its maturity date, which can include principal and interest calculated according to the contract.

A displayed accrued amount should therefore not automatically be treated as the amount payable if an FD is closed early, nor as the final maturity amount. Early closure, partial withdrawal, or other changes may be handled under product-specific terms. The calculator estimates only simple accrued interest for the entered period; it does not determine a payout, penalty, tax amount, or maturity value.

Common Questions and Calculation Limits

A frequent misconception is that accrued interest is always added to the deposit each day. Interest may accrue daily in an economic or accounting sense but be credited monthly, quarterly, at maturity, or on another schedule. Another is that the annual rate alone is enough to reproduce a statement balance; the day-count basis, compounding, dates, and rounding can also matter.

Use the calculator for a quick, transparent estimate when simple daily accrual is a reasonable approximation. For an exact account balance or payout figure, rely on the FD terms and the institution’s calculation for the dates in question. The calculator also treats the entered annual rate as constant throughout the period and does not account for additions, withdrawals, changing principal, or intermediate interest credits.

Frequently Asked Questions

What does accrued interest mean in an FD?
It is interest earned on a fixed deposit up to a stated date that has not necessarily been credited or paid yet.

How do I calculate accrued interest on an FD?
A simple estimate is principal × annual rate as a decimal × elapsed days ÷ 365. Use the FD’s own day-count and compounding rules for a closer figure.

Is accrued interest the same as interest credited?
No. Accrued interest may be earned but not yet posted or paid. Credited interest has been added to the account or paid according to the product schedule.

Can I withdraw accrued interest before an FD matures?
That depends on the FD’s terms and payment structure. An accrued figure alone does not establish that the amount is available for withdrawal; check the account documents or ask the institution.

Why does my FD statement show a different accrued amount?
Possible reasons include a different day-count convention, compounding schedule, date-counting rule, applicable rate, or rounding method. The estimate here uses simple interest and a 365-day year.

This result is an estimate for educational use, not financial advice; the FD’s terms and the institution’s disclosure give the exact figures.

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in p | Deposit principal | - | 100000 | 0 | 1000000000
in apr | Annual interest rate | % | 7 | 0.01 | 100
in days | Elapsed days | days | 90 | 0 | 36500
out acc | Accrued interest | - | p * (apr / 100) * days / 365 | 2
out total | Principal plus accrued interest | - | p + acc | 2