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Quick answer
What does the Fixed-term deposit growth calculate?
What will a fixed deposit return by maturity? This calculator uses deposit amount, annual interest rate, term, and compounding periods per year to estimate value at maturity immediately in your browser.
With the values currently entered, the result is $15,973.65 — estimated maturity value. It also shows interest earned, and term return.
How to use the Fixed-term deposit growth
- Replace the example values with your own numbers.
- Review the result and supporting figures as they update automatically.
- Check the formula and assumptions before using the estimate for a decision.
Inputs used
- Deposit amount
- Annual interest rate — entered in %
- Term — entered in months
- Compounding periods per year — entered in times
Fixed-term deposit growth formula
Principal × (1 + annual rate ÷ compounding periods)^(periods × years)
Assumptions
- The rate is fixed for the full term.
- No early withdrawal occurs.
Verify the inputs
Authoritative sources
These sources explain the definitions, factors, or rules behind this tool. Their geographic scope is shown because an official source for one country is not automatically valid somewhere else.
Definitions and disclosure rules for APR, mortgages, credit cards, and consumer loans.
Compound interestInvestor.gov — US Securities and Exchange CommissionScope: General method; US sourceA plain-language definition of interest earned on principal and accumulated interest.
Sources do not endorse Calculum. Check the source date, scope, and your own documents before making a financial, tax, insurance, or reporting decision.
Practical guide
Fixed-term deposit growth example and edge cases
What will a fixed deposit return by maturity? Let's use a concrete example, then look at the assumptions that can move the answer.
Example: A practical fixed-term deposit growth scenario
For this example, use deposit amount of 15,000, annual interest rate of 4.2 %, term of 18 months, and compounding periods per year of 12 times. These are starting values, so replace them with numbers that match your situation.
- Deposit amount
- 15,000
- Annual interest rate
- 4.2 %
- Term
- 18 months
- Compounding periods per year
- 12 times
Calculated result$15,973.65estimated maturity value
Start with estimated maturity value. Then check interest earned, and term return to understand what sits behind the main result.
Example results use the default display profile. The calculator above follows your selected country and units.
How to read the result
- Read the main result first. The supporting figures for interest earned, and term return explain how the estimate is built.
- The method is Principal × (1 + annual rate ÷ compounding periods)^(periods × years). Keep the units consistent and use values from the same time period.
Edge cases worth checking
When deposit amount is unusual
The rate is fixed for the full term. Double-check this input before relying on the result.
When compounding periods per year is uncertain
No early withdrawal occurs. Run a lower and higher value to see a useful range.
What changes the result most
Deposit amount
Use a current amount for deposit amount. Include fees or recurring costs that belong in the same figure.
Annual interest rate
Test a lower and higher annual interest rate. A small percentage change can move the final result more than expected.
Term
Keep term on the same time basis as the other inputs. Monthly and annual values are easy to mix up.
Try a different scenario
Small changes show whether the answer is stable or sensitive.
Deposit amount: 10% lower
13,500$14,376.28estimated maturity value
Deposit amount: 10% higher
16,500$17,571.01estimated maturity value
Annual interest rate: 10% higher
4.62 %$16,074.23estimated maturity value
Common mistakes
Check deposit amount
The rate is fixed for the full term. Make sure this matches the number you enter.
Keep compounding periods per year consistent
No early withdrawal occurs. Use the same units and time period throughout the calculation.
Do not rely on one fixed-term deposit growth scenario
Run a cautious case and an optimistic case. The range is often more useful than one exact-looking number.
Use this result well
What will a fixed deposit return by maturity?
A lender’s APR, fees, eligibility rules, and contract control the real offer.