What does this calculator calculate?
Calculate before-tax simple interest and maturity value for a lump-sum deposit or monthly savings. Deposits occur once for a lump sum or at the start of each month for monthly savings.
Worked examples
These examples use fixed sample inputs, separately from your current calculation. Displayed numbers are rounded.
South Korea units
- Savings type
- Monthly savings
- Deposit amount
- 500000 KRW
- Annual interest rate
- 3.5 %
- Term
- 12 months
- Maturity value before tax
- 6,113,750 KRW
US units
- Savings type
- Monthly savings
- Deposit amount
- 500 USD
- Annual interest rate
- 3.5 %
- Term
- 12 months
- Maturity value before tax
- 6,113.75 USD
Frequently asked questions
How do deposit and monthly savings interest differ?
A lump-sum deposit earns interest for the whole term. Monthly deposits have different remaining terms: deposit × annual percentage ÷ 100 ÷ 12 × n(n+1) ÷ 2.
Does this include Korean or US interest taxes?
Results are before tax. Country-specific taxes, exemptions and account rules are not applied; bank day-count conventions may differ.
Method and references
Before tax, simple interest. Monthly deposits occur at the start of each month; lump-sum is deposited once. Actual bank day-count conventions may differ.
Calculation methods, precision and data storage
Content updated: