# Investment Calculator Project investment growth with initial principal plus monthly contributions and compound interest. Supports compounding frequency, inflation-adjusted real value, and yearly contribution escalation, with a yearly breakdown table and nominal vs real balance curves. > Canonical page: https://elysiatools.com/en/tools/investment-calculator - **Category:** Finance - **Keywords:** investment, compound interest, periodic contribution, dollar cost averaging, inflation, real value, finance, savings growth ## Overview The Investment Calculator projects the long-term growth of your portfolio by combining an initial principal with recurring monthly contributions and compound interest. By factoring in compounding frequency, inflation rates, and annual contribution increases, this tool generates a detailed yearly breakdown and compares nominal balances against inflation-adjusted real values. ## Inputs - **Initial Investment** (number): e.g. 10000 - **Monthly Contribution** (number): e.g. 500 - **Annual Return Rate (%)** (number): e.g. 7 - **Investment Period (Years)** (number): e.g. 20 - **Compounding Frequency** (select) - **Contribution Timing** (select) - **Inflation Rate (%)** (number): e.g. 3 (optional) - **Annual Contribution Increase (%)** (number): e.g. 2 (optional) - **Decimal Places** (number) ## When to use - When planning long-term savings goals, such as retirement or a down payment, and you want to see the impact of monthly contributions over time. - When comparing how different compounding frequencies, from daily to yearly, affect your overall investment growth. - When you need to estimate the future purchasing power of your portfolio by adjusting the projected returns for inflation. ## How it works - Enter your initial investment amount and the monthly contribution you plan to add to the portfolio. - Set the expected annual return rate, investment period in years, compounding frequency, and contribution timing. - Optionally input an estimated inflation rate and an annual percentage increase for your monthly contributions to simulate rising income. - Generate a yearly breakdown table and interactive curves comparing nominal balances with inflation-adjusted real values. ## Use cases - Projecting retirement savings over 30 years with a 3% annual inflation adjustment to understand future purchasing power. - Modeling a dollar-cost averaging strategy where monthly contributions increase by 5% each year as your income grows. - Comparing the growth of a high-yield savings account compounding monthly against an index fund compounding quarterly. ## Frequently asked questions ### What is the difference between nominal and real balance? Nominal balance is the actual dollar amount your investment grows to, while real balance adjusts that amount for inflation to show its future purchasing power in today's dollars. ### How does the annual contribution increase option work? It automatically escalates your monthly contribution amount by a set percentage at the end of each year, simulating salary raises or increased savings capacity. ### Can I change how often interest is compounded? Yes, you can select daily, monthly, quarterly, or yearly compounding frequencies to match your specific investment vehicle. ### What does contribution timing mean? It determines whether your monthly contributions are added at the beginning or the end of each compounding period, which slightly alters the interest accrued. ### Can I export the yearly breakdown table? 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