Systematic Investment Plan Calculator (SIP)

This calculator helps you plan a recurring monthly investment in plain numbers. It shows how much your investment may grow, how much you would put in yourself, how much estimated growth comes from returns, what yearly increases can change, and how much the final amount may be worth after inflation.

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What this calculator shows

The calculator gives you the numbers you need to judge an investment plan instead of only showing one final balance. The result includes estimated future value, total invested, estimated gain, final-year monthly investment, inflation-adjusted value, and a year-by-year projection.

• Estimated future value: the projected balance at the end of the selected period.
• Total invested: the total amount you personally put in, including current investment if entered.
• Estimated gain: the projected growth above your own contributions.
• Final-year monthly investment: the monthly amount in the last year if you use an annual increase.
• Inflation-adjusted value: the future balance shown in today’s buying power.
• Year-by-year projection: a table showing how the plan grows over time.

Future value mode

Use this mode when you already know how much you can invest every month. Enter your monthly investment, expected return, duration, yearly increase, current investment, and inflation rate. The calculator estimates the future balance and separates your own contributions from projected growth.

This mode is useful when you want to test a monthly habit. For example, you can compare $250, $500, and $1,000 per month and see how each plan looks after 5, 10, 20, or 30 years.

Goal planning mode

Use this mode when you already have a target amount. Enter the target, return assumption, duration, current investment, yearly increase, and inflation rate. The calculator estimates the starting monthly investment needed to reach that target.

This is the mode to use for real goals like building $50,000, $100,000, $500,000, or $1,000,000. If the required monthly amount is too high, adjust the duration, target, return assumption, or yearly increase until the plan fits your actual budget.

Monthly investment amount

The monthly amount should be something you can keep doing. A smaller amount that survives rent, bills, emergencies, slow work months, and unexpected expenses is more useful than a high number you stop after three months.

Try the calculator with a comfortable amount first. Then run a second version with a higher amount. The difference shows how much extra investing can help, but the final choice still has to work in real life.

Expected annual return

The expected return is an assumption, not a promise. A higher return makes the future value look bigger and makes goal mode require a lower monthly investment. A lower return makes the estimate more conservative.

Run at least three scenarios: low return, middle return, and high return. This gives you a range instead of one overconfident number. For long-term investing, the range is usually more useful than a single exact-looking result.

Annual investment increase

The annual increase field is for step-up investing. If you enter 5%, your monthly investment increases by 5% each year. If you enter 10%, it increases by 10% each year.

This is helpful if you expect your income to rise. It lets you start with a manageable monthly amount and increase it later. Check the final-year monthly investment in the results to make sure the future amount is still realistic.

Current investment amount

Use this field if you already have money invested for the same goal. The calculator grows that current amount along with your future monthly investments.

In goal mode, this can sharply reduce the monthly investment needed. In some cases, your current investment may already be enough to reach the target by the end of the selected period, so the required monthly investment can show as $0.

Inflation-adjusted value

The inflation-adjusted result shows what the projected future balance may feel like in today’s money. This is especially useful for long-term goals, because $100,000 years from now will probably not buy the same amount as $100,000 today.

Use inflation for goals where buying power matters: retirement, housing, education, long-term savings, or financial independence. For short-term planning, it may be less important but still useful to see.

Year-by-year projection

The yearly table shows the plan building over time. It includes the monthly investment for that period, total invested, estimated value, and estimated gain.

In the first few years, most of the balance usually comes from your own contributions. Later, the estimated gain can become a larger part of the total. This table helps you see when compounding starts doing more of the work.

How to use the results

Start by checking whether the monthly amount is realistic. Then look at total invested and estimated gain. If most of the result depends on a very high return assumption, lower the return and calculate again.

For a serious goal, save or copy the results for several versions:

• one conservative return scenario
• one middle return scenario
• one optimistic return scenario
• one version with no annual increase
• one version with a realistic annual increase

This gives you a better planning range and shows whether the goal depends on aggressive assumptions.

Common mistakes to avoid

• Using only one return rate: test multiple return assumptions.
• Ignoring inflation: long-term goals should be checked in today’s buying power.
• Choosing a monthly amount that is too high: consistency matters more than a perfect spreadsheet number.
• Forgetting current investments: existing money can change the plan a lot.
• Assuming smooth returns: real markets do not grow in a straight line every month.
• Not checking the final-year step-up amount: a yearly increase can become too large later.

Best way to plan with this calculator

Use the calculator as a planning tool, not as a final answer. First, find a monthly investment that fits your life. Then test a longer duration, a reasonable annual increase, and a lower return assumption. If the plan still works under conservative numbers, it is more dependable.

For major goals, compare the calculator result with your emergency fund, debt payments, job stability, taxes, and actual investment choices. The math is useful only if the monthly plan is something you can keep doing through normal life interruptions.