SIP Calculator with Inflation

This calculator is built for one purpose: helping you understand the difference between future account value and future buying power. Both matter, but they answer different questions. A nominal projection shows how large the balance may become. An inflation-adjusted projection shows how much that balance may really be worth in today's terms.

That distinction becomes critical for long-term goals. Retirement, children's education, healthcare reserves, and major lifestyle goals all depend on costs that will probably be higher in the future than they are now. If you plan only with nominal balances, you risk reaching the target number and still falling short in practical terms.

1. Enter your recurring contribution: start with the amount you can actually commit to regularly.
2. Set the expected return: use a cautious assumption that matches the portfolio you intend to hold.
3. Choose the investment period: inflation compounds over time, so long horizons make this input especially important.
4. Add an inflation rate: test both a base case and a harsher case for important goals.
5. Apply a step-up if relevant: increasing contributions can help keep pace with rising costs.

After running the numbers, compare the nominal and real outcomes side by side. The gap between them is often the clearest indication of whether your current plan needs reinforcement.

Inflation

The rate at which the general cost of goods and services rises over time, reducing the purchasing power of money.

Nominal Value

The raw projected future balance before adjusting for inflation.

Real Value

The future balance translated into today's buying power after discounting for inflation.

Real Return

The portion of investment growth that remains after accounting for inflation.

Purchasing Power

A practical way of asking what your future money may actually be able to buy.

The calculator first estimates the future value of recurring contributions using a standard compounding formula. It then discounts that projected future balance back into present-day terms using the inflation rate you provide.

This two-step view helps you distinguish between portfolio growth and purchasing-power growth. The second number is often the one that matters most when the goal is living expenses or a future spending commitment.

Retirement: a future balance that looks large in nominal terms may support a much smaller lifestyle after inflation.

Education costs: long-dated goals are especially sensitive to rising prices, so inflation-aware planning can prevent underfunding.

Healthcare reserves: expenses linked to care, treatment, or insurance often rise faster than broad inflation averages.

General wealth planning: the tool helps test whether your current savings habit is building real wealth or merely keeping pace.

1. Using inflation that is too low for the goal being planned.
2. Looking only at the nominal balance.
3. Ignoring the role of step-up contributions.
4. Assuming returns will automatically stay ahead of inflation.
5. Forgetting that tax and fees reduce real results further.

The calculator assumes a stable long-run inflation rate and a stable average investment return. Real life is messier. Inflation changes over time, different categories of spending rise at different speeds, and market returns arrive unevenly.

• The result is a projection, not a promise.
• It does not model taxes, fees, or account-specific rules automatically.
• It uses one inflation assumption even though your personal cost structure may differ from the headline average.

For important goals, use this calculator to establish a baseline and then test harsher inflation assumptions. A plan that survives that stress test is usually much more useful than one that looks comfortable only in ideal conditions.