The starting amount compounds annually for the full period, while each yearly addition compounds for the years remaining after it is made. Together they give the projected nominal value.

Dividing that by the inflation factor converts the result into today's purchasing power — the number that actually tells you whether the goal is met.

Given: Start ₹500,000, add ₹50,000/year, growth 10% p.a., 15 years, inflation 6%

(1.10)¹⁵ = 4.17725  ·  Starting amount grows to 500,000 × 4.17725 = ₹2,088,624

Additions grow to 50,000 × (4.17725 − 1)/0.10 = ₹1,588,624

Projected value ≈ ₹3,677,248 on ₹1,250,000 contributed

Inflation-adjusted = 3,677,248 / (1.06)¹⁵ ≈ ₹1,534,000 in today's money

• Yearly additions are assumed at the end of each year; earlier deposits grow slightly more.
• Growth compounds annually here — monthly compounding gives a marginally higher figure.
• The inflation adjustment shows purchasing power, not a change in the actual balance.
• Taxes on gains, fees and expense ratios are not deducted.

Why is the inflation-adjusted value so much lower?
Because prices rise too — over 15 years at 6%, money loses well over half its purchasing power.

What growth rate is realistic?
Use a conservative long-term average for your asset class rather than a recent bull-market figure.

How is this different from a compound investment calculator?
This one uses yearly additions with annual compounding and adds an inflation-adjusted result.