Cost of Delay Calculator

At ₹10,000/month, 12% annual return, and a 20-year horizon, delaying by 1 year reduces your final corpus from ₹99.9 lakh to ₹87.7 lakh: a cost of ₹12.2 lakh. The formula is: Cost = P × ((1+r)^n − 1)/r × (1+r) − P × ((1+r)^(n−12) − 1)/r × (1+r), where P = monthly SIP, r = monthly rate, n = total months. Use the calculator above to model your exact numbers.

At ₹10,000/month, 12% annual return, and a 20-year horizon, delaying by 5 years reduces your final corpus from ₹99.9 lakh to ₹49.0 lakh: a cost of ₹50.9 lakh. That is more than half your potential wealth lost to a 5-year delay. To catch up, you would need to increase your monthly SIP to ₹20,410 for the remaining 15 years.

Using the catch-up formula: if your original plan was ₹10,000/month for 20 years at 12%, and you delay 5 years, you must invest ₹20,410/month for the remaining 15 years to reach the same ₹99.9 lakh corpus. That is an extra ₹10,410 every month: more than double your original SIP. The calculator's catch-up card computes this automatically for your inputs.

No, but the cost of delay is steep. Starting at 40 with a 20-year horizon (retiring at 60) and ₹20,000/month at 12% yields ₹1.99 crore. Starting at 30 with the same horizon and ₹10,000/month yields the same ₹1.99 crore: you need to invest twice as much per month to match the earlier starter. The key insight: starting late is expensive but not fatal. Start today with whatever you can, then step up your SIP annually.

Yes, but the required increase is often larger than people expect. Four strategies work: (1) Invest more per month: the calculator shows the exact catch-up SIP. (2) Invest longer: extending your horizon by 3 years can partially offset a 5-year delay. (3) Use a step-up SIP: a 10% annual step-up starting delayed can close 30–40% of the gap. (4) Inject a lump sum: a one-time deployment can offset multiple years of delay. Some costs, however, are mathematically unrecoverable: starting at 40 with a 20-year horizon cannot match starting at 25 with a 35-year horizon at any reasonable SIP amount.

Delaying a ₹5 lakh lump sum by 3 years at 12% annual return costs ₹2.02 lakh in lost growth. The corpus drops from ₹9.72 lakh (deployed today for 20 years) to ₹7.70 lakh (deployed after 3 years for 17 years). The formula is: Cost = PV × (1+r)^n − PV × (1+r)^(n−d), where PV = lump sum, r = annual rate, n = total years, d = delay years. This is equivalent to losing 41% of your lump sum to inflation and opportunity cost combined.

Yes: inflation is a second penalty on top of the delay penalty. A ₹1 crore goal today requires ₹1.79 crore in 10 years at 6% inflation, ₹2.40 crore in 15 years, and ₹3.21 crore in 20 years. If you delay investing, you must hit a moving target that is growing faster than your nominal corpus. The calculator's inflation toggle shows real purchasing power: at 6% inflation, a ₹99.9 lakh corpus in 20 years is worth only ₹31.2 lakh in today's rupees.

Use three scenarios simultaneously: conservative (10%), moderate (12%), and optimistic (15%). The Nifty 50 long-run CAGR from 1979 to 2025 is approximately 15% including dividends, but future returns are not guaranteed. For planning purposes, 12% is a reasonable moderate assumption for equity mutual funds in India. Debt funds and fixed deposits should use 6–8%. The calculator shows all three scenarios side by side so you can see the range of possible delay costs.

Under Finance Act 2024 (effective from FY 2024-25, assessment year 2025-26), long-term capital gains on equity mutual funds above ₹1.25 lakh per year are taxed at 12.5%. For a ₹10,000/month SIP over 20 years at 12%, the gain is approximately ₹75.7 lakh. After the ₹1.25 lakh annual exemption, the taxable gain is roughly ₹74.5 lakh, producing an LTCG tax of approximately ₹9.3 lakh. Your net corpus drops from ₹99.9 lakh to ₹90.6 lakh. Delaying makes this worse: a smaller corpus means a smaller gain, but the tax exemption is fixed, so the effective tax rate on the delayed corpus is often higher proportionally. The calculator's post-LTCG toggle shows both numbers.

If you have no emergency fund, build that first: 3–6 months of expenses in a separate savings account. Once secured, compare your loan rate to your expected investment return after tax. At loan rates above 10–11%, prepaying is usually mathematically correct. At rates below 8%, investing is usually better. The exact break-even depends on your tax regime (old vs new), unused 80C room, and risk tolerance. Use the Prepay vs Invest calculator for your specific numbers. Do not let loan prepay become an excuse to delay investing indefinitely: even a small SIP alongside prepayment is better than no SIP.

The best age is the age you are right now. Every year of delay at 12% return and ₹10,000/month costs approximately ₹8–12 lakh in final corpus for a 20-year horizon. Starting at 25 with ₹5,000/month for 35 years creates ₹3.53 crore. Starting at 30 with ₹10,000/month for 30 years creates the same ₹3.53 crore: you must invest twice as much to catch up. Starting at 35 with ₹20,000/month for 25 years also creates ₹3.53 crore. The pattern is clear: each 5-year delay requires roughly doubling the monthly SIP to maintain the same outcome.

A step-up SIP grows your monthly investment annually (typically 5–10% to match salary growth). This reduces the cost of delay because your Year-1 SIP is lower, making the initial barrier easier to cross, and your later-year SIPs are higher, compensating for lost compounding years. Example: a flat ₹10,000/month for 20 years at 12% yields ₹99.9 lakh. A step-up SIP starting at ₹7,500/month and growing 10% yearly yields the same ₹99.9 lakh. If you delay 3 years, the step-up SIP needs only ₹9,200/month in Year 1 to catch up, versus ₹13,040 for a flat SIP. Use the Step-up SIP Delay tab to model this exactly.

Delay is almost always worse than fund underperformance. A 3-year delay at 12% costs approximately ₹33.5 lakh on a ₹10,000/month, 20-year plan. Even if you pick a fund that underperforms the index by 2% annually for 20 years, the underperformance cost is approximately ₹18.7 lakh: roughly half the delay cost. The worst fund started today usually beats the best fund started 5 years later. Time in the market beats timing the market, and it also beats picking the market.

Yes, but the interpretation differs. PPF has a fixed 7.1% rate (as of Q2 2026) and a 15-year lock-in: delaying by 1 year means 1 fewer year of compounding, but you cannot extend the horizon beyond 15 years (except via post-maturity extension). NPS has market-linked returns and a 60% lump-sum / 40% annuity structure at retirement: delay reduces both components proportionally. For government schemes, use the PPF calculator or NPS guide for scheme-specific rules, then apply the same delay math: the cost is always the lost compounding years.

That is the one legitimate reason to delay. Build your emergency fund first: 3–6 months of total monthly outgo in a separate savings account. The Emergency Fund Calculator computes your exact target based on employment type, dependents, EMIs, and health cover. Once you hit 3 months, split new savings 50/50 between the emergency fund and investments until you reach the full target. Never skip your employer-matched EPF contribution to build the emergency fund: the match is a guaranteed 100% return, better than any mutual fund.

At ₹10,000/month, 12% return, and a 20-year horizon, a 10-year delay reduces your corpus from ₹99.9 lakh to ₹24.0 lakh: a cost of ₹75.9 lakh. You lose 76% of your potential wealth. To catch up in the remaining 10 years, you would need to invest ₹41,670/month: more than four times your original SIP. This is why the calculator includes a constructive "What to do if you've already delayed" section: even a 10-year delay is not fatal if you start now, use step-up SIPs, and deploy any idle cash immediately.