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Lumpsum ↔ SIP Converter
Find the SIP amount equivalent to a lumpsum investment — or the lumpsum needed to match your SIP corpus — for the same target, rate and tenure.
About this converter
This converter helps you answer a common question: if I have ₹X today, what monthly SIP would produce the same outcome? Or conversely, if I commit to ₹Y monthly SIP, what lumpsum invested today would match it? It uses the SIP future-value formula and compares against lumpsum compounding at the same rate over the same period.
Three real-world Indian use cases. First, windfall planning: an inheritance, ESOP vesting, or bonus you don’t need immediately. The converter shows whether spreading it as SIP over 12-36 months (rupee cost averaging) produces a meaningfully different outcome than deploying it once. Second, retirement gap analysis: figuring out whether the lumpsum corpus you already have is “equivalent” to the SIP commitment you’re considering. Third, NRI funding decisions: NRIs often choose between sending a one-time large remittance or smaller monthly transfers — the math is the same.
At 12% expected returns over 10 years, a ₹10 lakh lumpsum invested today equals roughly ₹14,500/month SIP for the same period. The conversion factor changes with horizon: shorter horizons make lumpsum dominate; longer horizons let SIPs catch up via consistent contributions.
For the same corpus, lumpsum and SIP are equivalent when their FV matches. Lumpsum benefits from compounding from day 1; SIP averages cost over time (rupee cost averaging). Lumpsum is better when markets are low; SIP is safer when markets are at highs.
Lumpsum vs SIP — The Math of Deployment
The real question isn’t which is better, but when. A lumpsum deployed at a market low compounds for the full period. A SIP deployed gradually averages out timing risk through rupee-cost averaging. Over 10+ year horizons, the difference shrinks; over short horizons, deployment timing dominates.
This converter helps you express either as the equivalent of the other. If you have ₹10 lakh to deploy today, what monthly SIP over the next 5 years produces the same final corpus at the same expected return? Or conversely, ₹15,000/month SIP for 10 years is roughly equivalent to deploying what lumpsum today?
Lumpsum-to-SIP Conversion Table (12% Return)
| Lumpsum Today | Equiv. SIP for 5 Yrs | Equiv. SIP for 10 Yrs | Equiv. SIP for 20 Yrs |
|---|---|---|---|
| ₹1 Lakh | ₹1,470/mo | ₹535/mo | ₹100/mo |
| ₹5 Lakh | ₹7,350/mo | ₹2,675/mo | ₹500/mo |
| ₹10 Lakh | ₹14,700/mo | ₹5,350/mo | ₹1,000/mo |
| ₹25 Lakh | ₹36,750/mo | ₹13,375/mo | ₹2,500/mo |
| ₹50 Lakh | ₹73,500/mo | ₹26,750/mo | ₹5,000/mo |
| ₹1 Crore | ₹1,47,000/mo | ₹53,500/mo | ₹10,000/mo |
Conversion uses identical-corpus assumption at 12% annual return.
SIP + Lumpsum Hybrid Wins Most Often: If you have a windfall, deploying 30-50% as lumpsum and SIPing the rest over 12-24 months captures most of the time-in-market benefit while reducing timing regret. Pure-lumpsum maximises upside if you’re confident in entry; pure-SIP minimises regret if you’re not.
Real-World Scenarios
Example 1: Inheritance of ₹50 Lakh
Family member receives ₹50 L. Pure lumpsum into equity at 12% over 20 years = ₹4.82 Cr. Pure SIP equivalent ₹5,000/month for 20 years = ₹49.9 L final — much less because compounding window is shorter. Lumpsum wins here because time was always going to be 20 years; deploying upfront maximises the runway.
Example 2: Bonus of ₹3 Lakh
Annual bonus of ₹3 L. Equivalent SIP for next 5 years at 12% = ₹4,410/month. If you can’t (or don’t want to) commit ₹4,400 monthly, deploy as lumpsum. If you’d rather smooth the deployment, set up a STP (Systematic Transfer Plan) from a debt fund into equity.
Example 3: ESOP Vesting
₹12 L ESOP proceeds after-tax. Hybrid approach: ₹6 L immediate lumpsum + ₹15,000/month SIP for 3 years (= remaining ₹6 L spread over 36 months). Captures market upside but cushions against immediate-after-windfall regret if markets drop.
Decision Framework
- Lumpsum wins when: Time horizon > 7 years, market is in or near a corrective phase, you have high conviction.
- SIP wins when: You’re nervous about timing, market is at all-time highs, or the money will arrive in monthly chunks (salary).
- STP is the safe middle: Park lumpsum in a liquid/ultra-short fund. Set up 6-12 month STP into equity. Reduces timing risk while staying invested.
- Tax is the same: Both lumpsum and SIP face the same LTCG rules — 12.5% on equity gains above ₹1.25 L per year held >12 months.
- Behavioural reality: Most investors underestimate their regret tolerance. If you’d panic-sell after a 20% drop with a lumpsum, SIP is more behaviourally sustainable.