SIP & Lump Sum Calculator

A Systematic Investment Plan (SIP) spreads your investment across regular monthly instalments, while a Lump Sum puts the entire amount to work on day one. Both grow through compounding, but the shape of that growth is different: a lump sum benefits from the full principal compounding for the whole period, while a SIP builds up gradually, so each instalment compounds for a shorter time than the one before it.

This calculator adds an annual step-up option to the SIP side, since most people's income — and therefore their savings capacity — rises every year. Instead of keeping the same monthly amount for the entire tenure, a step-up SIP increases the instalment by a fixed percentage each year: this year's SIP = last year's SIP × (1 + step-up%). Even a modest 10% yearly step-up compounds into a meaningfully larger corpus over a long horizon.

Two extra numbers are shown alongside the maturity value. The Wealth Multiplier is Maturity Value ÷ Total Invested — a 3× multiplier means your money tripled. Approx. Annualized Growth backs out a simplified yearly growth rate, useful for comparing across different tenures than the maturity value alone — but for a SIP it isn't a true CAGR or XIRR, since contributions are spread across many months rather than invested as a single lump sum at the start.

Treat the maturity value here as an illustrative estimate rather than a guarantee. Actual mutual fund and market-linked returns fluctuate year to year and are never a flat, constant rate the way this calculator assumes; the figures shown are for planning purposes only and do not constitute investment advice.

Monthly SIP Return Table (No Step-Up)

The table below illustrates how a flat monthly SIP (no annual step-up) grows over different tenures at a few common assumed annual return rates, compounded monthly. Figures are shown in Indian numbering (L = Lakh = 100,000; Cr = Crore = 10,000,000) as an illustrative example, but the multiplier and annualized growth outcomes are identical proportionally in any currency — a $5,000/month SIP at the same rate and tenure grows by the same multiple as a ₹5,000/month one. Use the calculator above with your own currency and amount for a precise, localised projection.

Figures rounded to illustrate the range; use the calculator above with your own numbers for a precise projection. L = Lakh (1,00,000), Cr = Crore (1,00,00,000).

The Effect of Inflation on Your Maturity Value

Every projection above is shown in nominal currency units — the actual number you'd see in your account — but nominal money buys progressively less over time as prices rise. To understand what a future corpus is really worth in today's purchasing power, divide it by (1 + inflation rate)^years. For example, an amount worth 1 crore (10,000,000) in India's numbering convention received 20 years from now, discounted at a typical 6% long-run inflation assumption, is worth roughly 31.2 lakh (3,120,000) in today's terms — the same discounting math applies at any amount, in any currency, once you substitute your local long-run inflation rate. This is why a headline maturity value can look impressive while still falling short of a real-world goal like retirement or a child's education if the assumed return rate isn't comfortably ahead of inflation — a common planning approach is to focus on the "real return" (return rate minus inflation rate) rather than the nominal return alone when judging whether a goal will actually be met.

Lump Sum vs SIP: A Side-by-Side View

Putting the same total money to work as a lump sum versus spreading it as a SIP produces different outcomes depending on market direction during the investment period. In a steadily rising market, a lump sum generally ends up ahead because the full principal has been compounding since day one, while SIP instalments arrive gradually and each compounds for less time than the first. In a volatile or choppy market, a SIP often does relatively better because it practices rupee-cost averaging — buying more units when the price is low and fewer when it's high — which smooths out the effect of short-term dips. Neither approach is universally superior; the right choice generally depends on whether you have the full amount available today, your comfort with short-term volatility, and your investment horizon. Many investors choose a blended approach: deploying a portion as a lump sum and continuing the rest as a monthly SIP.

Step-Up SIP: Why It Matters More Than It Looks

A step-up (or "top-up") SIP increases your monthly contribution by a fixed percentage every year, typically timed to your annual salary increment. Because each year's higher instalment still benefits from all the remaining compounding years ahead of it, even a modest step-up compounds into a substantially larger corpus than a flat SIP of the same starting amount. For instance, a ₹10,000 SIP with no step-up versus the same ₹10,000 SIP with a 10% annual step-up over 20 years can differ significantly in final corpus, although the contribution requirement rises substantially over time — the difference comes from directing more money in later years when the base corpus is already larger and compounding faster. A step-up SIP is generally a better fit for anyone expecting their income to grow over time, since it avoids the common problem of a fixed SIP amount losing relative significance as salary rises.

Tax Notes: Check Your Local Capital Gains Rules

How SIP and lump-sum gains are taxed differs significantly by country — this calculator projects pre-tax growth only, and doesn't apply any tax rule automatically. A general pattern across most jurisdictions (India, the US, UK, and others) is that holding period matters: gains on investments held longer than a threshold are usually taxed at a lower, "long-term" rate than gains realised sooner. Whether SIP instalments are treated as one continuous investment or as separate purchases for tax purposes (affecting each instalment's own holding period) also varies by country and fund structure. Always confirm the current rules with a local tax advisor before assuming a tax outcome — the details below are India-specific as an illustrative example.

Capital gains from equity-oriented mutual funds in India are taxed based on holding period and the applicable rules at the time of redemption. As a general framework (always confirm current rates with a tax advisor or the latest Finance Act, since these thresholds and rates are revised periodically): gains on units held for more than 12 months are treated as Long-Term Capital Gains (LTCG), while gains on units held for 12 months or less are treated as Short-Term Capital Gains (STCG), with STCG typically taxed at a higher rate than LTCG. For SIP investments specifically, each monthly instalment is treated as a separate purchase for tax purposes — meaning the holding period (and therefore whether a given instalment's gain is long-term or short-term) is calculated independently for every instalment, not for the SIP as a whole. Debt-oriented mutual funds are taxed under a different regime than equity funds, so the same LTCG/STCG treatment does not automatically apply — check the specific fund category before assuming a tax outcome. This section is a general educational overview, not tax advice; consult a qualified tax professional for guidance specific to your situation and country.

Salaried engineers in India already have one long-term investment running by default: EPF, deducted automatically from every payslip. Because it's mandatory and low-risk, it's tempting to treat it as the whole retirement plan. In practice, EPF provides a relatively low-risk retirement component — with the applicable interest rate determined under the prevailing EPF framework rather than fixed indefinitely — and is usually the "safety" sleeve of a plan, not the growth engine; equity-oriented SIPs, held over a long horizon, have historically compounded faster, though with market-linked ups and downs EPF doesn't have.

A practical split many engineers use: keep EPF contributions untouched as the relatively low-risk base (verify the projection with the EPF Calculator), and route a separate, voluntary SIP toward equity mutual funds for growth. Field, site, and maintenance engineers whose income includes variable components — overtime, site allowance, project bonus — often direct that variable portion into the SIP specifically, since it can be topped up or paused more flexibly than EPF.

Why this matters for an engineering career specifically: engineering salaries frequently see a sharper early-career ramp (first 5–10 years) followed by flatter growth unless a role shifts into management or a specialised/niche technical track. A step-up SIP started early, timed to those early raises, captures more compounding years than the same contribution started later — which is why a common planning approach is to start a modest SIP alongside EPF from the first job, rather than waiting until EPF alone starts to look insufficient closer to retirement.