What is a step-up SIP?

A step-up SIP, also called a top-up SIP, is a recurring investment where the contribution amount increases at a set interval, commonly once per year.

Why compare step-up SIP with regular SIP?

The step-up result is larger partly because the investor contributes more principal. The regular SIP comparison shows how much of the difference comes from extra saving versus extra compounding.

Are the projected returns guaranteed?

No. The calculator uses user-supplied return assumptions. Actual equity or fund returns can be lower, higher, or negative over shorter periods.

Can I change contribution timing?

Yes. Beginning-of-month and end-of-month contributions are separate assumptions because the extra month of compounding changes the final corpus.

§ Tools / Series 03 · Personal finance

Step-Up SIP Calculator

The realistic version of long-term investing: a top-up SIP whose monthly contribution rises every year with your salary. For a starting amount, an annual step-up, a return, and a tenure it returns the corpus. And, unlike most free tools, it shows you exactly how much of the bigger corpus is extra principal versus extra compounding, and what your monthly SIP grows to.

§ Market-linked, not a fixed-rate product

This projects rising periodic investing under an assumed return. Equity returns are not guaranteed and the smooth curve is not a forecast. For a flat contribution use the SIP calculator; to solve a target from day one, the goal-based SIP calculator.

Modes

Loop

Not closed-form

3-way

Comparison split

2-dir

Goal-solve

Methodology

§ Start with a preset

Three starting points, adjust anything after.

Mode

Currency

01Starting contribution

Initial amount per contribution

₹

02Annual step-up

Annual step-up rate

%/yr

Typical Indian salary-hike anchor is 10–15%.

ends at ₹52,768 / month in year 10

03Return & tenure

Expected annual return

Periodic rate: 1.0000% per monthly

Tenure

yrs

Showing the four reference inputs. Switch to Advanced for currency, frequency, fixed-₹ step-ups, caps, lump sum, and drags.

Step-up SIP corpus

₹6,178,090.72

₹15,000 monthly stepping up 15%/yr for 10 years at 12%. By year 10 you invest ₹52,768 per month.

Total invested₹3,654,669

Estimated earnings₹2,523,421

Final month SIP₹52,768

§ Step-up vs regular SIP

What the step-up adds over the same starting amount, flat

Same ₹15,000 start, same 12% return, same 10y, one steps up, one doesn't.

Regular flat SIP

₹3,485,086

invested ₹1,800,000

Step-up SIP

₹6,178,091

invested ₹3,654,669

1.77× the flat corpus

Extra corpus from stepping up

+₹2,693,005

Extra principal you invested

₹1,854,669

69% of the gap

Extra compounding on it

₹838,335

31% of the gap

The bigger corpus is real, but most of it is usually just principal you put in. The step-up's own contribution is the compounding on that extra principal. This calculator surfaces the split so the headline number is honest.

Y0Y2Y4Y6Y8Y10

Step-up SIP Regular flat SIP Step-up advantage

Growth multiple

1.69×

corpus / invested

Absolute return

69.0%

earnings / invested

Average contribution

₹30,456

across 120 periods

Money-weighted (XIRR)

12.81%

right measure for rising flows

After-fee corpus

₹6,178,091

no fee modeled

Periodic rate

1.0000%

per monthly · nominal

§ Contribution trajectory

What your monthly SIP grows to: ₹15,000 → ₹52,768

₹15,000

₹52,768

Y10

flat ₹15,000

Monthly monthly contribution per year · the dashed line is the flat SIP that never moves.

§ Invested vs earnings

How much of the corpus is your money vs market growth?

Y0Y2Y4Y6Y8Y10

Total invested Estimated earnings

§ Goal-solve · both directions

Hit a target corpus: solve the starting SIP, or solve the step-up rate

Holds your return, tenure, timing, and the other lever fixed; the calculator engine solves it.

Target corpus

₹

Holding step-up 15%/yr, return 12%, tenure 10y.

Solving…

§ Scenarios

Bear, base, bull: 4% either side of 12%

Bear8.0%

₹5,123,266

earnings ₹1,468,596

Base12.0%

₹6,178,091

earnings ₹2,523,421

Bull16.0%

₹7,542,954

earnings ₹3,888,284

§ Sensitivity

Return × step-up rate: the corpus across nearby assumptions

Rows: expected return ±. Columns: annual step-up rate. The base case is outlined.

Return ＼ Step-up	5%	10%	15%	20%	25%
9.0%	₹3,548,815	₹4,345,772	₹5,362,531	₹6,657,776	₹8,304,058
10.5%	₹3,848,394	₹4,685,903	₹5,750,870	₹7,103,492	₹8,818,110
12.0%base	₹4,180,413	₹5,061,489	₹6,178,091	₹7,591,990	₹9,379,392
13.5%	₹4,548,756	₹5,476,678	₹6,648,634	₹8,128,038	₹9,993,029
15.0%	₹4,957,789	₹5,936,129	₹7,167,483	₹8,716,973	₹10,664,752

§ Year-by-year schedule

The rising monthly amount, year by year

Year	Monthly amount	Invested this year	Growth	Closing
Y1	₹15,000	+₹180,000.00	+₹12,139.92	₹192,139.92
Y2	₹17,250	+₹207,000.00	+₹38,329.06	₹437,468.98
Y3	₹19,837	+₹238,050.00	+₹71,537.06	₹747,056.04
Y4	₹22,813	+₹273,757.50	+₹113,208.71	₹1,134,022.25
Y5	₹26,235	+₹314,821.12	+₹165,055.20	₹1,613,898.58
Y6	₹30,170	+₹362,044.29	+₹229,100.45	₹2,205,043.32
Y7	₹34,696	+₹416,350.94	+₹307,735.06	₹2,929,129.32
Y8	₹39,900	+₹478,803.58	+₹403,779.34	₹3,811,712.24
Y9	₹45,885	+₹550,624.12	+₹520,556.82	₹4,882,893.17
Y10	₹52,768	+₹633,217.73	+₹661,979.81	₹6,178,090.72

§ Formula trace

every output, derived

startingContribution = 15000 × ones = 15000.00 INR / monthly
periodicRate = R_net / 12 = 1.000000% (R_net after 0% fee)
periods N = 10 × 12 = 120 · 1×/yr step-up · beginning-of-period
scheduled[p] = 15000 × (1 + 15.00%)^stepIndex · stepIndex = floor(p / 12)
futureValue = 6178090.72 · totalInvested = 3654669.28 · earnings = 2523421.44
finalContribution = scheduled at last period = 52768.14 per monthly
extraCorpus = FV(step-up) − FV(flat) = 2693004.58
= extraInvestedPrincipal 1854669.28 + extraEarningsFromStepUp 838335.29
moneyWeightedReturn (XIRR) ≈ 12.81%

§ Input audit

no input silently ignored

annualStepUpPctused

contributionused

contributionUnitused

currencyused

expectedReturnPctused

feePctdefaulted

fixedStepUpAmountdefaulted

frequencyused

inflationPctdefaulted

initialLumpSumdefaulted

initialUnitdefaulted

maxStepUpCountdefaulted

misseddefaulted

rateConventionused

returnVariancePctused

stepUpCapAmountdefaulted

stepUpFreqdefaulted

stepUpTypedefaulted

taxPctdefaulted

tenureYearsused

timingused

§ Warnings

Of the extra corpus from stepping up, ≈69% is simply principal you invested, only ≈31% is extra compounding. A bigger corpus partly reflects bigger inputs.
Equity returns are not guaranteed. The smooth projection is not a forecast; tax and fee handling are simplified.

§ Golden references · locked in tests

Reference case: ₹15,000/month, 15% annual step-up, 12% return, 10 years, beginning-of-month, nominal APR.

Future value

₹61,78,090.72

Total invested

₹36,54,669.28

Final monthly

₹52,768.14

Extra corpus vs flat

₹26,93,004.57

Of that ₹26,93,004.57 extra corpus, ₹18,54,669.28 is extra principal and only ₹8,38,335.29 is extra compounding. End-of-month gives ₹61,16,921.51; reading 12% as effective-annual gives ₹59,98,399.86, same inputs, different convention.

§ Specialized siblings

SIP calculator →Goal-based SIP →Lump sum investment →Recurring deposit calculator →Compound interest calculator →

§ Same engine, headlessly

The simulation loop, the regular-SIP comparison, and the two-direction goal-solver are reachable as public stateless REST endpoints. MCP candidates exist behind an unpassed launch gate and are not publicly available. Source-backed prefill is unavailable in v1.

POST/api/v1/financial-calculators/step-up-sip/calculate

POST/api/v1/financial-calculators/step-up-sip/run · alias

GET/api/v1/financial-calculators/step-up-sip/schema · /defaults

GETSource-backed defaults · unavailable in v1

MCP preview · not launchedcalculate_step_up_sip · compare_step_up_sip_vs_regular_sip · solve_step_up_sip_goal · explain_step_up_sip_formula

methodology_version = financial-calculators.v1 · canonical = /en/tools/step-up-sip-calculator

§ FAQ

Four things worth knowing

Q01How much does my monthly SIP actually grow to?+

That is the eye-opening output. A ₹15,000/month SIP stepping up 15% a year ends the tenth year at ₹52,768.14/month, because year 2 is 15,000 × 1.15 = 17,250, year 3 is 19,837.50, and so on. The trajectory chart plots every year, and finalContribution is a first-class number, not a footnote.

Q02The step-up corpus is way bigger: is that all compounding?+

No, and this calculator refuses to let you believe it is. In the reference case the step-up corpus is ~77% larger than the flat SIP, but of the ₹26.93 lakh extra, ₹18.55 lakh is simply extra principal you invested, only ₹8.38 lakh is extra growth from compounding the larger contributions. The comparison splits the gap into extraInvestedPrincipal vs extraEarningsFromStepUp so the "step-up is magic" copy can not hide the inputs.

Q03Why a simulation loop instead of a formula?+

Because closed-form geometric-series formulas exist for a clean percentage step-up, but they break the moment you add a contribution cap, a fixed-rupee step-up, a maximum number of step-ups, missed months, or a non-yearly step-up frequency. The period-by-period loop handles all of those on one codepath, and with the step-up set to zero it reproduces a flat SIP exactly.

Q04Percentage step-up or fixed-rupee step-up: which should I use?+

Percentage scales with your salary: "raise my SIP 10% every year". Fixed-rupee adds the same amount each step: "add exactly ₹2,000/month every year regardless of base". Both are supported in Advanced mode, and both flow through the same loop, the same comparison, and the same goal-solver.

From calculation to research

Step-Up SIP Calculator

What the step-up adds over the same starting amount, flat

What your monthly SIP grows to: ₹15,000 → ₹52,768

How much of the corpus is your money vs market growth?

Hit a target corpus: solve the starting SIP, or solve the step-up rate

Bear, base, bull: 4% either side of 12%

Return × step-up rate: the corpus across nearby assumptions

The rising monthly amount, year by year

Four things worth knowing

Research the companies a growing plan could own