calctube
📚 Guide 📈 Investing Updated2026-07-21

The 10% raise that doubles your SIP.

⚡
Quick answer

A flat ₹10,000/month SIP for 20 years at 12% builds ₹1.00 Cr. Raise it just 10% a year (roughly your annual salary hike) and it builds ₹1.99 Cr, about ₹99.0 L more. You invest ₹68.7 L instead of ₹24.0 L, but the extra also compounds for decades.

Same start, wildly different finish

Most people set a SIP amount once and leave it untouched for years, but their salary doesn't stay flat, so the SIP quietly shrinks as a share of income. A step-up SIP fixes that by raising the monthly amount a set percentage each year. Both plans below start at the same ₹10,000/month and earn the same 12%; the only difference is how fast the contribution grows. Here's ₹10,000/month over 20 years at four step-up rates, every figure computed:

Annual step-up Total invested Final corpus Extra vs flat
None (flat) ₹24,00,000 ₹99,91,479 –
5% / year ₹39,67,914 ₹1,37,37,623 +₹37,46,144
10% / year ₹68,73,000 ₹1,98,88,715 +₹98,97,236
15% / year ₹1,22,93,230 ₹3,02,55,942 +₹2,02,64,462

Monthly SIP invested at the start of each month, compounded at 12% p.a. (1% monthly). Step-up applied at the start of each year. Illustrative. Actual returns vary. Not investment advice.

Why the gap is bigger than the extra you invest

Look closely at the 10% row: you invest ₹44.7 L more than the flat plan, but you end up with ₹99.0 L more. That's not a rounding quirk. It's compounding rewarding money that arrives early. A step-up front-loads your extra contributions into the early-to-middle years, exactly when there's still a decade or two of growth ahead. By the final year your SIP has climbed to about ₹61,159/month, but those late contributions barely have time to grow; it's the raises in years 3 through 10 that do the real work. The takeaway is simple and powerful: step up early and pre-commit it, so the increase happens automatically instead of depending on you to remember. Even a modest 5% step-up beats a flat SIP by ₹37.5 L here. The direction matters more than the exact number.

❓ FAQ

Common questions.

What is a step-up (or top-up) SIP?
A step-up SIP automatically raises your monthly investment by a fixed percentage every year, instead of keeping it flat for life. The logic is simple: your income rises over time, so your investing should too. Starting at ₹10,000/month with a 10% annual step-up means you invest ₹10,000 in year one, ₹11,000 in year two, and so on, reaching about ₹61,159/month by year 20. Over 20 years at 12% that grows to roughly ₹1.99 Cr, versus ₹1.00 Cr if you'd never increased the amount.
How much more does a step-up SIP actually earn?
A lot, because the extra money you add early also gets decades to compound. In our example a flat ₹10,000/month SIP over 20 years at 12% builds ₹1.00 Cr from ₹24.0 L invested. The same SIP stepped up 10% a year builds ₹1.99 Cr from ₹68.7 L invested, about ₹99.0 L more in your pocket. You put in more, yes, but the corpus grows faster than the contributions because the early increases compound the longest.
Should I step up my SIP or just start with a bigger amount?
If you can genuinely afford a bigger SIP today, starting high always wins. Money invested earliest compounds longest. Step-up SIPs exist for the far more common situation: you can't afford ₹25,000/month now, but you know your salary will grow. Rather than staying stuck at your starting amount for 20 years, a step-up lets you begin at what you can afford and scale automatically as your income rises. It's the realistic middle path between "invest a fortune now" (you can't) and "never increase" (you'll under-save).
Is a 10% annual step-up realistic?
For most salaried investors, yes. It's roughly matched to typical annual salary hikes and inflation, so the SIP stays about the same share of your take-home pay each year. If your raises are smaller, a 5% step-up still meaningfully beats a flat SIP; in our table it lifts the corpus to ₹1.37 Cr versus ₹1.00 Cr flat. The key discipline is to actually pre-commit the step-up (most platforms let you set it once), so the increase happens automatically instead of relying on you to remember to raise it.
Does a step-up SIP require a bigger total commitment?
Yes. That's the point, and it's why it works. Over 20 years the flat plan invests ₹24.0 L total; the 10% step-up invests ₹68.7 L. But because your income is also growing, each year's higher SIP stays affordable as a percentage of what you earn. The extra ₹44.7 L you contribute turns into an extra ₹99.0 L of corpus. The gap is wider than the extra you put in, which is compounding doing the heavy lifting on money you added early.
🔗 Run the numbers
📈
SIP Calculator
⚖️
SIP vs Lump Sum
🧮
The Rule of 72