The answer in plain English
A monthly-payment formula with a single fixed P does not describe a plan whose payment changes every year. Model the cash flow month by month, apply the increase at the intended anniversary, and state whether payments occur at the start or end of each month. Affordability matters as much as the final displayed number.
What to check
- Specify an annual percentage increase or an annual rupee increase; they produce different cash flows.
- Check the exact month when each increase begins.
- Show total contributions, projected value and assumed-return gains as different figures.
- Test whether later instalments remain affordable if income growth disappoints.
A useful comparison
| Illustrative year | Monthly instalment after 10% annual step-up | Annual contribution |
|---|---|---|
| 1 | ₹5,000 | ₹60,000 |
| 2 | ₹5,500 | ₹66,000 |
| 3 | ₹6,050 | ₹72,600 |
Make the distinction clear
These contributions total ₹1,98,600 over three years, before considering any return. They are not the same as contributing ₹5,000 for all 36 months, which totals ₹1,80,000. A fair comparison explains that ₹18,600 of the difference is additional money invested. Use the linked step-up calculator to change the increase rule and compare several assumed returns, with inflation and costs shown explicitly.
One final question before acting
Does the figure or document match the exact scheme, plan, option, period and purpose in your question? Keep the source date with the answer. For a real transaction or personal decision, the current scheme documents and your own records take priority over a saved educational example.