Find out the SIP needed to reach a goal, after increasing the goal's value to account for rising prices between now and then.
The goal amount is first inflated to what it will actually cost in the future.
The required monthly SIP is then calculated against that larger, inflation-adjusted number.
Inflated goal: Goal × (1 + inflation)ⁿ
Required SIP: Reverse SIP formula on the inflated goal
Why inflate the goal before calculating the SIP?
A car that costs ₹10 lakh today will cost more in 10 years, because of inflation. If you plan around today's price without adjusting for this, you will fall short of your real goal.