Calculate the monthly investment timeline required to hit your $100,000 savings target.
Quick answer: To reach a savings goal of $100,000 in United States over 25 years, you would need to invest roughly $75 per month (assuming a 10% annual return). Use the calculator to adjust your timeframe and see exactly how compound interest accelerates your path to $100,000.
$100,000 is your target. But at 3% inflation, $100,000 in 25 years will only buy what $47.76K buys today. That gap is why this calculator works out both the headline target and what it is really worth, not just the headline number.
There are two ways to reach $100,000: a flat SIP where you invest the same amount every month (so it buys less each year), or a step-up SIP where you raise your monthly amount with inflation (so your saving keeps its real value). The table below shows the monthly SIP each path needs across five common timelines.
| Years | Flat SIP / month | Total invested (flat) | Step-up SIP / month (start) | Total invested (step-up) |
|---|---|---|---|---|
| 10 yrs | $484 | $58.1K | $433 | $59.51K |
| 15 yrs | $239 | $43.07K | $204 | $45.45K |
| 20 yrs | $131 | $31.34K | $107 | $34.43K |
| 25 yrs | $75 | $22.42K | $59 | $25.89K |
| 30 yrs | $44 | $15.79K | $34 | $19.34K |
Based on a 10% expected yearly return and a 3% yearly increase on the step-up column. The longer you give it, the more compounding does for you. The monthly SIP for 30 years is usually a small fraction of what 10 years needs, but you end up putting in more overall because you keep going for longer.
We solve for the monthly SIP you need to start with:
To have what $1,000,000 buys today in 20 years (at 2.5% inflation), you need $1,638,616 in the future. At a 10% expected return, that means investing $2,165 a month.
See what your monthly SIP could grow to, and what it will actually buy after inflation.
Find out what a future amount of money is really worth today, once you account for inflation.
Plan for Financial Independence Retire Early (FIRE) and find the retirement savings number you really need after inflation.