Key idea
Under the hood, an SIP is a standing instruction: on a fixed date, a fixed amount is invested for you, buying units at that day's price.
You met SIPs as a concept; here is the mechanism. A Systematic Investment Plan is an instruction to your bank and fund to invest a fixed amount, on a fixed date, at a fixed frequency (usually monthly). On each date, the money is auto-debited and used to buy fund units at that day's NAV.
The monthly cycle
| Step | What happens |
|---|---|
| 1 On your chosen date, the amount is auto-debited | |
| 2 | It buys units at that day's NAV |
| 3 | Units are added to your holding |
| 4 | It repeats, automatically, every period |
Why the automation is the point
The power of an SIP is that it removes decisions and emotion. You are not choosing when to invest or judging whether the market is high; the standing instruction simply acts, every month, regardless of mood or headlines. This is what enforces the "pay yourself first" and "stay invested" habits from earlier domains, without relying on willpower.
An SIP turns investing into a background utility, like a monthly bill you pay to your future self. Set the date just after payday, and it runs itself.
Finished reading?
Marking this complete counts today, and your streak becomes day 1.