If you're not in a rush, waiting a few years before a big purchase — and investing the money you'd have spent in the meantime — can make a bigger difference than most people expect. Here's a real example of the tradeoff.
Say you're considering a $35,000 car, but you're not in a hurry. Instead of buying now, you save $400 a month for 3 years, investing it at a 10% average return, then buy the car with cash. We'll look at where things stand 15 years from today either way.
You buy the car today. By year 15, typical depreciation puts its value at around $3,057 — that's the entire outcome of this path. Nothing else happens to that money; it went into a depreciating asset.
| Step | Amount |
|---|---|
| Saved after 3 years of investing $400/month | $16,713 |
| Car bought at year 3; value by year 15 (12 years of aging) | $4,978 |
| Savings kept compounding (never spent on the car) | $55,213 |
| Total position at year 15 | $60,191 |
Waiting comes out about $57,134 ahead in this example — almost entirely because the $400/month kept compounding for the full 15 years instead of being spent on a car that was always going to lose most of its value anyway.
The car eats itself — whether you buy it now or in 3 years, it depreciates the same way, so the "buy now" path never really has a chance to grow. Meanwhile, the money that would have gone to the car keeps compounding the entire time in the "wait" path, since it's never redirected to fund the purchase. The comparison is really "invest this money for 15 years" versus "invest this money for 3 years, then let a car eat the rest" — and compounding rewards the longer runway.
This works best for depreciating assets, like cars. For something that appreciates — a house, for instance — waiting means missing out on years of the asset's own growth too, so the comparison is closer and depends heavily on your specific rate assumptions. It also assumes real discipline: the savings have to actually get invested, not just sit as an intention. If a "wait 3 years" plan turns into spending the money on something else entirely, none of this math applies.
The calculator's wait-vs-buy-now comparison lets you test this with your own price, savings amount, and timeline — for a car, a house, or anything else.
This is an illustrative example, not a prediction. Market returns vary year to year and aren't guaranteed — see the assumptions behind these numbers for the full picture.