A Quick Refresher on Reward Points
With a credit card offering 1% cash-back in points, spending 100,000 yen per month earns you 1,000 points (worth 1,000 yen) each month - 12,000 points per year. Most people redeem these points for convenience store purchases or online shopping discounts, treating them as a small bonus to be consumed.
Recently, however, services like Rakuten Points and V-Points in Japan allow you to purchase mutual funds with your points. Instead of consuming your points, you can invest them - feeding them into the compound interest cycle.
How Much Are Invested Points Worth After 10 Years?
If you invest 1,000 yen worth of points each month in an index fund returning 5% annually, after 10 years you would have approximately 155,000 yen. Your total point contributions amount to 120,000 yen, so the investment gains are about 35,000 yen. After 20 years: 240,000 yen contributed, approximately 410,000 yen total. After 30 years: 360,000 yen contributed, approximately 830,000 yen total.
"Only 830,000 yen?" you might think. But remember - this is money generated from points that were essentially free. Your out-of-pocket cost was zero; you simply used your credit card for everyday purchases. Moreover, the gains from point investments themselves compound, so the money keeps growing inside the fund. Reinvesting points is a small but reliable entry point into compound interest.
Three Pitfalls of Point Investing
First, do not spend more just to earn points. If you make unnecessary purchases for the sake of a 1% reward, the other 99% is wasted spending. Points should be a byproduct of purchases you would make anyway - never the reason for spending.
Second, watch out for point expiration dates. Points that expire before you invest them are worthless. If you start point investing, set up automatic monthly transfers so points flow into your investment account without manual intervention. Third, check the fees. Some services offer only mutual funds with higher-than-average expense ratios for point purchases. If two funds track the same index, always choose the one with the lowest expense ratio.books on credit card optimization also cover how to choose the best card for maximizing point returns.
Next Steps: Start Reinvesting Your Points Today
First, check whether your primary credit card's points can be used for investing. In Japan, Rakuten Card holders can invest through Rakuten Securities, and Sumitomo Mitsui Card holders can use SBI Securities. Next, enable automatic point investment so your monthly points flow into a fund without any manual effort. The amounts are small, but knowing that "bonus points are compounding in my account" is a powerful motivator to keep investing. Points spent are gone; points invested grow.