How much money do you actually need to make $500/month?
This week I had three separate calls with people who want to build a second income from their savings. All three asked the same question within the first half hour:
"How much money do I actually need to start?"
It boils down to to this simple math formula.
The one-line formula
Capital needed = (Monthly Income Target x 12) ÷ Return on Capital
A quick table to illustrate it.
| Income source | Annual return | Capital for $500/month |
|---|---|---|
| Singapore Savings Bond (10-yr avg, Aug 2026 issue) | 2.06% | ~$291,000 |
| US 10-year Treasury | ~4.7% | ~$128,000 |
| Singapore REITs (sector average yield) | 5.9% | ~$102,000 |
| Selling put options (my personal experience) | ~18% | ~$33,000 |
Based on my personal experience of trading options in the past 3 years, the average return on capital is ~18%.
Therefore, I target about 1.5–2% of my capital in income per month from selling options — I use 1.5% for planning because I'd rather promise myself less and be surprised on the upside.
| Income You want per month | You need roughly |
|---|---|
| $500 | $33,000 |
| $1,000 | $66,000 |
| $2,000 | $133,000 |
| $5,000 | $333,000 |
So a working professional with $30–50k of savings set aside can realistically build a $500/month income stream.
Two caveats, because I promised you honesty:
- 1.5% a month ≈ 18–24% a year on that pot. That is a very good return. Don't let anyone tell you it's easy to beat — chasing more than this is how people blow up.
- Some months offer nothing. This past May, the market gave me almost no good opportunities, so I mostly sat out and made close to $0 that month. The target is an average, not a subscription.
Where this fits: the two engines
Here's the mental model that changed everything for me. Your money should run on two separate engines:
Engine 1 — the growth engine. Your long-term portfolio: index funds, bought every month, held for 10+ years, never touched. This is where wealth compounds. Boring on purpose.
Engine 2 — the income engine. A separate, smaller pot that generates monthly cash by selling options on quality stocks. This is where the 1.5% a month comes from.
The magic is what you do with Engine 2's output: you feed it into Engine 1.
Say you already invest $500 a month into an index fund. Now your income engine produces another $500 a month, and you invest that too. You've just doubled the speed of your wealth flywheel — without earning a bigger salary, and without taking wild risks in your long-term portfolio.
And if you ever lose your job (I watched three years of tech layoffs before leaving mine), Engine 2 keeps producing — which means Engine 1 keeps growing even when the salary stops. One of my earliest students lived exactly this: he lost his job last year, and his income engine let him keep investing and help cover his family's expenses while he searched.
Don't start at $200,000
The formula tells you where you're heading, not where you start. The progression I've watched work, over and over:
- Get started (trades 1–5). Small capital. The goal is not income — it's doing your first real trades with real money and surviving the emotions.
- Get good (trades 5–20). You now know what to do when a trade goes against you. You stop asking others to check your homework.
- Then scale. Only now do you add serious capital. Several of my students started at $50k and grew to $200k on their own — but only after stage 2. If they'd started at $200k, the fear would have frozen them on day one.
There's no skipping. The skill compounds first; the capital compounds after.
The bottom line
Work out your number. Divide by 1.5%. That's your destination. Then start far smaller than that, and let the skill — not greed — decide when you scale.
Not financial advice — just the arithmetic and the process I use myself and teach. Your returns depend on your decisions.