The 50/30/20 rule was popularized by Senator Elizabeth Warren in her book All Your Worth. It's the simplest way to organize your paycheck without going crazy with complicated spreadsheets.
What is the 50/30/20 rule?
A formula that divides your net income into three buckets:
- 50% for needs
- 30% for wants
- 20% for savings and investing
50% — Needs
Expenses you can't avoid without affecting your basic life:
- Housing (rent or mortgage payment)
- Utilities (water, power, gas, basic internet)
- Groceries
- Transport to work
- Required insurance
- Minimum debt payments
If this goes over 50%, the problem is structural: you're living above your means.
30% — Wants
Everything that improves your life but isn't essential:
- Restaurants and delivery
- Subscriptions (Netflix, Spotify, gym)
- Clothes beyond the basics
- Travel and vacations
- Hobbies
20% — Savings and investing
The part almost nobody respects, which is why people live financially stressed. It includes:
- Emergency fund (3-6 months of expenses)
- Investments (stocks, funds, crypto)
- Extra debt payments (beyond minimum)
- Savings for goals (house, car, retirement)
Example with a $3,000 salary
| Category | % | Amount |
| Needs | 50% | $1,500 |
| Wants | 30% | $900 |
| Savings | 20% | $600 |
Does it work with low salaries?
Yes, but the ratio may differ. If you earn little, needs can represent 70% and you only have 30% to split between wants and savings. The rule is a guide, not a law. The point is to always save something, even if it's just 5%.
How to apply it automatically
The day you get your paycheck, transfer 20% immediately to a savings account you don't see. What you don't see, you don't spend. MiCash lets you set category budgets and alerts you when you're close to the limit, so you don't have to do math in your head.
Variants of the rule
- 70/20/10: for those starting out, saving just 10%.
- 40/30/30: aggressive, for those pursuing early retirement (FIRE).
- 50/40/10: when paying off large debts.
Conclusion
The 50/30/20 rule isn't perfect, but it's simple enough that you'll apply it and flexible enough to fit your life. Start today, even with just 5% savings. The hard part isn't the formula — it's the discipline.