Is the 50/30/20 rule based on gross or net income?

Net , your take-home pay after taxes and payroll deductions. Splitting gross income overstates what you can spend, because the tax portion never reaches your account.

What if my needs are more than 50%?

Common in high-rent cities. Treat 50/30/20 as a target, not a law: trim the 30% wants first, keep the 20% savings protected if you can, and revisit needs (housing, insurance) over time. The split is a compass, not a cage.

Where should the 20% actually go?

In rough order: a small starter emergency fund, then high-interest debt, then a fuller emergency fund and long-term investing. The goal is for the 20% to grow , not just sit idle.

Why do I still run out of money with a "correct" budget?

Because a monthly budget hides timing. If rent and a card payment both land before payday, your balance can dip negative mid-month even though the monthly totals balance. Projecting your balance day by day catches that before it happens.

Does Wiggle Budget enforce 50/30/20?

No , it shows you reality. You set your own categories and recurring bills, and Wiggle projects your balance forward so you can see whether your real split holds up over time and what is genuinely safe to spend.

The 50/30/20 budget rule , a simple split that actually sticks

The 50/30/20 budget rule: split take-home pay into 50% needs, 30% wants, 20% savings , and how to make it stick