A budget is not a restriction but a map: it shows where money goes so you can decide where you want it to go.
Five steps
- Start from net income: what reaches your account each month.
- Review three months of transactions so nothing is forgotten.
- Spread annual costs (insurance, taxes, fees) by dividing them by 12.
- Label each expense: need, want, or saving/debt.
- Compare and adjust: decide which items you can cut.
The 50/30/20 rule
It was popularised by Elizabeth Warren and Amelia Warren Tyagi in the book All Your Worth (2005). It suggests splitting net income as follows:
- 50% needs: housing, utilities, basic groceries, transport, insurance, minimum debt payments.
- 30% wants: leisure, eating out, travel, subscriptions.
- 20% saving and extra debt repayment.
On $3,000 net that would be $1,500 for needs, $900 for wants and $600 for saving.
Its limits
It is a reference, not a law. Where housing is expensive, needs easily exceed 50%; on higher incomes it can make sense to save more than 20%. Use it to spot imbalances, not to judge yourself.
Put it into numbers
In the budget calculator you can label each expense and compare your split with the reference, and the savings calculator shows how long a goal will take.
Sources and references
- Warren, E. & Warren Tyagi, A. (2005). All Your Worth: The Ultimate Lifetime Money Plan. Free Press.