Guide
A household budget that survives a normal month
A budget is a plan for money you already have, not a personality test. Write down income, list bills, then decide what is left for saving and for the rest of life.
Write the numbers down
List take-home pay for a typical month. Then list fixed costs: housing, insurance, transport passes, minimum debt payments, childcare. Then variable costs: groceries, fuel, phones. You cannot cut what you have not named.
A starting split
The 50/30/20 rule is a starting point, not a law: about half of take-home pay toward needs, about 30% toward wants, about 20% toward saving and extra debt payments. If housing eats more than half your income, the split will not fit — change the percentages so they match your city, not a slogan.
Review without drama
Once a month, compare the plan with what actually left the account. If one category is always over, either raise its line or cut it on purpose. A budget that you abandon after two weeks is worse than a rougher plan you keep.