How the 50/30/20 budget calculator works
Why take-home, not gross
Budgets that start from gross income die at the first paycheck: the money that arrives is net of taxes, insurance, and elections, and the plan must live inside it. 50/30/20 on take-home is self-consistent — every line is fundable from the deposit that actually lands.
The categories, defined honestly
Needs: housing, utilities, groceries, transport, insurance, minimum debt payments — the bills that exist regardless of mood. Wants: dining out, entertainment, subscriptions, hobbies — anything you could cancel without consequence. Savings: emergency fund, retirement, investing, and extra debt payments. The honest audit usually finds wants sneaking into needs ("groceries" that include $200 of wine).
When needs exceed 50%
High-cost cities routinely produce 60–70% needs ratios. The budget does not fail — it informs: either needs shrink (roommates, smaller place, cheaper transport) or income grows, because 70/20/10 is not a plan, it is a countdown. The calculator's percentage output is the mirror that makes the trade-off explicit.