How this calculator works
The 50/30/20 rule is the simplest budget that actually holds up: take your after-tax income and send 50% to needs, 30% to wants, and 20% to savings and debt. Needs are the things you truly can't skip — rent or mortgage, utilities, groceries, insurance, transport, and minimum debt payments. Wants are the discretionary layer — eating out, streaming, hobbies, travel. The final fifth is the part that builds your future, whether that's an emergency fund, retirement, or paying down debt faster than the minimum.
Two details trip people up, and this calculator fixes both. First, the rule applies to take-home pay, not gross — so enter what actually lands in your account. Second, most of us aren't paid monthly, so the tool converts your weekly, biweekly, or semi-monthly cheque into a true monthly figure before splitting, and also shows how much of each individual paycheck belongs in each bucket — which is how you actually budget in real life.
The math
Your true monthly income depends on how often you're paid:
Then each bucket is simply your chosen percentage of that monthly income, and per-paycheck amounts are the same percentages of one cheque.
- Monthly income: your paychecks work out to
$4,333/month. - Needs (50%):
$2,167/month. - Wants (30%):
$1,300/month. - Savings (20%):
$867/month.
When to bend the rule
50/30/20 is a starting point, not a straitjacket. In high-cost cities, needs can swallow far more than half, and the honest move is to shrink wants rather than pretend rent is optional. Carrying high-interest debt? Temporarily push the savings-and-debt slice well above 20% to kill it faster. Early in a strong-earning career, banking 30–40% can pull retirement forward by years. Adjust the percentages above and the buckets recalculate instantly — the framework matters more than the exact numbers.
Frequently asked questions
What is the 50/30/20 rule?
Split after-tax income into 50% needs (housing, utilities, groceries, minimum debt), 30% wants (dining, hobbies, subscriptions), and 20% savings and extra debt payoff. Adjust the split to fit your situation.
Gross or net income?
Net — your take-home pay after taxes and deductions. Using gross overstates what you can spend, since a big chunk of gross never reaches your account.
How do I budget biweekly pay?
Multiply biweekly take-home by 26 and divide by 12 for true monthly income, then split that. This tool does it automatically and shows per-paycheck amounts too.
What counts as a need vs a want?
A need is something whose absence causes real harm — shelter, basic food, utilities, insurance, commuting, minimum debt payments. Almost everything else, including the nicer version of a need, is a want.