How to budget by paycheck
A monthly budget can balance and still bounce a bill. Rent due on the 1st doesn't care that a paycheck arrives on the 2nd. Budgeting by paycheck fixes that: each bill is matched to the paycheck that arrives before it's due, and whatever is left from that paycheck is what you have for groceries, gas and everything else until the next one.
The chart above adds the part a monthly total hides: the day-by-day balance. The lowest point is the number that matters. If it dips below zero, a bill will bounce or overdraft, even in a month where the totals add up.
If a paycheck comes up short
Three fixes, in the order most people try them: set part of the paycheck before it aside for the bills it can't cover; ask the company to move the due date to just after a payday (most will, if you ask); or build a buffer of one month's bills in the account, so timing stops mattering.
Questions people ask
Which paycheck should pay which bill?
Pay each bill from the last paycheck that arrives before it's due. A bill due on the 10th comes out of the paycheck on the 2nd, not the one on the 16th. Bills due before your next payday come out of what's in the account now.
What if one paycheck can't cover its bills?
Set some of the earlier paycheck aside for them, or ask the company to move the due date. Most lenders and utilities will move a due date if you ask.
What do I enter for pay?
What actually lands in your account each payday, after taxes and deductions, not your salary.
Why 30 days?
It covers every monthly bill once and at least two paychecks for most pay schedules, which is where a timing problem shows up.