Paycheck buffer
One month of expenses held in checking, so this month's bills are paid with last month's income and timing stops mattering.
A paycheck buffer is a month of expenses held in checking, so the money spent in August is money earned in July. This month's paychecks refill the buffer for next month. What it changes is not the total amount saved but the phase: income and bills stop passing each other at high speed.
What it buys is mostly the disappearance of timing as a source of stress. Bill due dates no longer matter; everything can be paid the moment it arrives. The gymnastics of "which paycheck covers which bill" ends. For income that arrives irregularly — freelance, tips, commission — the buffer converts lumpy income into a smooth monthly figure.
Sized honestly, the buffer equals a full month of typical spending, which is a real savings goal. It works partially even when it is partial: two weeks of clearance already ends most timing emergencies. Money sitting in checking earns little, which is the modest cost of the calm it purchases.
Plumb is financial education, not financial, investment, tax, or legal advice.