The expected column is easy to name: wages, the date they land, the amount. The other column is harder to see, because it arrives in disguise — a refund you had written off, a friend who quietly settles the bill, a repair that costs half what the garage first said.
None of it registers as income. All of it changes what a month can hold.
Keep a rough tally this week of whatever came in sideways. Most people find that second column busier than they had assumed.