A guide
How to budget when your income changes every week
Most budgeting advice starts with a number you don't have: your monthly income. If you work for tips, drive, freelance or pick up shifts, that number moves every month and sometimes every week, so the usual plan falls apart by the 10th.
There's a steadier question to ask. Not how much you make a month, but how low your balance gets before the next money comes in. That is the number that decides whether rent clears.
1.Start from what's in the account today
Not what you expect to make this month. The balance you can see right now in your banking app. Everything else gets added to it or taken away from it, one day at a time.
If money is sitting in savings that you would genuinely move to cover rent, note it separately. If you wouldn't, leave it out.
2.Put every bill on the day it comes out
Monthly totals hide the problem. Rent on the 1st and a paycheck on the 3rd look fine in a monthly budget, but the rent leaves two days before the pay arrives.
Write each bill next to its date, including the small ones that renew on their own: the phone, the streaming service, the app you forgot you pay for. A bill due on a weekend can still come out that day, so plan on the date itself.
3.Plan on a usual week, then test a slow one
Look back at your last few paychecks or payouts. Plan with a usual one, then run the same plan again with one of the lower ones.
If the plan still holds on the slow run, a good week is extra and can go to savings or debt. If it only holds on a usual week, the tight weeks are already marked.
4.Find your lowest day
Walk your balance forward a day at a time. Add each deposit on the day it lands. Take away each bill on the day it comes out. Somewhere before your next deposit there is a lowest day.
That lowest day is your real budget. Anything you want to spend this week has to fit above it, not above today's balance.
5.Keep a comfort line you don't go below
Pick an amount you never want to drop under, even on the lowest day. For some people it is $100. For others it is a full rent payment.
It covers the bill you forgot, the payout that shows up a day late and the fee you didn't see coming. If your lowest day is above your comfort line, you have room. If it isn't, you know which week to be careful with.
6.Check before the big spends, not after
Before the concert tickets, the car repair or the flight home, run the cost against your lowest day. If you still stay above your comfort line, it fits.
If it doesn't, the answer usually isn't no. It's later: after the next deposit, or after the bill that falls in the same week.
Doing this without the spreadsheet
Everything above works on paper or in a spreadsheet. Horizon Runway started as one spreadsheet, kept current for nearly six years, before it became an app.
The app does the walking forward for you: pay on its schedule, bills on their dates and your lowest day called out ahead of time.
A sample forecast
Lowest day:
$1,103
Fri, Nov 27
Try a change
Your lowest day, $1,103, lands $897 below your comfort line.
- Dentist bill on Nov 12: $1,100 the insurance didn't cover.
A sample forecast
Lowest day:
$1,103
Fri, Nov 27
Try a change
Your lowest day, $1,103, lands $897 below your comfort line.
- Dentist bill on Nov 12: $1,100 the insurance didn't cover.
Free. No account, no card, no bank login required.