budgeting
How much can I spend per day until payday?
Money now, minus bills still due, minus what you set aside, divided by the days until payday. The formula in plain words, with a worked euro example.
Here’s the formula, in plain words:
(money you have now − bills still due before payday − what you want to set aside) ÷ days until the money comes in
The answer is how much you can spend each day without running out before payday. If you’d rather not do the sums yourself, our free safe-to-spend calculator does it in a few seconds.
An example. You have €2,376.45 across your accounts. You still have €982.00 to pay: rent, utilities and Netflix. You’re not setting anything aside this month. Payday is 5 days away.
€2,376.45 − €982.00 = €1,394.45. €1,394.45 ÷ 5 = €278.89 a day.
That’s the number.
How do you work it out, step by step?
1. Money you have now. Everything you can use today: current account, card, cash. Leave out savings you don’t want to touch.
2. Bills that haven’t gone out yet. Rent, loan payments, utilities, subscriptions, anything that lands before payday. Take them off first. That money is already spoken for; it just hasn’t left your account yet.
3. What you set aside. If you want to move something to savings this month, take it off now. If not, write zero. I wrote about why a savings transfer isn’t spending here.
4. Days until payday. Count today too. If today is the 26th and payday is the 1st, that’s 5 days: the 26th, 27th, 28th, 29th and 30th.
5. Divide. What’s left after step 3, divided by the days from step 4.
Why isn’t “balance divided by days” enough?
Because the balance lies. It knows nothing about the bills coming up.
Same money: €2,376.45 ÷ 5 = €475.29 a day. Sounds comfortable. You start spending, and day one feels fine. But the utilities go out on the 28th, Netflix on the 29th, rent on the 30th. Together that’s €982. If you spent “what the division said”, you can’t pay the rent on the 30th.
The gap between €475.29 and €278.89 a day is exactly the rent and bills. That’s why you subtract them before you divide.
What if the number is small or negative?
It happens, and it’s nothing to feel bad about. It’s information, and you’re getting it early, not on the 29th.
A few moves that actually help:
- Shrink this month’s set-aside. €50 that stays put beats €200 you pull back after a week. You can rebuild it next month.
- See if a bill can wait. Some providers will move a due date if you ask. Once in a while, not every month, but it’s worth a call.
- Pick one place to cut. Not “spend less on everything”. Groceries, eating out, online orders: choose one and give it a daily cap.
- Check your day count. Maybe payday is earlier than you thought, or some money is still coming in. One wrong date changes everything.
If the number comes out below zero, your money right now doesn’t cover even the bills that are left. Then the first question isn’t “how much do I spend a day” but “what can I move or postpone”. It’s fine to stop there and make that decision before spending anything.
How often should you redo it?
Ideally every morning. The number changes with every purchase and every day that passes. Spend less today and tomorrow’s number is higher. Spend more and it’s lower.
You can do this in a notebook or a spreadsheet. Spentalot shows it ready-made every morning, using the same rules as above. But the formula works just as well without an app.
Try it with your own numbers
Put your money now, the bills left, your set-aside and your payday date into the calculator. No account needed, and nothing is saved. To see the number inside a full budget, take a look at the Spentalot home page.
This article is general education, not personal financial advice. What’s safe to spend depends on your income, bills and plans. The example uses the figures from Spentalot’s demo account (September 2026).
