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How much can I spend today? Turn a monthly budget into a daily allowance
Daily allowance = the money you can spend freely this month ÷ the number of days. “Money you can spend freely” is take-home pay minus fixed bills and what you plan to save. After that, you only need two rules: what happens to money you don’t spend, and what happens when you overspend.
The formula
Daily allowance = money you can spend freely this month ÷ days
To work out the money you can spend freely:
- Start with take-home pay: what actually lands in your account after tax.
- Subtract fixed bills: rent, utilities, phone, transit pass, subscriptions, insurance.
- Subtract what you plan to save. Save first, then spend; otherwise savings become whatever happens to be left.
- What remains is your spending money.
| Item | Example |
|---|---|
| Take-home pay | $3,600 |
| Fixed bills | − $1,900 |
| Save first | − $500 |
| Money to spend freely | $1,200 |
| ÷ 30 days | $40 a day |
The amounts are only there to show the arithmetic. Use your own.
Paid every two weeks?
Convert to a monthly figure first: paycheck × 26 ÷ 12. A $1,600 biweekly paycheck is about $3,467 a month. Two months a year have a third paycheck; you can treat those as extra savings rather than part of the daily number.
Why daily, not monthly
The problem with a monthly budget is slow feedback: overspend in the first two weeks and you find out at the end of the month. A daily number puts a clear limit on today, so if you spend a bit more today, you know today, not twenty days later.
Daily doesn’t mean spending the same every day. Spending more on weekends and less on weekdays is fine. What matters are the next two rules.
Money you didn’t spend
Two common approaches:
- Carry it over. Spent half of today’s amount? The rest is added to the following days. Flexible, and good if your weekends cost more.
- Start fresh every day. The daily amount stays fixed and anything unspent counts as saved. Simple, and your savings grow visibly.
If you carry money over, cap how much can build up. Otherwise a few quiet days turn into one very expensive one.
When you overspend
Also two approaches:
- Take it out of the next few days. Spend less tomorrow or later to make up for today, so the month stays on track.
- Log it as a one-off. For a genuinely unplanned cost, like a doctor’s visit.
Either way, overspending shouldn’t quietly disappear. It has to come out of somewhere.
Annual fees, gifts and trips
These don’t happen every day, and putting them into the daily number makes one day explode. Set them aside instead:
- Add up the year’s big irregular costs (annual fees, insurance, holiday gifts), divide by 12, and treat that as a fixed bill each month.
- Give trips their own budget, with their own daily amount while you’re away.
How My Money calculates it
In short
- Daily allowance = (take-home pay − fixed bills − savings) ÷ days.
- Decide two rules: does unspent money carry over, and where does overspending come out of.
- Keep annual costs and trips out of the daily number.