Daily Spending Allowance Calculator: Your Number Per Day (Free)

This calculator runs entirely in your browser: nothing you type is uploaded, stored or sent anywhere, and it keeps working with the connection off. It answers one question that a monthly budget never quite does: how much can I spend today? You give it four figures, income, fixed bills, a savings target and the days left in the month, and it returns a daily allowance, a weekly version of the same number and a line that shows what tomorrow looks like if you spend a given amount today.

How to use it

1. Take-home income first: the amount that reaches your account this month, after tax and deductions. Two income sources, add them together. If your income moves around, use a cautious figure such as the lowest month in the last six, and treat anything above it as a bonus that goes to savings the moment it arrives.
2. Fixed bills next, meaning everything that leaves on a set date for a roughly set amount. Rent or mortgage, utilities, phone and internet, insurance, subscriptions, loan and card minimums, childcare. This one field decides whether the daily number is honest. Most people undercount it by the two or three subscriptions they stopped noticing years ago, so open last month's statement instead of working from memory.
3. The savings target is what you want moved out before it can be spent. Zero is allowed. It sits above the line rather than being whatever survives to the end of the month because whatever survives to the end of the month is usually nothing.
4. Days left fills itself in from today's date, counting today. Budgeting payday to payday instead? Change it to the days until the next one. The calculator does not care what the period is called. It only divides.
5. The big figure is today's allowance, with the weekly version beneath it. Then type an amount into the last field to get the tomorrow line: spend this much today, and here is what tomorrow becomes. That is the most useful line on the page, because it prices a decision before you make it.

What the daily allowance means here

The arithmetic is short. Spendable money for the month is income minus fixed bills minus the savings target. The daily allowance is that pool divided by the days left, including today. The weekly allowance is the daily figure times seven. The tomorrow line takes the pool, subtracts what you say you will spend today, and divides by one day fewer.

What makes this more than a division is what sits inside the pool. The daily number has to cover everything variable: groceries, transport that is not a fixed pass, lunches, coffee, the pharmacy, small things for the house, a gift. That is deliberate. Those categories are where most months are lost, and they are lost precisely because nobody assigns them a number small enough to feel. A monthly grocery budget is a figure you check on the 28th, if at all. A daily allowance of 34 is a figure you notice in the queue at the supermarket.

The number also moves. Spend 20 on a day with a 34 allowance and the 14 you did not spend stays in the pool, so tomorrow's number rises slightly. Spend 60 and tomorrow's number falls. This is gentler than the way a monthly budget fails, which is silently, on the 22nd, with a week to go. The correction here is a few units a day in either direction, and it starts the next morning.

The days field counts from today because the money you have not spent today is still yours to spend today. Run it on the 15th of a 30-day month and the divisor is 16, not 15. That off-by-one is the single thing about this page people email about, and it is deliberate.

There is one feature the tool refuses to have, and we get asked for it every few weeks: a rollover pot that carries yesterday's underspend forward as a visible bonus. The arithmetic already does it, quietly, by putting the unspent money back in the pool. Showing it as a separate balance turns an underspend into something you have earned the right to blow, which is the opposite of what a pacing number is for.

When a daily number is the wrong unit

A daily allowance is a pacing tool, and pacing only helps when there is something to pace.

The clearest failure is a pool that comes out at zero or below. If fixed bills plus the savings target exceed income, the calculator shows zero and the size of the shortfall, and no amount of dividing by days changes that. Set the savings target to zero for this month, then go back through the bills figure and decide which items are genuinely fixed. Still negative? Then this is a month that needs more than a calculator, and public guidance such as the CFPB's budget worksheet, or a conversation with a qualified adviser, is the right next step. The tool will not pretend otherwise.

A very small pool has the same problem in a politer form. A daily allowance of 6 is arithmetically correct and practically useless, because one grocery shop destroys it. Work in weeks when the daily number is that low. The weekly figure on the page is the same money over seven days, and a shop plus a few small things fits inside it much more naturally. The guide on setting a daily budget covers choosing the period.

Lumpy spending is the subtler case. A big shop every ten days, a monthly train ticket bought on the 3rd, a birthday in the third week: all of it makes the daily number swing. One large day pushes tomorrow's allowance down sharply, then a run of small days pushes it back up. The number is right and it feels wrong. Either move the predictable lumps into fixed bills, or read the weekly figure on the days after a big shop.

Stale bills are the failure nobody notices. A subscription that renewed quietly, an insurance premium that crept up, a card minimum that grew: each one makes the pool look bigger than it is, and the daily number inherits the error without complaint. Recheck the total at the start of each month. Tracking subscriptions and recurring bills is about keeping that list true.

And sometimes a day is simply the wrong unit. Someone who eats every meal at home and shops once a week does not spend daily, so a daily figure nags them for nothing. Someone paid weekly will do better with a seven-day divisor. The tool is indifferent. Set the days field to whatever period matches how money actually leaves your account.

Four months, four pools

Take a straightforward calendar month. Take-home income $3,400. Fixed bills $1,900, made up of $1,250 rent, $210 utilities and phone, $140 insurance, $180 loan minimum and $120 of subscriptions. Savings target $300. That leaves a pool of $1,200, and on the 1st of a 30-day month the daily allowance is $40.00, the weekly figure $280. Spend $65 today and the pool drops to $1,135 across 29 days, so tomorrow becomes $39.14. Spend $20 instead and tomorrow is $40.69.

Same income and bills, but it is now the 18th of a 31-day month and only $380 of the pool survives, because the first half ran hot. Fourteen days left, so the daily allowance is $27.14. Put $50 in the tomorrow field for a grocery run and tomorrow becomes $25.38. The tool does not scold you. It shows the pace, and $25 a day for two weeks is a plan rather than a disaster.

Paid every two weeks? Pay is $1,600 a cycle, bills leaving during this cycle are $900, savings target $150. Set days left to 14 and the pool is $550, the daily allowance $39.29, weekly $275. Run it again on the next payday with whichever bills fall in that cycle, because they will not be the same ones.

The last case is the one nobody wants. Income $2,100, fixed bills $1,850, savings target $400. The calculator reports minus $150 spendable and a daily allowance of zero. Drop savings to zero and the pool becomes $250, roughly $8 a day across a month. Read that month in weeks, at $58, and spend it looking at the bills list rather than the daily number.

Seeing the number every day, not once

The calculator gives you today's number once. The value is in seeing it every day, adjusted for what you actually spent, and that requires logging fast enough that you keep doing it.

Cash Book's Budgets hold a monthly or weekly allowance and show the amount left under the big number on Home. Set the pool from this calculator as the monthly allowance, or the weekly figure as a weekly one if that is how you think, and each purchase you log brings the remaining amount down in real time. The app does not display a per-day figure, so on days when you want it, divide what is left by the days remaining; the arithmetic is the same as on this page.

Logging is what makes the remaining amount true. The voice logger takes "coffee three fifty and groceries forty-two" and turns it into two transactions with tags and today's date. The keypad is three taps for an entry when you would rather not speak. Apple Pay taps can log themselves through a one-time Shortcuts automation. When logging costs seconds, the allowance on Home matches your bank account, and the daily number stops being an estimate.

For the surrounding routine, how to make a monthly budget that sticks covers deciding the pool at the start of each month, and how to track cash spending is for the part of daily spending that never shows up on a statement.

The other tools

The 50/30/20 budget calculator decides how much of income is spendable in the first place; this tool paces that amount. The savings goal calculator tells you what the savings target you typed here buys, and when. The subscription cost calculator totals the recurring lines that belong in the fixed bills field. The small purchases calculator shows what a daily habit does to the daily allowance over a year, and the hours of work calculator reprices a purchase in the time it took to earn.

Where to go next

Run the calculator on the first of the month with a bills figure you have checked against a statement. Set the pool as an allowance in Budgets, log for the month, and on the last day compare the amount left with zero. If it is close, the pool was right. If it went negative early, the bills figure was probably light, and the subscription guide is the next read. If the daily number felt too small to be useful, the guide on setting a daily budget explains how to pick a period that fits how you shop, and the student guide covers the tightest version of this problem, where the pool is small and the term is long.

A daily allowance does not make a month cheaper. It makes the cost of today visible before today is over, which is the moment when a number can still change a decision.

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