How to track daily expenses on a salary: categories and budgets

Thu, 01 Oct 2026 00:00:00 GMT

The short version

Write down every expense on the day you pay it, for one full month, before you set a single budget.
Use 8 to 12 categories. Fewer hides the problem; more makes logging a chore you will drop.
Put budgets only on the 3 or 4 variable categories that move. Rent and EMIs need reminders, not limits.
Start your budget month on payday, review it for 15 minutes at the end, and change one number at a time.

Tracking daily expenses means recording every rupee you spend on the day you spend it, in a category, so you can see where your salary actually goes. For a working professional it is the cheapest form of financial discipline available: a few seconds per payment, and "where did the money go?" stops being a mystery at the end of the month. Below is why it works, which categories to use, and how to turn one month of entries into budgets you can keep.

Why should working professionals track daily expenses?

Your salary arrives once a month, but you spend it a few hundred times, mostly in small digital payments you never see leave. Recording each one gives back the feedback that handing over cash used to give. Research on goal monitoring shows that people who record their progress are more likely to reach a goal than people who only intend to.

The payments have moved to where you cannot feel them. In August 2026 UPI processed 24.51 billion transactions in India, about 791 million a day (Business Standard, citing NPCI data). For many professionals a large part of the month now happens in taps of ₹40 to ₹400: chai, an auto, a snack order, a mobile top-up. None of them feels like spending.

How you pay changes how much you spend. In a study at MIT, people bidding on sports tickets were willing to pay up to twice as much when told to pay by credit card rather than cash (Prelec and Simester, 2001). UPI is not a credit card, but it removes the same thing: the moment of watching money leave your hand.

Tracking puts that moment back. A 2016 meta-analysis of 138 studies with nearly 20,000 participants found that monitoring progress toward a goal improves the chance of reaching it, and that the effect is larger when the information is physically recorded rather than kept in your head (Harkin et al., Psychological Bulletin). Most of those studies were about health goals such as exercise and diet. The mechanism carries over to money: you cannot correct what you cannot see.

What should you record for each expense?

Record four things: the amount, the category, the date, and the account it came from (bank, credit card, UPI wallet or cash). Add a short note only when you might not recognise the entry a week later. Anything more slows you down, and over a month, speed decides whether you keep logging at all.

The account matters more than most people expect. A ₹2,000 dinner on a credit card is ₹2,000 spent this month, even though your bank balance has not moved yet. Recording the account keeps "what I spent" and "what I have" from drifting apart.

Log at the moment of payment, before the phone goes back in your pocket. If that is not possible, log the same evening. A payment you cannot remember after three days becomes a guess, and a month of guesses tells you very little.

How many expense categories should you have?

Most salaried people need 8 to 12 expense categories. With fewer than 6, one large bucket such as "Shopping" hides where money actually goes. With more than 15, every entry becomes a small decision, logging slows down, and people stop. Start with a standard set and add a category only when it earns one.

The economist Richard Thaler calls this mental accounting: people naturally sort money into accounts such as rent money, food money and fun money, and treat each account differently (Thaler, 1999). Categories make those accounts explicit, so you can see them instead of only feeling them.

A starting set for a working professional:

Category	What goes in it	Common mistake
Rent and housing	Rent, maintenance, society charges	Leaving out maintenance
Groceries	Supermarket, vegetables, quick-commerce orders for home	Mixing in snacks bought at work
Eating out and delivery	Restaurants, cafés, food delivery, office canteen	Splitting it into five sub-categories in week one
Transport	Fuel, metro, cabs, autos, parking	Skipping small auto and metro payments
Bills and utilities	Electricity, internet, mobile, gas, DTH	Recording only the large bills
EMIs and loans	Loan EMIs	Logging the credit card bill here as well as the purchases made on that card, which counts the same spending twice
Shopping	Clothes, gadgets, household items	Using it as a catch-all
Health	Medicines, consultations, tests	Forgetting annual premiums, which then distort one month
Subscriptions	OTT, music, cloud storage, apps	Not noticing price increases
Family and gifts	Gifts, festivals, support sent home	Leaving festival spending unrecorded
Other	Anything that fits nowhere	Letting it grow unchecked

Split a category when it is big enough that you would act differently on the parts. If eating out is ₹9,000 a month and half of it is late-night delivery, a separate "Delivery" category will change what you do. If pet supplies cost ₹400 a month, they can live in "Other". A useful check: if "Other" grows past about 5% of your monthly spending, something inside it deserves its own name.

How do you set a budget you will actually keep?

Set budgets from a month of real numbers, not from what you hope to spend. Take each variable category's actual spending from the last month, reduce it by about 10%, and use that as the limit. A budget you miss every month teaches you to ignore it; a slightly tighter version of reality is one you can hit.

Track one full month without changing anything. You are measuring, not dieting.
Split costs into fixed and variable. Fixed: rent, EMIs, insurance, subscriptions, most bills. Variable: food, transport, shopping, entertainment.
Budget the variable categories only, starting with the three or four largest.
Match the period to the habit. Use weekly limits for things you buy several times a week, such as eating out and cabs. Use monthly limits for groceries and shopping. Use yearly limits for things paid once or twice a year, such as insurance and festivals.
Treat 80% as a warning. Decide in advance what you will do when a category reaches it, so the decision is not made at the counter.

Weekly limits deserve a closer look. A monthly eating-out budget is often gone by the 18th, and you find out on the 25th. A weekly one resets every Monday, so a bad week costs you one week, not the rest of the month.

Here is a worked example with illustrative numbers. Say your take-home pay is ₹85,000 a month (roughly $1,000) and it arrives on the 25th. After one month of tracking:

Category	Type	Last month	Budget
Rent and housing	Fixed	₹24,000	None
EMIs and loans	Fixed	₹12,500	None
Bills and utilities	Fixed	₹3,300	None
Subscriptions	Fixed	₹1,400	None
Groceries	Variable	₹8,200	₹7,500 a month
Eating out and delivery	Variable	₹9,600	₹2,000 a week
Transport	Variable	₹4,800	₹1,000 a week
Shopping	Variable	₹6,000	₹5,500 a month

The four variable categories cost ₹28,600 last month. Kept within their new limits, they come to about ₹26,000, because a weekly limit covers 52 weeks a year, or about 4.3 weeks a month. That is roughly ₹2,600 more left at the end of every month, or about ₹31,000 over a year, from changing four numbers.

When should your budget month start?

Start it on payday. If your salary lands on the 25th, a calendar month splits one real month across two budget periods: the first days after payday look comfortable, the last days look tight, and neither picture is accurate. Set your month to run from payday to the day before the next one.

This sounds minor until you try to budget across the 1st. Rent goes out on the 5th, salary came in on the 25th, and a calendar-month report puts them in different months. Many budgeting apps only support calendar months, so check this before you choose one.

How long does it take for daily tracking to become a habit?

Longer than three weeks. In a study that followed 96 people building a new daily habit, the median time until the behaviour felt automatic was 66 days, with individual times ranging from 18 to 254 days (Lally et al., 2010). Plan for two to three months of deliberate logging before it runs on its own.

The same study found that missing a single day did not materially affect habit formation. One forgotten evening is not a reason to stop. Log what you remember and carry on.

Two things make the early weeks easier. First, tie the entry to the payment itself: the payment is the trigger and the entry is the response. Second, remove entries you would otherwise have to remember by setting up rent, EMIs and subscriptions as recurring entries, so only the unpredictable spending is left for you to type.

What should you check at the end of each month?

Spend 15 minutes, once, on four questions: which categories went over budget, which stayed well under, what surprised you, and which single number you will change next month. Change one budget at a time, so you can tell whether the change worked.

Look at the over-budget categories first, but ask why before cutting the limit. A wedding gift is a one-off; three weekends of delivery is a pattern. Only patterns need a new budget.

If a category comes in under budget, decide in advance what happens to the difference. Some people let it roll into next month's limit; others leave it alone. Either works, as long as the rule is set before the money is spent.

Which tool should you use to track daily expenses?

Use whichever one you will open every day. For daily tracking that means entry in a few seconds, categories you can rename and add to, budgets with weekly as well as monthly limits, a month that can start on payday, and no setup that asks for more of your data than you are comfortable sharing.

Option	Works well when	Falls short when
Notebook	You pay mostly in cash and like writing things down	You want totals or category reports
Spreadsheet	You enjoy building formulas and review weekly	You need to log on the go and entries pile up
Bank or UPI app history	You want a record that already exists	Categories are guesses, cash is missing, and nothing warns you before a limit
Bank-linked budgeting app	You want transactions imported automatically	You prefer not to give a third party access to your account data, and imports still need correcting
Manual tracking app	You want fast entry, budgets and privacy	You will not open it every day

Nett is an income and expense tracker for iOS and Android that keeps all data in a local database on your phone and never links to a bank account. It follows the method in this guide: a calculator keypad for quick entry, default and custom categories, budgets per category with weekly, monthly or yearly limits that turn amber at 80% and red at 100%, a Monthly Start Date for payday-based months, and recurring entries for fixed costs, plus a daily reminder at 8 PM. There is no account to create and no ads. Why it never connects to your bank is explained in Why Nett never links to your bank account.

To be clear about cost: the free version covers 30 manual entries a month (recurring entries such as rent do not count) and budgets on 3 categories per space, which suits light tracking. People who log every expense daily usually outgrow it. Premium removes the limits for ₹999 a year or ₹1,499 once (US$19.99 or US$49.99); prices may vary by region and store.

The method works in a notebook too. What matters is that every payment gets written down on the day it happens.

Sources

Harkin, B., Webb, T. L., Chang, B. P. I., Prestwich, A., Conner, M., Kellar, I., Benn, Y., and Sheeran, P. (2016). Does monitoring goal progress promote goal attainment? A meta-analysis of the experimental evidence. Psychological Bulletin, 142(2), 198-229. Open-access copy
Prelec, D., and Simester, D. (2001). Always leave home without it: A further investigation of the credit-card effect on willingness to pay. Marketing Letters, 12(1), 5-12. Springer
Thaler, R. H. (1999). Mental accounting matters. Journal of Behavioral Decision Making, 12(3), 183-206. Wiley
Lally, P., van Jaarsveld, C. H. M., Potts, H. W. W., and Wardle, J. (2010). How are habits formed: Modelling habit formation in the real world. European Journal of Social Psychology, 40(6), 998-1009. DOI
Business Standard (1 September 2026). UPI sets new record at 24.51 bn transactions in Aug, value at ₹29.82 trn. Article

Why Nett never links to your bank account

Sun, 20 Sep 2026 00:00:00 GMT

Most budgeting apps open with the same screen: connect your bank. It feels convenient, and it is, for the app. You hand over read access to every transaction you have ever made, and from then on your money data lives on someone else's server.

Nett is built the other way round.

What "no bank link" means in practice

You enter transactions yourself. A coffee is ₹180 (about $2) and three taps: amount, category, done. The in-app keypad and category grid are tuned for this, so entry takes seconds, not a form.
Recurring entries do the boring part. Rent, salary, subscriptions and EMIs are logged once and repeat on their schedule.
Receipts ride along. Snap the bill; it stays attached to the entry.

Where the data lives

Everything (transactions, budgets, goals, accounts) sits in a local database on your phone. There is no Nett account, no login and no server holding a copy. If you want a backup, Nett writes a file to your iCloud Drive or Google Drive and never sees it again.

Why this is a feature, not a limitation

A bank feed knows what you spent. It does not know why, which Space it belongs to (personal, business, the Goa trip), or whether the ₹40,000 ($480) that landed was an advance you still have to deliver on. Typing the entry is where that context gets attached, and it is the reason your monthly report actually explains the month.

Examples use Nett, a free tracker that does not link to your bank; the method works with any notebook or spreadsheet too.

Nett Blog