Gross pay and net pay: why the number on your offer letter never arrives

You get the offer. Five thousand a month. You read it twice, you tell someone, you start doing sums in your head on the way home.

Then payday arrives and your account says three thousand eight hundred.

Nothing went wrong. Nobody made a mistake. You were told one number and paid another, and both are correct, because they are answers to two different questions.

The two numbers

Gross pay is what you earned. It is the number in the offer letter, the number in the job advert, the number you say out loud when someone asks what you make.

Net pay is what arrives. It is what is left after everything that comes out before you ever see it, and it is the only one of the two you can actually spend.

The gap between them is not small, and it is not optional. Nobody asks your permission, because it is taken out before the money is yours.

Where the difference goes

The exact list depends entirely on where you live and work, so treat the numbers below as an illustration of the shape rather than your own payslip. Your country's rates will be different. The categories usually are not.

On that five thousand:

Roughly a quarter of it, gone before it lands. That proportion is normal. In some countries it is more.

Two of those deductions are worth thinking about differently from the others. Income tax is gone. Pension or social security is not gone: it is your money, moved somewhere you cannot reach yet. It belongs in your net worth even though it is missing from your account, which is why working out your net worth usually surprises people upwards.

Why this matters more than it sounds

Knowing the definition is not the point. The point is that almost every money decision you make is quietly built on one of these two numbers, and it is usually the wrong one.

Rent, and the advice that ruins people

You will hear that rent should be about a third of your income. Nobody ever says which income.

A third of five thousand is 1,667. A third of three thousand eight hundred is 1,267. That is a difference of 400 a month, forever, on a decision you cannot easily reverse for a year.

Take the higher number and you have not overspent by a little. You have committed 44 percent of the money you actually receive to rent, and then you will spend the year wondering why nothing is left, feeling broke on a good income and blaming yourself for a shortfall that was arithmetic.

Every ratio you read, every percentage rule, every "spend no more than" applies to net pay. If a rule does not say which one, it means net.

The raise that goes missing

You negotiate hard and get a 500 raise. You plan around 500. Then the payslip comes and you are 350 better off.

This catches people every time, and it feels like being cheated. It is not. The raise is income too, so the same deductions come out of it, and often at a higher rate than your earlier money, because most tax systems charge more on your top slice than on your first.

So the rule for any raise, bonus or promotion: assume you keep roughly two thirds until you have seen the payslip. Then decide what to do with it, ideally before it arrives, which is the whole argument for banking half of every raise.

Two job offers that are not what they look like

One job offers 5,000. Another offers 4,700.

The second one includes health insurance the first does not, and pays 10 percent into a pension where the first pays 5. Once you work through the deductions and what you would have to buy yourself, the smaller offer can easily put more money in your account and more in your name.

Comparing job offers on gross pay is comparing the labels, not the contents. Ask for an estimate of the net figure, and ask what the employer contributes on top. Both are fair questions and any decent employer expects them.

If you work for yourself

Then everything you are paid is gross, and there is no payroll department quietly handling the rest. The tax has not gone anywhere. It is sitting in your account looking exactly like your money, right up until it is due.

The habit that saves freelancers: the moment a client pays, move the tax portion out of reach. Treat it as never having been yours, because it was not. If you do not know your rate yet, set aside more than you think and correct later. A sinking fund for a bill you know is coming is exactly the right tool, and tax is the most predictable bill you will ever have.

Read your payslip once, properly

Most people have never actually read theirs. Do it once, slowly, and check three things.

Add the deductions up and confirm they equal the gap between gross and net. They should. If they do not, ask.

Look for anything you do not recognise. Union dues you never joined, a loan repayment already cleared, an insurance you were opted into by default. These sit unnoticed for years because nobody looks, and they are the payslip version of subscription creep.

Check the pension line, and whether your employer adds to it. If they match your contribution and you are contributing less than the match, you are turning down money that is yours for the taking.

The habit that matters

Learn your net pay by heart, and plan with that number only.

Not your gross. Not roughly. The actual figure that lands, the one you could say from memory right now if someone asked. If you cannot, that is the thing to go and find out today, because every budget, every rent decision and every rule of thumb you apply is wrong by about a quarter until you do.

The gross number is for your CV and your pride. The net number is the one your life is actually built on.

In Wealthpadi you record income as it arrives, so what the app is working from is the money that genuinely landed, not the number on the offer letter. Your safe to spend is built from that, which is why it tends to be smaller than people expect and also why it is the figure you can trust.

This is one term from the plain English money glossary, where the rest of the words you actually meet are gathered in one place.

Put this into practice

Wealthpadi turns habits like these into something automatic. Track your money, set goals, and watch your net worth grow. Free to start.