Why you get taxed, and what every word on your payslip means

No jargon. Where each pound, dollar and dollar of your pay goes, in what order, and why the last one you earn is taxed harder than the first.

A coin sliced into segments beside a payslip and a piggy bank

Money basics6 min readAnyone who looks at their payslip, sees the gap, and has never had it explained.

The short answer

Your pay is not taxed all at once. It is sliced, and each slice has its own rate. The first slice is often free.
Two different things come off: a tax on income, and a separate contribution for state pensions and health. They have different rules and different names in each country.
This is why a pay rise feels smaller than it sounds, and why putting money into a pension gives some of it straight back.

First slice

Often untaxed

A personal allowance, standard deduction or tax free threshold

Then

Slice by slice

Only the money above each line pays the higher rate

Two deductions

Tax plus contributions

National Insurance, FICA, or the Medicare levy

Do it in this order

1Start with gross pay, the big number before anything comes off. Almost nobody keeps this.
2Take off the free slice. The United Kingdom calls it the personal allowance, the United States a standard deduction, Australia a tax free threshold.
3Tax what is left in slices. Each slice has a rate, and only the money inside that slice pays that rate.
4Take off the separate contribution for pensions and health. This is not income tax and has its own thresholds.
5What is left is take home pay. Everything a tax plan does is change steps two, three and four, legally.

Only if you want the detail

The slice idea, once and properly

The most common worry we hear is that a pay rise pushes all your pay into a higher rate. It does not. Only the money above the line is taxed at the higher rate.

The words, in plain language

This is the whole vocabulary. There is not much more to it.

Why the state takes it at all

Two of the three deductions on your payslip are not general taxes. They are contributions with your name on them: your state pension record, and in the United Kingdom and Australia, health cover.

Why two people on the same pay keep different amounts

Nothing here is a trick. It is the ordinary rules, used or not used.

If you are twelve, streaming, or selling on the side

There is no age at which tax starts. What matters is how much you make, not how old you are.

What people get told, and what is true

A pay rise can leave me worse off.

Almost never from tax rates alone, because only the money above the line pays the higher rate. It can happen through a benefit or allowance that tapers, which is worth checking separately.

Tax is one flat cut off my pay.

It is slices, plus a separate contribution with its own thresholds.

Cash does not count.

Income is income however it arrives, including tips, gifts to a channel and crypto.

Now do it on your numbers

Reading is the easy half. The saving comes from applying this to your income, your country and this tax year, with the deadline written down.

See it on your own pay Grants and backing What changed lately

Where this comes from

General guidance, not personal advice. Anything involving a company, a trust or another country should be checked by a qualified accountant or tax adviser before you act.