Gross pay versus net pay
Gross pay is your salary before anything is removed: the number in your contract and the number in the job advert. Net pay, sometimes called take-home, is what arrives in your account.
The gap between them is made up of income tax, social security or national insurance contributions, pension contributions, and any voluntary deductions. Depending on the country and your income level, that gap commonly ranges from around fifteen percent to well over forty.
This is why comparing gross salaries across countries is close to meaningless. A higher gross in a high-deduction country can leave you with less spendable income than a lower gross elsewhere — before you have even considered what housing costs.
How income tax usually works
Most countries use progressive taxation, and it is widely misunderstood. Income is divided into bands, and each band is taxed at its own rate — the higher rate applies only to the portion of income above that threshold, not to everything you earn.
This matters because of a persistent myth that a raise can leave you worse off by pushing you into a higher bracket. Under a progressive system it cannot. Only the additional income above the threshold is taxed at the higher rate; everything below it is unaffected.
Most systems also have a tax-free allowance at the bottom, and many have deductions or credits for things like dependants, professional expenses or retirement contributions. Those are frequently unclaimed, which is a genuine and common source of overpayment.
Pension and retirement deductions
Retirement contributions appear as a deduction but are not a cost in the same sense — the money is still yours, just moved into an account you cannot access for decades.
In many countries these contributions receive tax relief, which means each unit you contribute costs you less than a unit of take-home pay. Where an employer matches contributions, declining to participate is straightforwardly refusing money.
If your payslip shows a pension deduction, check whether the employer is contributing too, and whether increasing your own contribution increases theirs. That is frequently the single highest-return decision available on a payslip.
Reading the rest of the payslip
Beyond the main deductions, most payslips carry a set of standard fields worth being able to identify.
- Pay period — the dates this payment covers.
- Gross pay for the period, and often year to date.
- Tax code or equivalent — determines how much tax is withheld; an incorrect one is a common cause of overpayment.
- Income tax withheld this period and cumulatively.
- Social security or national insurance contributions.
- Pension contributions, yours and sometimes the employer's.
- Other deductions — health insurance, union dues, salary sacrifice arrangements, loan repayments.
- Net pay, and the account it was paid into.
Check it, at least occasionally
Payroll errors are more common than most people expect and they can persist for years because nobody looks.
At least once a year, and always after any change — a raise, a promotion, a new job, a change in family circumstances — read the payslip properly. Confirm the gross matches your contract, the tax code or equivalent is right, the pension percentage is what you agreed, and that no deduction has appeared that you did not authorise.
If something looks wrong, ask payroll in writing and keep the reply. Overpaid tax is usually recoverable, but the process is far easier within the same tax year than several years later.
Why identical salaries produce different lives
Two people earning the same gross figure in different countries can end up with dramatically different disposable income, and the deductions are only the first part of the explanation.
After tax and contributions, the next factor is cost of living — housing above all, then transport, food and childcare. After that comes what the state provides. A country that deducts more may include healthcare, university tuition and substantial parental leave in that deduction; a country that deducts less may leave you buying all three.
When comparing an offer abroad, work out the net figure first, then adjust it for local costs, then add the value of what you no longer have to pay for privately. The headline salary is the least informative number in the comparison.
Social security and national insurance
Separate from income tax, most countries deduct a social contribution that funds state pensions, healthcare, unemployment benefit and sometimes parental leave.
In many places both you and your employer contribute, and the employer's share is invisible on your payslip even though it is part of the real cost of employing you. Some countries cap these contributions above a certain income; others do not.
The key point when comparing jobs internationally: a country with high social contributions often provides services that you would otherwise buy privately. A lower deduction is not automatically better if it comes with large private healthcare or childcare costs attached.