Start with the number on your payslip. If you earn a monthly salary, we annualise it (monthly × 12) and divide by the standard full-time working year of 2,080 hours — that is 40 hours a week across 52 weeks. If you are paid hourly or daily, we use that rate directly, treating a working day as 8 hours. This gives your gross hourly rate, the figure most people quote when they talk about what they earn.
Gross is fiction, though. Income tax, social insurance and mandatory contributions are taken before the money ever reaches you, so we apply your tax percentage and keep only what actually lands in your account. If you also add a weekly commute, those unpaid travelling hours are added to the hours you surrender each week, and the fares, fuel or parking you pay to reach the office are subtracted from your take-home pay. A 45-minute each-way commute is 7.5 unpaid hours a week — nearly a full extra working day that no employer pays for, but that you can never spend elsewhere.
What remains is your real net hourly wage: the money you genuinely keep, divided by the hours your job genuinely consumes. For most office workers this lands 25–40% below the headline rate they believed they earned.