How Much of a Raise Actually Reaches Your Bank Account

Effective rate vs marginal rate, the short version

Your effective rate is total tax divided by total income, the figure that tells you what share of your whole salary disappears. Your marginal rate is what happens to the very next unit of income you earn, and in a progressive system it's always higher than your effective rate, sometimes by a lot, because the early brackets are taxed lightly and only the top slice gets hit at the higher rate.

This matters for exactly one practical reason: a raise, a bonus, or extra freelance income all land on top of what you already earn, so they get taxed at your marginal rate, not your average one. If your marginal rate is 45% and your effective rate is 28%, a raise feels a lot more expensive to the tax office than your payslip up to now would suggest.

What a €10,000 raise actually nets out to

Run the same size raise through different countries and the retention rate varies more than people expect. In flat-tax systems like Romania, a raise gets taxed close to the rate you already pay, since there's no bracket to climb into. In steeply progressive systems, the same raise can lose well over half its value once income tax, surtaxes, and social contributions are all stacked on top of each other.

None of these numbers are fixed forever, since they depend on exactly where your existing salary sits relative to the next bracket threshold. Someone right at the edge of a bracket boundary keeps less of a raise than someone in the middle of one, purely because more of the increase spills into the higher rate.

The same logic runs in reverse too. A pay cut or a drop to reduced hours doesn't save you tax at the rate you'd expect either, since you're losing income at the marginal rate, not the average one. Someone whose hours get cut from full time to four days a week often finds their net pay drops by less than the gross cut would suggest, for exactly the same bracket-and-credit reasons that make a raise net out to less than expected.

Why flat-tax countries handle raises so differently

Romania keeps more of a raise than the Netherlands or Belgium for a simple structural reason: there's no second income tax bracket to climb into. The 10% rate is the only rate, so a raise costs the same proportionally as the salary that came before it. The only thing eating into it is social contributions, which are high in Romania but at least don't escalate the way progressive brackets do.

Compare that to the Netherlands, where someone earning €70,000 to €80,000 isn't just climbing into a higher bracket, they're also watching their labour tax credit and general tax credit shrink at the same time, since both phase out as income rises. That stacking effect, a higher bracket plus a shrinking credit at once, is exactly why the Dutch retention rate on this kind of raise lands under 49% despite an income tax system that doesn't look especially extreme on a quick glance at the headline rates.

The most famous trap in Europe: the UK's vanishing allowance

The UK has a well-known quirk that's worth knowing even though it sits just above the income range in the chart. The personal allowance, the first £12,570 you don't pay tax on, shrinks by £1 for every £2 you earn above £100,000, disappearing completely at £125,140. Inside that band you're paying 40% income tax on the raise itself, plus effectively losing more allowance to tax as well, and the combined effect is widely reported as an effective 60% marginal rate, higher than the UK's own top bracket of 45%.

It's a strange enough design that financial advisers in the UK specifically flag it, and it's one of the clearest real-world examples of why marginal rate and bracket rate aren't always the same thing. A raise that pushes someone from £95,000 to £110,000 doesn't just cost them the expected 40%, it costs them more, purely because of where it happens to land.

Bonuses and 13th-month pay get hit the same way

A year-end bonus or a 13th-month payment isn't a separate, gently taxed category of income in most countries, it lands on top of your regular salary for the year and gets taxed at whatever your marginal rate happens to be at that point. Someone who's already near a bracket threshold from their regular salary can watch a big chunk of a bonus disappear at the higher rate, even though the bonus itself might feel like a one-off reward rather than a raise.

This catches people out more than an actual raise does, mostly because a bonus is often planned around the gross figure HR mentions rather than a real net estimate. If a bonus is meaningful to your finances for the year, it's worth running the combined annual figure, regular salary plus bonus, through the numbers rather than assuming the bonus gets its own friendlier treatment.

Freelance and self-employed income plays by slightly different rules

If the extra income is freelance work or a move from employment to self-employment rather than a raise from an employer, the marginal rate conversation still applies, but the deductions feeding into it can be different. Some countries offer a separate self-employed deduction or allowance that doesn't exist for employees, which can soften the marginal hit on extra freelance income compared to an equivalent employee raise. Others apply the same brackets but skip employer-side contributions entirely, shifting more of the total cost onto the self-employed person directly.

The practical takeaway is the same either way: don't assume an extra €10,000 of freelance income gets taxed the same way as an extra €10,000 of salary just because the headline income tax brackets are identical. The social contribution side of the calculation is often where the real difference shows up, and it's worth checking specifically for self-employed status rather than borrowing the employee figure.

Why your first payslip after a raise can look stranger than expected

Payroll software in most countries calculates withholding based on what you'd earn if your new salary applied for the whole year, even if the raise only kicked in halfway through. That can mean a few months of slightly heavier withholding right after a raise as the system catches up, before settling into the steadier number you'd expect. It's not a mistake and it usually evens out, either through a smaller tax bill at year end or an adjustment a few payslips later, but it's worth knowing about before assuming payroll got your raise wrong.

What this means before you say yes to a raise or a new role

If a raise or a new offer pushes you right up against a bracket threshold, ask what the marginal portion actually nets out to rather than assuming the whole increase gets taxed at your current average rate. The difference between those two numbers is often the gap between a raise that feels worthwhile and one that barely changes your monthly budget.

It's also why pension contributions, salary sacrifice schemes, and other pre-tax deductions tend to matter more for people sitting right at these thresholds. Shifting part of a raise into a pension contribution before it's taxed can sometimes be worth more than taking the same amount as taxable cash, especially in a band like the UK's £100k to £125,140 zone where the marginal cost of cash income is unusually high.

And if you're negotiating a new role rather than a raise at your current job, the same logic applies to comparing two offers. A bigger gross number from a competing offer doesn't automatically mean a bigger net number, especially if it pushes you into a different bracket or past a credit phase-out threshold you weren't close to before.

If you want the actual number for your own situation rather than a general rule, run both your current salary and the salary after the raise through the calculator for your country and look at the difference in net pay rather than the headline gross figure. That gap, not the gross raise, is the number worth negotiating around.