Taxes for young earners: US vs UK vs EU (the basics)

Tax is the part of earning that young people most often get wrong — usually by assuming it doesn't apply to them. It often does, at least in principle. The good news is the basics are simple, the thresholds are often generous for small earners, and once you're keeping a few records, staying on the right side of it takes minutes. Here's the plain-English version for the US, UK and EU.

Two types of income: job vs self-employed

Before the country detail, one distinction explains almost everything. If you have an employer (a shop, a café), they usually take tax out of your pay before you get it — you may not have to do much. If you earn for yourself (freelancing, tutoring privately, reselling as a business), no one withholds tax for you, so the responsibility to track and declare it is yours.

Most young earners' confusion comes from treating self-employed income like employee income — assuming someone else has handled the tax. With a side hustle, nobody has. That's why records matter.

United States: the basics

In the US, income is generally taxable, but whether you must file depends on how much and what type you earn. Two things to know as a young self-employed earner:

• Self-employment tax can apply once your net self-employment earnings reach a low yearly figure, separate from income tax. [VERIFY: current US net self-employment earnings threshold that triggers self-employment tax, and the standard deduction for a dependent, for the 2026 tax year — suggested source: IRS.gov]
• Employee jobs withhold tax from each paycheck; you might get some back when you file if too much was withheld.

If you're claimed as a dependent (common for teens), special filing rules apply. The practical move: keep records, and check the current IRS thresholds — or have a parent help — before assuming you don't need to file.

United Kingdom: the basics

The UK is relatively friendly to small earners. Two features matter:

• The trading allowance lets you earn a small amount of casual or self-employed income each year without needing to report it. Below it, you generally don't have to tell HMRC; above it, you typically register for Self Assessment and file a return. [VERIFY: current UK trading allowance amount and the income level requiring Self Assessment registration for 2026 — suggested source: GOV.UK]
• The personal allowance means a chunk of total income is tax-free each year; employee jobs handle tax automatically through PAYE.

So a modest side hustle may fall under the trading allowance and need no action — but the moment you pass it, register and report. Don't guess the figure; look it up on GOV.UK, because it can change.

EU: it depends on the country

There's no single EU tax rule — each member state runs its own system, so the honest answer is "it depends where you live." That said, some common patterns:

• Most countries expect you to register as self-employed once you earn beyond a small threshold, and may charge income tax plus social contributions.
• Several have simplified or small-business regimes for low earners, with lighter paperwork.
• Thresholds, rates and the registration process vary widely between, say, Germany, the Netherlands, France and the Nordic countries. [VERIFY: representative self-employment registration thresholds and small-earner regimes for key EU countries (Germany, Netherlands, France, a Nordic example) for 2026 — suggested source: each national tax authority]

If you're in the EU, search your national tax authority's site for "self-employed" or "small business" guidance, ideally in your own language, for the figures that actually apply to you.

What to track (and for how long)

You don't need software. A spreadsheet with a row per payment is plenty: date, who paid, amount, fees, and a note of what it was for. Keep digital copies of anything official. Many tax authorities expect you to keep records for several years, so don't delete them at the end of the year.

This habit pays off twice: tax time becomes quick, and you can finally see whether a hustle is worth your hours after fees. Our income calculator gives a before-tax estimate; your records show the after-tax reality.

Costs that can reduce your tax

If you're self-employed, legitimate work costs often reduce the income you're taxed on. Depending on your country and the work, that might include platform fees, materials, a subscription you genuinely need, postage, or a share of phone/internet use. Rules on what counts vary, so check locally — but the principle is widespread: you're usually taxed on profit, not on every pound or dollar that came in.

Keep receipts for anything you might claim. If the numbers get significant, it's worth a short chat with a qualified adviser; for small amounts, your tax authority's website usually explains what's allowable.

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