Your side hustle

Tax on a second income (freelancing, selling, gig work) stacked on top of your main job. Updates as you type.

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£
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Includes the £1,000 trading allowance. The "best of both" option uses whichever of the allowance or your real expenses saves you more - you cannot claim both.

Tax on your side hustle

on of side income - you keep

Deduction used
Taxable side profit
Income Tax on it
Class 4 NI on it
You keep

kept of side income

tax on next £100

Register for Self Assessment

Your side income is over £1,000, so you must register with HMRC and file a tax return.

Estimate only. Assumes Class 4 NI; small profits may also owe voluntary Class 2.

Tax as your side income grows

You keep Tax + NI

How your take-home and tax change as the side hustle scales, on a salary.

Compare saved scenarios

Scenario Side income Tax + NI You keep

Next steps

Self-employed tax

If the hustle becomes your main income

Income tax

Tax across all your income

Take-home pay

Your net pay from the day job

Side Hustle Tax Calculator by TaxFly — free UK tax calculators