Pick any two UK PAYE tax codes and we will line up the allowance, emergency status, region and approximate annual tax on a £30,000 salary so you can see exactly how they differ.
Last updated 2026-04-12
| Attribute | K50 | S0T X |
|---|---|---|
| Category | KCode | Emergency |
| Region | rUK | Scotland |
| Allowance | £-500 | £0 |
| Emergency / non-cumulative | No | Yes |
| Approx. annual tax on £30k | £6,100 | £6,000 |
| In one sentence | Adds £500 to your taxable pay because untaxed income exceeds your allowance. | Scottish taxpayer version of 0T - same allowance logic, but Scottish income-tax rates apply. on a non-cumulative (X) basis. |
Bottom line on £30k
On a £30,000 salary, K50 deducts roughly £6,100 in income tax per year vs £6,000 for S0T X. That is a difference of £100 per year - K50 is more expensive.
Hand-picked side-by-sides that answer the most-searched UK tax-code questions.
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