What Does D1 Mean?
D1 means all income from this source is taxed at 45%. This is rare and typically only used for a second income source for very high earners.
Is My Tax Code Correct?
If you think your tax code is wrong, you can check it on your payslip, through your HMRC online account, or by calling HMRC on 0300 200 3300. A wrong tax code means you're paying too much or too little tax.
All Common Tax Codes
| Code | Meaning |
|---|---|
| 1257L | £12,570 personal allowance |
| BR | All income taxed at 20% |
| D0 | All income taxed at 40% |
| D1 | All income taxed at 45% |
| NT | No tax deducted |
| 0T | No personal allowance |
| K-codes | You owe tax from elsewhere |
| W1 or M1 | Non-cumulative basis |
| S-prefix | Scottish income tax rates |
| C-prefix | Welsh income tax rates |
What D1 Means
Tax code D1 means all income from this employment is taxed at the additional rate of 45%. This is used when your other income already exceeds £125,140. This code is relatively rare and applies only to very high earners with multiple income sources.
When This Code Is Used
D1 is correctly applied when your income from other sources exceeds £125,140. At this point, your Personal Allowance has been fully tapered away and all additional income falls in the additional rate band. If you receive this code and your total income is below £125,140, contact HMRC.
Impact on Your Pay
On D1, 45% of every pound is deducted. Combined with 2% NI, the effective deduction rate is 47%. At this income level, pension contributions and other tax-efficient strategies become extremely important.
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