What is Effective Tax Rate? UK Definition 2026/27
Quick Answer
Your actual tax as a percentage of total income, usually lower than marginal rate.
Definition of Effective Tax Rate
The effective tax rate is your total tax paid divided by your total income, expressed as a percentage. Its typically lower than your marginal rate because some income falls within lower bands and tax-free allowances. Understanding effective rate helps with financial planning and comparing tax efficiency of different income structures.
Effective Tax Rate — Key Facts for 2026/27
| £30k salary effective | ~14% |
| £50k salary effective | ~20% |
| £100k salary effective | ~30% |
| Marginal vs effective | Always marginal >= effective |
How Effective Tax Rate Works — Example
- 1Salary: £50,000
- 2Income tax: £7,486
- 3National Insurance: £2,994
- 4Total tax: £10,480
- 5Effective rate: 21%
- 6Marginal rate: 32% (40% + 2% NI in higher band)
How Effective Tax Rate Affects Your Tax
Knowing your effective rate helps compare different income sources and structures. A 40% taxpayer doesnt pay 40% on all income - only on the portion above the higher rate threshold.
Official HMRC Guidance on Effective Tax Rate
For official guidance, refer to HMRC's documentation. Tax rules can change, so always verify current rates and thresholds on gov.uk.
HMRC: Income Tax ratesFrequently Asked Questions about Effective Tax Rate
Related Tax Terms
Accuracy Note
This information is for guidance only and is based on 2026/27 tax year rates. Tax rules are complex and your circumstances may differ. For personal advice, consult a qualified accountant or tax adviser.