Sources
Last updated: January 2025
About our data
All thresholds and rates used in our calculator are sourced directly from official GOV.UK publications. We update the calculator at the start of each tax year when HMRC announces new rates.
Primary sources for 2025/26
GOV.UK: Rates and thresholds for employers 2025 to 2026
Last accessed: 2025-01-01
GOV.UK: Employment Allowance
Last accessed: 2025-01-01
GOV.UK: Employment Allowance eligibility
Last accessed: 2025-01-01
GOV.UK: National Insurance for company directors
Last accessed: 2025-01-01
Additional references
GOV.UK: New State Pension qualifying years fact sheet
Explains how qualifying years work for State Pension purposes
GOV.UK: Check your State Pension
Check your State Pension forecast and NI record
Important notes
- We are not affiliated with HMRC or any government body
- Tax rules can change - always verify current rates with official sources before making decisions
- For advice specific to your situation, consult a qualified accountant
- If you spot an error in our data, please let us know