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Class 1 National Insurance (NI) contribution rates for the current tax year, what NI category letters mean.
An employee’s Class 1 National Insurance is made up of contributions:…
Employers use an employee’s National Insurance category letter when they…
National Insurance contributions if you're self-employed - rates and exceptions.
How to stop or start paying the reduced rate of National Insurance (NI) as a married woman or widow, how it affects your benefits.
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