Maximum National Insurance contributions calculator
If you earn income from more than employment or self-employment (including a share of partnership profit) in the same tax year, you are usually required to pay NI on each. This may result in you overpaying contributions, although it’s still possible to underpay, which could jeopardise your state pension rights.
Using the calculator
The calculation required to check NI contributions can involve a number of steps. Using the minimum data our calculator works out whether you have paid too much or too little NI and produces a report you can send to HMRC to support a claim for repayment, if appropriate.
Related Topics
-
Electronic VAT return and payment due
-
HMRC checks directors’ loans are paid up
HMRC is writing to agents to check corporation tax returns for previous years are correct as it used to be possible to add a future date for an anticipated loan repayment. What’s the issue and what should you do if your advisor receives a letter?
-
Working from home tax relief scrapped in Budget
Employees who are required to work from home are currently able to claim tax relief at a flat rate of £6 per week. That's changing from 6 April 2026. What's the full story?