Ask users for National Insurance numbers

This guidance is for government teams that build online services. To find information and services for the public, go to GOV.UK.

Ask users to provide their National Insurance number.

Open this example in a new tab: national insurance numbers
HTML
<div class="govuk-form-group">
  <label class="govuk-label" for="national-insurance-number">
    National Insurance number
  </label>
  <div id="national-insurance-number-hint" class="govuk-hint">
    It’s on your National Insurance card, benefit letter, payslip or P60. For example, ‘QQ 12 34 56 C’.
  </div>
  <input class="govuk-input govuk-input--width-10 govuk-input--extra-letter-spacing" id="national-insurance-number" name="nationalInsuranceNumber" type="text" spellcheck="false" aria-describedby="national-insurance-number-hint">
</div>
Nunjucks
{% from "govuk/components/input/macro.njk" import govukInput %}

{{ govukInput({
  label: {
    text: "National Insurance number"
  },
  hint: {
    text: "It’s on your National Insurance card, benefit letter, payslip or P60. For example, ‘QQ 12 34 56 C’."
  },
  classes: "govuk-input--width-10 govuk-input--extra-letter-spacing",
  id: "national-insurance-number",
  name: "nationalInsuranceNumber",
  spellcheck: false
}) }}

When to use this pattern

Follow this pattern whenever you need to ask for a National Insurance number.

When not to use this pattern

Never use National Insurance numbers to verify a user’s identity.

If you currently use National Insurance numbers to verify identity, find out how to protect your service against fraud.

How it works

Use a single text input labelled ‘National Insurance number’. Write it out in full and never use abbreviations such as ‘NINO’ or ‘NI Number’.

Show a National Insurance number using the format ‘QQ 12 34 56 C’ — the spaces will break up the number to make it easier to read, particularly for screen reader users.

When asking for a National Insurance number:

  • allow for 13 characters as National Insurance numbers are spaced in pairs followed by a single letter
  • let users enter upper and lower case letters, additional spaces and punctuation
  • ignore any unwanted characters before validating
  • avoid using ‘AB 12 34 56 C’ as an example because it belongs to a real person and use ‘QQ 12 34 56 C’ instead
  • set the spellcheck attribute to false so that browsers do not spellcheck the National Insurance number
Open this example in a new tab: national insurance numbers second
HTML
<div class="govuk-form-group">
  <label class="govuk-label" for="national-insurance-number">
    National Insurance number
  </label>
  <div id="national-insurance-number-hint" class="govuk-hint">
    It’s on your National Insurance card, benefit letter, payslip or P60. For example, ‘QQ 12 34 56 C’.
  </div>
  <input class="govuk-input govuk-input--width-10 govuk-input--extra-letter-spacing" id="national-insurance-number" name="nationalInsuranceNumber" type="text" spellcheck="false" aria-describedby="national-insurance-number-hint">
</div>
Nunjucks
{% from "govuk/components/input/macro.njk" import govukInput %}

{{ govukInput({
  label: {
    text: "National Insurance number"
  },
  hint: {
    text: "It’s on your National Insurance card, benefit letter, payslip or P60. For example, ‘QQ 12 34 56 C’."
  },
  classes: "govuk-input--width-10 govuk-input--extra-letter-spacing",
  id: "national-insurance-number",
  name: "nationalInsuranceNumber",
  spellcheck: false
}) }}

Reusing entered National Insurance numbers

WCAG 2.2 Do not ask for a National Insurance number more than once within a single journey, if only one person’s details are needed.

Make sure users can easily reuse previously entered National Insurance numbers within a single journey, unless doing so would be a major safety or security concern. This is to comply with WCAG 2.2 success criterion 3.3.7 Redundant Entry.

You can make it easier to reuse National Insurance numbers through one of these methods:

  • pre-populate fields with the previously entered number
  • show any previously entered numbers as an option for the user to select

Continue to give users the option to enter a new National Insurance number.

Error messages

Error messages should be styled like this:

Open this example in a new tab: national insurance number input with errors – national insurance numbers
HTML
<div class="govuk-form-group govuk-form-group--error">
  <label class="govuk-label" for="national-insurance-number">
    National Insurance number
  </label>
  <div id="national-insurance-number-hint" class="govuk-hint">
    It’s on your National Insurance card, benefit letter, payslip or P60. For example, ‘QQ 12 34 56 C’.
  </div>
  <p id="national-insurance-number-error" class="govuk-error-message">
    <span class="govuk-visually-hidden">Error:</span> Enter a National Insurance number in the correct format
  </p>
  <input class="govuk-input govuk-input--width-10 govuk-input--extra-letter-spacing govuk-input--error" id="national-insurance-number" name="nationalInsuranceNumber" type="text" spellcheck="false" value="12345678" aria-describedby="national-insurance-number-hint national-insurance-number-error">
</div>
Nunjucks
{% from "govuk/components/input/macro.njk" import govukInput %}

{{ govukInput({
  label: {
    text: "National Insurance number"
  },
  hint: {
    text: "It’s on your National Insurance card, benefit letter, payslip or P60. For example, ‘QQ 12 34 56 C’."
  },
  classes: "govuk-input--width-10 govuk-input--extra-letter-spacing",
  id: "national-insurance-number",
  name: "nationalInsuranceNumber",
  value: "12345678",
  errorMessage: {
    text: "Enter a National Insurance number in the correct format"
  },
  spellcheck: false
}) }}

Make sure errors follow the guidance in error message and have specific error messages for specific error states.

If the National Insurance number is not in the correct format and there is no example

Say ‘Enter a National Insurance number that is 2 letters, 6 numbers, then A, B, C or D, like QQ 12 34 56 C’.

If the National Insurance number is not in the correct format and there is an example

Say ‘Enter a National Insurance number in the correct format’.

Help improve this pattern

To help make sure that this page is useful, relevant and up to date, you can:

Tell us if your service uses this pattern

Take part in our usage survey (opens in a new tab) to help us improve this pattern to better meet the needs of the services that use it.

Need help?

If you’ve got a question about the GOV.UK Design System, contact the team.