NHS Charge Exemptions

You don't have to pay for NHS dental treatment if you're:
Low income benefits
You're entitled to free NHS dental treatment if you or your spouse (including civil partner) receive:
Certificates to help with health costs
You can receive free NHS dental treatment if you're entitled to or named on:
People named on an NHS certificate for partial help with health costs (HC3) may also get help.
https://www.nhs.uk/common-health-questions/dental-health/who-is-entitled-to-free-nhs-dental-treatment-in-england/
Disclaimer:
If you are in receipt of a state benefit which entitles you to free NHS treatment, you will be asked to show your dentist written proof that you do not have to pay for all or part of your NHS treatment. You will also be asked to sign a form to confirm that you do not have to pay. If you say you have the right to free treatment when you do not, you may incur a penalty charge.
- under 18, or under 19 and in full-time education
- pregnant or have had a baby in the previous 12 months
- being treated in an NHS hospital and your treatment is carried out by the hospital dentist (but you may have to pay for any dentures or bridges)
- receiving low income benefits, or you're under 20 and a dependant of someone receiving low income benefits
Low income benefits
You're entitled to free NHS dental treatment if you or your spouse (including civil partner) receive:
- Income Support
- Income-related Employment and Support Allowance
- Income-based Jobseeker's Allowance
- Pension Credit Guarantee Credit
- Universal Credit (in certain circumstances)
Certificates to help with health costs
You can receive free NHS dental treatment if you're entitled to or named on:
- a valid NHS tax credit exemption certificate
- a valid HC2 certificate – which is available for people on a low income
People named on an NHS certificate for partial help with health costs (HC3) may also get help.
https://www.nhs.uk/common-health-questions/dental-health/who-is-entitled-to-free-nhs-dental-treatment-in-england/
Disclaimer:
If you are in receipt of a state benefit which entitles you to free NHS treatment, you will be asked to show your dentist written proof that you do not have to pay for all or part of your NHS treatment. You will also be asked to sign a form to confirm that you do not have to pay. If you say you have the right to free treatment when you do not, you may incur a penalty charge.