URL: Visit APIs.json URL
- Modified: 2026-03-18
The HMRC VAT (Making Tax Digital) API enables software to submit VAT returns, retrieve VAT obligations, liabilities, payments, penalties, and customer details in compliance with UK Making Tax Digital requirements. Uses OAuth 2.0 authentication with fraud prevention headers required.
Human URL: https://developer.service.hmrc.gov.uk/api-documentation/docs/api/service/vat-api/1.0
- Government, Tax, UK, VAT, Making Tax Digital, REST
The HMRC Self Assessment APIs enable software to submit and manage self assessment tax returns, income sources, and tax calculations for individuals and sole traders under Making Tax Digital for Income Tax.
Human URL: https://developer.service.hmrc.gov.uk/api-documentation/docs/api
- Government, Tax, UK, Self Assessment, Income Tax, REST
The HMRC PAYE APIs enable payroll software to submit employer payroll data, retrieve tax codes and employee records, and manage PAYE submissions for Real Time Information (RTI) reporting.
Human URL: https://developer.service.hmrc.gov.uk/api-documentation/docs/api
- Government, Tax, UK, PAYE, Payroll, REST
The HMRC Customs Declarations APIs enable customs software to submit import and export declarations, manage authorizations, and integrate with the UK Customs Declaration Service (CDS) for trade compliance.
Human URL: https://developer.service.hmrc.gov.uk/api-documentation/docs/api
- Government, Tax, UK, Customs, Excise, REST, XML
The HMRC Corporation Tax APIs enable accounting software to submit corporation tax returns, retrieve liabilities, manage payments, and access tax calculation data for UK businesses.
Human URL: https://developer.service.hmrc.gov.uk/api-documentation/docs/api
- Government, Tax, UK, Corporation Tax, Business, REST